Remote Sensing of Chlorophyll‐A in Case II Waters: A Novel Approach With Improved Accuracy Over Widely Implemented Turbid Water Indices

Journal of Geophysical Research: Oceans - Tập 123 Số 11 - Trang 8138-8158 - 2018
Harilal B. Menon1, Arjun Adhikari1
1Department of Marine Sciences Goa University Panaji Goa India

Tóm tắt

AbstractA new semianalytical algorithm was formulated to retrieve chlorophyll‐a (CHL) in optically complex waters using in situ data set of coastal waters of eastern Arabian Sea. The algorithm was derived using CHL index of the form, x = (Rrs(λ1)−1−Rrs(λ2)−1) × Rrs(λ3). The first wavelength (λ1) represents the secondary peak of CHL, while the second wavelength (λ2) and third wavelength (λ3) were delineated using a radiative transfer model and partial derivative analysis of hyperspectral remote sensing reflectance, respectively. Further iteration of three wavelengths between 600 and 700 nm resulted in a two‐wavelength index, x = (Rrs(λ1)−1−Rrs(λ2)−1) × Rrs(λ2). This was further regressed with CHL data initially used for three wavelength index. The final form of algorithm, Goa University Case II (GUC2), cMCHL=113.112x3−58.408x2+8.669x − 0.0384, was validated with in situ CHL ranging between 0.11 and 25.56 μg/L, resulted in a strong correlation r2 = 0.99, RMSE = 0.30, and bias = 0.03. A comparison with NIR‐Red two‐band, three‐band, four‐band, synthetic chlorophyll index, and normalized difference chlorophyll index pointed to the nonsuitability of turbid water indices in different water types of the study area. For the first time, a CHL algorithm has been tested successfully in water types outside the region of its formulation. A pixel‐to‐pixel validation of GUC2‐derived MERIS CHL with NASA bio‐Optical Marine Algorithm Dataset and Satellite Coastal and Oceanography Research data set resulted in correlation, bias, and RMSE of 0.90, −0.0013, and 1.2499, respectively. Furthermore, GUC2 was successfully tested in Chesapeake Bay for accurate retrieval of CHL from stations with varying turbidity levels.

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Tài liệu tham khảo

10.3390/rs9030301

Arnone R., 2016, Diurnal changes in ocean color in coastal waters, Proceedings of SPIE ‐ The International Society for Optical Engineering, 9827, 8

10.1016/j.rse.2006.01.015

10.1016/j.pocean.2013.12.008

Borstad G. A., 1982, The influence of the meandering guiana current on surface conditions near Barbados—Temporal variations of Trichodesmium (Cyanophyta) and other plankton, Journal of Marine Research, 40, 435

Boynton W. R., 2000, Estuarine Science: A Synthesis Approach to Research and Practice, 269

10.1016/j.rse.2013.04.018

10.1029/95JC00463

10.4319/lo.1983.28.5.0816

10.1007/s10661-012-2705-y

Chesapeake Bay Program(2012).Chesapeake bay program water quality database 1984‐present. Retrieved 2017‐09‐05http://www.chesapeakebay.net/data/downloads/cbp_water_quality_database_1984_present

10.1029/2011JC007219

10.1364/OE.21.027707

10.1364/AO.45.003577

10.1016/j.rse.2003.10.012

10.1016/j.rse.2007.06.015

Devassy V. P., 1987, A Special Collection of Papers to Felicitate dr. s. z. qasim on his Sixtieth Birthday, 61

Devassy V., 1978, Trichodesmium phenomenon, Indian Journal of Marine Sciences, 7, 168

Devassy V. P., 1979, Succession of organisms following Trichodesmium phenomenon, Indian Journal of Marine Science, 8, 89

