Depolarization Property of Cirrus Clouds Over Hanoi


  • Tien Pham Minh Ho Chi Minh City Institute of Physics, Vietnam Academy of Science and Technology, No 1 Mac Dinh Chi, Ben Nghe, District 1, Ho Chi Minh City, Vietnam and Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam
  • Tuan Nguyen Xuan Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
  • Trung Dinh Van Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
  • Manh Le Duy Institute of Research and Development, Duy Tan University, No. 3 Quang Trung, Da Nang, Vietnam
  • Hai Bui Van Le Quy Don Technical University, 236 Hoang Quoc Viet, North Tu Liem, Hanoi, Vietnam



lidar, atmosphere, depolarization


Cirrus cloud is one of the most commonly occurring cloud types globally. The clouds are found mainly to consist of floating ice crystals, which can reflect strongly incoming radiation. Lidar measurements provide an opportunity to study the microphysics and ice compositions of cirrus clouds. We have developed a polarization lidar system to measure the depolarization characteristics of the lower atmosphere over Hanoi. From our measurements of cirrus clouds over the period from 2010 to 2012, the depolarization ratio of cirrus clouds is found to be very high ranging from 20% up to 80{\%}, indicating large fraction of backscattering from ice crystals. We find a trend of increasing depolarization ratio with height and decreasing temperature. We also compare our lidar measurements with other results obtained by lidar technique in other regions of the world.


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How to Cite

Pham Minh, T., Nguyen Xuan, T., Dinh Van, T., Le Duy, M., & Bui Van, H. (2017). Depolarization Property of Cirrus Clouds Over Hanoi. Communications in Physics, 27(4), 339.