Wednesday, 9 January 2019
Hall 4 (Phoenix Convention Center - West and North Buildings)
Based on the data GPS sounding in July 2017 in Tazhong station in the Hinterland of Taklimakan Desert, which is located in the Xinjiang Province of West China, the desert summer boundary layer structure characteristics were analyzed in this paper. The results showed that the month average thickness of the mixed layer (ML) in the daytime was 3100 m. At night, the month average thickness of stable boundary layer (SBL) was 570 m. An average thickness of residual mixed layer (RML) was 2700 m, and the average thickness of residual cover inversion layer (RCIL) was 350 m. In clear day, the thickness of mixed layer (ML) generally exceeded 5200 m and stable boundary layer (SBL) thickness was 500 m. Residual mixing layer (RML) which thickness was 5000 m could be observed clearly at night. Further analysis showed that a deep mixed layer (ML) in the daytime is a precondition for maintaining a deep Residual mixing layer (RML) in the nighttime. Meanwhile, a deep Residual mixing layer (RML) in the nighttime provides a favorable thermal condition for the development of the mixed layer (ML) in the daytime. During dust storms, the structural characteristics of the boundary layer were destroyed. The dust can inhibit the formation and development of the mixed layer (ML) in the daytime and the stable boundary layer (SBL) at night, but relatively complete Residual mixing layer (RML) still existed in the high layer.
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