气候变化领域集成服务门户(CCPortal): Major ionic composition of precipitation in the Nam Co region, Central Tibetan Plateau

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DOI	10.1016/j.atmosres.2007.02.006
	Major ionic composition of precipitation in the Nam Co region, Central Tibetan Plateau
	Li, Chaoliu; Kang, Shichang; Zhang, Qianggong; Kaspari, Susan
发表日期	2007
ISSN	0169-8095
EISSN	1873-2895
起始页码	351
结束页码	360
卷号	85 期号:3-4
英文摘要	A total of 48 precipitation samples have been collected from individual precipitation events at the Nam Co Monitoring and Research Station for Multisphere Interactions (Nam Co Station, 30 degrees 47'N, 90 degrees 58'E; 4730 m a.s.l) located in the central Tibetan Plateau from August 2005 to August 2006. All samples were analyzed for major cations (NH4+, Na+, K+, Ca2+ and Mg2+) and anions (Cl-, NO3- and SO42- conductivity and pH. Precipitation pH values ranged from 6.03 to 7.38 with an average value of 6.59. The high PH is due to large inputs of crustal aerosols in the atmosphere, which contain a large fraction of carbonate. Ca2+ is the dominant cation in precipitation with an average value of 65.58 mu eq L-1 (4.91-301.41 mu eq L-1), accounting for 54% of the total cations in precipitation. HCO3- is the predominant anion, accounting for 62% of the total anions. When compared with data from a snow pit in the Zhadang Glacier 50 km away (5800 in a.s.l), major ion concentration in precipitation at the Nam Co Station is much higher due to local aerosol inputs. Correlation and empirical orthogonal function (EOF) analysis indicate that regional crustal aerosols and species from combustion emissions of residents are the major sources for these ions, lake salt aerosols from the Nam Co nearby and regional mineral aerosols from dry lake sediments are secondary sources, and sea salt contribution is the least due to the long distance transport. (C) 2007 Elsevier B.V. All rights reserved.
关键词	CHEMICAL-COMPOSITION ATMOSPHERIC CIRCULATION MT. EVEREST LONG-TERM ICE CORE CHEMISTRY DUST RAINWATER MONSOON RECORDS
英文关键词	China; precipitation chemistry; EOF analysis; crustal aerosols
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000249482200006
来源期刊	ATMOSPHERIC RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111481
推荐引用方式 GB/T 7714	Li, Chaoliu,Kang, Shichang,Zhang, Qianggong,et al. Major ionic composition of precipitation in the Nam Co region, Central Tibetan Plateau[J]. 中国科学院青藏高原研究所,2007,85(3-4).
APA	Li, Chaoliu,Kang, Shichang,Zhang, Qianggong,&Kaspari, Susan.(2007).Major ionic composition of precipitation in the Nam Co region, Central Tibetan Plateau.ATMOSPHERIC RESEARCH,85(3-4).
MLA	Li, Chaoliu,et al."Major ionic composition of precipitation in the Nam Co region, Central Tibetan Plateau".ATMOSPHERIC RESEARCH 85.3-4(2007).