Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 08/10/2026Today, we are wrapping up the annual meeting for the @icelink-project.bsky.social project here in Reykjavik 🇮🇸🇬🇱🧊 141
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 06/10/2026We’re hiring! ❄️ Two-year postdoc in Satellite Glaciology at DTU Space’s Cryosphere Research Group, working on SWOT-ICE, funded by the VILLUM FONDEN Experiment Programme. Apply and read more here: efzu.fa.em2.oraclecloud.com/hcmUI/Candid... #Glaciology #RemoteSensingefzu.fa.em2.oraclecloud.comPostdoc in Satellite Glaciology - DTU SpaceDTU Space is looking for a postdoc repurposing the SWOT (Surface Water and Ocean Topography) satellite mission to detect subtle ice sheet elevation changes caused by meltwater moving through the ice s... 055
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 01/10/2026Can a satellite built to measure changes in ocean and river water levels also reveal meltwater's hidden pathways deep beneath the Greenland Ice Sheet? ❄️ Happy to share that Senior Researcher Mai Winstrup has received a grant from @VILLUMFONDEN to investigate exactly this! 121
Natalia Havelund @nataliahavelund.bsky.social · 21/08/2026Our new paper on monitoring Greenland Ice Sheet surface elevation change from CryoSat-2 is out! 🛰️❄️ We developed a new state-space modelling framework to create continuous monthly records of how the ice-sheet surface is changing. You can read more about the study in ESA’s post below 👇 051
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 08/06/2026For the second year, our group has joined the national Vi Cykler Til Arbejde #vcta (We Bike to Work) campaign in the month of May! 🚴♂️🚴♀️💨💨 Our "Polar Pedalers"❄️🥶 team biked 166 days and 2767 kilometers with Anna and Kirk leading the team in total bike days and bike kilometers! 062
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 22/05/2026Excited to share 📄✨ our new paper on #Sentinel-3 radar over the #GreenlandIceSheet - accepted in #IEEEJSTARS & out as a preprint: ieeexplore.ieee.org/document/115... 🔍 It started with an unusual signal: very low radar backscatter in N Greenland (summer 2023)…ieeexplore.ieee.orgRegional Differences in Sentinel-3 Radar Backscatter over Greenland and its Impact on Ice Sheet Altimetry ApplicationsSatellite radar altimetry operating at Ku-band has provided crucial observations of ice sheet elevation change for more than three decades, offering a direct means to assess climate impacts. Surface h... 142
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 19/05/2026Kicked off May at #EGU26 in Vienna - a week packed with talks, posters & inspiring discussions. Back in the office full of fresh ideas 💡 - and thanks to sunny weather + rental bikes, the #BikeToWork #VCTA streak rolled on even from Vienna 🚴♀️ #PolarPedalers 0103
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 29/04/2026#DTUSpace contributes to monitoring ice sheet elevation change of the Greenland Ice Sheet 🧊❄️ Surface lowering means the ice sheet is losing mass through melt and faster glacier flow, contributing to further Arctic warming. Due to its proximity, it affects the climate of the European continent 🔥 174
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 27/04/2026🧊 New paper out from the ESA CCI Sea Ice project led by DTU cryo. Advancing the use of independent, non‑satellite observations to validate satellite‑derived sea‑ice thickness - while tackling representativeness and uncertainty head‑on. 👏 @spacehsk.bsky.social, @reneefredensborg.bsky.social 032
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 22/04/2026We are a scientific partner of the SILA Greenland Mission 2026 with IMAQA ❄️ Using ski kites, the expedition will traverse the Greenland Ice Sheet from South to North and collect GNSS elevation data on behalf of DTU Space 🔗 www.imaqa.be/sila Sila means both weather and state-of-mind in Kalaallisut 🇬🇱 032
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 13/04/2026Just before Easter, Stine and Mary attended the 9th Sentinel Validation Team meeting, hosted by @esaearth.esa.int and @eumetsat.int in Frascati, Rome Great discussions on ice sheet products and multi-sensor synergy. We can't wait for the upcoming #Sentinel‑3C launch and tandem phases 🚀🧊 #Sentinel3 031
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 30/03/2026@louisesandbergs.bsky.social and @nataliahavelund.bsky.social attended the CCI colocation meeting last week. There were many important discussions on the future of the programme. Thanks for having us! 042
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 26/03/2026🚨 Applications open! Join us for The Polar Climate Space: a week‑long #hackathon (24–30 Aug) bringing together #ECRs to tackle #Arctic & #Antarctic challenges using #EO, #climate models, in‑situ data & #ML. More info below! 👉 ECR form: tinyurl.com/ycy57mvj 👉 Senior scientists: tinyurl.com/2p9tv992 044
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 27/03/2026Excited to kick off ESA’s HARMONY Validation Concept Consolidation & Verification Methodology project, managed by CLS. Proud to lead land ice calibration & validation planning. DTU team: Kristina, Sebastian & Stine. Harmony (launch in 2029) will advance insights into land deformation & glaciers 031
