FN Archimer Export Format PT J TI Thin ice and storms: Sea ice deformation from buoy arrays deployed during N-ICE2015 BT AF ITKIN, Polona SPREEN, Gunnar CHENG, Bin DOBLE, Martin GIRARD-ARDHUIN, Fanny HAAPALA, Jari HUGHES, Nick KALESCHKE, Lars NICOLAUS, Marcel WILKINSON, Jeremy AS 1:1;2:1,2;3:3;4:4;5:5;6:3;7:6;8:7;9:8;10:9; FF 1:;2:;3:;4:;5:PDG-ODE-LOPS-SIAM;6:;7:;8:;9:;10:; C1 Norwegian Polar Res Inst, Tromso, Norway. Univ Bremen, Inst Environm Phys, Bremen, Germany. Finnish Meteorol Inst, Helsinki, Finland. Polar Sci Ltd, Appin, Argyll, Scotland. IFREMER, Lab Oceanog Phys & Spatiale, Plouzane, France. Norwegian Meteorol Inst, Tromso, Norway. Univ Hamburg, Inst Oceanog, Hamburg, Germany. Helmholtz Zentrum Polar & Meeresforsch, Alfred Wegener Inst, Bremerhaven, Germany. British Antarctic Survey, Cambridge, England. C2 NORWEGIAN POLAR RES INST, NORWAY UNIV BREMEN, GERMANY FINNISH METEOROL INST, FINLAND POLAR SCI LTD, UK IFREMER, FRANCE NORWEGIAN METEOROL INST, NORWAY UNIV HAMBURG, GERMANY HELMHOLTZ ZENTRUM POLAR & MEERESFORSCH, GERMANY BRITISH ANTARCTIC SURVEY, UK SI BREST SE PDG-ODE-LOPS-SIAM UM LOPS IN WOS Ifremer jusqu'en 2018 copubli-europe IF 2.711 TC 80 UR https://archimer.ifremer.fr/doc/00392/50365/51067.pdf LA English DT Article AB Arctic sea ice has displayed significant thinning as well as an increase in drift speed in recent years. Taken together this suggests an associated rise in sea ice deformation rate. A winter and spring expedition to the sea ice covered region north of Svalbard–the Norwegian young sea ICE2015 expedition (N-ICE2015)—gave an opportunity to deploy extensive buoy arrays and to monitor the deformation of the first-year and second-year ice now common in the majority of the Arctic Basin. During the 5 month long expedition, the ice cover underwent several strong deformation events, including a powerful storm in early February that damaged the ice cover irreversibly. The values of total deformation measured during N-ICE2015 exceed previously measured values in the Arctic Basin at similar scales: At 100 km scale, N-ICE2015 values averaged above 0.1 d−1, compared to rates of 0.08 d−1 or less for previous buoy arrays. The exponent of the power law between the deformation length scale and total deformation developed over the season from 0.37 to 0.54 with an abrupt increase immediately after the early February storm, indicating a weakened ice cover with more free drift of the sea ice floes. Our results point to a general increase in deformation associated with the younger and thinner Arctic sea ice and to a potentially destructive role of winter storms. PY 2017 PD JUL SO Journal Of Geophysical Research-oceans SN 2169-9275 PU Amer Geophysical Union VL 122 IS 6 UT 000407088800010 BP 4661 EP 4674 DI 10.1002/2016JC012403 ID 50365 ER EF