干旱区生态环境知识资源中心(Arid): Observed levels and trends of gaseous SO_2 and HNO_3 at Mt.Waliguan,China:Results from 1997 to 2009

Arid

	Observed levels and trends of gaseous SO_2 and HNO_3 at Mt.Waliguan,China:Results from 1997 to 2009
	Lin Weili; Xu Xiaobin; Yu Xiaolan; Zhang Xiaochun; Huang Jianqing
来源期刊	Journal of Environmental Sciences
ISSN	1001-0742
出版年	2013
卷号	25 期号:4 页码:726-734
英文摘要	Long-term measurements of SO_2 and HNO_3,particularly those from the background sites,are rarely reported.We present for the first time the long-term measurements of SO_2 and HNO_3 at Waliguan(WLG),the only global baseline station in the back-land of the Eurasian Continent.The concentrations of SO_2 and HNO_3 were observed at WLG from 1997 to 2009.The observed annual mean concentrations of SO_2 and HNO_3 at WLG were 1.280.41 and 0.220.19mug/m3,respectively.The HNO_3 concentrations were much higher in warmer seasons than in colder seasons,while the SO_2 concentrations showed a nearly reversed seasonal pattern.In most months,the concentration of HNO_3 was significantly correlated with that of SO_2,suggesting that some common factors influence the variations of both gases and the precursors of HNO_3 may partially be from the SO_2-emitting sources.The SO_2 concentration had a very significant(P < 0.0001) decreasing trend(-0.2mug/(m~3·yr)) in 1997-2002,but a significant(P < 0.05) increasing trend(+0.06 mug/(m ~3 ·yr)) in 2003-2009.The HNO_3 concentration showed no statistically significant trend during 1997-2009.While the decrease of SO_2 in 1997-2002 agrees with the trend of global SO_2 emissions,the increase in 2003-2009 is not consistent with the decreasing trends in many other regions over the world.Trajectory analysis suggests that the airmasses from the northern Qinghai-Tibetan Plateau and the Takla Makan Desert regions contributed significantly to the increasing trends of SO_2 and HNO_3 at WLG in 2003-2009,with a rate of +0.13mug/(m~3·yr) and +0.007mug/(m~3·yr),respectively.
英文关键词	SO_2 HNO_3 long-term trends Waliguan global baseline
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:4805462
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335196
作者单位	Lin Weili, Centre for Atmosphere Watch and Services, Meteorological Observation Centre, China Meteorological Administration, State Key Laboratory for Atmospheric Chemistry, Beijing 100081, China.; Xu Xiaobin, Chinese Academy of Meteorological Sciences, State Key Laboratory for Atmospheric Chemistry, Beijing 100081, China.; Yu Xiaolan, Chinese Academy of Meteorological Sciences, State Key Laboratory for Atmospheric Chemistry, Beijing 100081, China.; Zhang Xiaochun, Centre for Atmosphere Watch and Services, Meteorological Observation Centre, China Meteorological Administration, Beijing 100081, China.; Huang Jianqing, Waliguan Observatory, Xining, Qinghai 810000, China.
推荐引用方式 GB/T 7714	Lin Weili,Xu Xiaobin,Yu Xiaolan,et al. Observed levels and trends of gaseous SO_2 and HNO_3 at Mt.Waliguan,China:Results from 1997 to 2009[J],2013,25(4):726-734.
APA	Lin Weili,Xu Xiaobin,Yu Xiaolan,Zhang Xiaochun,&Huang Jianqing.(2013).Observed levels and trends of gaseous SO_2 and HNO_3 at Mt.Waliguan,China:Results from 1997 to 2009.Journal of Environmental Sciences,25(4),726-734.
MLA	Lin Weili,et al."Observed levels and trends of gaseous SO_2 and HNO_3 at Mt.Waliguan,China:Results from 1997 to 2009".Journal of Environmental Sciences 25.4(2013):726-734.