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 23/03/2026Big congrats to Anna for defending her PhD on surface mass balance using EO data 👏🎓✨ And of course, the celebration included a proper cake with P H D spelled out on top 🎂 #PhD #PhDDefense #SurfaceMassBalance #EarthObservation #Cryosphere 083
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 12/03/2026❄️Theory and practice❄️ (Part 2) This week in Sisimiut we continue our Extreme Climate and Physical Nature course on the Arctic Semester by diving into snow physics. After covering the theory, students headed into the field to explore the snowpack firsthand. #CryoTeaching #ArcticDTU #SnowScien 173
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 10/03/2026New paper alert! 📄 How do Arctic tundra landscapes develop after a wildfire? 🔥 Using high-resolution lidar DEMs and a space-for-time approach, @tabea-rettelbach.bsky.social examined how ice-wedge polygon terrain in Alaskan permafrost landscapes changes following a fire. doi.org/10.1088/1748... 172
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 23/02/2026Our PhD Student @mikkelaabykruse.bsky.social is currently getting a taste of what it is like to do fieldwork in the Arctic at The University Centre in Svalbard (UNIS)❄️🥽 🧤 Working on a glacier is no safe or easy task, and UNIS is a great place to learn the ropes of what it means to be a glaciologist! 064
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 04/03/2026❄️Theory and practice❄️ In Sisimiut, Greenland, we teach a DTU course called Extreme Climate and Physical Nature on the Arctic Semester. Earlier this week 30+ students practiced drilling in the ice on the lake in the center of town after learning the theory last week. #CryoTeaching #ArcticDTU 054
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 18/02/2026🚀 Excited for Copernicus @esa.int #CRISTAL! This mission’s dual‑freq Ka/Ku #altimeter aims to measure snow depth on sea ice. A new UiT‑led study (feat. @reneefredensborg.bsky.social) explores current laser/radar data + simulates CRISTAL waveforms. Check it out ➡️ tc.copernicus.org/articles/20/... ❄️🧊tc.copernicus.orgAnticipating CRISTAL: an exploration of multi-frequency satellite altimeter snow depth estimates over Arctic sea ice, 2018–2023Abstract. The EU and ESA plan to launch a dual-frequency Ku- and Ka-band polar-orbiting synthetic aperture radar (SAR) altimeter, the Copernicus Polar Ice and Snow Topography Altimeter (CRISTAL), by 2... 054
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 04/02/2026One year into the ESA Digital Twin (DT) Earth Ice Sheets project ❄️@eo4cryo.bsky.social and @tabea-rettelbach.bsky.social with other @esa.int DTs at the science meeting in Frascati to present the pre-operational dtc-ice-sheets.org & new ideas for holistic data cubes 🛰️🌐 #DigitalTwinEarth #IceSheets 073
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 28/01/2026🍾🥂One of our most exciting pieces of news this month must be the hand-in of Anna Puggaard's PhD thesis on "Earth observation for surface mass balance" on January 15, celebrated with cake and bubbles! We look forward to seeing her in the office as a postdoc in February, after a well-deserved break! 🏝️ 063
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 13/01/2026📢 Going to #EGU26? Do you work with #radars on icy and rocky surfaces? ➡️Look no further! Submit an abstract to this session, convened by our @kirkscanlan.bsky.social and @reneefredensborg.bsky.social with Hameed Moqadam! The deadline is fast approaching ⌛ - submit by 15 January 2026 at 13:00 CET! 032
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 09/01/2026Great to be at the 2026 Greenland Ice Sheet Seminar at the Niels Bohr Institute with cryosphere colleagues. Photo: @kirkscanlan.bsky.social presenting for DTU Space. #GreenlandIceSheet #Cryosphere #DTUSpace 052
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 09/12/2025Our colleague @tabea-rettelbach.bsky.social is developing dynamic data cubes for #EO data over ice sheets (literally 🧊). The goal is to make complex geospatial datasets easier to find, access, and use for e.g. modelers. #datacubes @icelink-project.bsky.social #PISCO #DTC_icesheets 064
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 02/12/2025It may be difficult for the untrained eye to see - but we were of course dressed in the colors of glaciers at last weeks Christmas party at DTU Space🧊❄️🎄 0115
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 06/11/2025Rasmus and @tabea-rettelbach.bsky.social are in Budapest this week at HungaroMet for the PISCO & @polarres.bsky.social hackathon! 🇭🇺 With 20 other students and instructors, they’re exploring projects that combine climate model outputs with in-situ and EO data to better understand our Polar regions.🌍❄️ 054
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 03/11/2025Last week we attended DTU Project Day and had great conversations with many interested students about potential new projects 🛰️❄️ #DTU #ProjectDay #StudentProjects #Research #Cryosphere #RemoteSensing #IceSheets 041
