Inter-comparison of seasonal variability and nonlinear trend between AERONET aerosol optical depth and PM10 mass concentrations in Hong Kong

doi:10.1007/s11430-014-4874-8

	Inter-comparison of seasonal variability and nonlinear trend between AERONET aerosol optical depth and PM10 mass concentrations in Hong Kong
	He JingJing; Zhang Min; Chen XianYao; Wang Meng
刊名	SCIENCE CHINA-EARTH SCIENCES
	2014-11
卷号	57 期号:11 页码:2606-2615
关键词	PM10 aerosol optical depth (AOD) empirical mode decomposition (EMD) seasonal variability nonlinear trend
ISSN号	1674-7313
DOI	10.1007/s11430-014-4874-8
英文摘要	Here we used Empirical Mode Decomposition (EMD) method to study seasonal variability and nonlinear trend of corrected AERONET Aerosol Optical Depth (AOD/Hi) and corrected PM10 mass concentrations (PM(10)xf(RH)) in Hong Kong during 2005-2011. AOD/Hi is highly correlated with PM(10)xf(RH) in semi-annual and annual time scales (with correlation coefficient 0.67 for semi-annual and 0.79 for annual components, 95% confidence interval). On the semi-annual scale, both AOD/Hi and PM(10)xf(RH) can capture the two maxima in March and October, respectively, with much stronger amplitude in March probably due to the long-range transport of dust storm. On the annual cycle, the AOD/Hi and PM(10)xf(RH), which are negatively correlated with the precipitation and solar radiation, vary coherently with the maxima in February. This annual peak occurs about one month earlier than the first peak of the semi-annual variability in March, but with only half amplitude. During 2005-2011, both AOD/Hi and PM(10)xf(RH) exhibit the pronounced decreasing trend with the mean rate of 14 mu g m(-3) per year for PM(10)xf(RH), which reflects the significant effects of the air pollution control policy in Hong Kong during the past decade. The nonlinear trend analysis indicates that the decreasing of PM(10)xf(RH) is slower than that of AOD/Hi when the AOD/Hi is less than 0.44 but becomes faster when the AOD/Hi exceeds 0.44. These results illustrate that the AERONET AOD can be used quantitatively to estimate local air-quality variability on the semi-annual, annual, and long-term trend time scales.
资助项目	Public Science and Technology Research Funds Projects of Ocean[201105019]
WOS关键词	EMPIRICAL MODE DECOMPOSITION ; DUST STORMS ; CHINA
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000344784400004
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/27147]
专题	自然资源部第一海洋研究所
通讯作者	Chen XianYao
作者单位	State Ocean Adm, Inst Oceanog 1, Key Lab Data Anal & Applicat, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	He JingJing,Zhang Min,Chen XianYao,et al. Inter-comparison of seasonal variability and nonlinear trend between AERONET aerosol optical depth and PM10 mass concentrations in Hong Kong[J]. SCIENCE CHINA-EARTH SCIENCES,2014,57(11):2606-2615.
APA	He JingJing,Zhang Min,Chen XianYao,&Wang Meng.(2014).Inter-comparison of seasonal variability and nonlinear trend between AERONET aerosol optical depth and PM10 mass concentrations in Hong Kong.SCIENCE CHINA-EARTH SCIENCES,57(11),2606-2615.
MLA	He JingJing,et al."Inter-comparison of seasonal variability and nonlinear trend between AERONET aerosol optical depth and PM10 mass concentrations in Hong Kong".SCIENCE CHINA-EARTH SCIENCES 57.11(2014):2606-2615.