https://www.robbiemallett.com/researchblog daily 0.75 2025-08-15 https://www.robbiemallett.com/researchblog/2025/4/8/the-icarp-iv-summit monthly 0.5 2025-04-08 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1744115873080-KOPGUAIFEUF8S2ROVOS7/WhatsApp+Image+2025-03-26+at+00.49.30+%281%29.jpeg Research Blog - The ICARP IV Summit https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1744115893306-2M4T12V8HZBKXP8WA0KJ/WhatsApp+Image+2025-03-26+at+00.49.30.jpeg Research Blog - The ICARP IV Summit https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1744115932596-KDXVSTMBCDCARO3OSCUA/WhatsApp+Image+2025-03-26+at+03.07.11.jpeg Research Blog - The ICARP IV Summit https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/176e95da-b5f6-4b94-afd1-b13658054e2f/overall.png Research Blog - The ICARP IV Summit - Make it stand out Overall scoring of our draft recommendations by the townhall audience. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/87b0f8bf-2144-48a3-942e-87f6485c3596/meta.png Research Blog - The ICARP IV Summit - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.robbiemallett.com/researchblog/2025/4/7/a-scar-fellowship-adventure monthly 0.5 2025-04-08 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/5b6e772f-f2a4-46f6-b758-8cc20c821264/cmo.png Research Blog - A SCAR fellowship adventure - Make it stand out The two pools of the Churchill Marine Observatory, where we grew sea ice and flooded it. Photo provided by U. Manitoba to Global News. Click to enlarge. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/588d65fe-259c-44ca-b329-eab5a229aa85/flooding.jpg Research Blog - A SCAR fellowship adventure - Make it stand out Some flooded snow on Antarctic sea ice that I encountered with Vishnu Nandan in 2023. The sea ice surface was pushed 1 cm below the surface, and capillary action had soaked the snowpack 8 cm above the waterline. Photo from Mallett et al., 2024. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/e78a6011-8d86-4629-86ba-1448d95734fb/sawing.gif Research Blog - A SCAR fellowship adventure - Make it stand out Clement Soriot cutting out a mini-ice floe https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/717ed534-0618-4a94-b78a-3fbba385eddd/PXL_20250220_214042621.jpg Research Blog - A SCAR fellowship adventure - Make it stand out Photograph showing capillary action from 5mm of flooding near the base of our manufactured, small-grained snowpack. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/ce10c425-b67d-42cb-af6e-1e7f23df4934/WhatsApp+Image+2025-04-08+at+10.30.12.jpg Research Blog - A SCAR fellowship adventure - Make it stand out The on-site team. Left to right: me, Anton Komarov, John Yackel, Clement Soriot and Kiledar Tomar. https://www.robbiemallett.com/researchblog/2024/12/17/acronyms-and-akureyri monthly 0.5 2024-12-17 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1734456353097-OD9O966ZWFKGGJCXIEK0/arch.jpeg Research Blog - Acronyms and Akureyri https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1734456352885-1KE5PLPU59XT4T4TMSVW/hot_tub.jpeg Research Blog - Acronyms and Akureyri https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1734456357666-9RZKV67CRGILUFLHLJYZ/PXL_20241024_160335850.jpg Research Blog - Acronyms and Akureyri https://www.robbiemallett.com/researchblog/2024/10/21/peer-review-on-deficiencies-publisher-pays-and-my-track-record monthly 0.5 2025-03-24 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/c1567778-7a5c-46c1-a2a9-64f4ed5243f5/spillway.gif Research Blog - Peer review: on deficiencies, publisher-pays, and my track record - Make it stand out Scale diagram of scientific literature pipeline with peer reviewers pictured standing in foreground. https://www.robbiemallett.com/researchblog/2024/9/17/cryospheric-science-and-policy-in-beijing monthly 0.5 2024-09-18 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/5a0ede25-57ed-470b-97f0-19765889bf39/badge.jpg Research Blog - Cryospheric Science and Policy in Beijing - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/cc127652-8d1e-4aff-87ce-f670e5477c39/PXL_20240913_062414863.jpg Research Blog - Cryospheric Science and Policy in Beijing - Make it stand out It's not a competition, but sea ice triumphantly wins biggest cryosphere component by area. Although I can perhaps hear the snow-on-the-ground people grumbling somewhere. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1726584843024-4TZ8NOR2IZ1U9G3Z30YN/PXL_20240914_092557751.jpg Research Blog - Cryospheric Science and Policy in Beijing https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1726584868753-P610HZQ0TSML6LCC9M0B/PXL_20240914_131307611.jpg Research Blog - Cryospheric Science and Policy in Beijing https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1726584947093-C1QFK79KPTNE9SBH7UFJ/street.jpg Research Blog - Cryospheric Science and Policy in Beijing https://www.robbiemallett.com/researchblog/2024/8/26/et-tu-linregress monthly 0.5 2024-08-26 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/8cd90f39-c51c-4482-9942-8367ce3ab84e/x.png Research Blog - Et tu, linregress? - Make it stand out Schematic showing how I constructed my synthetic data, by making an ellipse of values on a background of zeros (see source material at bottom), and then blurring it with a Gaussian filter. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/f5dae36b-267d-4863-bcd3-20e32d347f68/Screenshot+from+2024-08-26+12-31-06.png Research Blog - Et tu, linregress? - Make it stand out Illustration of how the underlying relationship (red line) is not well represented by the least squares regression line. