Estimation of phytoplankton primary production based on in situ hyperspectral and simulated MERIS data in Taihu Lake, China
首发时间:2012-11-22
Abstract:This study attempts to demonstrate the possibility of hyperspectra reflectance and MERIS data in estimating primary production. Reflectance spectra of waters in shallow Taihu Lake of East China were measured at 50 monitoring stations with an ASD FieldSpec spectroradiometer during 8-22 November of 2007. Primary production at the 50 stations was calculated from the vertically generalized production model. The relationship between primary production and reflectance was established via regression analysis. It was found that strong correlation exists between primary production and reflectance at 443nm and 679nm. The reflectance at these two wavelengths Rrs(443) and Rrs(679) can explain 70% and 65% variance in primary production, respectively. The ratio of two bands is more accurately than a single band in estimating primary production, but the accuracy depends considerably on the range of primary production. Primary production was also estimated from MERIS channels in the vicinity of 443nm (band 2), 555nm (band 5) and 679nm (band 8). These simulated channels can be used to estimate primary production satisfactorily. However, individual bands can achieve more accurate estimates than the ratio of multiple bands.
keywords: Taihu Lake MERIS primary production phytoplankton
点击查看论文中文信息
基于实测高光谱和模拟MERIS数据的中国太湖浮游植物初级生产力估算
摘要:本研究分析了实测高光谱遥感反射率和MERIS数据在估算太湖初级生产力方面的可行性。于2007年11月8日至22日进行了太湖野外实验,利用深度垂向归纳模型计算太湖初级生产力。通过回归分析建立初级生产力和遥感反射率之间的关系。研究发现,在波长为443nm和679nm处的遥感反射率和初级生产力之间存在很强的相关性。在这两个波长处的反射率Rrs(443)和Rrs(679)分别解释了初级生产力70%和65%的差异。两波段比值比单波段能更准确地估算太湖浮游植物的初级生产力,但其估算精度在很大程度上取决于初级生产力的范围。MERIS的第二波段443nm,第五波段555nm,和第八波段679nm的遥感反射率也可以用来估算太湖浮游植物的初级生产力。单波段法比多波段比值法在估算初级生产力方面具有更高的估算精度。
基金:
论文图表:
引用
No.****
同行评议
共计0人参与
勘误表
基于实测高光谱和模拟MERIS数据的中国太湖浮游植物初级生产力估算
评论
全部评论0/1000