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引用本文:王长凤,段洪涛,马荣华,张玉超.长江中下游大型湖泊水体固有光学特性:Ⅰ.吸收.湖泊科学,2013,25(4):497-504. DOI:10.18307/2013.0406
WANG Changfeng,DUAN Hongtao,MA Ronghua,ZHANG Yuchao.Inherent optical properties of large lakes in the middle-lower reaches of the Yangtze River: Ⅰ. Absorption. J. Lake Sci.2013,25(4):497-504. DOI:10.18307/2013.0406
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长江中下游大型湖泊水体固有光学特性:Ⅰ.吸收
王长凤1,2, 段洪涛1, 马荣华1, 张玉超1
1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;2.中国科学院大学, 北京 100049
摘要:
吸收系数是水体固有光学特性的重要组成部分,也是构建水色参数高精度遥感模型的基础,具有重要的研究意义.本文针对长江中下游三大淡水湖——鄱阳湖(2010 10、2011 08)、太湖(2008 10、2011 08)和巢湖(2009 10)进行5次野外实验,以International Ocean Colour Coordinating Group(IOCCG)2000年报告"Remote Sensing of Ocean Colour in Coastal,and Other Optically-Complex,Waters"为基础,对水体不同光学主导类型进行分类;并根据ad(非色素颗粒物吸收)、aph(浮游植物色素吸收)、ag(有色可溶性有机物吸收)等不同主导类型光谱曲线特征差异,引入ad-g(主导类型adagad-ag的合并类型)和aph-related(主导类型ad-aphad-aph-ag的合并类型)类型,对主导类型进行归纳合并.结果显示:秋季,鄱阳湖、太湖、巢湖的主导类型较为单一,分别为adad-agad-aph-ag;夏季,鄱阳湖和太湖同为两种类型共同主导,分别为adad-ag,ad-aph-agad-aph.总体来说,鄱阳湖夏、秋季和太湖秋季主导类型都属于ad-g类型,而太湖夏季和巢湖秋季则属于aph-related类型.另外,分别针对Gons和Gitelson叶绿素a模型假设条件进行验证,发现不同湖泊水体及不同主导类型下其适用性程度不一致.
关键词:  水色遥感  固有光学特性  吸收系数  主导类型
DOI:10.18307/2013.0406
分类号:
基金项目:中国科学院知识创新工程重要方向性项目(KZCX2-EW-QN308);国家自然科学基金项目(40801137,40871168);中国科学院南京地理与湖泊研究所"一三五"项目(NIGLAS2012135014,NIGLAS2012135010)联合资助
Inherent optical properties of large lakes in the middle-lower reaches of the Yangtze River: Ⅰ. Absorption
WANG Changfeng1,2, DUAN Hongtao1, MA Ronghua1, ZHANG Yuchao1
1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;2.University of Chinese Academy of Sciences, Beijing 100049, P.R.China
Abstract:
Absorption coefficient has important scientific significance,acting as not only an important part of the inherent optical properties of waters,but also as the physical basis to build a bio-optical model.In this paper,dominant types of waters' absorption coefficient were classified and analyzed with the method of "Remote Sensing of Ocean Colour in Coastal,and Other Optically-Complex, Waters (IOCCG) "based on the in situ measurements during the period of 2008 2011 of three freshwater lakes (Lake Poyang, Lake Taihu and Lake Chaohu) in the middle-lower reaches of the Yangtze River.Because of the spectrals of ad (non-pigment particles absorption),aph (phytoplankton pigment absorption),ag (colored dissolved organic matter absorption) are greatly different, we consolidated the dominant types of IOCCG as type ad-g and type aph-related.Results show that: 1) In autumn,the dominant type of Lake Poyang,Lake Taihu and Lake Chaohu is ad,ad-ag,ad-aph-ag,respectively;In summer,Lake Poyang and Lake Taihu are co-leaded by two dominant types,they are ad,ad-ag and ad-aph-ag,ad-aph.2) Both dominant-type in summer, autumn of Lake Poyang and in autumn of Lake Taihu are ad-g;however,Lake Taihu in summer and Lake Chaohu in autumn have the aph-related dominant-type.3) For the Gons and Gitelson algorithms and their assumptions,the applicability conditions are found inconsistency in different lake water and different dominant types.
Key words:  Water color remote sensing  IOPs  absorption coefficient  dominant-type
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