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/7a17151a-949d-4761-830b-e7d78cac086e/Screenshot+from+2024-08-26+12-31-42.png Research Blog - Et tu, linregress? - Make it stand out Similar to figure above, but with axes flipped: the gradient of the new LSR line is not the inverse of the previous one, as I had expected. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1724670299274-LWYBBQJCVSHQ7ADKSQWB/Screenshot+from+2024-08-26+12-31-06.png Research Blog - Et tu, linregress? https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1724669862059-BF8WCNCITB3YJ74AE0HA/Screenshot+from+2024-08-26+12-57-23.png Research Blog - Et tu, linregress? https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1724669874241-V9REWEPLDMPKGNTTVNSZ/Screenshot+from+2024-08-26+12-52-39.png Research Blog - Et tu, linregress? https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/c5598609-614b-4789-86b3-a7135c59dfff/Screenshot+from+2024-08-26+12-31-57.png Research Blog - Et tu, linregress? - Make it stand out Results of the orthogonal distance regression (scipy.odr) - it matches the underlying relationship. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/016262e6-2710-430c-9639-d16e0292bb51/51Vl-EhLsxL._SL1360_.jpg Research Blog - Et tu, linregress? - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.robbiemallett.com/researchblog/2024/5/30/a-nice-altimetry-reference monthly 0.5 2024-05-30 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/6988f278-ec6f-4a86-a21b-c354e644b49a/stanley.png Research Blog - A nice sea ice altimetry reference - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.robbiemallett.com/researchblog/2024/5/4/svalbard-svea-and-a-raspberry-pi-radar monthly 0.5 2024-05-07 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/ba651c38-5ccc-4d41-8adf-edab78ff6416/kuka.jpg Research Blog - Svalbard, Svea and a Raspberry Pi Radar - Make it stand out Vishnu Nandan and I with KuKa, a big expensive science machine. Could we do a bit less science with a lot less equipment? https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/3ece787e-87a5-48ed-a812-482370bc06b6/MOSAIC_RS.jpg Research Blog - Svalbard, Svea and a Raspberry Pi Radar - Make it stand out A number of research radars and radiometers at the MOSAiC remote sensing site. These instruments scan at a variety of incidence and view angles, but because they’re fixed in place they end up scanning different patches of snow every time they change angle. Inference often relies on the assumed spatial homogeneity of the snow. Unfortunately, wind drifting of snow often means its properties are different nearer the instrument (steeper incidence angles) than they are far away (at lower incidence angles). Lighter and more nimble radars might be able to pivot about the same patch of snow, and view it from different angles. Photo from EUMETSAT. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/c08d91aa-1171-4869-b0ae-479bc26ec92c/the_radar.jpg Research Blog - Svalbard, Svea and a Raspberry Pi Radar - Make it stand out The radar setup. The battery and a USB hub are mounted to the tripod with velcro, and the radar itself is visible through a mylar window in the black casing. The screen is mounted on the back of the case, also with velcro. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/c5100e85-9ba6-4dc9-98de-5342c77b2af2/skidoos_cabin.jpg Research Blog - Svalbard, Svea and a Raspberry Pi Radar - Make it stand out Morning routine: loading the sleds and skidoos with our cabin in the background. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/c7449f35-4cce-4412-9621-6c325b2f089f/steep_ground.jpg Research Blog - Svalbard, Svea and a Raspberry Pi Radar - Make it stand out Skidooing on steep snow while travelling to Svea. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/e04e6e8c-5d52-4e8b-ae2c-539ddc88c119/flooded+pit.jpg Research Blog - Svalbard, Svea and a Raspberry Pi Radar - Make it stand out A flooded and layered snow pit on sea ice. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/0a0f1f25-7065-4325-98b5-ca2b33c8f357/sea_ice.jpg Research Blog - Svalbard, Svea and a Raspberry Pi Radar - Make it stand out Getting ready to go on the sea ice (in background). https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/5ba613e0-b238-4660-9717-4437be91c95d/snowradar.jpg Research Blog - Svalbard, Svea and a Raspberry Pi Radar - Make it stand out The NORCE drone with the UWB radar. https://www.robbiemallett.com/researchblog/2024/5/4/iasc-fellowship-and-the-arctic-science-summit-week monthly 0.5 2024-05-04 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/505562a2-8531-45de-9327-560bbed98323/cockpit.jpg Research Blog - IASC Fellowship and the Arctic Science Summit Week - Make it stand out Inside of the Dash-7 plane flying from Rothera research station to Punta Arenas, Chile https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/759a2f36-a759-456a-94bf-082680f45cfe/takeoff_view.jpg Research Blog - IASC Fellowship and the Arctic Science Summit Week - Make it stand out View of Rothera research station from the air when leaving, with sea ice to the north and open water elsewhere. The large blue building (upper left of image) is the new Discovery Building, which is nearly complete. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/08bb8273-448c-422e-bbdb-fa25e716ec25/welcome.jpg Research Blog - IASC Fellowship and the Arctic Science Summit Week - Make it stand out Henry Burgess opens ASSW. The UK hosted the conference this year, and Henry was chair of the local organising committee. