Impact Study of the Assimilation of Surface Sensitive Microwave Radiances in the GEOS

Ebrahimi, Hamideh ; Mccarty, William R ; Akella, Santharam

关键词: ADVANCED MICROWAVE SOUNDING UNIT;    ASSIMILATION;    ATMOSPHERIC TEMPERATURE;    BRIGHTNESS TEMPERATURE;    EARTH OBSERVING SYSTEM (EOS);    GEOS SATELLITES (ESA);    MICROWAVE IMAGERY;    MICROWAVE RADIOMETERS;    MOISTURE CONTENT;    PRECIPITATION (METEOROLOGY);    PRECIPITATION MEASUREMENT;    SEA SURFACE TEMPERATURE;    STATISTICAL ANALYSIS;    TEMPERATURE PROFILES;   

RP-ID  :  GSFC-E-DAA-TN69257

学科分类：地球科学(综合)

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The aim of this study is to investigate the feasibility of assimilating low-frequency microwave observations from different satellite Microwave radiometers such as the Advanced Microwave Sounding Unit-A (AMSU-A), Global Precipitation Measurement (GPM) Microwave Imager (GMI), and Advanced Microwave Scanning Radiometer 2 (AMSR2). These observations are relevant to the description of air temperature, humidity, and surface parameters such as ocean surface temperature. Their assimilation into Goddard Earth Observing System (GEOS) modeling and assimilation system helps better constrain models in regions where very few observations are assimilated. In recent years, surface sensitive channels have not been assimilated in GEOS because of their large sensitivities to uncertain surface parameters such as emissivity and skin temperature.