Origins of Coupled Model Biases in the Arabian Sea Climatological State
Origins of Coupled Model Biases in the Arabian Sea Climatological State
复制标题
阿拉伯海气候状态耦合模型偏差的起源
DOI:
10.1175/jcli-d-17-0417.1
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发表时间:
2018
影响因子:
4.9
通讯作者:
Julian P. McCreary and H. Annamalai
中科院分区:
文献类型:
--
作者:
Motoki Nagura;Julian P. McCreary and H. Annamalai
This study investigates biases of the climatological mean state of the northern Arabian Sea (NAS) in 31 coupled ocean–atmosphere models. The focus is to understand the cause of the large biases in the depth of the 20°C isotherm that occur in many of them. Other prominent biases are the depth and temperature of Persian Gulf water (PGW) and the wintertime mixed-layer thickness (MLT) along the northern boundary.For models that lack a Persian Gulf (group 1), is determined by the wintertime MLT bias through the formation of an Arabian Sea high-salinity water mass (ASHSW) that is too deep. For models with a Persian Gulf (group 2), if > MLT (group 2B), PGW remains mostly trapped to the western boundary and, again, directly controls . If MLT (group 2A), PGW spreads into the NAS and impacts because > 20°C; nevertheless still influencesindirectlythrough its impact on .The thick wintertime mixed layer is driven primarily by surface cooling during the fall. Nevertheless, variations in ΔMLT among the models are more strongly linked to biases in the density stratification (jump) across the bottom of the mixed layer than to biases. The jump is in turn determined primarily by sea surface salinity biases (ΔSSS) advected into the NAS by the West India Coastal Current, and the source of ΔSSS is the rainfall deficit associated with the models’ weak summer monsoon. Ultimately, then, ΔD20 is linked to this deficit.
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影响因子:
--
作者:
T. Prasad;M. Ikeda;S. P. Kumar
通讯作者:
T. Prasad;M. Ikeda;S. P. Kumar
DOI:
10.1016/0011-7471(75)90046-7
发表时间:
1975-09
期刊:
Deep Sea Research and Oceanographic Abstracts
影响因子:
--
作者:
David Anderson;A. E. Gill
通讯作者:
David Anderson;A. E. Gill
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1029/97gl01876
发表时间:
1997
期刊:
影响因子:
--
作者:
J. Morrison
通讯作者:
J. Morrison
影响因子:
4.9
作者:
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通讯作者:
G. Martin;S. Milton;C. Senior;M. Brooks;S. Ineson;T. Reichler;J. Kim