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/b07bc9fa-399c-4a64-9c29-81a802501932/meeting.jpg Research Blog - IASC Fellowship and the Arctic Science Summit Week - Make it stand out A typical ASSW meeting room in use by ICARP Research Priority Team 2 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/644fc1c7-6b07-4771-97bf-72799fe50ace/scottish_gov.jpg Research Blog - IASC Fellowship and the Arctic Science Summit Week - Make it stand out Above: a reception for ASSW’s Science Day at Edinburgh City Chambers. Right: reception at the Norwegian consulate in Edinburgh (rare photo of me wearing suit…) https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/f12fa295-b0ff-4e59-a717-9793af9b1c6e/consulate.jpg Research Blog - IASC Fellowship and the Arctic Science Summit Week - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.robbiemallett.com/researchblog/2024/4/21/growing-pains-at-cop-28-in-dubai monthly 0.5 2024-05-04 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/23ff8acb-9d33-429d-8bf2-0ecc0c5402ae/chile.jpeg Research Blog - Growing Pains at COP 28 in Dubai - Make it stand out Discussing the threat of sea level rise with the environment minister of Chile. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/b14590c1-4c34-446c-9cfe-6b992ed079c3/AMI1.jpeg Research Blog - Growing Pains at COP 28 in Dubai - Make it stand out Inaugural meeting of Ambition on Melting Ice at COP27 in Sharm el-Sheikh https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1038cdd8-6831-4a44-894b-c51840db56c5/protest_line.jpg Research Blog - Growing Pains at COP 28 in Dubai - Make it stand out ICCI organised a half-way demonstration on sea level rise - Photograph by Irene Quaile. https://www.robbiemallett.com/researchblog/2024/5/4/too-big-to-blog monthly 0.5 2024-05-04 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/79a1abf7-44c5-4879-af56-75dbfa679c19/rothera_hangar_sea_ice.jpg Research Blog - Rothera: Too big to blog? - Make it stand out Sea ice in Hangar Cove. https://www.robbiemallett.com/researchblog/2025/4/10/feeling-the-heat-in-antarctica-the-urgency-of-sea-ice-research monthly 0.5 2025-04-10 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/29c43833-86be-4236-8d69-df385d232281/Robbie-Mallett-July-Sea-Ice-Coverage-in-Antarctica-360x252.jpeg Research Blog - Feeling the heat in Antarctica - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/226dd5d7-c4c2-408b-b3f7-65fbe3324b72/VICKI_WARKE.jpeg Research Blog - Feeling the heat in Antarctica - Make it stand out Vishnu and I working with our station leader to set up instruments on 30 cm thick sea ice. The white sea ice that we’re standing on has been around long enough to accumulate snow, but the grey ice in the background is less than ten centimetres thick, and can easily be destroyed by strong winds. Photo: Vicki Warke, British Antarctic Survey. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/85b8473b-b5a9-49b3-8588-7ccaf91bd005/measuring_hires.jpeg Research Blog - Feeling the heat in Antarctica - Make it stand out Generating a very-high-resolution model of snow roughness using our laser scanner. This model can be compared to radar measurements to better understand how snow reflects radar waves. Photo: Vishnu Nandan, University of Manitoba. https://www.robbiemallett.com/researchblog/2022/12/13/diverse-ambitions-at-cop27-and-the-cryosphere-pavilion monthly 0.5 2022-12-13 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/39525f9a-930c-417f-b6d8-d9788c4e30f1/trombone.png Research Blog - Diverse Ambitions at COP27 and the Cryosphere Pavilion - Make it stand out Composer and trombonist Simon Petermann performing in front of the Cryosphere Pavilion’s pillars, as part of a broader piece on glacier loss “Waking the Giants”. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/d4598851-af5f-4983-9ee6-2bf65bd73242/tobler_cropped.png Research Blog - Diverse Ambitions at COP27 and the Cryosphere Pavilion - Make it stand out Me speaking at the dedication ceremony for the toppled Arctic sea ice pillar (visible on the right). https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/81df7c50-ded2-4530-ab83-6bc494c1a4f8/cop27_cover.png Research Blog - Diverse Ambitions at COP27 and the Cryosphere Pavilion - Make it stand out Excerpt from the “Sharm el-Sheikh Implementation Plan”, also known as the COP cover agreement. It mentions the cryosphere and tipping points for the first time. https://www.robbiemallett.com/researchblog/2022/12/3/the-cmip6-arctic-processes-camp-at-sminestationen-denmark monthly 0.5 2022-12-13 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/d8e8663b-af4b-403a-ae6b-a81904c8a391/seaminestation.jpg Research Blog - The CMIP6 Arctic Processes Camp at Søminestationen, Denmark - Make it stand out The beautiful Søminestationen (sea mine station in Danish), located by the side of a fjord outside of Copenhagen. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/3bef25d4-059b-4bff-84c5-752298fdcdb5/CMIP6_Deck_1200x1200.jpg Research Blog - The CMIP6 Arctic Processes Camp at Søminestationen, Denmark - Make it stand out Schematic of the Coupled Model Intercomparison Project. The models are intercompared with a variety of metrics and experiments, and their outputs are used to understand variability, predictability, and future climate. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/6acfa6f4-7126-4bde-a64e-12c674ef0e14/amplification.png Research Blog - The CMIP6 Arctic Processes Camp at Søminestationen, Denmark - Make it stand out Recent Arctic amplification in he ERA5 atmospheric reanalysis data set. In these data the Arctic is warming at 3.6x the global average rate. