Environmental conditions and bio-optical signature of a coccolithophorid bloom in the Patagonian shelf

In January 2008, a patch of high reflectance detected by ocean color satellite images was sampled during a cruise over the southern Argentinean continental shelf. High calcite concentrations (particulate inorganic carbon (PIC)) found at the patch were associated with dominance of the coccolithophori...

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Autores principales:	Garcia, C.A.E., Garcia, V.M.T., Dogliotti, A.I., Ferreira, A., Romero, S.I., Mannino, A., Souza, M.S., Mata, M.M.
Formato:	JOUR
Materias:	Blooms (metal) Carbonate minerals Chlorophyll NASA Organic carbon Reflection Remote sensing Backscattering coefficients Backscattering ratio Beam attenuation coefficient Bio-optical Chlorophyll concentration Continental shelves Emiliania huxleyi Environmental conditions Inorganic carbon Ocean-color satellites Operational algorithms Remote-sensing reflectance Root-mean-square errors Spectral dependency Strong correlation Time-evolution analysis Water-leaving radiances Backscattering algal bloom backscatter calcite chlorophyll coccolith concentration (composition) continental shelf data set environmental conditions error analysis ocean color reflectance remote sensing satellite imagery temporal evolution Atlantic Ocean Patagonian Shelf Haptophyceae
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_21699291_v116_n3_p_Garcia
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_21699291_v116_n3_p_Garcia
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spelling	todo:paper_21699291_v116_n3_p_Garcia2023-10-03T16:39:53Z Environmental conditions and bio-optical signature of a coccolithophorid bloom in the Patagonian shelf Garcia, C.A.E. Garcia, V.M.T. Dogliotti, A.I. Ferreira, A. Romero, S.I. Mannino, A. Souza, M.S. Mata, M.M. Blooms (metal) Carbonate minerals Chlorophyll NASA Organic carbon Reflection Remote sensing Backscattering coefficients Backscattering ratio Beam attenuation coefficient Bio-optical Chlorophyll concentration Continental shelves Emiliania huxleyi Environmental conditions Inorganic carbon Ocean-color satellites Operational algorithms Remote-sensing reflectance Root-mean-square errors Spectral dependency Strong correlation Time-evolution analysis Water-leaving radiances Backscattering algal bloom backscatter calcite chlorophyll coccolith concentration (composition) continental shelf data set environmental conditions error analysis ocean color reflectance remote sensing satellite imagery temporal evolution Atlantic Ocean Patagonian Shelf Emiliania huxleyi Haptophyceae In January 2008, a patch of high reflectance detected by ocean color satellite images was sampled during a cruise over the southern Argentinean continental shelf. High calcite concentrations (particulate inorganic carbon (PIC)) found at the patch were associated with dominance of the coccolithophorid Emiliania huxleyi. Relatively low chlorophyll concentrations (0.29 to 1.48 mg m -3 ) were found, but both particulate attenuation (0.27 to 1.15 m -1 ) and backscattering coefficients at 660 nm (0.003 to 0.042 m -1 ) were noticeably high. Particulate inorganic to organic carbon (POC) ratio (PIC:POC) was highly variable (0.02 to 1.1), but mostly high, showing a significant correlation with particulate backscattering coefficient at 660 nm (r = 0.83, p < 0.005). The spectral dependency of the backscattering coefficient followed Gordon et al. (2009). Both the time evolution analyses of normalized water leaving radiance at 551 nm (nLw551) and the high PIC:POC ratios suggested an advanced stage of the coccolithophorid bloom, therefore with high detached coccoliths:cell ratios. Moreover, this was supported by a strong correlation between PIC and both particulate backscattering (r = 0.81, p < 0.005) and particulate beam attenuation coefficient (r = 0.7, p < 0.05). Remote sensing reflectance data were strongly related to particle backscattering and backscattering ratio, but not to absorption. NASA operational algorithms overestimated chlorophyll by a factor of ∼2 and estimated PIC with a relatively high root-mean-square (RMS) error (RMS = 97.9 μg PIC L -1 ). Better estimates of PIC values (RMS = 81.5 μg PIC L -1 ) were achieved when we used the original PIC-specific backscattering coefficient (Balch et al., 2005). Copyright 2011 by the American Geophysical Union. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_21699291_v116_n3_p_Garcia
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Blooms (metal) Carbonate minerals Chlorophyll NASA Organic carbon Reflection Remote sensing Backscattering coefficients Backscattering ratio Beam attenuation coefficient Bio-optical Chlorophyll concentration Continental shelves Emiliania huxleyi Environmental conditions Inorganic carbon Ocean-color satellites Operational algorithms Remote-sensing reflectance Root-mean-square errors Spectral dependency Strong correlation Time-evolution analysis Water-leaving radiances Backscattering algal bloom backscatter calcite chlorophyll coccolith concentration (composition) continental shelf data set environmental conditions error analysis ocean color reflectance remote sensing satellite imagery temporal evolution Atlantic Ocean Patagonian Shelf Emiliania huxleyi Haptophyceae
