FN Archimer Export Format PT J TI An intercomparison of Arctic ice drift products to deduce uncertainty estimates BT AF SUMATA, Hiroshi LAVERGNE, Thomas GIRARD-ARDHUIN, Fanny KIMURA, Noriaki TSCHUDI, Mark A. KAUKER, Frank KARCHER, Michael GERDES, Rudiger AS 1:1;2:2;3:3;4:4;5:5;6:1,6;7:1,6;8:1,7; FF 1:;2:;3:PDG-ODE-LOS;4:;5:;6:;7:;8:; C1 Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Bremerhaven, Germany. Norwegian Meteorol Inst, Oslo, Norway. IFREMER, Lab Oceanog Space, Plouzane, France. Natl Inst Polar Res, Tachikawa, Tokyo, Japan. Univ Colorado, Boulder, CO 80309 USA. Ocean Atmosphere Syst, Hamburg, Germany. Jacobs Univ Bremen, D-28759 Bremen, Germany. C2 INST A WEGENER, GERMANY NORWEGIAN METEOROL INST, NORWAY IFREMER, FRANCE NATL INST POLAR RES, JAPAN UNIV COLORADO BOULDER, USA OCEAN ATMOSPHERE SYST, GERMANY UNIV JACOBS BREMEN, GERMANY SI BREST SE PDG-ODE-LOS IN WOS Ifremer jusqu'en 2018 copubli-europe copubli-int-hors-europe TC 70 UR https://archimer.ifremer.fr/doc/00203/31395/29783.pdf LA English DT Article AB An intercomparison of four low-resolution remotely sensed ice-drift products in the Arctic Ocean is presented. The purpose of the study is to examine the uncertainty in space and time of these different drift products. The comparison is based on monthly mean ice drifts from October 2002 to December 2006. The ice drifts were also compared with available buoy data. The result shows that the differences of the drift vectors are not spatially uniform, but are covariant with ice concentration and thickness. In high (low) ice-concentration areas, the differences are small (large), and in thick (thin) ice-thickness areas, the differences are small (large). A comparison with the drift deduced from buoys reveals that the error of the drift speed depends on the magnitude of the drift speed: larger drift speeds have larger errors. Based on the intercomparison of the products and comparison with buoy data, uncertainties of the monthly mean drift are estimated. The estimated uncertainty maps reasonably reflect the difference between the products in relation to ice concentration and the bias from the buoy drift in relation to drift speed. Examinations of distinctive features of Arctic sea ice motion demonstrate that the transpolar drift speed differs among the products by 13% (0.32 cm s−1) on average, and ice drift curl in the Amerasian Basin differs by up to 24% (3.3 × 104 m2 s−1). These uncertainties should be taken into account if these products are used, particularly for model validation and data assimilation within the Arctic. PY 2014 PD AUG SO Journal Of Geophysical Research-oceans SN 0148-0027 PU Amer Geophysical Union VL 119 IS 8 UT 000342519500011 BP 4887 EP 4921 DI 10.1002/2013JC009724 ID 31395 ER EF