Publication Date:
2024-02-27
Description:
Helicopter-borne electromagnetic sea ice thickness measurements were performed over the Transpolar Drift in late summers of 2001, 2004, and 2007, continuing ground-based measurements since 1991. These show an ongoing reduction of modal and mean ice thicknesses in the region of the North Pole of up to 53 and 44%, respectively, since 2001. A buoy derived ice age model showed that the thinning was mainly due to a regime shift from predominantly multi- and second-year ice in earlier years to first-year ice in 2007, which had modal and mean summer thicknesses of 0.9 and 1.27 m. Measurements of second-year ice which still persisted at the North Pole in April 2007 indicate a reduction of late-summer second-year modal and mean ice thicknesses since 2001 of 20 and 25% to 1.65 and 1.81 m, respectively. The regime shift to younger and thinner ice could soon result in an ice free North Pole during summer.
Keywords:
Airship; Arctic Ocean; Arctic Ocean, Central Basin; ARK-XX/2; ARK-XXII/2; AWI_SeaIce; Electro-magnetic Bird (EM-Bird); EMB; HEM_ARK20_01; HEM_ARK20_02; HEM_ARK20_03; HEM_ARK20_04a; HEM_ARK20_04b; HEM_ARK20_04c; HEM_ARK20_05; HEM_ARK20_06; HEM_ARK20_07; HEM_ARK20_08; HEM_ARK20_09; HEM_ARK20_10; HEM_ARK22_01; HEM_ARK22_02a; HEM_ARK22_02b; HEM_ARK22_03; HEM_ARK22_04; HEM_ARK22_05a; HEM_ARK22_05b; HEM_ARK22_06; HEM_ARK22_07a; HEM_ARK22_07b; HEM_ARK22_08a; HEM_ARK22_08b; HEM_ARK22_09; HEM_ARK22_10; HEM_ARK22_11a; HEM_ARK22_11b; HEM_ARK22_12a; HEM_ARK22_12b; HEM_ARK22_13; HEM_ARK22_14; HEM_ARK22_15a; HEM_ARK22_15b; HEM_ARK22_16; HEM_ARK22_17; HEM_PoleAirship07_01; International Polar Year (2007-2008); IPY; Polarstern; PS66; PS70 SPACE DAMOCLES; Sea Ice Physics @ AWI; Total_Pole_Airship_2007; Total Pole Airship 2007
Type:
Dataset
Format:
application/zip, 37 datasets
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