摘要
基于在太湖、天目湖观测的水下光场资料,假定在水体中无内光源及无非弹性散射的情况下,通过水体中向上、向下的辐照度廓线分布,及由此确定的漫射反射率、漫射衰减系数,较为成功地反演了水体中介质的固有光学参数——吸收系数,且在较大程度上降低了由波浪及船舶阴影所带来的误差。同时将该反演结果与通过定量滤膜技术测定的结果进行了比较,二者吻合得较好。该方法有利于研究进入水体的太阳辐射能在各介质之间的分配及水生生态系统对水下光场的响应、大型浅水湖泊中蓝藻水华的暴发机理、提高二类水体水质定量遥感精度。
Based on the data of underwater light field measured in Taihu lake and Tianmuhu lake, on the supposition that there is source-free and no inelastic-scattering water, the inherent optical property （absorption coefficient） of medium in shallow lakes was successfully inversed by using the profile of upward and downward irradiance, diffuse reflectivity and diffuse decay coefficient. The error aroused from surface wave and ship shadow was reduced by the inversion method. The inversion results agree well with that by using the quantitative filter technique （QFT）. The method is helpful to research on photosynthesis available radiation distribution among different media and aquatic ecology responding to underwater light field, to mechanism of cyanobacteria bloom and to remote sensing precision for case 2 water improved.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2009年第7期1766-1771,共6页
Acta Optica Sinica
基金
国家自然科学基金(40701168)
国家863计划(2002AA601011)资助项目
关键词
辐照度
水光学
反演
吸收系数
irradiance
hydro-optics
inversion
absorption