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/f2447243-1e90-4c17-b196-88466b53318c/Pithan_2014.png Research Blog - The CMIP6 Arctic Processes Camp at Søminestationen, Denmark - Make it stand out Winter variability of air temperature with height under clear (red) and cloudy (blue) skies at the SHEBA campaign. Figure from Pithan et al., 2014. Temperature initially increases with height - this is called a temperature inversion. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/6470ab0c-bece-4c0b-affa-5d0ea8616a38/seamine-min.jpg Research Blog - The CMIP6 Arctic Processes Camp at Søminestationen, Denmark - Make it stand out Group photo on a (presumably decommissioned) torpedo outside the research station, which takes its name from the history of naval weapons development. https://www.robbiemallett.com/researchblog/2022/11/25/antarctic-pre-deployment-training monthly 0.5 2022-11-25 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/c0c5ae43-7593-40fd-b24a-ecd7e9252ad6/Location-of-Rothera-Station-67-34S-68-08W-Modified-from-a-map-by-Kikos-CC-BY-SA.png Research Blog - Antarctic Pre-Deployment Training - Make it stand out Location of Rothera station in West Antarctica, where Vishnu and I will spend eight months of 2023. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1669392646494-7DRJ72UKV1D3YIQMUZAM/IMG-20220910-WA0024.jpg Research Blog - Antarctic Pre-Deployment Training https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1669392659199-YF1EQR77YJC5BS1CM1M4/PXL_20220909_141754566.jpg Research Blog - Antarctic Pre-Deployment Training https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1669392666901-6IRCKKX226AHZM70KUZ6/PXL_20220910_095719170.jpg Research Blog - Antarctic Pre-Deployment Training https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1669392663584-IGHP3X1JL5917NLWUQ7D/WhatsApp+Image+2022-11-25+at+16.52.55.jpeg Research Blog - Antarctic Pre-Deployment Training https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1669392937885-MXR0G5P994JUYIJUUI0U/PXL_20220914_135948058.jpg Research Blog - Antarctic Pre-Deployment Training https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1669392928322-9ALYP8EO2Z2KNI9QP387/PXL_20220914_142944848.jpg Research Blog - Antarctic Pre-Deployment Training https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1669392941018-Y2LYAKB4PUFP023EMANT/PXL_20220915_095731592.jpg Research Blog - Antarctic Pre-Deployment Training https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1669392946313-OW9K4B47G7AEUG4JS8SJ/PXL_20220915_125140438.jpg Research Blog - Antarctic Pre-Deployment Training https://www.robbiemallett.com/researchblog/2022/8/23/challenges-to-the-retrieval-of-sea-ice-thickness-in-antarctica-with-cryosat-2-and-envisat monthly 0.5 2022-08-23 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/ecc140cf-9c7b-4d3a-a571-ecef3d463e7d/BW_willatt.png Research Blog - Challenges to the retrieval of sea ice thickness in Antarctica with CryoSat-2 and Envisat - Make it stand out Figure and caption from WIllatt et al., 2010. Shows brine wicking and negative freeboard. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/046d8bf7-fa91-4060-aeba-22b34a6fa900/BW_massom.png Research Blog - Challenges to the retrieval of sea ice thickness in Antarctica with CryoSat-2 and Envisat - Make it stand out Figure and caption from Massom et al., 2001 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/47791004-9180-46ab-9d2a-b1a0c6225ba8/core.jpg Research Blog - Challenges to the retrieval of sea ice thickness in Antarctica with CryoSat-2 and Envisat - Make it stand out A core of some snow on Antarctic sea ice (my photo). There’s a continuum from large-grained, icy, highly scattering snow to basically clear superimposed ice at the base. https://www.robbiemallett.com/researchblog/2022/6/5/biogeochemistry-on-ice-in-the-canadian-arctic monthly 0.5 2022-06-05 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/ff8761fd-e844-4fac-82f4-ea1bb27db1f1/kneeling.jpg Research Blog - Biogeochemistry on ice in the Canadian Arctic - Make it stand out Me looking at the ice surface that was gradually revealed over the week as the snow melted back. The ice surface was very fresh, as a result of nearby river. This fresh-ice cap overlay the more traditional, highly saline sea ice. Photo Evelyn Workman (BAS) (@efworkman96) https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1a0166b5-54b1-43b4-8591-4d10fcfbb4ba/brine_channels.jpeg Research Blog - Biogeochemistry on ice in the Canadian Arctic - Make it stand out Brine channels (white dots) are visible in a cross section of a sea ice core. These channels allow the vertical flow of gas and nutrients through the ice. They also allow the ice to desalinate over time through brine convection. Photo Georges Kanaan (UW) (@scientificgeo) https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/4adea34e-755c-419c-bf1a-57519259fa2e/brine_sampling.jpg Research Blog - Biogeochemistry on ice in the Canadian Arctic - Make it stand out Odile Crabeck and Bruno Delille leading brine sampling with a peristaltic pump. When a ‘sack hole’ is drilled part-way through the ice, it fills with brine which seeps in due to ice porosity. This can be pumped out into bottles using a pump. https://www.robbiemallett.com/researchblog/2022/6/3/antarctic-fieldwork-with-a-cristal-band-radar monthly 0.5 2022-06-03 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/80577320-bfd2-408d-ac19-54340ac0988d/timo1.jpeg Research Blog - Antarctic Fieldwork with a CRISTAL-band Radar - Make it stand out Jeremy Wilkinson (BAS) and I digging a snow pit. A tabular iceberg can be seen on the left-horizon. Photo by Timo Hecken, German Heliservice. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/8f689f8d-b24e-4eab-92b3-80442fe98677/timo2.jpeg Research Blog - Antarctic Fieldwork with a CRISTAL-band Radar - Make it stand out The radar instrument stands next to us while we dig a snowpit over rough sea ice. Photo Timo Hecken, German Heliservice. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/dda6230e-011d-4a37-acbf-620963aeecae/timo3.jpeg Research Blog - Antarctic Fieldwork with a CRISTAL-band Radar - Make it stand out The floe that supported us on the final day. By this point we were drifting freely and the floe was rotating and moving relative to its neighbours. Photo Timo Hecken, German Heliservice. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1654267726311-BE1ZMWXVKDJL68L2E3EJ/core.jpg Research Blog - Antarctic Fieldwork with a CRISTAL-band Radar https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1654267726228-J06D2UD11U9AJDCATMBM/PXL_20220416_131637749.jpg Research Blog - Antarctic Fieldwork with a CRISTAL-band Radar https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1654267727258-XOSP54YG75F343WA3ODP/radar_on_snow.jpg Research Blog - Antarctic Fieldwork with a CRISTAL-band Radar https://www.robbiemallett.com/researchblog/2021/12/23/churchill-sea-ice-fieldwork monthly 0.5 2021-12-27 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/7cb9f9b2-5c10-47a9-b152-2c08eb78283b/Where-is-Churchill-on-map-Canada.jpg Research Blog - Churchill Sea Ice Field Campaign - Make it stand out Position of Churchill on a map of Canada https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/119e5e9b-94b8-48e9-a274-c374e9813b24/20211227_182414.jpg Research Blog - Churchill Sea Ice Field Campaign - Make it stand out John Yackel rides the (switched-off) radar as we traverse a frozen lake. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/93e235e5-eb94-4274-b082-86303919a0bd/pits.jpg Research Blog - Churchill Sea Ice Field Campaign - Make it stand out Vishnu Nandan and John Yackel dig a snow pit. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/26dad3af-2244-4a07-8971-4dc05d811bf2/20211227_184240.jpg Research Blog - Churchill Sea Ice Field Campaign - Make it stand out Rosie Willatt about to sample some very dense snow over lake ice. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1daa8dc0-a11a-4758-a937-9e203c27171a/group_pic.jpg Research Blog - Churchill Sea Ice Field Campaign - Make it stand out The team, from left to right: Tom Newman, David Jensen, Brian Gulick, John Yackel, Julienne Stroeve, Erica Rosenblum, Vishnu Nandan, Monojit Saha, Rosie Willatt, Robbie Mallett https://www.robbiemallett.com/researchblog/2021/12/23/the-cop26-cryosphere-pavilion monthly 0.5 2021-12-23 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/30294a63-eb59-45fb-b59d-ad4092b61570/cop1.jpeg Research Blog - The COP26 Cryosphere Pavilion - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/d9c2f0bb-c350-43a0-ae48-f32561c5b244/cop2.jpeg Research Blog - The COP26 Cryosphere Pavilion - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.robbiemallett.com/researchblog/2020/12/7/a-dual-frequency-radar-on-the-mosaic-ice-floe monthly 0.5 2020-12-07 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1607336473249-CH22PLS4EIZIL0RVRN7E/CryoSat_pillars.jpg Research Blog - A dual-frequency radar on the MOSAiC ice floe CryoSat-2 monitors Arctic sea ice thickness in the polar winter, even through clouds. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1607337508571-YH6WH51GFAMOW3J7EDSH/howell_CL.jpg Research Blog - A dual-frequency radar on the MOSAiC ice floe The same sea ice viewed at different radar frequencies (from Howell et al., 2018). Different images are obtained from viewing the same scene in different frequency bands. Some sea ice movement has occurred between the two satellite overpasses. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1607337777830-MUCXS12J1C7IAG60S8RJ/kuka.png Research Blog - A dual-frequency radar on the MOSAiC ice floe The KuKa radar instrument was capable of viewing the snow at a variety of angles (scatterometer mode). It was also capable of ‘staring’ down at the snow while being towed along by a snowmobile. Photographs from Stefan Hendricks, displayed in Stroeve et al. (2020; The Cryosphere). https://www.robbiemallett.com/researchblog/2020/3/5/the-sixth-snow-science-winter-school-in-col-du-lautaret-france monthly 0.5 2020-04-23 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583428803992-J37Y5B5UZNFEX7XXQ6DB/IMG_3802.JPG Research Blog - The Sixth Snow Science Winter School in Col du Lautaret, France Henning Lowe (SLF) inspects a 2.60m snow pit on the morning of day one. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583429181572-VHFRRSU646H79UWDMUIB/IMG_3869.jpg Research Blog - The Sixth Snow Science Winter School in Col du Lautaret, France Zac Provant (U. Oregon) records the temperature profile in a snow pit https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583429319378-VRZU8ARRKIF20BUDCVQS/IMG_3863.jpg Research Blog - The Sixth Snow Science Winter School in Col du Lautaret, France My team about to fill in our pit on the final field day. