气候变化领域集成服务门户(CCPortal): Concentrations, Compositions, and Deposition Rates of Dissolved Nitrogen in Western China: Insights From Snow Records

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DOI	10.3389/fenvs.2021.827456
	Concentrations, Compositions, and Deposition Rates of Dissolved Nitrogen in Western China: Insights From Snow Records
	An, Yanqing; Xu, Jianzhong; Liu, Yanmei; Li, Xiaofei; Zhao, Huabiao; Kang, Shichang
通讯作者	Xu, JZ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm Resources, State Key Lab Cryospher Sci, Lanzhou, Peoples R China.
发表日期	2022
EISSN	2296-665X
卷号	9
英文摘要	Atmospheric nitrogen deposition is an important contributor to global and regional nitrogen cycles, and atmospheric nitrogen could be a critical limit nutrient for remote areas. In this study, nitrogen species compositions, deposition fluxes, and historical records in the mountains of Western China, including the Tibetan Plateau, were determined from snowpit and ice core samples collected from mountain glaciers. The mean concentration of total dissolved nitrogen (TDN) in the snowpit samples was 12.6 mu mol L-1 (8.0-17.8 mu mol L-1) and comprised 59% ammonium nitrogen, 35% nitrate nitrogen, and similar to 6% dissolved organic nitrogen. The deposition of nitrogen species, except organic nitrogen (likely due to its low concentrations and/or different origination), varied seasonally in a similar way based on the records of the snowpit profile. Based on monthly surface sample collection in one of the glaciers, the mass concentration and composition of nitrogen species varied monthly, mainly because of melting processes. During melting, the inorganic nitrogen content could be lost significantly, whereas the dissolved organic nitrogen concentration could be enriched because of microbial activity. For the historical records, the nitrogen deposition in mountain areas of Western China after 1960s was increased by about one time of that during 1900-1950 and was dominated by ammonium-N. From the snowpit data, we estimated the total dissolved nitrogen deposition flux at 0.56-1.3 (mean 0.88) kg ha(-1) a(-1) in the mountain area of Western China. These results could improve our understanding of nitrogen deposition and cycle in the mountain areas of Western China.
关键词	ICE CORE RECORDS INORGANIC NITROGEN TIBETAN PLATEAU MOUNTAIN GLACIERS WET DEPOSITION DUST CLIMATE AMMONIA PARTICLES CHEMISTRY
英文关键词	nitrogen deposition; mountain glacier; Western China; Tibetan plateau; ice core
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000759850400001
来源期刊	FRONTIERS IN ENVIRONMENTAL SCIENCE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253877
作者单位	[An, Yanqing; Xu, Jianzhong; Liu, Yanmei; Li, Xiaofei; Kang, Shichang] Chinese Acad Sci, Northwest Inst Ecoenvironm Resources, State Key Lab Cryospher Sci, Lanzhou, Peoples R China; [Zhao, Huabiao] Chinese Acad Sci, Inst Tibetan Plateau Res, Ngari Stn Desert Environm Observat & Res, Beijing, Peoples R China
推荐引用方式 GB/T 7714	An, Yanqing,Xu, Jianzhong,Liu, Yanmei,et al. Concentrations, Compositions, and Deposition Rates of Dissolved Nitrogen in Western China: Insights From Snow Records[J]. 中国科学院西北生态环境资源研究院,2022,9.
APA	An, Yanqing,Xu, Jianzhong,Liu, Yanmei,Li, Xiaofei,Zhao, Huabiao,&Kang, Shichang.(2022).Concentrations, Compositions, and Deposition Rates of Dissolved Nitrogen in Western China: Insights From Snow Records.FRONTIERS IN ENVIRONMENTAL SCIENCE,9.
MLA	An, Yanqing,et al."Concentrations, Compositions, and Deposition Rates of Dissolved Nitrogen in Western China: Insights From Snow Records".FRONTIERS IN ENVIRONMENTAL SCIENCE 9(2022).