气候变化领域集成服务门户(CCPortal): Improved representation of Arctic sea ice velocity field in ocean–sea ice models based on satellite observations

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DOI	10.1007/s00382-021-05843-4
	Improved representation of Arctic sea ice velocity field in ocean–sea ice models based on satellite observations
	Toyoda T.; Kimura N.; Urakawa L.S.; Tsujino H.; Nakano H.; Sakamoto K.; Yamanaka G.; Komatsu K.K.; Matsumura Y.; Kawaguchi Y.
发表日期	2021
ISSN	0930-7575
英文摘要	Accurate description of sea ice velocity is necessary for improving the reproduction and prediction of high-latitude climate in modeling studies. In order to improve the simulated sea ice velocity field based on satellite-derived daily data, a set of sea ice dynamic parameters of the ocean–sea ice model was optimized with a Green’s function method, which uses linear combination of forward sensitivity operators for these parameters. An improved sea ice velocity field with 15–20% error reduction was obtained for both simulations with and without the data constraint of sea ice concentration. Moreover, dependencies of the sea ice dynamic parameters on background conditions were examined and linear dependency coefficients were also optimized by extending the above method. The sea ice velocity field was further improved for both free-drift and high-pressure regions with mean error reduction of about 25%. This resulted in decreases of surface salinities in the marginal ice zones, making them closer to observations. While the parameter adjustments as constants tended mainly to compensate influences of biases in surface forcing, the obtained dependencies were generally consistent with previous observational and theoretical studies and thus improved parameterizations of air–ice–ocean momentum exchange and ice pressure which are widely used in OGCMs. The enhanced ocean–sea ice initialization and parameterizations would be useful for operational seasonal prediction and climate prediction studies. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Arctic Ocean; Data assimilation; Ocean reanalysis; Sea ice velocity
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183410
作者单位	Department of Atmosphere, Ocean and Earth System Modeling Research, Meteorological Research Institute, Japan Meteorological Agency, 1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan; Division of Climate System Research, Department of Climate System Modeling, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan; Department of Climate and Geochemistry Research, Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan; Division of Climate System Research, Department of Fisheries Environmental Oceanography, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan; Division of Ocean-Earth System Science, Department of Physical Oceanography, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
推荐引用方式 GB/T 7714	Toyoda T.,Kimura N.,Urakawa L.S.,等. Improved representation of Arctic sea ice velocity field in ocean–sea ice models based on satellite observations[J],2021.
APA	Toyoda T..,Kimura N..,Urakawa L.S..,Tsujino H..,Nakano H..,...&Kawaguchi Y..(2021).Improved representation of Arctic sea ice velocity field in ocean–sea ice models based on satellite observations.Climate Dynamics.
MLA	Toyoda T.,et al."Improved representation of Arctic sea ice velocity field in ocean–sea ice models based on satellite observations".Climate Dynamics (2021).