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583429465640-AKNWZ7WB0NQ97I4GDOXL/IMG_3838.JPG Research Blog - The Sixth Snow Science Winter School in Col du Lautaret, France Anna Karpova (SLF) weighing a snow sample in cold conditions https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583429864810-NCMTTCV18DTBQOCZ6AL8/WhatsApp%252BImage%252B2020-02-19%252Bat%252B20.24.08.jpg Research Blog - The Sixth Snow Science Winter School in Col du Lautaret, France Somebody has to sit and write down all the measurements, even when it’s cold and snowing. Photo: Marie Dumont https://www.robbiemallett.com/researchblog/2020/3/3/growing-sea-ice-hundreds-of-miles-from-the-sea monthly 0.5 2020-03-04 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583324592839-RYZU9WYQCC5SG6ASWXCA/image-asset.jpeg Research Blog - Growing Sea Ice Hundreds of Miles from the Sea Sunset at SERF. Two radar instruments overlook the tank and take automated measurements every eight minutes. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583322140484-KKKG6HVB5ONYIFRNN3PY/20200206_164336.jpg Research Blog - Growing Sea Ice Hundreds of Miles from the Sea The view from the SERF office of a high-tech radar and a low-tech human. Photo: Rosemary Willatt https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583322699590-L7LFJBSOOJFV4HBK99PF/20200209_074733.jpg Research Blog - Growing Sea Ice Hundreds of Miles from the Sea Snow falls in large, highly complex shapes. The grains we saw sometimes exceeded 5mm in diameter, making them extremely difficult to model. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583322577155-XYLI3YURA6CHVU7UG5FZ/20200207_085539.jpg Research Blog - Growing Sea Ice Hundreds of Miles from the Sea Sampling the surface of the ice with a chisel. Photo: Rosemary Willatt, CPOM UCL. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583322781886-NESAFI637KS63Y8YZWQD/IMG_3729.jpg Research Blog - Growing Sea Ice Hundreds of Miles from the Sea Rosie drills an ice core near the edge of the tank. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583323073565-JFZTJQ7021NEL9TN6S09/IMG_3760.jpg Research Blog - Growing Sea Ice Hundreds of Miles from the Sea Chris Fuller downloads data from the C-band radar instrument. https://www.robbiemallett.com/researchblog/2019/12/3/learning-on-the-job-uk-graduate-students-join-the-largest-arctic-expedition-in-history monthly 0.5 2020-01-09 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1575376135960-W2LJAJKIQEAG6L2GWQ3G/NERC1.jpg Research Blog - Learning on the Job – UK graduate students join the largest Arctic expedition in history. A Russian Mi-8 helicopter returns from a remote deployment as scientists work below. Photo by Sam Cornish. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1575376242129-KFFQR55GYRESOM9JLH9C/NERC2.jpg Research Blog - Learning on the Job – UK graduate students join the largest Arctic expedition in history. An armed polar bear guard keeps watch from a section of rough ice. On that day the sun would not appear above the horizon, leaving only a few hours of orange light to work in. Photo by Sam Cornish. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1575376655912-97TM0T0VUOJEXB6XH8UE/NERC4.jpg Research Blog - Learning on the Job – UK graduate students join the largest Arctic expedition in history. Scientists peer down at the fractured ice as Fedorov and Polarstern rendezvous to exchange equipment and personnel. Photo by Sam Cornish. https://www.robbiemallett.com/researchblog/2019/9/12/so-you-dont-want-to-be-eaten-by-a-polar-bear-flares-and-firearms-in-svalbard monthly 0.5 2019-11-05 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1568296184376-XUQ2K04UI4TUGVZ3ODSS/Polar_Bear_-_Alaska_%2528cropped%2529.jpg Research Blog - So you don’t want to be attacked by a polar bear: Flares and firearms in the field https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1568296372603-B4PTXW7ZUI6HCRBRZ73M/record_bear.jpg Research Blog - So you don’t want to be attacked by a polar bear: Flares and firearms in the field https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1572963894968-R3W6VF8EDNFPZNSS683R/canisters.jpg Research Blog - So you don’t want to be attacked by a polar bear: Flares and firearms in the field “Bear canisters” reduce but do not eliminate the risk of attracting bears with food odours. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1572962688585-KTK86LADNMGF83WOUP3D/half_load_bright.jpg Research Blog - So you don’t want to be attacked by a polar bear: Flares and firearms in the field Robbie half-loading a rifle at the edge of the Ny-Ålesund safe zone. Photo: Aurelia Reichardt (BAS) https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1568295525617-9S94SS0HAT3IQ1C0JCX7/Sophie_Watson.jpg Research Blog - So you don’t want to be attacked by a polar bear: Flares and firearms in the field - Sophie Watson Sophie Watson is a PhD student at Cardiff University School of Biosciences. Her project investigates how the gut microbiota of polar bears and wolverines are influenced by changing climatic and anthropogenic stressors, including changes in land use, parasite diversity/load and contaminant accumulation. Sophie tweets @watsonse1 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1568296651146-YISKOI4VSMLIUM7CWPYX/mallett_robbie.jpg Research Blog - So you don’t want to be attacked by a polar bear: Flares and firearms in the field - Robbie Mallett Robbie Mallett is a PhD student at the Center for Polar Observation and Modelling at University College London. His work concerns the distribution and impact of snow on Arctic sea ice, particularly with respect to measurements of sea ice thickness from space Robbie tweets @robbiemallett https://www.robbiemallett.com/researchblog/2019/9/19/mosaic-a-year-long-city-on-sea-ice monthly 0.5 2019-10-31 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1568934800490-U6LDCU4M57VX3ZJH5IOT/polarstern2.jpg Research Blog - MOSAiC: A Year-Long City on Sea Ice German icebreaker RV Polarstern will form the centerpiece of the drifting climate observatory. