DOI: 10.1016/j.atmosenv.2014.09.038
Scopus记录号: 2-s2.0-84907174095
论文题名: Absorption and fluorescence characteristics of rainwater CDOM and contribution to Lake Taihu, China
作者: Zhang Y ; , Gao G ; , Shi K ; , Niu C ; , Zhou Y ; , Qin B ; , Liu X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 98 起始页码: 483
结束页码: 491
语种: 英语
英文关键词: Chromophoric dissolved organic matter
; Fluorescence spectroscopy
; Nutrients
; Rainwater
; UV-visible spectroscopy
Scopus关键词: Nutrients
; Chromophoric dissolved organic matter
; Fluorescence characteristics
; Lake taihu
; Rainwater
; UV visible spectroscopy
; Fluorescence spectroscopy
; ammonia
; dissolved organic matter
; fulvic acid
; humic acid
; lake water
; nitrate
; nitrogen
; phosphate
; phosphorus
; protein
; rain
; absorption coefficient
; biogenic material
; chemical composition
; dissolved organic matter
; fluorescence
; fluorescence spectroscopy
; humification
; nutrient
; rainwater
; seasonal variation
; wet deposition
; absorption
; air pollution
; Article
; atmosphere
; chemical analysis
; chemical composition
; China
; chromatophore
; factorial analysis
; fluorescence
; fluorescence spectroscopy
; humification
; lake
; light absorption
; nutrient
; nutritional parameters
; river
; seasonal variation
; storage
; ultraviolet radiation
; water sampling
; wet deposition
; China
; Taihu Lake
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: We characterized the composition and sources of chromophoric dissolved organic matter (CDOM) in rainwater, and assessed the relative contribution of rainwater CDOM to lake water in Lake Taihu based on rainwater collected during 35 rainfall events in 2012. Chemical analysis, ultraviolet-visible absorbance, and three-dimensional fluorescence spectroscopy were used to characterize CDOM. The CDOM absorption coefficient at 254 nm (a254) had a significant seasonal variation, with a mean of 3.67 ± 1.69 m-1 in the wet season (from April to early August), which was significantly lower than the means in the two dry seasons (8.26 ± 2.94 m-1 from January to March, and 7.60 ± 3.80 m-1 from late August to December). The mean humification index and the mean index of recent autochthonous contribution were 0.74 ± 0.48 and 1.31 ± 0.35, respectively, indicating that rainwater CDOM was dominated by an atmospheric microbial origin component. We identified four fluorescence components using parallel factor analysis modeling in the rainwater CDOM, i.e., two protein-like components (C1 and C2) and two fulvic-like components (C3 and C4), which had characteristics similar to those of protein and humic-like substances, respectively. The a254 was significantly and positively (p < 0.001) correlated with each of the five nutrient parameters: total dissolved nitrogen (r2 = 0.76), ammonium (r2 = 0.65), nitrate (r2 = 0.36), total dissolved phosphorus (r2 = 0.55), and phosphate (r2 = 0.50) showing the tightly coupling between CDOM and nutrients. Based on the deposition of the rainwater CDOM and the storage of the CDOM in Lake Taihu, the annual relative contribution of rainwater CDOM to the lake water was 11.7% in 2012. The results showed the important effect of wet deposition on CDOM sources in Lake Taihu, which is located in a region with severe air pollution in the Yangtze River Delta. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80492
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Taihu Lake Laboratory Ecosystem Research Station, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Zhang Y,, Gao G,, Shi K,et al. Absorption and fluorescence characteristics of rainwater CDOM and contribution to Lake Taihu, China[J]. Atmospheric Environment,2014-01-01,98