Evaluation of sea surface salinity observed by Aquarius
Evaluation of sea surface salinity observed by Aquarius
复制标题
DOI：
10.1109/igarss.2014.6947473
复制
发表时间：
2014-11
期刊：
影响因子：
--
通讯作者：
N. Ebuchi;H. Abe
中科院分区：
文献类型：
--
作者：
N. Ebuchi;H. Abe
将Aquarius使命获得的海表盐度数据与Argo浮标的全球观测数据进行了比较，以评价海表盐度的质量并评估误差结构。Aquarius SSS与Argo近地表盐度一致，均方根（rms）差为0.42 psu（2.10.1版标准产品）。盐度观测的残差与海表温度（SST）和风速有显著的相关性。由于对银河系辐射的不准确修正而引起的SSS偏差也是可以辨别的。通过不同算法检索的Aquarius SSS获得了相似的结果。Aquarius月SSS平均值超过1° × 1°，还与全球海洋最佳插值系统的输出进行了比较。在40°S-40°N范围内计算的均方根差为0.27 psu（版本2.10.1标准产品）。对于通过替代算法（CAP版本25.1）回收的产品，均方根差降至0.21 psu，非常接近Aquarius使命的目标。
Sea surface salinity (SSS) data derived from the Aquarius mission were compared with global observation by Argo floats to evaluate the quality of the SSS and assess the error structure. The Aquarius SSSs agreed well with the Argo near-surface salinity with a root-mean-square (rms) difference of 0.42 psu (version 2.10.1 standard product). The residual of the salinity observation showed a significant correlation with the sea surface temperature (SST) and wind speed. SSS bias caused by inaccurate corrections for the galactic radiation was also discernible. Similar results were obtained for the Aquarius SSSs retrieved by the different algorithms. Aquarius monthly SSS averaged over 1° × 1° was also compared with outputs from a global ocean optimal interpolation system. The rms difference, calculated over 40°S-40°N, was 0.27 psu (version 2.10.1 standard product). The rms difference was reduced to 0.21 psu, which is very close to the goal of the Aquarius mission, for the product retrieved by an alternative algorithm (CAP version 25.1).