Assimilation of CrIS hyperspectral radiances in a 4D-Var assimilation system

Swapan Mallick; Indira Rani S.; Desamsetti Srinivas; John P. George

doi:10.1117/12.2222775

30 April 2016 Assimilation of CrIS hyperspectral radiances in a 4D-Var assimilation system

Swapan Mallick, Indira Rani S., Desamsetti Srinivas, John P. George

Proceedings Volume 9880, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications VI; 98800Q (2016) https://doi.org/10.1117/12.2222775
Event: SPIE Asia-Pacific Remote Sensing, 2016, New Delhi, India

Abstract

This study demonstrates the advantage of the assimilation of Cross-track Infrared Sounder (CrIS) radiances of the Suomi-NPP satellite observation using 4D-Var assimilation system with global NCMRWF Unified Model (NCUM). The observation pre-processing system, quality control and thinning strategy for CrIS observations in addition to the impact of this observation in the analysis also discussed. Observation bias statistics are computed against the NCUM model fields from a short-range forecast (background) for quality control. The impact on forecasts is evaluated using “Observing System Simulation Experiments (OSSE's)”. The combined effect of hyperspectral and microwave radicalizes. The results show that CrIS data reduces the total number of observations and increases the RMS values for hyperspectral radiances.

Citation Download Citation

Swapan Mallick, Indira Rani S., Desamsetti Srinivas, and John P. George "Assimilation of CrIS hyperspectral radiances in a 4D-Var assimilation system", Proc. SPIE 9880, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications VI, 98800Q (30 April 2016); https://doi.org/10.1117/12.2222775

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