巢湖水体的表观光学特性测量与分析
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摘要
实地测量了巢湖水体的表观光学特性和固有光学特性,利用可测量的4个水面以上表观光学特性计算水面以下辐照度比R(0-)值.根据巢湖水体的固有光学特性分析R(0-)的光谱特征,发现波长624nm附近藻胆素及706nm附近叶绿素a的吸收峰在R(0-)光谱上特征明显.利用生物光学模型拟合了R(0-)与水体的吸收散射系数之间的关系.结果表明,系数f随不同光学类型水体和光照条件的变化而变化.
The apparent optical properties(AOPs) and the inherent optical properties in Chaohu Lake were measured,and the irradiance reflectance just under the water surface R(0-) was calculated using the four measured AOPs above the water surface.Adsorption peak of phycobilin at 624nm and chlorophyll-a at 706nm were identified in the spectra of R(0-).The bio-optical model was used to describe the relationship between R(0-) and the inherent optical properties of water in Chaohu Lake.The coefficient f changed with the variation of water body optical types and lights.
The apparent optical properties(AOPs) and the inherent optical properties in Chaohu Lake were measured,and the irradiance reflectance just under the water surface R(0-) was calculated using the four measured AOPs above the water surface.Adsorption peak of phycobilin at 624nm and chlorophyll-a at 706nm were identified in the spectra of R(0-).The bio-optical model was used to describe the relationship between R(0-) and the inherent optical properties of water in Chaohu Lake.The coefficient f changed with the variation of water body optical types and lights.
引文
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[2]Kirk J T O.Light and photosynthesis in aquatic ecosystems[M].2nd.Cambridge,Britain:Cambridge University Press,1994.
[3]唐军武.海洋光学特性模拟与遥感模型[D].北京:中国科学院遥感应用研究所,1999.
[4]潘德炉,李淑菁,毛天明.卫星海洋水色遥感的辐射模式研究[J].海洋与湖沼,1997,28(6):752-658.
[5]陈楚群.应用水色卫星遥感技术估算珠江口海域溶解有机碳浓度[J].环境科学学报,2001,21(6):715-719.
[6]李云梅,黄家柱,韦玉春,等.用分析模型方法反演水体叶绿素的浓度[J].遥感学报,2006,10(2):169-175.
[7]张之源,王培华,张崇岱.巢湖营养化状况评价及水质恢复探讨[J].环境科学研究,1999,12(5):45-48.
[8]王永华,钱少猛,徐南妮,等.巢湖东区底泥污染物分布特征及评价[J].环境科学研究,2004,17(6):22-26.
[9]Fargion G S,Mueller J L.Ocean optics protocols for satellite ocean color sensor validation,revision 2[M].Greenbelt:NASA,2000.
[10]李素菊.利用分析方法建立湖泊光学水质参数反演算法研究——以安徽巢湖为例[D].北京:北京大学环境学院,2003.
[11]Gons H J.Optical teledetection of chlorophyll a in turbid inland waters[J].Environmental Science and Technology,1999,33(7):1127-1132.
[12]Hakvoorta H,Haan J F de,Jordans R.Towards airborne remote sensing of water quality in The Netherlands–validation and error analysis[J].ISPRS.Journal of Photogrammetry and Remote Sensing,2002,57:171-183.
[13]Buiteveld H,Hakvoort J H M,Donze M.Optical properties of pure water[J].Ocean Optics XII,SPIE,1994,2258:174-183.
[14]Petzold T J.Volume scattering functions for selected ocean waters[M].San Diego:Scripps Institution of Oceano-graphy Ref.,1972:72-78.
[15]Mankovsky V I,Haltrin V I.Phase functions of light scattering measured in waters of world ocean and Lake Baykal[C].Toronto,Canada:Geoscience and Remote Sensing Symposium,2002 IEEE International,2002:3570-3572.
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