Variation in Sunshine Duration and Related Aerosol Influences at Shangdianzi GAW Station, China: 1958–2021  

作　　者：Weijun QUAN Zhiqiang MA Ziming LI Xiaolan LI Yingruo LI Xiangao XIA Huaigang ZHOU Hujia ZHAO Zhenfa WANG Weiwei PU Fan DONG Di HE Liyan ZHOU Qingfeng SHI Wenyan WANG Fang JIA 

机构地区：[1]Beijing Weather Forecast Center,Beijing Meteorological Service,Beijing 100097 [2]Environmental Meteorology Forecast Center of Beijing–Tianjin–Hebei,Beijing Meteorological Service,Beijing 100097 [3]Institute of Urban Meteorology,China Meteorological Administration,Beijing 100089 [4]Institute of Atmospheric Environment,China Meteorological Administration,Shenyang 110116 [5]Key Laboratory of Middle Atmosphere and Global Environment Observation,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029

出　　处：《Journal of Meteorological Research》2023年第4期551-563,共13页气象学报（英文版）

基　　金：Supported by the China Scholarship Council (202205330024);National Key Research and Development Program of China (2017YFB0504002);National Science and Technology Infrastructure Platform Project (2017);Special Fund for Basic Scientific Research of Institute of Urban Meteorology (IUMKY201735)。

摘　　要：Sunshine duration(SD) is adopted widely to study global dimming/brightening. However, long-term simultaneous measurements of SD and closely related impact factors require further analysis to elucidate how and why SD has varied during the past decades. In this study, a long-term(1958–2021) SD data series obtained from the Shangdianzi Global Atmosphere Watch(GAW) station in China was analyzed to detect linear trends, climatic jumps, and climatic periods in SD using linear fitting, the Mann–Kendall trend test, and the continuous wavelet transform method. Annual SD exhibited steady dimming(-67.3 h decade-1) before 2010, followed by a period of brightening(189.9 h decade-1)during 2011–2020. An abrupt jump in annual SD occurred in 1995, and the annual SD anomaly exhibited significant oscillation with ~3-yr periodicity during 1960–1978. Partial least squares analysis revealed that annual SD anomaly was associated with variations in relative humidity, gale days, cloud cover, and black carbon(BC). Further analysis of the clear-sky daily sunshine percentage(DSP) and simultaneous measurements of aerosol properties, including aerosol optical depth, aerosol extinction coefficient, single scattering albedo(SSA), BC, and total suspended particulates, suggested that variation in DSP was affected primarily by aerosol scattering and absorption. Furthermore, the hourly clear-sky SD at high aerosol loading was approximately 60% and 56% of that at middle and low aerosol loadings, respectively. The pattern of diurnal variation in clear-sky hourly SD, as well as the actual values, can be affected by the fine particulate concentration, aerosol extinction coefficient, and SSA.

关 键 词：sunshine duration global dimming/brightening multitemporal-scale variation partial least squares Shangdianzi 

分 类 号：P467[天文地球—大气科学及气象学] P422.11