| Autor: |
Shen, Fang, Zhou, Yun-Xuan, Li, Dao-Ji, Zhu, Wei-Jian, Suhyb Salama, Mhd |
| Předmět: |
|
| Zdroj: |
International Journal of Remote Sensing; 9/1/2010, Vol. 31 Issue 17/18, p4635-4650, 16p, 1 Color Photograph, 1 Diagram, 3 Charts, 4 Graphs, 1 Map |
| Abstrakt: |
Satellite estimation of chlorophyll-a (Chl-a) concentration in the Changjiang Estuary is challenging for ocean-colour retrieval algorithms. The Changjiang Estuary is characterized by suspended-sediment-dominated waters in the mouth and optically complex case 2 waters offshore of the mouth. Satellite ocean-colour products show that high-sediment loads of estuarine waters can cause overestimations or invalid flags of Chl-a concentration. A synthetic chlorophyll index (SCI) was designed for extracting chlorophyll information and for minimizing the influence of sediments on the remote-sensing reflectance spectrum. An SCI algorithm, a quadratic polynomial function of the SCI versus Chl-a concentration, was applied to the estimation of Chl-a concentration from Medium Resolution Imaging Spectrometer (MERIS) images. The overestimation of Chl-a concentration was corrected. The SCI algorithm has applications for MERIS estimation of Chl-a concentration in turbid waters with a moderate to high suspended-sediment concentration. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
