Renée M. Fredensborg Hansen
reneefredensborg.bsky.social
Renée M. Fredensborg Hansen
@reneefredensborg.bsky.social
Sea ice scientist | Postdoc @ DTU Space and @ University of Calgary | Multi-frequency altimetry over snow-covered sea ice | All views are my own.
Reposted by Renée M. Fredensborg Hansen
📢 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!
Heading to #EGU26 and use #radar to study terrestrial and planetary surfaces (both icy and rocky 🤯)? Have we got the session for you!

Consider submitting an abstract to #EGU26 CR6.3 by January 15 2026.

Read more about the session here www.egu26.eu/session/56853

Hope to see you there!
January 13, 2026 at 3:01 PM
Reposted by Renée M. Fredensborg Hansen
Heading to #EGU26 and use #radar to study terrestrial and planetary surfaces (both icy and rocky 🤯)? Have we got the session for you!

Consider submitting an abstract to #EGU26 CR6.3 by January 15 2026.

Read more about the session here www.egu26.eu/session/56853

Hope to see you there!
December 4, 2025 at 1:58 PM
Reposted by Renée M. Fredensborg Hansen
🌟Meet our Group🌟
@mikkelaabykruse.bsky.social is a PhD student in the Cryo Group. He uses satellite remote sensing to study lakes hidden beneath the Greenland Ice Sheet 🛰️🧊🌊 Some of these lakes can contain and later release enormous amounts of meltwater. #Cryosphere #RemoteSensing #Greenland
January 9, 2026 at 3:29 PM
Reposted by Renée M. Fredensborg Hansen
Great 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
January 9, 2026 at 7:35 PM
To round off the year and just before Christmas, I had the amazing opportunity of spending the last week in Calgary, Alberta, meeting my colleagues at @ucalgary.bsky.social while participating in the ArcticNet's Annual Science Meeting #ASM25, and presenting my #MEOPAR funded project #SNOWMASS ❄️🛩️🛰️! ➡️
ArcticNet's Annual Scientific Meeting (ASM) 2025
Join ArcticNet's Annual Scientific Meeting (ASM) 2025, December 15-18, 2025. Learn more on Fourwaves.
event.fourwaves.com
December 21, 2025 at 2:51 PM
Reposted by Renée M. Fredensborg Hansen
Rasmus 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.🌍❄️
November 6, 2025 at 1:01 PM
Reposted by Renée M. Fredensborg Hansen
It 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🧊❄️🎄
December 2, 2025 at 8:54 AM
Reposted by Renée M. Fredensborg Hansen
Our office is now ready for Halloween 🎃 🎃
October 20, 2025 at 7:55 PM
Reposted by Renée M. Fredensborg Hansen
DTU 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
October 27, 2025 at 8:26 AM
Reposted by Renée M. Fredensborg Hansen
We’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
October 31, 2025 at 7:46 AM
Reposted by Renée M. Fredensborg Hansen
📢 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/...
Multi-frequency altimetry snow depth estimates over heterogeneous snow-covered Antarctic summer sea ice – Part 1: C∕S-, Ku-, and Ka-band airborne observations
Abstract. 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...
tc.copernicus.org
October 20, 2025 at 8:37 AM
Reposted by Renée M. Fredensborg Hansen
We’re the Cryosphere Research Group at DTU Space, studying the polar regions using satellite remote sensing. We monitor and map changes in snow & ice, assess polar climate change impacts, and provide data to imporve polar climate models. Follow for polar science insights! ❄️#Cryosphere #PolarResearch
September 26, 2024 at 11:30 AM
Reposted by Renée M. Fredensborg Hansen
We are proud to be contributors to a chapter on Arctic land ice and its changes in the #AMAP Assessment Report 2026!❄️

#AMAP (Arctic Monitoring and Assessment Programme) is the working group under the #ArcticCouncil that produces science-based assessments to inform policy and decision-making ❄️
October 6, 2025 at 7:36 AM
Reposted by Renée M. Fredensborg Hansen
Antarctica 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 #Greenlandification
The Greenlandification of Antarctica - Nature Geoscience
Climate 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.
doi.org
October 3, 2025 at 12:11 PM
Reposted by Renée M. Fredensborg Hansen
🌍✨Great energy at DTU Space with a visit from Unge GIS Brugere!

