92nd American Meteorological Society Annual Meeting (January 22-26, 2012)

Tuesday, 24 January 2012
The Seasonal Evolution and Diurnal Tendencies of Mid-Day Cloudiness Over East Asia Based on MODIS Visible Imagery and Implications for Weather Forecasting
Hall E (New Orleans Convention Center )
Michael W. Douglas, NOAA/NSSL, Norman, OK; and A. Dominguez and R. Beida

MODIS visible channel imagery from the NASA Terra and Aqua satellites has been used to generate cloud climatologies at pixel resolutions of 5 km and 250 m. From monthly mean values we have generated a variety of seasonal to multi-annual products that are valuable for understanding the effects of topography and the diurnal cycle of sea-land and valley-mountain breezes. Such local and mesoscale effects - especially prominent over parts of eastern Asia, are subject to the strong seasonal circulation changes associated with the Asian monsoon. This poster will highlight aspects of the seasonal evolution and diurnal tendencies of cloudiness over select parts of east Asia. Since the diurnal cycle of solar radiation together with the local geography strongly modulates convective development and precipitation over this region these cloudiness patterns should be understood by the forecasting community of the region.

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