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Performance of SMAP and SMOS Salinity Products under Tropical Cyclones in the Bay of Bengal
| Content Provider | MDPI |
|---|---|
| Author | Xu, Huabing Shan, Yucai Xu, Guangjun |
| Copyright Year | 2022 |
| Description | To compare the accuracy of satellite salinity data of level-3 Soil Moisture Active Passive V4.0 $(S_{SMAP}$) and debiased v5 CATDS level-3 Soil Moisture and Ocean Salinity $(S_{SMOS}$) before and after tropical cyclones (TCs) in the Bay of Bengal (BoB), this study used the sea surface salinity of Argo $(S_{Argo}$) to assess $S_{SMAP}$ and $S_{SMOS}$ before and after the passage of 10 TCs from 2015 to 2019. The results indicate that the $S_{SMAP}$ and $S_{SMOS}$ agreed well with $S_{Argo}$ before and after 10 TCs. It can be seen that the correlation between $S_{SMAP}$ and $S_{Argo}$ (before TCs: $S_{SMAP}$ = $0.95S_{Argo}$ + 1.52, $R^{2}$ = 0.83; after TCs: $S_{SMAP}$ = $0.87S_{Argo}$ + 4.34, $R^{2}$ = 0.79) was obviously higher than that of $S_{SMOS}$ and $S_{Argo}$ (before TCs: $S_{SMOS}$ = $0.68S_{Argo}$ + 10.38, $R^{2}$ = 0.62; after TCs: $S_{SMOS}$ = $0.88S_{Argo}$ + 3.98, $R^{2}$ = 0.58). The root mean square error (RMSE) was also significantly higher between $S_{SMOS}$ and $S_{Argo}$ (before TCs: 0.84 psu; after TCs: 0.78 psu) than between $S_{SMAP}$ and $S_{Argo}$ (before TCs: 0.58 psu; after TCs: 0.47 psu). In addition, this study compared $S_{SMAP}$ and $S_{SMOS}$ during two TCs that swept in nearshore and offshore waters, and the results show good agreement between $S_{SMAP}$ and $S_{Argo}$ in the nearshore and offshore waters of BoB. In the BoB, both $S_{SMAP}$ and $S_{SMOS}$ can retrieve sea surface salinity well, and $S_{SMAP}$ is overall better than $S_{SMOS}$, but the SMOS salinity product can fill the gap of SMAP from 2010 to 2015. |
| Starting Page | 3733 |
| e-ISSN | 20724292 |
| DOI | 10.3390/rs14153733 |
| Journal | Remote Sensing |
| Issue Number | 15 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-08-04 |
| Access Restriction | Open |
| Subject Keyword | Remote Sensing Imaging Science Sea Surface Salinity Tropical Cyclone Smap Smos |
| Content Type | Text |
| Resource Type | Article |
