Preliminary validation of SMOS sea surface salinity measurements in the South China Sea

Yongzheng Ren; Qing Dong; Mingxia He

doi:10.1007/s00343-014-3338-5

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Preliminary validation of SMOS sea surface salinity measurements in the South China Sea

Updated：2023-05-16

- Preliminary validation of SMOS sea surface salinity measurements in the South China Sea
- Journal of Oceanology and Limnology Vol. 33, Issue 1, Pages: 262-271(2015)
- Affiliations：
  
  1. Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences
  2. Ocean Remote Sensing Institute Ocean University of China
- Author bio：
- Funds：
- DOI：10.1007/s00343-014-3338-5
  CLC：
- Online First：21 October 2014，
  
  Published：2015
- Accepted：
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Ren, Y., Dong, Q. & He, M. Preliminary validation of SMOS sea surface salinity measurements in the South China Sea., Chin. J. Ocean. Limnol. 33, 262–271 (2015). https://doi.org/10.1007/s00343-014-3338-5
DOI：

Ren, Y., Dong, Q. & He, M. Preliminary validation of SMOS sea surface salinity measurements in the South China Sea., Chin. J. Ocean. Limnol. 33, 262–271 (2015). https://doi.org/10.1007/s00343-014-3338-5 DOI：

摘要

Abstract

The SMOS (soil moisture and ocean salinity) mission undertaken by the European Space Agency (ESA) has provided sea surface salinity (SSS) measurements at global scale since 2009. Validation of SSS values retrieved from SMOS data has been done globally and regionally. However

the accuracy of SSS measurements by SMOS in the China seas has not been examined in detail. In this study

we compared retrieved SSS values from SMOS data with in situ measurements from a South China Sea (SCS) expedition during autumn 2011. The comparison shows that the retrieved SSS values using ascending pass data have much better agreement with in situ measurements than the result derived from descending pass data. Accuracy in terms of bias and root mean square error (RMS) of the SSS retrieved using three different sea surface roughness models is very consistent

regardless of ascending or descending orbits. When ascending and descending measurements are combined for comparison

the retrieved SSS using a semi-empirical model shows the best agreement with in situ measurements

with bias −0.33 practical salinity units and RMS 0.74. We also investigated the impact of environmental conditions of sea surface wind and sea surface temperature on accuracy of the retrieved SSS. The SCS is a semi-closed basin where radio frequencies transmitted from the mainland strongly interfere with SMOS measurements. Therefore

accuracy of retrieved SSS shows a relationship with distance between the validation sites and land.

关键词

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references

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