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Abstract
Sixty‐seven samplings were collected, almost covering all over the Taihu Lake, in one campaign in October 2004. At each station, the backscattering coefficients and the field spectra were measured in situ, respectively, with a HS‐6 and a FieldSpec 931 spectroradiometer (ASD Inc.). Almost concurrently, water samples were fetched with Niskin water‐fetching equipment and then returned to the laboratory for concentration and absorption measurement. The whole lake was divided into different areas according to some indexes. Three models were used to calculate remote sensing reflectance R rsc for the waters where the in situ remote sensing reflectance R rsm was beyond the bottom effect, which was considered as optically deep waters. By comparison of R rsc and R rsm, the best model suitable for optically deep waters in Taihu Lake, together with its optimal experiential parameter, were selected and developed, which was very important and helpful to develop a universal model to estimate accurately remote sensing reflectance for the whole lake in the next step.
Acknowledgements
This research was jointly funded by the Innovation Talent Project of Nature Science Foundation of Jiangsu province,China (BK2004422), open fund of Laboratory for Remote Sensing Science, Institute of Remote Sensing Applications of Chinese Academy of Sciences, and Beijing Normal University (SK050011) and grants from Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences (CXNIGLAS‐A02‐014). Qingjun Song, Yunlin Zhang, Gang Li, Fei Gao, Anan Yang, Jianjun Zhu, Xiaoyong Wang are acknowledged for their participation in the field campaigns and experiment analysis. And we also thank the two anonymous referees for their comments and suggestions to clarify a few points in this manuscript.