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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >ARGO upper salinity measurements: perspectives for L-band radiometers calibration and retrieved sea surface salinity validation
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ARGO upper salinity measurements: perspectives for L-band radiometers calibration and retrieved sea surface salinity validation

机译:ARGO高盐度测量:L波段辐射计校准和获取的海面盐度验证的前景

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摘要

With the view of preparing the strategy for the calibration/validation of future L-band satellite radiometers, we examine the salinity variability recorded by Array for Real-Time Geostrophic Oceanography (ARGO) floats in the upper 10-m layer of the surface ocean. Using one year of ARGO measurements,we show that the surface salinity variability at ten days and 200-km scales is above /spl plusmn/0.1 psu for 30% of the drifters and that this variability is larger than 0.2 psu in tropical regions affected by strong river discharges and by precipitations, and in frontal areas characterized by strong mesoscale activity. Vertical gradient observed between 5-10-m depth is much lower than the horizontal variability but leads to systematic biases in the tropics. The South Pacific Ocean appears to be the less variable both vertically and horizontally.
机译:鉴于准备用于未来L波段卫星辐射计的校准/验证策略的方法,我们检查了由Array用于实时地转海洋学(ARGO)浮标记录在地表海洋上部10米层中的盐度变异性。使用一年的ARGO测量,我们发现30%的流浪者在10天和200 km尺度下的表面盐度变异性高于/ spl plusmn / 0.1 psu,并且在受热带影响的热带地区,该变异性大于0.2 psu强劲的河流流量和降水,以及以中尺度活动为特征的额叶地区。在5-10-m深度之间观察到的垂直梯度远低于水平变化率,但会导致热带地区出现系统性偏差。南太平洋在垂直和水平方向上似乎变化较小。

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