spellingShingle	Blooms (metal) Carbonate minerals Chlorophyll NASA Organic carbon Reflection Remote sensing Backscattering coefficients Backscattering ratio Beam attenuation coefficient Bio-optical Chlorophyll concentration Continental shelves Emiliania huxleyi Environmental conditions Inorganic carbon Ocean-color satellites Operational algorithms Remote-sensing reflectance Root-mean-square errors Spectral dependency Strong correlation Time-evolution analysis Water-leaving radiances Backscattering algal bloom backscatter calcite chlorophyll coccolith concentration (composition) continental shelf data set environmental conditions error analysis ocean color reflectance remote sensing satellite imagery temporal evolution Atlantic Ocean Patagonian Shelf Emiliania huxleyi Haptophyceae Garcia, C.A.E. Garcia, V.M.T. Dogliotti, A.I. Ferreira, A. Romero, S.I. Mannino, A. Souza, M.S. Mata, M.M. Environmental conditions and bio-optical signature of a coccolithophorid bloom in the Patagonian shelf
topic_facet	Blooms (metal) Carbonate minerals Chlorophyll NASA Organic carbon Reflection Remote sensing Backscattering coefficients Backscattering ratio Beam attenuation coefficient Bio-optical Chlorophyll concentration Continental shelves Emiliania huxleyi Environmental conditions Inorganic carbon Ocean-color satellites Operational algorithms Remote-sensing reflectance Root-mean-square errors Spectral dependency Strong correlation Time-evolution analysis Water-leaving radiances Backscattering algal bloom backscatter calcite chlorophyll coccolith concentration (composition) continental shelf data set environmental conditions error analysis ocean color reflectance remote sensing satellite imagery temporal evolution Atlantic Ocean Patagonian Shelf Emiliania huxleyi Haptophyceae
description	In January 2008, a patch of high reflectance detected by ocean color satellite images was sampled during a cruise over the southern Argentinean continental shelf. High calcite concentrations (particulate inorganic carbon (PIC)) found at the patch were associated with dominance of the coccolithophorid Emiliania huxleyi. Relatively low chlorophyll concentrations (0.29 to 1.48 mg m -3 ) were found, but both particulate attenuation (0.27 to 1.15 m -1 ) and backscattering coefficients at 660 nm (0.003 to 0.042 m -1 ) were noticeably high. Particulate inorganic to organic carbon (POC) ratio (PIC:POC) was highly variable (0.02 to 1.1), but mostly high, showing a significant correlation with particulate backscattering coefficient at 660 nm (r = 0.83, p < 0.005). The spectral dependency of the backscattering coefficient followed Gordon et al. (2009). Both the time evolution analyses of normalized water leaving radiance at 551 nm (nLw551) and the high PIC:POC ratios suggested an advanced stage of the coccolithophorid bloom, therefore with high detached coccoliths:cell ratios. Moreover, this was supported by a strong correlation between PIC and both particulate backscattering (r = 0.81, p < 0.005) and particulate beam attenuation coefficient (r = 0.7, p < 0.05). Remote sensing reflectance data were strongly related to particle backscattering and backscattering ratio, but not to absorption. NASA operational algorithms overestimated chlorophyll by a factor of ∼2 and estimated PIC with a relatively high root-mean-square (RMS) error (RMS = 97.9 μg PIC L -1 ). Better estimates of PIC values (RMS = 81.5 μg PIC L -1 ) were achieved when we used the original PIC-specific backscattering coefficient (Balch et al., 2005). Copyright 2011 by the American Geophysical Union.
format	JOUR
author	Garcia, C.A.E. Garcia, V.M.T. Dogliotti, A.I. Ferreira, A. Romero, S.I. Mannino, A. Souza, M.S. Mata, M.M.
author_facet	Garcia, C.A.E. Garcia, V.M.T. Dogliotti, A.I. Ferreira, A. Romero, S.I. Mannino, A. Souza, M.S. Mata, M.M.
author_sort	Garcia, C.A.E.
title	Environmental conditions and bio-optical signature of a coccolithophorid bloom in the Patagonian shelf
title_short	Environmental conditions and bio-optical signature of a coccolithophorid bloom in the Patagonian shelf
title_full	Environmental conditions and bio-optical signature of a coccolithophorid bloom in the Patagonian shelf
title_fullStr	Environmental conditions and bio-optical signature of a coccolithophorid bloom in the Patagonian shelf
title_full_unstemmed	Environmental conditions and bio-optical signature of a coccolithophorid bloom in the Patagonian shelf
title_sort	environmental conditions and bio-optical signature of a coccolithophorid bloom in the patagonian shelf
url	http://hdl.handle.net/20.500.12110/paper_21699291_v116_n3_p_Garcia
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Environmental conditions and bio-optical signature of a coccolithophorid bloom in the Patagonian shelf

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