Comparison of Satellite Reflectance Algorithms for Estimating Phycocyanin Values and Cyanobacterial Total Biovolume in a Temperate Reservoir Using Coincident Hyperspectral Aircraft Imagery and Dense Coincident Surface Observations

We analyzed 27 established and new simple and therefore perhaps portable satellite phycocyanin pigment reflectance algorithms for estimating cyanobacterial values in a temperate 8.9 km2 reservoir in southwest Ohio using coincident hyperspectral aircraft imagery and dense coincident water surface obs...

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Published inRemote sensing (Basel, Switzerland) Vol. 9; no. 6; p. 538
Main Authors Beck, Richard, Xu, Min, Zhan, Shengan, Liu, Hongxing, Johansen, Richard, Tong, Susanna, Yang, Bo, Shu, Song, Wu, Qiusheng, Wang, Shujie, Berling, Kevin, Murray, Andrew, Emery, Erich, Reif, Molly, Harwood, Joseph, Young, Jade, Martin, Mark, Stillings, Garrett, Stumpf, Richard, Su, Haibin, Ye, Zhaoxia, Huang, Yan
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2017
Subjects
Aircraft
Algae
algal bloom
algorithm
Algorithms
BGA
blue-green algae
coincident surface observations
Compact airborne spectrographic imager
Correlation analysis
cyanobacteria
Estimation
harmful algal bloom
hyperspectral
Image acquisition
Landsat
Landsat satellites
MODIS
multispectral
Phycocyanin
Reflectance
Remote sensing
Reservoirs
satellite
Satellites
total biovolume
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Summary:We analyzed 27 established and new simple and therefore perhaps portable satellite phycocyanin pigment reflectance algorithms for estimating cyanobacterial values in a temperate 8.9 km2 reservoir in southwest Ohio using coincident hyperspectral aircraft imagery and dense coincident water surface observations collected from 44 sites within 1 h of image acquisition. The algorithms were adapted to real Compact Airborne Spectrographic Imager (CASI), synthetic WorldView-2, Sentinel-2, Landsat-8, MODIS and Sentinel-3/MERIS/OLCI imagery resulting in 184 variants and corresponding image products. Image products were compared to the cyanobacterial coincident surface observation measurements to identify groups of promising algorithms for operational algal bloom monitoring. Several of the algorithms were found useful for estimating phycocyanin values with each sensor type except MODIS in this small lake. In situ phycocyanin measurements correlated strongly (r2 = 0.757) with cyanobacterial sum of total biovolume (CSTB) allowing us to estimate both phycocyanin values and CSTB for all of the satellites considered except MODIS in this situation.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs9060538