长江中下游大型湖泊水体固有光学特性:Ⅰ.吸收
Inherent optical properties of large lakes in the middle-lower reaches of the Yangtze River: Ⅰ. Absorption
查看参考文献34篇
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文摘
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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(201010、201108)、太湖(200810、201108)和巢湖(200910)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a_d(非色素颗粒物吸收)、a_(ph)(浮游植物色素吸收)、a_g(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a_(d-g)(主导类型a_d、a_g、a_d-a_g)合并类型)和a_(ph)-related(主导类型a_d-a_(ph)、a_d-a_(ph)-a_g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a_d、a_d-a_g、a_d-a_(ph)-a_g;夏季,鄱阳湖和太湖同为两种类型共同主导,分别为a_d、a_d-a_g,a_d-a_(ph)-a_g、a_d-a_(ph).总体来说,鄱阳湖夏、秋季和太湖秋季主导类型都属于a_(d-g)类型,而太湖夏季和巢湖秋季则属于a_(ph)-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. |
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其他语种文摘
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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 20082011 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), a_(ph) (phytoplankton pigment absorption), a_g (colored dissolved organic matter absorption) are greatly different, we consolidated the dominant types of IOCCG as type a_(d-g) and type aph-related. Results show that: 1) In autumn, the dominant type of Lake Poyang, Lake Taihu and Lake Chaohu is a_d, a_d-a_g, a_d-a_(ph)-a_g, respectively; In summer, Lake Poyang and Lake Taihu are co-leaded by two dominant types, they are a_d, a_d-a_g and a_d-a_(ph)-a_g, a_d-a_(ph). 2) Both dominant-type in summer, autumn of Lake Poyang and in autumn of Lake Taihu are a_(d-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. |
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来源
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湖泊科学
,2013,25(4):497-504 【核心库】
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DOI
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10.18307/2013.0406
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关键词
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水色遥感
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固有光学特性
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吸收系数
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主导类型
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地址
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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
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1003-5427 |
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学科
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自然地理学 |
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基金
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中国科学院知识创新工程重要方向项目
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国家自然科学基金项目
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中国科学院南京地理与湖泊研究所"一三五"项目
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文献收藏号
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CSCD:4877406
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