Based on the lidar (CE-370-2) data from 2006 to 2011 which is provided by the team of Semi-Arid Climate and Environment Observatory of Lanzhou University, the vertical profiles of aerosol extinction coefficient (AEC) are analyzed. The results show: aerosols are concentrated below 2 km of which 60% distribute within 1 km; the values of extinction coefficient become high from 00:00(Beijing Time, hereafter the same) to 12:00 with the peak at 12:00, later they become low; the heights of aerosol concentrated distribution in summer and autumn are respectively 3 km and 2.5 km, while 2 km and 1.5 km in spring and winter respectively; in low troposphere (below 2 km) the seasonal distribution of AEC is that the range of AEC is from 0.20 to 0.85 km-1, holding 92% in winter; in spring the range of AEC is from 0.05 to 0.45, holding 88%; in autumn its range is from 0.02 to 0.2 km-1, holding 82%; and in summer its range is from 0.04 to 0.08 km-1, holding 70%; in dust periods, aerosols can penetrate up to 6 km or more higher; in strong dust processes, the height of lidar valid detection is below 2 km; the retrieval of extinction coefficient shows interruptions phenomena. The vertical profile evolvement of aerosol extinction coefficient is consistent with the change trend of atmosphere boundary layer vertical structure.
ZHOU Bi
,
ZHANG Lei
,
SUI Bing
,
JIANG Deming
,
CAO Xianjie
,
LI Xia
,
LIU Zhixiong
. Detection of Aerosol Vertical Distribution Using Lidar in Lanzhou District[J]. Plateau Meteorology, 2014
, 33(6)
: 1545
-1550
.
DOI: 10.7522/j.issn.1000-0534.2013.00135
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