Comparison of diurnal tide in models and ground-based observations during the 2005 equinox CAWSES tidal campaign
Comparison of diurnal tide in models and ground-based observations during the 2005 equinox CAWSES tidal campaign
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DOI：
10.1016/j.jastp.2010.12.010
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发表时间：
2012-04
影响因子：
1.9
通讯作者：
L. Chang;W. Ward;S. Palo;Jian Du;D. Y. Wang;Han L. Liu;M. Hagan;Y. Portnyagin;J. Oberheide;L. Goncharenko;Takuji Nakamura;P. Hoffmann;W. Singer;P. Batista;B. Clemesha;A. Manson;D. Riggin;C. She;T. Tsuda;T. Yuan
中科院分区：
文献类型：
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作者：
L. Chang;W. Ward;S. Palo;Jian Du;D. Y. Wang;Han L. Liu;M. Hagan;Y. Portnyagin;J. Oberheide;L. Goncharenko;Takuji Nakamura;P. Hoffmann;W. Singer;P. Batista;B. Clemesha;A. Manson;D. Riggin;C. She;T. Tsuda;T. Yuan
本研究将首次CAWSES全球潮汐运动的春分日潮风场地面观测结果与五种常用模式的结果进行比较，以确定系统差异。WACCM3和Extended cmm都是自洽的大气环流模式，可以解析一般的气候特征，而TIME-GCM可以利用再分析场来近似特定的条件。GSWM是一个线性机制模型；而GEWM是基于地面和卫星观测得出的经验模型。模式解析的日潮与观测值的纬向结构一致，以向上传播的（1,1）模式为主。潮汐振幅和垂直波长的大小存在差异，而纵向潮汐变率的差异表明模式中非迁移潮的差异。这些观点表明，在模式强迫、消散和背景风方面存在不一致之处，必须作为模式界协调努力的一部分加以检查。
In this study, ground-based observations of equinox diurnal tide wind fields from the first CAWSES Global Tidal Campaign are compared with results from five commonly used models, in order to identify systematic differences. WACCM3 and Extended CMAM are both self-consistent general circulation models, which resolve general climatological features, while TIME-GCM can be forced to approximate specific conditions using reanalysis fields. GSWM is a linear mechanistic model; while GEWM is an empirical model derived from ground-based and satellite observations. The models resolve diurnal tides consistent in latitudinal structure with observations, dominated by the upward propagating (1,1) mode. There is disagreement in the magnitudes of the tidal amplitudes and vertical wavelengths, while differences in longitudinal tidal variability indicate differences in the nonmigrating tides in the models. These points suggest inconsistencies in model forcing, dissipation, and background winds that must be examined as part of a coordinated effort from the modeling community.