作者:Li, R (Li, Rui); Cai, HK (Cai, Hongke); Fu, YF (Fu, Yunfei); Wang, Y (Wang, Yu); Min, QL (Min, Qilong); Guo, JC (Guo, Jingchao); Dong, X (Dong, Xue)
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摘要:Through observations from the Cloud-Aerosol Lidar with Orthogonal Polarization onboard the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation, we detected a common feature of narrow and subvisible lateral boundary layer in cirrus cloud. In this layer the lidar backscatter, the depolarization ratio, the ice water content, the effective radius of ice particles, and the cloud optical depth all decrease sharply toward the cloud edge. In general, the width of this layer (6.4 +/- 3.1km over land) decreases with increasing ambient temperature. The estimated longwave radiative forcing associated with the layer is about 10W/m2. Due to its extremely small optical depth (less than 0.3), such lateral boundary layer may be missed by conventional satellite passive optical sensors. As a consequence, the mentioned radiative forcing has not been credited with its deserved share in the Earth's radiative energy budget.
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地址:[Li, Rui; Cai, Hongke; Fu, Yunfei; Wang, Yu; Guo, Jingchao; Dong, Xue] Chinese Acad Sci, Univ Sci & Technol China, Sch Earth & Space Sci, Key Lab Atmospher Composit & Opt Radiat, Hefei, Peoples R China.
[Li, Rui; Min, Qilong] SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12222 USA.
[Cai, Hongke] Chengdu Univ Informat Technol, Dept Atmospher Sci, Chengdu, Peoples R China.
[Min, Qilong] Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430072, Peoples R China.
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通讯作者地址:Fu, YF (通讯作者),Chinese Acad Sci, Univ Sci & Technol China, Sch Earth & Space Sci, Key Lab Atmospher Composit & Opt Radiat, Hefei, Peoples R China.
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