PolarBremen

PolarBremen, 5 days ago to random

@awi 's EM-Bird can measure sea ice thickness from a helicopter: today Janna from our group learned to operate the instrument over the Jade Bight (North Sea). Great weather, but sadly, 0 cm sea ice! 😉

PolarBremen, 11 days ago to random

Thread radio frequency interference (RFI) 🧵
During the last winter we had to filter out large parts of our SMOS satellite thin ice data due to radio frequency interference (RFI): the grey ocean area in the image.

PolarBremen, 16 days ago to worldwithoutus

Did you ever wonder how @awi 's airborne laser scanner data can help classifying #Arctic sea ice surfaces from high-resolution #SAR data? Can the satellite 🛰️ data tell us whether there is open water, level or deformed ice? Check out this new paper! #MOSAiCexpedtion ➡️ https://doi.org/10.5194/tc-18-2207-2024

PolarBremen, 23 days ago to random

Disaster movie night of our group! Watching such a film (sun eruptions, "interesting physics", volcanoes, shift of the Earth crust...) with a bunch of environmental scientists: some discussions are inevitable 😉

PolarBremen, 1 month ago to random

#EGU2024! Today at 16:54–16:56 (CEST) it is time to learn about melt pond detection from infrared images using a large segmentation model! https://meetingorganizer.copernicus.org/EGU24/EGU24-20355.html

PolarBremen, 1 month ago to worldwithoutus

Leads are cracks in the sea ice that influence the #Arctic heat budget. Find out how we study them using high-resolution helicopter observations from the #MOSAiC expedition in our latest study! ➡️ https://online.ucpress.edu/elementa/article/12/1/00023/200371/Spatio-temporal-variability-of-small-scale-leads

PolarBremen, 2 months ago to climate

We are hiring: two #PhD positions in remote sensing of sea ice. If you are interested in #climate, #Arctic amplification, #satellites, and #seaice physics join our team: https://www.uni-bremen.de/en/university/the-university-as-an-employer/job-vacancies-1/job/3160

PolarBremen, 2 months ago to worldwithoutus

Melt ponds on sea ice have a strong impact on the partitioning of solar radiation at the surface in the #Arctic summer. Check out our new paper, where we describe how we retrieve melt pond fraction from optical satellite data (https://tc.copernicus.org/articles/18/933/2024/) & the final product on our website: https://seaice.uni-bremen.de/melt-ponds/

PolarBremen, 2 months ago to random

We are enjoying scientific discussions & fashion at the 3rd international #MOSAiCexpedition Science Conference @ #AWI Potsdam. Wait, fashion? Yes! You see us in front of clothes from fabrics designed by Amy Lauren [https://www.projectseaice.com] showing sea ice crystal patterns!

PolarBremen, 3 months ago to random

The dancing iceberg #A23a is visible in our sea ice dataset (https://data.seaice.uni-bremen.de/databrowser/#p=sic), but beware: this is the largest iceberg of the world, not a few meters of sea ice!

video/mp4

PolarBremen, 3 months ago to random

When we arrived the sun just came back above the horizon. Now we already have several hours of daylight. The C-SCAT radar is up and running, measuring microwave backscatter of sea ice and snow. Temperatures dropped below –30°C, brrrr 🥶

Two people and a big sledge with instruments on sea ice with orange sun just above the horizon in the background.

PolarBremen, 4 months ago to random

First day on the #seaice during our campaign in #CambridgeBay with colleagues from ICM-CSIC (Institut de Ciències del Mar) and University of Victoria measuring microwave and infrared signatures of sea ice!Ice thickness 96 cm, snow depth 6 to 19 cm, –16°C

PolarBremen, 4 months ago to worldwithoutus

Have a look how the melt pond fraction in the #Arctic has developed last summer. Output of of our new #satellite retrieval of melt ponds on #Arctic sea ice available as preprint in The Cryosphere https://doi.org/10.5194/egusphere-2023-2194

Video of maps showing Arctic-wide melt pond fractions from May 2023 to August 2023.

PolarBremen, 4 months ago to worldwithoutus

In a case study from the #MOSAiC #Arctic expedition we explored the impact of surface changes (spoiler: glazing, i.e., a thin ice crust at the top of the snowpack) due to warm air intrusions on #seaice concentration retrievals from space.🛰️ https://doi.org/10.1525/elementa.2023.00039

PolarBremen, 4 months ago (edited 4 months ago) to random

Exciting update in Earth Observation! 🛰️ The European Space Agency launches the #CIMRL2PAD project, a 4-year initiative to advance #EO technology.
We will contribute to this international project led by MET Norway, with new algorithms for thin sea ice thickness, ice type and snow on sea ice for the upcoming CIMR satellite.
https://www.uni-bremen.de/en/university/university-communication-and-marketing/all-news/details/significant-leap-in-earth-observation-technology
image © Thales Alenia Space

PolarBremen, 5 months ago to random

The Hokkaido University - University of Bremen Exchange Days at @MARUM in Bremen are a great opportunity to discuss a broad range of #marine and #polar topics! Many interesting talks featuring sea ice, snow buoys, seaweeds and much more!

PolarBremen, 5 months ago to random

This week we were at TROPOS @TROPOS in Leipzig for the (AC)3 general assembly and the HALO-(AC)3 meeting. It was great to see many familiar faces and hear about all the accomplishments of the second phase of this project!

PolarBremen, 5 months ago to Japan

Our #PhD, Alexander Mchedlishvili, just returned from a successful trip to #Japan, during which time he attended the The 14th Symposium on Polar Science and did a short research stay at the Institute of Low Temperature Science, Hokkaido University!

Building of the Hokkaido Unversity.

PolarBremen, 5 months ago to worldwithoutus

We are excited! 🥳The SFB/TRR 172 "(AC)³ Arctic Amplification" has been awarded a new grant & will continue its research in the 3rd phase of @dfg_public funding for further 4 years! Focus is on understanding the rapidly increasing warming in the #Arctic🌨️ http://ac3-tr.de

PolarBremen, 6 months ago to random

Today we have a challenge for you! This #Sentinel1 🛰️ timeseries of a region in the Baffin Bay reveals an Arctic natural oil seep amongst look-alikes and #SeaIce ❄️ 🌊 ⚫ Can you spot the oil-slicks in the video? #ArcticResearch #SAR

video/mp4

PolarBremen, 6 months ago to worldwithoutus

Great example of cooperation between @UniOsnabrück and Bremen: Marlena is a finalist of the "AI and Sustainability" competition @BerlinSciWeek! 🥳 In her BSc thesis she used deep learning to detect melt ponds on #Arctic sea ice using thermal infrared images. Find the online presentation tomorrow, November 2, 2023, on https://berlinscienceweek.com/event/presentation-of-finalists-competition-ai-and-sustainability/

PolarBremen, 6 months ago to worldwithoutus

Passive microwave radiometers in space 🛰️ are a great tool to observe atmosphere and surface in the #Arctic! Check out our new paper where we describe how we model snow and ice microwave emissions for a multi-parameter retrieval including sea ice concentration, snow depth on sea ice, water vapor and more! ➡️ https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023EA003177