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1568934929377-ZWNPBXXRC1WLXLN82XNC/numbers.jpg Research Blog - MOSAiC: A Year-Long City on Sea Ice MOSAiC has taken most of a decade to plan and prepare for. It represents the largest expedition to the central Arctic in history (by some margin!) https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1568934456038-WCXJ2Z36925RES8HBSZN/tempchange.jpg Research Blog - MOSAiC: A Year-Long City on Sea Ice Observed change of temperature 1970 – 2017 [Degrees C]. The Arctic region has experienced unparalleled warming in recent years. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1568934599544-DJWF8RH0QNUFIZ7V6JXP/baloon.jpg Research Blog - MOSAiC: A Year-Long City on Sea Ice A MOSAiC researcher practices with a tethered weather observation balloon in Svalbard https://www.robbiemallett.com/researchblog/2019/8/23/americas-next-top-modellers-two-weeks-of-climate-science-at-ncar-colorado monthly 0.5 2024-12-04 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1566562511357-V3RIBYYSR6JF4A930C47/cheyenne.jpg Research Blog - America’s next top modelers: two weeks of climate science at NCAR, Colorado. Cheyenne was ranked as the 40th most powerful supercomputer in the world by TOP500 in June 2019. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1566562670671-7060GJLER5HH39ZG7458/mesa.jpg Research Blog - America’s next top modelers: two weeks of climate science at NCAR, Colorado. The Mesa Lab sits on a small plateau at the foot of the Rocky Mountains looking over Boulder https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1566563800145-8FFPSOQJTG0ATBL2XL7Y/cesm2.png Research Blog - America’s next top modelers: two weeks of climate science at NCAR, Colorado. Schematic of the earth systems coupled together in CICE v2 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1566562793322-0K3SVDHXJBRSH0D5RLCB/tutorial.jpeg Research Blog - America’s next top modelers: two weeks of climate science at NCAR, Colorado. Keith Oleson helps tutorial students run CESM. Photo: @NCAR_CGD https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1566564612595-7EYSTWV0ZKW64U0WTKAG/hike.JPG Research Blog - America’s next top modelers: two weeks of climate science at NCAR, Colorado. An opportunistic evening hike up the Bear Creek trail. Photo: Adi Nalam https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1566562974115-7IH3K3059IXMIST8V5YY/groupphoto.jpeg Research Blog - America’s next top modelers: two weeks of climate science at NCAR, Colorado. NCAR 2019 Polar Modeling Workshop participants and organizers. Photo: David Bailey/ Todd Amodeo https://www.robbiemallett.com/researchblog/2019/6/25/lasers-in-space-nasas-icesat-2-satellite-counts-photons-from-orbit monthly 0.5 2025-04-10 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1561498458039-HDRQ8Z5LK9VH14X6WBMB/group_photo.jpg Research Blog - Lasers in space - NASA's ICESat-2 Hack Week in Seattle https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1561498563021-C7APKB2VK6SCRFVSV4MT/poster.jpg Research Blog - Lasers in space - NASA's ICESat-2 Hack Week in Seattle https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1561499067155-2IGNFVOX8VG5H6MZB7QX/plot.jpg Research Blog - Lasers in space - NASA's ICESat-2 Hack Week in Seattle Eric Keenan’s (@EricKeenanCU) plot of blowing snow optical depth over Antarctica. The optical thickness is higher over East Antarctica (figure right) in agreement with published work. https://www.robbiemallett.com/researchblog/2019/5/28/antarctic-sea-ice-in-bern monthly 0.5 2025-04-10 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1559031386926-JAI6L6Z371ANYM4RWVCO/sea_ice_anoms.png Research Blog - Five days of Antarctic sea ice in Bern While Arctic sea ice extent has declined sharply with global warming, Antarctic sea ice extent has slightly increased. Plot credit: Zeke Hausfather, Yale Climate Connections https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1559031630378-5DBD51CFPNEZBR7NJWTR/comparison.jpg Research Blog - Five days of Antarctic sea ice in Bern Antarctic sea ice surrounds an island, whereas Arctic sea ice is largely enclosed by continents. Figure shows northern hemisphere summer sea ice extent, so Arctic sea ice coverage is anomalously low and Antarctic coverage is anomalously high. Figure credit: NASA Global Climate Change Blog https://www.robbiemallett.com/researchblog/blog-posts monthly 0.5 2025-10-27 https://www.robbiemallett.com/walking-the-aral-desert daily 0.75 2020-03-05 https://www.robbiemallett.com/walking-the-aral-desert/2020/3/5/building-a-trolley monthly 0.5 2020-03-05 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583419094541-4GDZP6GDHUW2IVQ8RR7A/WhatsApp+Image+2020-03-04+at+16.14.02.jpeg Walking the Aral Desert - Building A Desert Trolley https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583419094697-SR8S4MHWW4MEYMMBXZA7/WhatsApp+Image+2020-03-04+at+16.14.03.jpeg Walking the Aral Desert - Building A Desert Trolley https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583419096812-N743J16FF0FM85KI8AGJ/WhatsApp+Image+2020-03-04+at+16.14.04.jpeg Walking the Aral Desert - Building A Desert Trolley https://www.robbiemallett.com/walking-the-aral-desert/2020/3/5/what-does-it-take-to-cross-the-youngest-desert-on-earth monthly 0.5 2020-03-05 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1583419300157-EVINPX1ZMA9W1KZT78ZH/Aral_sat_snapshot.jpeg Walking the Aral Desert - What does it take to cross the youngest desert on earth? Satellite image of the dried up Aral sea on 4th March, 2020 https://www.robbiemallett.com/carboncanoe daily 0.75 2025-11-10 