Yesterday, we welcomed GIS users to #DTUSpace. The visit focused on spatial data from #EarthObservations and methods for tackling geospatial challenges, highlighting the importance of precise geospatial data in the Arctic and beyond 🌍❄️
October 1, 2025 at 8:50 AM
Reposted by Renée M. Fredensborg Hansen
Last 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
September 22, 2025 at 11:35 AM
Reposted by Renée M. Fredensborg Hansen
Congratulations to Behzad Forouzi Feshalami for defending his PhD thesis: "Numerical modeling of wave-induced erosion of floating icebergs" - a valuable contribution to improving our understanding of ice–ocean interactions! 🌊🧊

In collaboration with #NTNU, supervised by @spacehsk.bsky.social 🎓
September 26, 2025 at 12:58 PM
Reposted by Renée M. Fredensborg Hansen
Presentation - Session 9: Cryosphere Altimetry Calibration/Validation I

S9-28: Operational Fiducial Reference Measurements over Sea Ice in support of Sentinel-3 validation (ESA St3TART-FO project) 🛰️🛩️❄️🧊 #St3TART-FO
September 29, 2025 at 7:58 AM
Reposted by Renée M. Fredensborg Hansen
Presentation - Session 9: Cryosphere Altimetry Calibration/Validation I

S9-14: Validation Methodologies for CRISTAL In-Flight Level-2 Land Ice Products – An Overview from the CRISTAL IN-PROVA Project 🛰️🛩️❄️ #IN-PROVA

Suggestions for #CRISTAL validation? Submit here ➡️ forms.office.com/e/LkSrJnPFTh
September 29, 2025 at 7:58 AM
Reposted by Renée M. Fredensborg Hansen
Presentation - Session 10: Cryosphere Altimetry Calibration/Validation II

S10-33: Dual-hemisphere Sea Ice Reference measurements from multiple data sources tailored for evaluation and product inter-comparison of satellite altimetry 🛩️❄️🧊 #CCI

Interested? essd.copernicus.org/preprints/es...
Dual-hemisphere sea ice thickness reference measurements from multiple data sources for evaluation and product inter-comparison of satellite altimetry
Abstract. Sea ice altimetry currently remains the primary method for estimating sea ice thickness from space, however time-series of sea ice thickness estimates are of limited use without having been ...
essd.copernicus.org
September 29, 2025 at 7:58 AM
Reposted by Renée M. Fredensborg Hansen
Poster Session

SP-43: Validation Methodologies for CRISTAL In-Flight Level-2 sea ice and iceberg products within the framework of the CRISTAL IN-PROVA Project 🛰️🛩️❄️🧊

Suggestions for validation scenarios or data to support #CRISTAL and synergies with CEMs? ➡️Submit here: forms.office.com/e/KkVhdzTwth
September 29, 2025 at 7:58 AM
Reposted by Renée M. Fredensborg Hansen
Last week, @reneefredensborg.bsky.social, Kristina Belinska and Stine Rose enjoyed the Mediterranean sun ☀️ in Crete while presenting results from @esa.int projects #S3MPC #St3tART-FO #IN-PROVA #CCI on calibration and validation of satellite altimetry during the calval4altcrete2025.eu ➡️
2nd International Review Workshop on Satellite Altimetry Cal/Val & Metrology
2nd International Review Workshop on Satellite Altimetry Cal/Val & Metrology The 2nd International Review on Satellite Altimetry Calibration/Validation (Cal/Val) and Metrology is to be held in Chania,...
calval4altcrete2025.eu
September 29, 2025 at 7:58 AM
Reposted by Renée M. Fredensborg Hansen
These past three days, @reneefredensborg.bsky.social, @tabea-rettelbach.bsky.social ‬& @kirkscanlan.bsky.social participated in the Symposium on Technology Advancement for Ice Remote Sensing (STAIRS) in Copenhagen, organised by the University of Copenhagen and the University of Manitoba 🛰️❄️
September 4, 2025 at 12:54 PM
Reposted by Renée M. Fredensborg Hansen
Welcome to our new bachelor students! 🎓

Yesterday marked the start of the new study year at DTU, where we welcomed 42 new bachelor students to our Earth and Space Physics and Engineering programme. Our head of study Sine Hvidegaard made sure the students got a good intro to their new student life.
September 2, 2025 at 9:16 AM