Suspended particulate matter in Lake Erie derived from MODIS aquatic colour imagery
Suspended particulate matter in Lake Erie derived from MODIS aquatic colour imagery
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DOI：
10.1080/01431160903302973
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发表时间：
2010-01-01
影响因子：
3.4
通讯作者：
Booty, W. G.
中科院分区：
文献类型：
--
作者：
Binding, C. E.;Jerome, J. H.;Booty, W. G.
本文探讨了使用中分辨率成像光谱仪（MODIS）波段的红/近红外线悬浮颗粒物（SPM）的浓度估计在中度浑浊，光学复杂的伊利湖沃茨。观测结果表明，在波长短于550纳米，超过50%的吸收信号是由溶解的有机物和浮游植物占，确认算法纳入这些波长可能不适合这些沃茨。单波段和波段比大于667 nm的波长进行了测试，其适用于监测SPM浓度在这些沃茨。利用一个简化的区域半分析模型，这是独立的溶解有机物和叶绿素吸收的变化，使SPM浓度的估计从MODIS离开水的辐射在748 nm的平均均方根（RMS）误差为40%。颗粒的垂直分布的知识，使总水柱悬浮负荷，然后与风再悬浮事件的估计。该方法适用于在748 nm的MODIS离水辐射产生的时间序列的表面和总水柱悬浮负荷在伊利湖期间2003-2007年。
This paper explores the use of Moderate Resolution Imaging Spectroradiometer (MODIS) wavebands in the red/near-infra-red for estimating concentrations of suspended particulate matter (SPM) in the moderately turbid, optically complex waters of Lake Erie. Observations show that at wavelengths shorter than 550 nm, more than 50% of the absorption signal is accounted for by dissolved organic matter and phytoplankton, confirming that algorithms incorporating these wavelengths may not be appropriate for these waters. Single band and band ratios at wavelengths greater than 667 nm are tested for their suitability for monitoring SPM concentrations in these waters. A simplified regional semi-analytical model is utilized which is independent of variations in dissolved organic matter and chlorophyll absorption, enabling estimates of SPM concentrations from MODIS water-leaving radiance at 748 nm with an average root mean square (RMS) error of 40%. Knowledge of the vertical distribution of particles enables estimates of total water column suspended loads which are then related to wind re-suspension events. The method is applied to MODIS water-leaving radiance at 748 nm to produce a time series of surface and total water column suspended loads in Lake Erie for the period 2003-2007.