Based on the fact that the turning point of aerosol variation has occurred since 2012， two time series of climatological data were set by the period last to 2011 and that to 2018 from the available.The used data is daily of 14:00 （Beijing Time） in summer season last more than 40 years from selected unmigrated 133 meteorological stations.The annual variability of wind speed， temperature and sea-level pressure in the mid-latitude of China were analyzed and compared between two time series.Also the spatial distribution and annual variability of AOD were analyzed and were correlated with that of wind speed， temperature and pressure with the data of MODIS aerosol optical thickness （AOD） product from 2002 to 2018.The results show that： （1） AOD was small over the Qinghai-Xizang plateau （QXP）， and was large over the Qing-ba mountainous area and inland plain with increasing trend from 2002 to 2011 and turning decrease from 2002 to 2018， which suggests the effectiveness of air-pollution control after 2012.（2） Before 2012， the temperature increased in QXP and the western Qing-ba mountainous area， and declined in the eastern Qing-ba mountainous area and the inland plain and with maximum decreasing around 114°E.Compared with that of time series to 2018， the extent of temperature decrease and pressure increases lightly declined during AOD decreasing， which reflects the respondence of temperature and pressure to AOD.（3） The wind speed in summer was generally decreasing， especially in the inland plain with the largest annual reduction rate of -0.06~-0.02 m·s-1.Also the annual variability of wind speed was reverse to that of AOD distribution.It was shown that the decreasing extent of wind speed was modulated by declination of average AOD by the comparison of two time series， which suggests the sensitivity of wind speed to aerosol variation.
Xiaohong XU
,
Xing YU
,
Yannian ZHU
,
Jin DAI
,
Zipeng DONG
. Impact of Aerosol on the Summer Wind Speed at the Lower Layer in the Mid-Latitude of China[J]. Plateau Meteorology, 2021
, 40(2)
: 367
-373
.
DOI: 10.7522/j.issn.1000-0534.2020.00037
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