文献类型：期刊文献

英文题名：Absorption and backscattering coefficients and their relations to water constituents of Poyang Lake, China

作者：Wu, Guofeng[1,2] Cui, Lijuan[3] Duan, Hongtao[4] Fei, Teng[1,2] Liu, Yaolin[1,2]

第一作者：Wu, Guofeng

通信作者：Wu, GF[1]

机构：[1]Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China;[2]Wuhan Univ, Key Lab Geog Informat Syst, Minist Educ, Wuhan 430079, Peoples R China;[3]Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China;[4]Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China

年份：2011

卷号：50

期号：34

起止页码：6358-6368

外文期刊名：APPLIED OPTICS

收录：;EI(收录号：20115014600268);Scopus(收录号：2-s2.0-83155182730);WOS:【SCI-EXPANDED(收录号:WOS:000298347200046)】；

基金：This study was supported by the National Natural Science Foundation of China (NSFC, Grant No. 40971191), the Scientific Research Starting Foundation of the Ministry of Education of China for Returned Overseas Chinese Scholars, the Special Foundation of Ministry of Finance of China for Nonprofit Research of Forestry Industry (Grant No. 200904001) and the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KZCX2-YW-QN311).

语种：英文

外文关键词：Backscattering - Biogeochemistry - Lakes - Optical properties - Organic carbon - Particles (particulate matter) - Phytoplankton - Remote sensing - Water quality

摘要：The measurement and analysis of inherent optical properties (IOPs) of the main water constituents are necessary for remote-sensing-based water quality estimation and other ecological studies of lakes. This study aimed to measure and analyze the absorption and backscattering coefficients of the main water constituents and, further, to analyze their relations to the water constituent concentrations in Poyang Lake, China. The concentrations and the absorption and backscattering coefficients of the main water constituents at 47 sampling sites were measured and analyzed as follows. (1) The concentrations of chlorophyll a (C-CHL), dissolved organic carbon (C-DOC), suspended particulate matter (C-SPM), including suspended particulate inorganic matter (C-SPIM) and suspended particulate organic matter (C-SPOM), and the absorption coefficients of total particulate (a(p)), phytoplankton (a(ph)), nonpigment particulate (a(d)), and colored/chromophoric dissolved organic matter (a(g)) were measured in the laboratory. (2) The total backscattering coefficients, including the contribution of pure water at six wavelengths of 420, 442, 470, 510, 590, and 700 nm, were measured in the field with a HydroScat-6 backscattering sensor. (3) The backscattering coefficients without the contribution of pure water (b(b)) were then derived by subtracting the backscattering coefficients of pure water from the total backscattering coefficients. (4) The C-CHL, C-SPM, C-SPIM, C-SPOM, and C-DOC of the 41 remaining water samples were statistically described and their correlations were analyzed. (5) The a(ph), a(d), a(p), a(g), and b(b) were visualized and analyzed, and their relations to C-CHL, C-SPM, C-SPIM, C-SPOM, or C-DOC were studied. Results showed the following. (1) Poyang Lake was a suspended particulate inorganic matter dominant lake with low phytoplankton concentration. (2) One salient aph absorption peak was found at 678 nm, and it explained 72% of the variation of C-CHL. (3) The a(d) and a(p) exponentially decreased with increasing wavelength, and they explained 74% of the variation of C-SPIM and 71% variation of C-SPM, respectively, at a wavelength of 440nm. (4) The ag also exponentially decreased with increasing wavelength, and it had no significant correlation to C-DOC at a significance level of 0.05. (5) The bb decreased with increasing wavelength, and it had strong and positive correlations to C-SPM, C-SPIM and C-SPOM, a strong and negative correlation to C-CHL, and no correlation to C-DOC at a significance level of 0.05. Such results will be helpful for the understanding of the IOPs of Poyang Lake. They, however, only represented the IOPs during the sampling time period, and more measurements and analyses in different seasons need to be carried out in the future to ensure a comprehensive understanding of the IOPs of Poyang Lake. (C) 2011 Optical Society of America