干旱区生态环境知识资源中心(Arid): Quantifying depression trapping effect on rainwater chemical composition during the rainy season in karst agricultural area, southwestern China

Arid

DOI	10.1016/j.atmosenv.2019.116998
	Quantifying depression trapping effect on rainwater chemical composition during the rainy season in karst agricultural area, southwestern China
	Zeng, Jie 1; Yue, Fu-Jun 2,3,4,5; Wang, Zhong-Jun 5,6; Wu, Qixin 7; Qin, Cai-Qing 2; Li, Si-Liang 2,4,5
通讯作者	Yue, Fu-Jun
来源期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
EISSN	1873-2844
出版年	2019
卷号	218
英文摘要	Atmospheric wet deposition is a vital part of biogeochemical cycles in earth surface environment systems, which is not only controlled by local sources and long-range transported continental substances from natural and anthropogenic sources, but also potentially influenced by the topographical features (e.g. peak clusters and depressions in karst areas). To investigate the depression trapping effect of vertical distribution of rainwater chemical composition and evaluate the effect of trapping by depression on wet deposition flux, rainwater samples from two sites (HR, a hilltop shrubbery area, and LR, inside a depression paddy field area) of a karst agricultural depression in Southwest China, were collected during the rainy season. From these, the major ionic concentrations were measured. The results indicated a variance in pH from 4.8 to 6.4 with a volume-weighted mean (VWM) value of 5.7 at the HR, and, a range of 5.4-6.9 with a VWM of 6.0 at the LR. The VWM concen- trations of ions were decreased in the order of SO42- > NH4+ > Ca-2(+) > NO3- > Mg2+ > K+ >Na+ > Cl- > F- at both sites, and were dominated by SO42-, NH4+, Ca-2(+), and NO3-, accounting for >87% of the total ions at the two sites. The result of fractional acidity (FA) and neutralization factors (NF) revealed that the relatively high pH values were the result of neutralization of the alkaline substances (NH4+ and Ca-2(+)) rather than the scarcity of acidic materials. Source analysis of major ions showed that anions were predominantly controlled by anthropogenic emission, while cations originated from both terrestrial sources and anthropogenic activity. The vertical distribution of dominant ions (NH4+, NO3- Ca2+, Mg2+, and SO42-) were ascribed to the relatively weak air convection movement within the depression area (specific atmospheric circulations) and the differences in human interference at two sites (LR, cultivated land; HR, luxuriant vegetation). This is further supported by the more negative rainwater delta(15) N-NO3- values (-8.5 to -6.0 parts per thousand), in LR than that in HR (-6.2 to -3.4 parts per thousand). The depression trapping effect could significantly affect the estimation of wet deposition fluxes (up to 80.6% for Ca2+ and 68.7% for NH4+), which requires consideration in future studies, e.g. N wet deposition.
英文关键词	Major ions Rainwater Wet deposition rate Nitrate isotopes Karst Depression trapping effect
类型	Article
语种	英语
国家	Peoples R China ; Scotland
收录类别	SCI-E
WOS记录号	WOS:000501650100009
WOS关键词	NITROGEN ISOTOPIC COMPOSITION ; GUIZHOU PROVINCE ; WET DEPOSITION ; ATMOSPHERIC CIRCULATIONS ; PRECIPITATION CHEMISTRY ; SOURCE APPORTIONMENT ; EASTERN CARPATHIANS ; DESERT PLATEAU ; AIR-POLLUTION ; RIVER-BASIN
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
EI主题词	2019-12-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311410
作者单位	1.China Univ Geosci Beijing, Inst Earth Sci, Beijing 100083, Peoples R China; 2.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China; 3.Univ Glasgow, Sch Geog & Earth Sci, Glasgow G12 8QQ, Lanark, Scotland; 4.Tianjin Univ, Tianjin Key Lab Earth Crit Zone Sci & Sustainable, Tianjin 300072, Peoples R China; 5.Chinese Acad Sci, Inst Geochem, Puding Karst Ecosyst Res Stn, Anshun 562100, Peoples R China; 6.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Guizhou, Peoples R China; 7.Guizhou Univ, Minist Land & Resources, Key Lab Karst Environm & Geohazard, Guiyang 550025, Guizhou, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Jie,Yue, Fu-Jun,Wang, Zhong-Jun,et al. Quantifying depression trapping effect on rainwater chemical composition during the rainy season in karst agricultural area, southwestern China[J],2019,218.
APA	Zeng, Jie,Yue, Fu-Jun,Wang, Zhong-Jun,Wu, Qixin,Qin, Cai-Qing,&Li, Si-Liang.(2019).Quantifying depression trapping effect on rainwater chemical composition during the rainy season in karst agricultural area, southwestern China.ATMOSPHERIC ENVIRONMENT,218.
MLA	Zeng, Jie,et al."Quantifying depression trapping effect on rainwater chemical composition during the rainy season in karst agricultural area, southwestern China".ATMOSPHERIC ENVIRONMENT 218(2019).