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首页> 外文期刊>Geophysical Research Letters >Mass variation in the Mediterranean Sea from GRACE and its validation by altimetry, steric and hydrologic fields
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Mass variation in the Mediterranean Sea from GRACE and its validation by altimetry, steric and hydrologic fields

机译:来自GRACE的地中海质量变化及其经测高,立体和水文领域的验证

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The seasonal seawater mass variation in the Mediterranean Sea is estimated between April 2002 and July 2004 from GRACE and altimetry data and from hydrologic and oceanographic models. A smoothed spatial averaging kernel is applied to each field, in order to obtain comparable basin averages. The GRACE seawater mass corrected for the leakage of continental hydrology and the filtered steric-corrected altimeter sea level have similar annual amplitude and phase. To restore the magnitude of the GRACE-derived water mass signal we apply a scaling factor to the smoothed annual amplitude. The estimated scaled mass signal has an annual amplitude of 52 +/- 17 mm peaking in November. We combine the seawater mass variation with the Mediterranean freshwater deficit and obtain a net flow at the Strait of Gibraltar with annual amplitude of 60 +/- 25 mm/month (0.06 Sv) and maximum in September.
机译:根据GRACE和测高仪数据以及水文和海洋学模型,估计2002年4月至2004年7月之间地中海的季节性海水质量变化。将平滑的空间平均核应用于每个字段,以获得可比的盆地平均值。校正了大陆水文学渗漏的GRACE海水质量和经空间校正的经滤波的高度计海平面具有相似的年振幅和相位。为了恢复GRACE派生的水质信号的强度,我们将比例因子应用于平滑的年振幅。估计的按比例缩放的质量信号的年度振幅为52 +/- 17毫米,11月达到峰值。我们将海水质量变化与地中海淡水短缺相结合,并在直布罗陀海峡获得净流量,其年振幅为60 +/- 25毫米/月(0.06 Sv),9月最大。

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