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 31/10/2025We’re attending the IGS Nordic Branch Meeting 2025 in Copenhagen, at GEUS. Great to meet colleagues, hear exciting talks, and spark new discussions on ice, climate and modelling ❄️🧊📊 #Cryosphere #Glaciology #ClimateScience #IceSheet #PolarResearch #NordicScience #IGS2025 183
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 27/10/2025DTU Space was at the Danish Climate Science Symposium 2025 🇩🇰 We’re shared a handful of posters and a talk by Sebastian B. Simonsen: “From Satellites to Digital Twins – Monitoring the Greenland Ice Sheet.” Great discussions on climate, ice, and models! ❄️ #DTUSpace #Greenland #Cryosphere #DMI 073
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 20/10/2025📢 New publication! Ahead of #ESA #CRISTAL, we explore dual-frequency #altimetry for estimating 🧊 snow depth over sea ice. 🛩️ Part 1: Airborne multi-freq altimetry → snow depth 👉 tc.copernicus.org/articles/19/... 🛰️ Part 2: Compare w/ CryoSat-2 & ICESat-2 #CRYO2ICE 👉 tc.copernicus.org/articles/19/...tc.copernicus.orgMulti-frequency altimetry snow depth estimates over heterogeneous snow-covered Antarctic summer sea ice – Part 1: C∕S-, Ku-, and Ka-band airborne observationsAbstract. The recent alignment of CryoSat-2 to maximise orbital coincidence with the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) over the Southern Ocean and Antarctica in July 2022, known as... 154
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 03/10/2025Antarctica is undergoing “greenlandification,” with ice loss processes mirroring Greenland ❄️🌍 New paper out in Nature Geoscience with DTU Space contributions on key signs: doi.org/10.1038/s415... #ClimateChange #Antarctica #Greenlandificationdoi.orgThe Greenlandification of Antarctica - Nature GeoscienceClimate and ice sheet processes in Antarctica increasingly reflect those observed earlier in Greenland. Applying process insights from Greenland can improve projections of future Antarctic ice and climate behaviour. 0138
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 22/09/2025Last week, @eo4cryo.bsky.social and @spacehsk.bsky.social were in Iceland and NE Greenland on an airborne #FieldCampaign sampling key data over #SeaIce and #LandIce with a brand-new instrument #CRISTALair🛩 Cutting-edge science in action, unlocking insights for future satellites🛰 #EarthObservation 1114
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 12/08/2025📢 A new study pinpointing 📌 differences in RCM melt extent using observations from ASCAT 🛰️ is out! Led by our PhD student Anna Puggaard with @louisesandbergs.bsky.social, @eo4cryo.bsky.social and colleagues from @dmidk.bsky.social, GEUS and ENVEO. Interested? See ➡️ tc.copernicus.org/articles/19/...tc.copernicus.orgBias in modeled Greenland Ice Sheet melt revealed by ASCATAbstract. The runoff of surface melt is the primary driver of mass loss over the Greenland Ice Sheet. An accurate representation of surface melt is crucial for understanding the surface mass balance a... 073
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 25/08/2025Congratulations to DJ Upside Down Turtle and DJ Disco Disc for their triumph in the inaugural Cryosphere Group Disc Golf Championship! 🥳🥳 A lovely afternoon spent with great colleagues and only "a few" discs had to be dug out of trees or fished out of water. Time to start practicing for next year 🙃 062
Reposted by Natalia HavelundKirk Scanlan @kirkscanlan.bsky.social · 08/08/2025Better late than never. Big thanks to @anja-ruti.bsky.social and @eo4cryo.bsky.social for all their help as we try to unravel #Greenland Ice Sheet surface roughness from radar altimetry. Hat tip to the @esa.int Living Planet Fellowship program for supporting this work! doi.org/10.5194/tc-1...doi.orgGreenland Ice Sheet surface roughness from Ku- and Ka-band radar altimetry surface echo strengthsAbstract. Surface roughness is an important factor to consider when modelling mass changes at the Greenland Ice Sheet (GrIS) surface (i.e., surface mass balance, SMB). This is because it can have impo... 0102
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 25/06/2025Happy to be at #lps25 !! 🛰️ 092
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 19/06/2025🛰️Will we see you at the #LPS25? 🌎 If you're heading to the Living Planet Symposium in Vienna next week, let us know – we would love to connect! ❄️ Have a look at the following posts about where you will find us and what we will be presenting during the week! 193
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 04/06/2025We should learn from TU Delft! The PhD-defense at DTU would be more festive with this amazing dresscode 🎓 #DTUfashion #LoveHats 083
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 28/05/2025We just wrapped up an inspiring session in our #Geodesy and #EO division! 🌍 Everyone had 4 minutes to share what they’re working on. In just one hour, we gained a fresh view of projects and research. It wasn’t easy sticking to the time limit, but that challenge made the stories even more engaging 🚀 052
Reposted by Natalia HavelundDTU Cryosphere group @dtucryo.bsky.social · 13/05/2025@polarportal.bsky.social is getting an update! We have provided the Greenland Ice Sheet mass budget from GRACE and GRACE-FO 063