DOI: 10.1016/j.atmosenv.2013.12.028
Scopus记录号: 2-s2.0-84892471135
论文题名: Low-molecular-weight organic acids in the Tibetan Plateau: Results from one-year of precipitation samples at the SET station
作者: Liu B ; , Kang S ; , Sun J ; , Wan X ; , Wang Y ; , Gao S ; , Cong Z
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 86 起始页码: 68
结束页码: 73
语种: 英语
英文关键词: Monsoon
; Organic acids
; Precipitation chemistry
; Tibetan Plateau
Scopus关键词: Anthropogenic disturbance
; Low-molecular-weight organic acids
; Monsoon
; Organic acid concentration
; Precipitation chemistry
; Precipitation measurement
; Tibetan Plateau
; Volume-weighted means
; Atmospheric thermodynamics
; Fluorine
; Oxalic acid
; Principal component analysis
; Organic acids
; acetic acid
; formic acid
; mesylic acid
; oxalic acid
; alpine environment
; atmospheric pollution
; measurement method
; moisture
; molecular analysis
; monsoon
; organic acid
; pollutant source
; precipitation (climatology)
; altitude
; article
; dilution
; glacier
; molecular weight
; photochemistry
; precipitation
; priority journal
; seasonal variation
; wet deposition
; China
; Qinghai-Xizang Plateau
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Background atmospheric organic acids: formic (F), acetic (A), oxalic (O), and methanesulfonic (MSA, abbreviated to M) acids in the southern Tibetan Plateau (TP), were determined in one-year of precipitation measurements at a remote alpine station. These organic acids were dominated by oxalic (volume-weighted mean of 0.51μmoll-1)/formic acid (0.38μmoll-1), followed by acetic acid (0.20μmoll-1) and MSA (0.10μmoll-1). Their levels were comparable with those from other remote sites, while they were lower than those found in populated areas. The South Asian monsoon is responsible for the seasonal variation of organic acid concentration: a relative abundance of MSA and lower concentrations of other organic acids (by the dilution effect) in the monsoon season, while opposite in the non-monsoon season. Diverse sources were identified by principal component analysis combined with the corresponding tracers. These were anthropogenic disturbances (which explain 41% of the variance), marine emission (24%), and biogenic emission (16%). Moreover, the variances of F/A, M/(F+A), and O/(F+A) in monsoonal versus non-monsoonal samples, were involved with the changes of sources. Furthermore, these chemical indexes suggest that active photochemistry over the TP was significant for the production of organic acids and consequently enhanced the ratios of M/(F+A) and O/(F+A) in monsoonal rainfalls. The elevated organic compounds within the ascending tropical moisture imply potential significances for the secondary formation of organic acids in the high-altitude and the changes of the Asian monsoon. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80710
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences (CAS), Beijing 100085, China; Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, CAS, P.O. Box 9825, Beijing 100029, China; State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China
Recommended Citation:
Liu B,, Kang S,, Sun J,et al. Low-molecular-weight organic acids in the Tibetan Plateau: Results from one-year of precipitation samples at the SET station[J]. Atmospheric Environment,2014-01-01,86