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1480445785596-4DETAN2XNFJOP2B4CXTK/Joinup.JPG My Carbon Canoe: Design and Build https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1480458154667-BNYB819WO233ZW3DMUGB/3D.JPG My Carbon Canoe: Design and Build https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1480458154749-5F7IMQBDYG3NBX3X3ZCS/Joinup.JPG My Carbon Canoe: Design and Build https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1480458155525-ICSLQEFC1QJ6AZVNAV9U/Profile.JPG My Carbon Canoe: Design and Build https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1480458155053-NFBG0LVQNX1TBGGWQ01Y/Tidy+Section.png My Carbon Canoe: Design and Build https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1480699664430-OGDFQJYXTOG1ZGX8SDJ7/Sections.jpg 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https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1488020472957-639KQUQPKLJCPYUGTIGM/Sitting.jpg My Carbon Canoe: Design and Build https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1762791152811-L8JXO7CIOL91EDLPVXYC/thames_barrier_canoe.jpg My Carbon Canoe: Design and Build https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1762791755156-WWS6ZYNSSHC7EW85QKAS/TE.png My Carbon Canoe: Design and Build https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1762791201014-3Q54XALJGWMBGAPB133E/dover.jpg My Carbon Canoe: Design and Build https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1762791223274-WG3DXD428FUTORV3KDD5/france.jpg My Carbon Canoe: Design and Build https://www.robbiemallett.com/portfolio daily 0.75 2017-02-28 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1488307552341-R0LO0XW4S3QYPPZMMSFR/Will+Walking.JPG photography 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https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1488307987306-Y8X6T6M6I08KLEKBOTQL/6U5A5730.jpg photography https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1488308048642-ZKFEXAMG5DZOVGPUG8ID/DSC_0291.jpg photography https://www.robbiemallett.com/politicians-tweet-climate daily 0.75 2018-12-28 https://www.robbiemallett.com/home daily 1.0 2026-02-13 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1726654035526-08UMMB0J52BAXCB7QXF0/snowmob.jpeg Home https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/93c8b035-dbc8-4029-9eaa-1e9c40f859fb/pyramid.jpg Home - About me Find out about me and my interests! https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/c14a7975-6972-4952-8d61-094485175770/kneeling.jpg Home - My Research blog Find out about my research on sea ice. I use field observations and satellite data to learn about how polar snow affects the atmosphere above and the ice below. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/2e158016-cccb-481e-9a3c-a355a81de74a/tobler_cropped.jpg Home - slides & Lectures A catalogue of slides for lectures, talks and presentations I’ve given. Sometimes accompanying videos are available. https://www.robbiemallett.com/about daily 0.75 2025-03-17 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1611500319753-R5K93DJV3J3JV8SYY7UZ/5.jpg About Me https://www.robbiemallett.com/lagrangian-modelling-of-sea-ice daily 0.75 2024-11-05 https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1588525981828-BH4PZS3ZHUCWTYEQ6Y9W/animation-optimized2.gif Lagrangian Modelling of Sea Ice The modelled evolution of snow depth on a selection of virtual ice floes for the cold season, 2016. Day 1 represents 1st September. One in every 25 ice parcels is shown. Parcels are spawned as open ocean freezes or existing ice diverges. Partials present on model initialisation (1st September) are given a snow depth from Warren et al. (1999), otherwise they are initialised with a 1cm ‘surface scattering layer’. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1588545998696-VPC98QYY3CWN554YZBZL/Screenshot+from+2020-05-03+23-38-36.png Lagrangian Modelling of Sea Ice Plot from Rostosky et al. (2018) of the gradient ratio against snow depth as measured by Operation Ice Bridge. A clear correlation, but not a tight fit. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1588544659595-QWSH2IAHK38H5492R0EL/track_1151_GS.png Lagrangian Modelling of Sea Ice The evolution of snow grain shapes on an example virtual floe. Turquoise base layer is the ice surface, red represents melt forms, grey faceted grains, light green fresh snow, dark green wind slab, blue depth hoar and pink rounded grains. Snow height axis shifted by 400cm. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1588544717614-NUVSE8IOI1C0NI2DKEWK/grain+diameter.png Lagrangian Modelling of Sea Ice Modelled evolution of typical grain diameter. A layer of thick grains (dark blue) develops after a warm period in this floe (trajectory plotted below), which may drive strong microwave scattering effects. Snow height axis shifted from the waterline by 400 cm. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1591818505315-XRJNGHEVUU2RK4RGYU39/multiplot_converted.gif Lagrangian Modelling of Sea Ice The evolution of six model variables, but these results are very preliminary! Ice thickness is not (yet) responsive to ridging and rafting so is significantly underestimated. The 37 and 19 GHz brightness temperatures are those of the parcels themselves - not of a modelled satellite footprint which will also contain open water. https://images.squarespace-cdn.com/content/v1/583b238559cc68566bf25e2d/1591819060268-O6GICQXWJJBSAYH42FXG/tracks.gif Lagrangian Modelling of Sea Ice A visualisation of one in every thirty tracks, with each track’s ‘tail’ thirty days long. 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