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Temporal characteristics and vertical profiles of atmospheric CH4 at the northern foot of the Qinling Mountains in China

文献类型：期刊论文

作者Liu, Wanyu7,8; Feng, Xue5; Niu, Zhenchuan2,4,6,8; Zhou, Weijian2,8; Chen, Huilin1,3; Liang, Dan5; Lyu, Mengni5; Wang, Guowei5; Liu, Lin7
刊名ATMOSPHERIC ENVIRONMENT
出版日期2024-11-15
卷号337页码:12
关键词Methane Temporal characteristics Unmanned aerial vehicle Vertical profiles Horizontal transport Qinling mountains
ISSN号1352-2310
DOI10.1016/j.atmosenv.2024.120786
通讯作者Niu, Zhenchuan(niuzc@ieecas.cn)
英文摘要A two-year (March 2021 to February 2023) continuous in-situ atmospheric CH4 measurements and periodic vertical CH4 measurements (<2000 m) in July and November 2021 were conducted at the northern foot of the Qinling Mountains in Xi'an, China, aiming to study the temporal and vertical variations in atmospheric CH4 and the influence of air mass transport. The two-year average CH4 concentration at this site was 2119.6 +/- 108.8 ppb. Seasonal CH4 concentrations were the highest in winter (2177.6 +/- 121.5 ppb) and lower in summer (2079.1 +/- 77.6 ppb) and spring (2073.9 +/- 68.4 ppb). Diurnal CH4 peaked at 10:00-11:00. Atmospheric CH4 there was mainly from local source emissions from Xi'an and short distance transport from the southern Qinling Mountains through the valleys. On the July sampling days, vertical CH4 concentrations increased in the morning (08:00) and at mid-night (23:30), while they decreased in the early afternoon (13:00) and late afternoon (18:00) from near the surface (20 m) to 200 m, increased at 200-500 m, and then decreased at 500-1000 m. During the heating period in November, vertical CH4 concentrations increased by 20.0-86.8 ppb at 20-200 m due to horizontal transport and poor atmospheric dispersion conditions, and then decreased up to 2000 m, with the fastest decrease rate (-44.4 +/- 51.4 similar to -17.6 +/- 19.3 ppb/100 m) at 500-1000 m. Vertical CH4 concentrations increased at all heights especially below 500 m in serve haze, mainly attributed to horizontal transport from the northwestern and southeastern polluted regions. Vertical observations further confirmed the important influence of transport on CH4 levels at this site.
WOS关键词GLOBAL METHANE SOURCES ; CO2 ; EMISSIONS ; WALIGUAN ; STATION ; GROWTH ; SITE ; DELTA-C-14 ; TRANSPORT ; REGION
资助项目National Natural Science Foundation of China[42173082] ; National Natural Science Foundation of China[42330114] ; Natural Science Basic Research Program of Shaanxi[2024JC-JCQN-34] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23010302]
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:001312565800001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; Natural Science Basic Research Program of Shaanxi ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.ieecas.cn/handle/361006/17787]  
专题地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
地球环境研究所_加速器质谱中心
通讯作者Niu, Zhenchuan
作者单位1.Nanjing Univ, Sch Atmospher Sci, Joint Int Res Lab Atmospher & Earth Syst Sci, Nanjing 210000, Peoples R China
2.IEECAS & Xian Jiaotong Univ, Joint Xian AMS Ctr, Shaanxi Prov Key Lab Accelerator Mass Spectrometry, Xian 710061, Peoples R China
3.IEECAS, Shaanxi Prov Key Lab Accelerator Mass Spectrometry, Joint Xian AMS Ctr, Xian 710061, Peoples R China
4.Natl Observat & Res Stn Reg Ecol Environm Change &, Guanzhong, Peoples R China
5.Xian Inst Innovat Earth Environm Res, Xian 710061, Peoples R China
6.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
7.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier, Beijing 100875, Peoples R China
8.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Wanyu,Feng, Xue,Niu, Zhenchuan,et al. Temporal characteristics and vertical profiles of atmospheric CH4 at the northern foot of the Qinling Mountains in China[J]. ATMOSPHERIC ENVIRONMENT,2024,337:12.
APA Liu, Wanyu.,Feng, Xue.,Niu, Zhenchuan.,Zhou, Weijian.,Chen, Huilin.,...&Liu, Lin.(2024).Temporal characteristics and vertical profiles of atmospheric CH4 at the northern foot of the Qinling Mountains in China.ATMOSPHERIC ENVIRONMENT,337,12.
MLA Liu, Wanyu,et al."Temporal characteristics and vertical profiles of atmospheric CH4 at the northern foot of the Qinling Mountains in China".ATMOSPHERIC ENVIRONMENT 337(2024):12.

入库方式： OAI收割

来源：地球环境研究所

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