The mean surface circulation of the North Atlantic subpolar gyre: A comparison of estimates derived from new gravity and oceanographic measurements
The mean surface circulation of the North Atlantic subpolar gyre: A comparison of estimates derived from new gravity and oceanographic measurements
复制标题
北大西洋副极地环流的平均表面环流：根据新的重力和海洋学测量得出的估计值的比较
DOI：
10.1029/2010jc006877
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发表时间：
2011
影响因子：
--
通讯作者：
D. Wright
中科院分区：
文献类型：
--
作者：
S. Higginson;K. Thompson;Jianliang Huang;M. Véronneau;D. Wright
[1] 一种新的平均海面地形（MSST）被用于估算西北大西洋亚极地环流的表层环流。该MSST是利用一个新的大地水准面模型生成的，这个模型是由来自重力恢复与气候实验（GRACE）卫星任务的重力数据、卫星高度计以及陆地测量数据混合而成。将MSST与一个海洋模型生成的地形进行了比较，该海洋模型在频谱上被调整到一种新的阿尔戈周期温度和盐度气候态。将与大地测量MSST相关的平均表层环流与来自表层漂流浮标、系泊设备以及其他原位测量的环流估算值进行了比较。发现大地测量MSST和环流估算值在定性和定量上都与其他估算值非常吻合。发现这种地形相较于早期的大地测量估算值有所改进，对沿岸流的分辨率更高。同时也发现海洋模型对陆架区域水流的估算存在不足。
[1] A new mean sea surface topography (MSST) is used to estimate the surface circulation of the subpolar gyre of the northwest Atlantic. The MSST is produced using a new geoid model derived from a blend of gravity data from the Gravity Recovery and Climate Experiment (GRACE) satellite mission, satellite altimeters, and terrestrial measurements. The MSST is compared with a topography produced by an ocean model which is spectrally nudged to a new Argo period temperature and salinity climatology. The mean surface circulation associated with the geodetic MSST is compared with estimates of the circulation from surface drifters, moorings, and other in situ measurements. The geodetic MSST and circulation estimate are found to be in good agreement with the other estimates, both qualitatively and quantitatively. The topography is found to be an improvement over an earlier geodetic estimate with better resolution of the coastal currents. Deficiencies are identified in the ocean model's estimate of flow over shelf regions.