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TC | Volume 12, issue 11
The Cryosphere, 12, 3671–3691, 2018
https://doi.org/10.5194/tc-12-3671-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
The Cryosphere, 12, 3671–3691, 2018
https://doi.org/10.5194/tc-12-3671-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 26 Nov 2018

Research article | 26 Nov 2018

Impact of assimilating a merged sea-ice thickness from CryoSat-2 and SMOS in the Arctic reanalysis

Jiping Xie et al.
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Allard, R. A., Farrell, S. L., Hebert, D. A., Johnston, W. F., Li, L., Kurtz, N. T., Phelps, M. W., Posey, P. G., Tilling, R., Ridout, A., and Wallcraft, A. J.: Utilizing CryoSat-2 sea ice thickness to initialize a coupled ice-ocean modeling system, Adv. Space Res., 62, 1265–1280, https://doi.org/10.1016/j.asr.2017.12.030, 2018. 
Bathiany, S., Notz, D., Mauritsen, T., Raedel, G., and Brovkin, V.: On the potential for abrupt Arctic winter sea ice loss. J. Climate, 29, 2703–2719, https://doi.org/10.1175/JCLI-D-15-0466.1, 2016. 
Bertino, L. and Lisæter, K. A.: The TOPAZ monitoring and prediction system for the Atlantic and Arctic Oceans, J. Oper. Oceanogr., 1, 15–19, https://doi.org/10.1080/1755876X.2008.11020098, 2008 
Bentsen, M., Evensen, G., Drange, H., and Jenkins, A. D.: Coordinate transformation on a sphere using conformal mapping, Mon. Weather Rev., 127, 2733–2740, https://doi.org/10.1175/1520-0493(1999)127<2733:CTOASU>2.0.CO:2, 1999. 
Bouillon, S., Fichefet, T., Legat, V., and Madec, G.: The elastic-viscous-plastic method revised, Ocean Modell., 7, 2–12, https://doi.org/10.1016/j.ocemod.2013.05.013, 2013. 
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We use the winter sea-ice thickness dataset CS2SMOS merged from two satellites SMOS and CryoSat-2 for assimilation into an ice–ocean reanalysis of the Arctic, complemented by several other ocean and sea-ice measurements, using an Ensemble Kalman Filter. The errors of sea-ice thickness are reduced by 28% and the improvements persists through the summer when observations are unavailable. Improvements of ice drift are however limited to the Central Arctic.
We use the winter sea-ice thickness dataset CS2SMOS merged from two satellites SMOS and...
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