Moisture structure of ISO in Western North Pacific revealed by AIRS

Li Tao; Xiouhua Fu; Bin Wang

doi:10.1117/12.729294

24 September 2007 Moisture structure of ISO in Western North Pacific revealed by AIRS

Li Tao, Xiouhua Fu, Bin Wang

Proceedings Volume 6684, Atmospheric and Environmental Remote Sensing Data Processing and Utilization III: Readiness for GEOSS; 66840T (2007) https://doi.org/10.1117/12.729294
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

By using the humidity from AIRS data set, rainfall from TRMM GPI and wind from QSCAT wind as well as SST from Aqua/AMSR_E, We analyze the structure of summer intraseasonal oscillation (ISO) over western Pacific region in 2004. We find the signal of 20-90d oscillation in western Pacific originated from equatorial India ocean, which propagate eastward to Philippine sea, then propagate northwestward to south of China. The AIRS humidity data shows that the boundary layer moisture lead the mid-troposphere moisture during the ISO propagation. The positive SST anomaly may play an important role to moistening the boundary layer and induces the ISO propagation. Therefore, the intraseasonal SST anomaly could positively feed back to the atmosphere through moistening the boundary layer, destabilizing the troposphere, and contributing to the northwestward propagation of the ISO in western North Pacific. The character that the boundary moisture anomaly leads mid-troposphere moisture above ABL is not revealed by miosture depicted in ECMWF.

Citation Download Citation

Li Tao, Xiouhua Fu, and Bin Wang "Moisture structure of ISO in Western North Pacific revealed by AIRS", Proc. SPIE 6684, Atmospheric and Environmental Remote Sensing Data Processing and Utilization III: Readiness for GEOSS, 66840T (24 September 2007); https://doi.org/10.1117/12.729294

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