Chromophoric dissolved organic carbon cycle and its molecular compositions and optical properties in precipitation in the Guanzhong basin, China
Li, Xiaofei4,5,6,7; Yu, Feng7; Cao, Junji3,4,5,6; Fu, Pingqing2; Hua, Xiaoyu7; Chen, Qian7; Li, Jinwen7; Guan, Dongjie7; Tripathee, Lekhendra1; Chen, Qingcai7
刊名SCIENCE OF THE TOTAL ENVIRONMENT
2022-03-25
卷号814页码:12
关键词Water-soluble organic carbon Source apportionment Molecular compositions Optical properties Wet deposition
ISSN号0048-9697
DOI10.1016/j.scitotenv.2021.152775
通讯作者Li, Xiaofei(lixiaofei@ieecas.cn) ; Cao, Junji(jjcao@mail.iap.ac.cn)
英文摘要The investigation of water-soluble organic carbon (WSOC), which is important in the biogeochemical cycle of precipitation, can provide a comprehensive view of chromophores within the atmospheric boundary layer. In this work, the optical properties and molecular characteristics of WSOC in precipitation over the Guanzhong Basin (GB) of North China were investigated using ultraviolet-visible (UV-vis) absorption and excitation-emission matrix (EEM) fluorescence spectra, and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) coupled with electrospray ionization (ESI). Furthermore, sources and wet deposition of WSOC were estimated using in-situ measurements and modeling. The light-absorption by WSOC at 250-300 nm (UV region) and 400-550 nm (visible region) was 64.17% and 15.36% relative to the estimated total light-absorption, respectively. Parallel factor (PARAFAC) analysis revealed three types of fluorophores in WSOC at Xi'an (XN), including two humic-like substances (HULIS) and one protein-like substance (PRLIS), with HULIS accounting for 79% of total fluorescence intensity. FT-ICR MS analysis revealed that CHO and CHON were the most abundant components of WSOC at XN, each containing a variety of lignins, protein/amino sugars, and lipids. Moreover, the positive matrix factorization (PMF) model identified the contributions from three main sources (secondary precursors and aerosols, and coal combustion) of WSOC in precipitation at XN. The annual wet deposition flux of WSOC in precipitation at XN was estimated as about 0.63 g C m(-2) yr(-1), lower than that at other polluted cities. These findings add to our understanding of chromophoric dissolved organic carbon budgets, which is critical for accurately assessing the global carbon cycle.
资助项目National Natural Science Foundation of China[42177366] ; National Natural Science Foundation of China[41801048] ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS[SKLLQG2133]
WOS关键词LIGHT-ABSORPTION ; BROWN CARBON ; SOURCE APPORTIONMENT ; MATTER FLUORESCENCE ; MASS-SPECTROMETRY ; AQUATIC ENVIRONMENTS ; DEPOSITIONAL FLUX ; TIBETAN PLATEAU ; AEROSOLS ; RAINWATER
WOS研究方向Environmental Sciences & Ecology
语种英语
出版者ELSEVIER
WOS记录号WOS:000743247400002
资助机构National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS
内容类型期刊论文
源URL[http://ir.ieecas.cn/handle/361006/17460]  
专题地球环境研究所_粉尘与环境研究室
通讯作者Li, Xiaofei; Cao, Junji
作者单位1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China
2.Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
3.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China
4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
6.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Peoples R China
7.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China
推荐引用方式
GB/T 7714
Li, Xiaofei,Yu, Feng,Cao, Junji,et al. Chromophoric dissolved organic carbon cycle and its molecular compositions and optical properties in precipitation in the Guanzhong basin, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,814:12.
APA Li, Xiaofei.,Yu, Feng.,Cao, Junji.,Fu, Pingqing.,Hua, Xiaoyu.,...&Wang, Yuqin.(2022).Chromophoric dissolved organic carbon cycle and its molecular compositions and optical properties in precipitation in the Guanzhong basin, China.SCIENCE OF THE TOTAL ENVIRONMENT,814,12.
MLA Li, Xiaofei,et al."Chromophoric dissolved organic carbon cycle and its molecular compositions and optical properties in precipitation in the Guanzhong basin, China".SCIENCE OF THE TOTAL ENVIRONMENT 814(2022):12.
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