Ny-Ålesund. (Photo: Alfred Wegener Institut) Publication Change of the winter mean (December-January-February) relative humidity from Ny-Ålesund radiosondes. (Photo: Alfred-Wegener-Institut) A manuscript on [...] (AWIPEV Research Base in Ny-Ålesund, Spitsbergen) Radiosonde launch in Ny-Ålesund. (Photo: Alfred Wegener Institut) In Ny-Ålesund, radiosonde measurements are operated since 1991, with regular daily 12 UT [...] Annual cycle of tropospheric temperatures from radiosondes 1993 to 2014 in Ny-Ålesund. (Photo: Alfred Wegener Institut) Ny-Alesund Radiosondes: Reference Upper-Air Data The inhomogeneity in the historical and

subsurface reflections along a profile. Ground-penetrating radar survey at Kohnen station (Photo: Alfred-Wegener-Institut)

t Dr. Uwe John explains work processes to students in the lab. (Photo: Sina Löschke) The Alfred Wegener Institute (AWI) promotes students already at the start of their academic career. Through close c

cryo-Raman spectrometer (Photo: Alfred-Wegener-Institut) The cryo-Raman spectrometer of the Glaciology section is optimised for measurements on ice and other frozen samples. The whole microscope unit is [...] measurements across several days are also possible. Ice sample during measurement (Photo: Alfred-Wegener-Institut) The high spatial and spectral resolution and the automated mapping features enable hig

Permafrost carbon Sampling a Yedoma cliff, Sobo Sise island, Lena Delta (Photo: Alfred Wegener Institut) Arctic landscapes, especially those underlain by permafrost, are threatened by climate warming and [...] organic matter into the soil column. Scheme of the permafrost carbon feedback loop (Photo: Alfred Wegener Institut) Today, we know that syngenetic freezing of organic matter over a period of thousands of

Partners HB-Cluster: • Alfred Wegener Institute for Polar and Marine Research • University of Bremen, Department of Geosciences • MARUM, Center for Marine Environmental Sciences, Bremen • Konrad-Zuse-Zentrum

across the sea ice of Atka Bay (Photo: Alfred Wegener Institut) Helicopter EM Sensor Helicopter EM sensor measuring sea ice thickness (Photo: Alfred Wegener Institut) AEM measurement by Polar 5

(integrated in the area in blue on the map) freFresh water content cha (Graphic: T. Kovacs, Alfred-Wegener-Institut) The Arctic Ocean receives freshwater by run-off from Asia north of the Himalaya. Large

Methane Airborne measurements of atmospheric methane Methane signal over a lake. (Graphic: Alfred-Wegener-Institut) Methane (CH4) is an important greenhouse gas. Though its concentration in the atmosphere

and Earth System feedbacks Permafrost coring in the Fish Creek Delta, North Alaska (Photo: Alfred Wegener Institut) Arctic permafrost landscapes change rapidly under the influence of natural and anthropogenic [...] permafrost carbon pools and their vulnerability to mobilization Alaskan Yedoma cliff (Photo: Alfred Wegener Institut) Arctic landscapes underlain by permafrost are threatened by climate warming and may degrade [...] Degradation of ice-rich permafrost by thermal erosion thermoerosional valley Kurungnakh (Photo: Alfred-Wegener-Institut) Thermo-erosional valleys are widely distributed in ice-rich permafrost deposits of arctic