Surface Ocean Mixing Inferred from Different Multisatellite Altimetry Measurements
Surface Ocean Mixing Inferred from Different Multisatellite Altimetry Measurements
复制标题
从不同的多卫星测高测量推断出的表层海洋混合
DOI：
10.1175/2010jpo4458.1
复制
发表时间：
2010
影响因子：
3.5
通讯作者：
G. Goñi
中科院分区：
文献类型：
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作者：
F. Beron;M. J. Olascoaga;G. Goñi
对卫星海洋测高(AVISO)资料存档、验证和解译所分布的两个海面高度(SSH)距平场的混合效应进行了评价。一个SSH异常场TAG REF是利用两个卫星高度计的测量构建的；另一个SSH异常场TAG UPD是使用最多四个卫星高度计的测量构建的。平流是由地面地转流提供的，这些SSH异常场与平均SSH场相加所产生的总SSH场是由地面地转流提供的。重点是从拉格朗日相干结构(LCS)的洋流中提取，LCS作为被动平流示踪形成的模式的骨架，完全控制混合。用于检测LCS的诊断工具是通过计算有限时间Lyapunov指数来提供的。结果表明，利用UPD SSH异常推断的海流支持具有相似特征的混合。
Abstract Two sea surface height (SSH) anomaly fields distributed by Archiving, Validation, and Interpretation of Satellite Oceanographic (AVISO) Altimetry are evaluated in terms of the effects that they produce on mixing. One SSH anomaly field, tagged REF, is constructed using measurements made by two satellite altimeters; the other SSH anomaly field, tagged UPD, is constructed using measurements made by up to four satellite altimeters. Advection is supplied by surface geostrophic currents derived from the total SSH fields resulting from the addition of these SSH anomaly fields to a mean SSH field. Emphasis is placed on the extraction from the currents of Lagrangian coherent structures (LCSs), which, acting as skeletons for patterns formed by passively advected tracers, entirely control mixing. The diagnostic tool employed to detect LCSs is provided by the computation of finite-time Lyapunov exponents. It is found that currents inferred using UPD SSH anomalies support mixing with characteristics similar t...
影响因子：
--
作者：
M. J. Olascoaga;F. Beron-Vera;Larry E. Brand;Hüseyin Koçak
通讯作者：
M. J. Olascoaga;F. Beron-Vera;Larry E. Brand;Hüseyin Koçak