Analysis on the feasibility of multi-source remote sensing observations for chl-a monitoring in Finnish lakes

The Science of the Total Environment
S KoponenT Hannonen

Abstract

Chlorophyll-a (chl-a) concentration of lake water can be measured with airborne (or spaceborne) optical remote sensing instruments. The rmse obtained here with empirical algorithms and 122 measurement points was 8.9 microg/l (all points used for training and testing). Airborne Imaging Spectrometer for Applications (AISA) was used in four lake water quality measurement campaigns (8 measurement days) in southern Finland during 1996-1998 with other airborne instruments and extensive in situ data collection. As empirical algorithms are employed for chl-a retrieval from remote sensing data, temporally varying factors such as surface reflection and atmospheric effects degrade the estimation accuracy. This paper analyzes the quantitative accuracy of empirical chl-a retrieval algorithms available as methods to correct temporal disturbances are either included or excluded. The aim is to evaluate the usability of empirical chl-a retrieval algorithms in cases when no concurrent reference in situ data are available. Four methods to reduce the effects of temporal variations are investigated. The methods are: (1) atmospheric correction; (2) synchronous radiometer data; (3) wind speed data; and (4) bidirectional scattering model based on wind...Continue Reading

References

Apr 24, 2001·The Science of the Total Environment·P HärmäS Koponen
Apr 24, 2001·The Science of the Total Environment·K KallioT Pyhälahti
Apr 24, 2001·The Science of the Total Environment·J PulliainenM Hallikainen

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Citations

Oct 24, 2006·Environmental Monitoring and Assessment·Hongtao DuanZongming Wang
Sep 25, 2007·Environmental Monitoring and Assessment·Saku AnttilaPetri Pellikka
Dec 19, 2008·Environmental Monitoring and Assessment·Wang Zhengjun, Gong Huili
Nov 13, 2009·Environmental Monitoring and Assessment·Hongtao DuanBai Zhang
Apr 24, 2001·The Science of the Total Environment·K KallioT Pyhälahti
Apr 24, 2001·The Science of the Total Environment·J PulliainenM Hallikainen
Apr 24, 2001·The Science of the Total Environment·P HärmäS Koponen
Jul 23, 2003·The Science of the Total Environment·R J VosB W Ibelings
May 30, 2017·Nihon eiseigaku zasshi. Japanese journal of hygiene·Naoko Nihei
Nov 2, 2019·The Analyst·Hongwei ChenQiaoling Du

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