An evaluation of the simulations of the Arctic Intermediate Water in climate models and reanalyses

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	An evaluation of the simulations of the Arctic Intermediate Water in climate models and reanalyses
	Li Xiang 1,2; Su Jie 1; Zhao Jinping 1
刊名	ACTA OCEANOLOGICA SINICA
	2014-12-01
卷号	33 期号:12 页码:1-14
关键词	Arctic Intermediate Water model evaluation Arctic modeling impact of data assimilation
通讯作者	Su, J (reprint author), Ocean Univ China, Key Lab Phys Oceanog, Qingdao 266100, Peoples R China.
英文摘要	The simulations of the Arctic Intermediate Water in four datasets of climate models and reanalyses, CCSM3, CCSM4, SODA and GLORYS, are analyzed and evaluated. The climatological core temperatures and depths in both CCSM models exhibit deviations over 0.5A degrees C and 200 m from the PHC. SODA reanalysis reproduces relatively reasonable spatial patterns of core temperature and depth, while GLORYS, another reanalysis, shows a remarkable cooling and deepening drift compared with the result at the beginning of the dataset especially in the Eurasian Basin (about 2A degrees C). The heat contents at the depth of intermediate water in the CCSM models are overestimated with large positive errors nearly twice of that in the PHC. To the contrary, the GLORYS in 2009 show a negative error with a similar magnitude, which means the characteristic of the water mass is totally lost. The circulations in the two reanalyses at the depth of intermediate water are more energetic and realistic than those in the CCSMs, which is attributed to the horizontal eddy-permitting resolution. The velocity fields and the transports in the Fram Strait are also investigated. The necessity of finer horizontal resolution is concluded again. The northward volume transports are much larger in the two reanalyses, although they are still weak comparing with mooring observations. Finally, an investigation of the impact of assimilation is done with an evidence of the heat input from assimilation. It is thought to be a reason for the good performance in the SODA, while the GLORYS drifts dramatically without assimilation data in the Arctic Ocean.
学科主题	Oceanography
收录类别	SCI
语种	英语
WOS记录号	WOS:000346071800001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/23909]
专题	海洋研究所_海洋环流与波动重点实验室
作者单位	1.Ocean Univ China, Key Lab Phys Oceanog, Qingdao 266100, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Wave, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Li Xiang,Su Jie,Zhao Jinping. An evaluation of the simulations of the Arctic Intermediate Water in climate models and reanalyses[J]. ACTA OCEANOLOGICA SINICA,2014,33(12):1-14.
APA	Li Xiang,Su Jie,&Zhao Jinping.(2014).An evaluation of the simulations of the Arctic Intermediate Water in climate models and reanalyses.ACTA OCEANOLOGICA SINICA,33(12),1-14.
MLA	Li Xiang,et al."An evaluation of the simulations of the Arctic Intermediate Water in climate models and reanalyses".ACTA OCEANOLOGICA SINICA 33.12(2014):1-14.