Semitransparent cirrus clouds in the tropical tropopause layer during two contrasting seasons
作者： S.V. Sunilkumar , K. Parameswaran , K. Rajeev , B.V. Krishna Murthy , S. Meenu
DOI: 10.1016/J.JASTP.2010.03.020
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摘要: Abstract Association between semitransparent cirrus (STC) and tropospheric dynamics during the two contrasting seasons (Summer-monsoon Winter) is studied using lidar MST radar observations at Gadanki (13.5°N, 79.2°E) along with data from Geo-stationary satellite (KALPANA-1). The tropical tropopause layer (TTL) found to be very conducive for formation of STC. For those thicker STCs forming within TTL, cloud top remains mostly steady while base varies significantly in accordance altitude extent convective outflow. Based on depolarization characteristics (from lidar) regional distribution clouds derived data, profile horizontal wind, wind field 150 hPa air mass back trajectories, it can reasonably inferred that, multi-layered highly structured monsoon period originate deep convections, sub-visual/ultra thin winter could situ origin.
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