Uncertainty of the Arctic Sea Surface Salinity: from evaluation to assimilation

Speaker: 
Jiping Xie (Ocean Modelling)
Seminar Date: 
10. September 2019 - 11:15 - 11:45
Location: 
Lecture room, Ground Floor, NERSC

Monitoring the Arctic Sea Surface Salinity (SSS) from space is crucial to understand the global water cycle and the ocean dynamics is limited due to nonhomogeneous and sparse in situ data. Two gridded satellite SSS products have been derived from European Space Agency’s Soil Moisture and Ocean Salinity mission (SMOS). The uncertainties of these two SSS products in the Arctic are quantified against other two SSS products in the Copernicus Marine Environment Monitoring Services and other in situ datasets. The results compared with independent in situ data clearly show a common challenge for six SSS products to represent freshwater masses (<24 psu) in the central Arctic. It is also quite useful to indicate the observation error variance applied in the following assimilation experiments.