气候变化领域集成服务门户(CCPortal): Chromophoric dissolved organic carbon cycle and its molecular compositions and optical properties in precipitation in the Guanzhong basin, China

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DOI	10.1016/j.scitotenv.2021.152775
	Chromophoric dissolved organic carbon cycle and its molecular compositions and optical properties in precipitation in the Guanzhong basin, China
	Li, Xiaofei; Yu, Feng; Cao, Junji; Fu, Pingqing; Hua, Xiaoyu; Chen, Qian; Li, Jinwen; Guan, Dongjie; Tripathee, Lekhendra; Chen, Qingcai; Wang, Yuqin
通讯作者	Li, XF (通讯作者)，Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China. ; Cao, JJ (通讯作者)，Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China.
发表日期	2022
ISSN	0048-9697
EISSN	1879-1026
卷号	814
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.
关键词	LIGHT-ABSORPTION BROWN CARBON SOURCE APPORTIONMENT MATTER FLUORESCENCE MASS-SPECTROMETRY AQUATIC ENVIRONMENTS DEPOSITIONAL FLUX TIBETAN PLATEAU AEROSOLS RAINWATER
英文关键词	Water-soluble organic carbon; Source apportionment; Molecular compositions; Optical properties; Wet deposition
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000743247400002
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
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/255058
作者单位	[Li, Xiaofei; Yu, Feng; Hua, Xiaoyu; Chen, Qian; Li, Jinwen; Guan, Dongjie; Chen, Qingcai; Wang, Yuqin] Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China; [Li, Xiaofei; Cao, Junji] Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Peoples R China; [Li, Xiaofei; Cao, Junji] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China; [Li, Xiaofei; Cao, Junji] CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China; [Cao, Junji] Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China; [Fu, Pingqing] Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China; [Tripathee, Lekhendra] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, 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]. 中国科学院西北生态环境资源研究院,2022,814.
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.
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).