Impact of Satellite Sea Surface Salinity Observations on ENSO Predictions from the GEOS GMAO S2S Forecast System

Hackert, E ; Kovach, R ; Marshak, J ; Borovikov, A ; Molod, A ; Vernieres, G ; Pawson, S

关键词: ASSIMILATION;    FORECASTING;    OCEAN SURFACE;    SALINITY;    SATELLITE OBSERVATION;    SOUTHERN OSCILLATION;    DEPTH;    EL NINO;    KELVIN WAVES;    SATELLITE INSTRUMENTS;   

RP-ID  :  GSFC-E-DAA-TN61307

学科分类：地球科学(综合)

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

We assess the impact of satellite sea surface salinity (SSS) observations on dynamical ENSO forecasts. Assimilation of SSS improves the mixed layer depth (MLD) and modulates the Kelvin waves associated with ENSO. In column 2, the initialization differences between experiments that assimilate SSS minus those withholding SSS assimilation are presented. Column 3 shows examples of forecasts generated for the different phases of ENSO. From March to June 2015, the availability of two overlapping satellite SSS instruments, Aquarius and SMAP, allows a unique opportunity to compare and contrast coupled forecasts generated with the benefit of these two satellite SSS observation types. The far right column compares assimilation of Aquarius, SMAP and combined Aquaries and SMAP on forecasts for the 2015 El Nino.