10.1117/1.2839036

10.3354/meps082051

10.1016/j.rse.2017.03.040

10.1016/j.rse.2016.02.050

10.1364/OE.18.024109

10.1080/01431169208904125

10.1016/j.rse.2008.04.015

10.1080/01431169308953956

10.1016/j.rse.2007.01.016

10.1029/JD093iD09p10909

10.1364/AO.14.000417

10.1029/LN004

10.1080/014311699212470

10.4319/lo.1994.39.8.1903

10.3390/rs6010421

Hagy J. D., 2004, Hypoxia in Chesapeake Bay, 1950‐2001: Long‐term change in relation to nutrient loading and river flow, Estuaries, Estuarine Research Federation, Port Republic, MD, 27, 634

10.1016/j.ecss.2004.08.011

10.1080/01431161.2013.815820

10.1016/j.rse.2004.08.007

10.1029/2011JC007395

10.1029/2009JG001270

10.3354/meps075121

10.1007/BF02306834

Jyothibabu R., 2003, Intense blooms of Trichodesmium erythraeum (Cyanophyta) in the open waters along east coast of India, Indian Journal of Marine Sciences, 32, 165

10.3354/meps303001

10.5194/bg-6-2985-2009

Kowalczuk P., 1996, Analysis of temporal and spatial variability of ‘yellow substance’ absorption in the southern Baltic, Oceanologia, 38, 3

10.3390/rs8060497

10.1016/j.ecss.2012.09.017

10.1016/j.rse.2009.02.005

10.3390/s7123428

10.1364/AO.35.000453

10.1088/1748-9326/6/3/034037

10.1109/TGRS.2011.2163199

10.1016/j.oceano.2016.08.002

10.1093/plankt/fbi079

10.1080/01431161.2010.512947

10.1080/01431161.2016.1168949

10.1007/BF03030888

10.1029/2006GL026026

10.1016/j.ecss.2004.11.015

10.1016/j.rse.2011.10.016

Mobley C. D., 1994, Light and Water: Radiative Transfer in Natural Waters

10.4319/lo.1977.22.4.0709

10.1109/LGRS.2009.2026657

10.1016/B978-0-444-89990-3.50071-7

O'Reilly J. E., 2000, SeaWiFS Postlaunch Calibration and Validation Analyses, Part 3

Ocean Biology Processing Group, 2012, Medium Resolution Imaging Spectrometer (MERIS) Ocean Color Data

10.1016/j.rse.2011.11.013

Perumal P., 1999, Studies on the bloom‐forming species of phytoplankton in the Vellar Estuary, southeast coast of India, Indian Journal of Marine Sciences, 28, 400

10.1364/AO.36.008710

Preisendorfer R. W., 1976, Hydrological Optics (6 volumes)

10.1016/0011-7471(70)90077-X

10.1016/j.rse.2017.08.024

10.3389/fmars.2017.00133

10.1080/014311699212416

10.1080/2150704X.2016.1143985

10.1029/2002GL016185

10.1029/95JC00455

10.3390/rs9101022

10.1126/science.228.4695.70

10.5194/bg-11-269-2014

10.4319/lo.2013.58.6.2237

10.1080/01431161.2010.485216

10.1038/237105a0

Strickland J. D. H, 1970, A Practical Handbook of Seawater Analysis. Ottawa: Fisheries Research Board of Canada, Bulletin 167, 1968, 293

10.1016/0034-4257(88)90014-4

10.4319/lo.1999.44.3.0618

10.1016/j.csr.2013.06.003

10.1016/j.rse.2011.02.010

10.1016/j.rse.2005.07.001

10.1016/j.rse.2009.02.012

10.1029/2004JC002517

10.1109/JSTARS.2014.2333540

10.1088/1748-9326/6/2/024016

10.3390/rs6065090

10.4319/lo.2014.59.2.0373

10.5194/os-9-521-2013

10.5194/os-11-275-2015

10.1016/j.rse.2014.12.015

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Journal of Geophysical Research: Oceans

Tập 123 Số 11

8138-8158

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