MERIS observations of phytoplankton blooms in a stratified eutrophic lake
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- 作者：Daniel Odermatt ; Francesco Pomati ; Jaime Pitarch ; Jeff Carpenter ; Marcin Kawka ; Michael Schaepman ; Alfred W¨¹est
- 关键词：Remote sensing ; Cyanobacteria ; Stratification ; Flow cytophotometry ; MERIS
- 刊名：Remote Sensing of Environment
- 出版年：2012
- 出版时间：November, 2012
- 年：2012
- 卷：126
- 期：Complete
- 页码：232-239
- 全文大小：1273 K
文摘
The use of spaceborne medium resolution imaging spectrometers with neural network algorithms has proven a large potential for application with optically complex inland waters. We make use of this approach to investigate the bio-physical dynamics in a eutrophic lake, applying three different neural networks to a dataset of 16 images acquired in June through August 2011. Concurrent in-situ data are measured by means of automatically deployed instruments from a moored platform, resolving the vertical distribution of various parameters at sub-daily temporal resolution. Phytoplankton blooms occur in different stratification layers, allowing the assessment of their influence on remote sensing estimates. A qualitative synopsis of the biophysical processes in the lake is given, but parameterization with in-situ attenuation profiles and accurate IOP estimates is needed to significantly enhance quantitative matchup comparisons. Recommendations on the combination of in-situ and satellite measurements are therefore given as an outlook.