干旱区生态环境知识资源中心(Arid): Ca and Sr isotope compositions of rainwater from Guiyang city, Southwest China: Implication for the sources of atmospheric aerosols and their seasonal variations

Arid

DOI	10.1016/j.atmosenv.2019.116854
	Ca and Sr isotope compositions of rainwater from Guiyang city, Southwest China: Implication for the sources of atmospheric aerosols and their seasonal variations
	Han, Guilin 1; Song, Zhaoliang 2; Tang, Yang 3; Wu, Qixin 4; Wang, Zhengrong 5
通讯作者	Han, Guilin
来源期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
EISSN	1873-2844
出版年	2019
卷号	214
英文摘要	Rainwater samples collected from Guiyang city in southwestern China between May 2009 and December 2010 were analyzed to measure their calcium and strontium isotope compositions. The results show that Ca2+ is the most abundant cation in these rainwater samples, while SO42- is the most abundant anion. Most rainwater samples are alkaline, with a volume-weighted mean (VWM) pH value of similar to 6.2 (a 1.2-unit increase since 2008). This can be explained by the neutralization of rainwater acidity by the dissolution of atmospheric aerosols in the form of calcium-rich soil and other anthropogenic dust, which are increasing because of rapid urbanization. Both stable (delta Ca-44/40 and delta(88)/Sr-86) and radiogenic (Sr-87/Sr-86) isotope compositions of rainwater show variations correlating with each other and with the inverse of Sr or Ca concentrations. They also correlated with the concentration ratio of (NH4+ + K+)/(Ca2+ + Mg2+)-an index reflecting the anthropogenic input relative to soil dust. Based on our results, three major reservoirs can be inferred to have contributed to rainwater chemistry in Guiyang city: (1) a carbonate aerosol source characterized by low Sr-87/Sr-86 (<=similar to 0.708), delta Sr-88/86 (<= similar to 0.32 parts per thousand) and delta Ca-44/40 (similar to 0.5 parts per thousand), very low (NH4+ + K+) / (Ca2+ + Mg2+), and low 1/Ca2+ and 1/Sr2+; (2) a silicate aerosol source characterized by relatively high Sr-87/Sr-86 (>= 0.717), delta Sr-88/86 (>=similar to 0.34 parts per thousand) and delta Ca-44/40 (similar to 0.8 parts per thousand), very low (NH4+ + K+) / (Ca2+ + Mg2+), low 1/Ca2+ and 1/Sr2+; and (3) an anthropogenic component containing low 87Sr/86Sr (similar to 0.708), delta Sr-88/86 (similar to 0.30 parts per thousand) and high delta Ca-44/40 (similar to 0.8 parts per thousand), and high (NH4+ + K+) / (Ca2+ + Mg2+). The chemistry of solutes in Guiyang rainwater can be explained by (1) dissolution of carbonate and silicate aerosols, as well as the anthropogenic inputs including seasonal farming activities; (2) tightened environmental protection regulations; (3) higher precipitation volumes in 2010; and possibly (4) the increased combustion of coal for heating and electricity in winter. This study demonstrated that a combination of elemental compositions, stable Ca and Sr, and radiogenic Sr isotope compositions in rainwater can be used to trace the sources of atmospheric aerosols.
英文关键词	Ca stable isotope Sr stable isotope Radiogenic Sr isotope Rainwater Southwest China
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000487167900026
WOS关键词	STRONTIUM ISOTOPE ; CHEMICAL-COMPOSITION ; WEATHERING PROCESSES ; MAJOR ION ; RADIOGENIC SR-87/SR-86 ; CALCIUM ISOTOPES ; GUIZHOU PROVINCE ; DESERT PLATEAU ; PRECIPITATION ; GEOCHEMISTRY
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214511
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.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, Peoples R China; 4.Guizhou Univ, Minist Educ, Key Lab Karst Environm & Geohazard Prevent, Guiyang 550003, Guizhou, Peoples R China; 5.CUNY, Dept Earth & Atmospher Sci, New York, NY 10031 USA
推荐引用方式 GB/T 7714	Han, Guilin,Song, Zhaoliang,Tang, Yang,et al. Ca and Sr isotope compositions of rainwater from Guiyang city, Southwest China: Implication for the sources of atmospheric aerosols and their seasonal variations[J],2019,214.
APA	Han, Guilin,Song, Zhaoliang,Tang, Yang,Wu, Qixin,&Wang, Zhengrong.(2019).Ca and Sr isotope compositions of rainwater from Guiyang city, Southwest China: Implication for the sources of atmospheric aerosols and their seasonal variations.ATMOSPHERIC ENVIRONMENT,214.
MLA	Han, Guilin,et al."Ca and Sr isotope compositions of rainwater from Guiyang city, Southwest China: Implication for the sources of atmospheric aerosols and their seasonal variations".ATMOSPHERIC ENVIRONMENT 214(2019).