Satellite-based observation of particulate organic carbon in the northern Bay of Bengal

Particulate organic carbon (POC) plays a vital role in the ocean carbon cycle and is related to many important ocean biogeochemical processes. This study investigates the annual and seasonal variability of POC and its relationship with sea surface temperature (SST), chlorophyll-a (Chl-a), and wind v...

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Autores principales:	Muhammad Abdur Rouf, Md Rony Golder, Zareen Afroje Sumana
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Particulate organic carbon Chlorophyll-a SST Wind vector Northern Bay of Bengal Bangladesh Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/53336d2d17ae4f5c82f701c093b17f5e
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spelling	oai:doaj.org-article:53336d2d17ae4f5c82f701c093b17f5e2021-12-02T05:04:13ZSatellite-based observation of particulate organic carbon in the northern Bay of Bengal2666-765710.1016/j.envadv.2021.100124https://doaj.org/article/53336d2d17ae4f5c82f701c093b17f5e2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666765721000958https://doaj.org/toc/2666-7657Particulate organic carbon (POC) plays a vital role in the ocean carbon cycle and is related to many important ocean biogeochemical processes. This study investigates the annual and seasonal variability of POC and its relationship with sea surface temperature (SST), chlorophyll-a (Chl-a), and wind vector in the northern Bay of Bengal (BoB) of Bangladesh and validates satellite data with in situ measurement data. Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua satellite level-3 data of POC, Chl-a, and SST were used in this study. Wind vector data were obtained from WindSat Polarimetric Radiometer satellite. Annual average of 18-year (2002–2019) surface POC concentration in the northern BoB ranged from 126.83 mg m−3 to 180.58 mg m−3 (average of 153.84±11.17 mg m−3) with a declining rate of -1.12 mg m−3 year−1. The POC was highest (181.80±22.34 mg m−³) during the northeast-monsoon (December–February) and lowest (136.56±36.24 mg m−³) in the pre-monsoon (March-May). Statistically significant (F3,202 =18.09; p<0.05) difference of POC was found amongst the seasons. A very weak inverse relationship was observed between the SST and POC seasonally and annually, whereas POC and Chl-a showed a strong positive relation in the northern BoB. POC was observed to be very prominent with northeasterly wind in northeast and post-monsoon and low with southwesterly wind in southwest and pre-monsoon. POC variability was influenced mainly by Chl-a, followed by SST and wind speed for BoB. The POC:Chl-a ratio in the northern BoB were ranged from 240.91 to 294.68, which shows a strong influence of biological processes on POC composition. Additional mechanisms responsible for the seasonal POC variability are also addressed in this study. A significantly (p<0.001) moderate correlation (r=0.75) was found between the MODIS Aqua satellite data and in situ observation. Further detailed investigation is needed to observe the role of POC variability in biogeochemical processes of the northern BoB.Muhammad Abdur RoufMd Rony GolderZareen Afroje SumanaElsevierarticleParticulate organic carbonChlorophyll-aSSTWind vectorNorthern Bay of BengalBangladeshEnvironmental sciencesGE1-350ENEnvironmental Advances, Vol 6, Iss , Pp 100124- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Particulate organic carbon Chlorophyll-a SST Wind vector Northern Bay of Bengal Bangladesh Environmental sciences GE1-350
spellingShingle	Particulate organic carbon Chlorophyll-a SST Wind vector Northern Bay of Bengal Bangladesh Environmental sciences GE1-350 Muhammad Abdur Rouf Md Rony Golder Zareen Afroje Sumana Satellite-based observation of particulate organic carbon in the northern Bay of Bengal
description	Particulate organic carbon (POC) plays a vital role in the ocean carbon cycle and is related to many important ocean biogeochemical processes. This study investigates the annual and seasonal variability of POC and its relationship with sea surface temperature (SST), chlorophyll-a (Chl-a), and wind vector in the northern Bay of Bengal (BoB) of Bangladesh and validates satellite data with in situ measurement data. Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua satellite level-3 data of POC, Chl-a, and SST were used in this study. Wind vector data were obtained from WindSat Polarimetric Radiometer satellite. Annual average of 18-year (2002–2019) surface POC concentration in the northern BoB ranged from 126.83 mg m−3 to 180.58 mg m−3 (average of 153.84±11.17 mg m−3) with a declining rate of -1.12 mg m−3 year−1. The POC was highest (181.80±22.34 mg m−³) during the northeast-monsoon (December–February) and lowest (136.56±36.24 mg m−³) in the pre-monsoon (March-May). Statistically significant (F3,202 =18.09; p<0.05) difference of POC was found amongst the seasons. A very weak inverse relationship was observed between the SST and POC seasonally and annually, whereas POC and Chl-a showed a strong positive relation in the northern BoB. POC was observed to be very prominent with northeasterly wind in northeast and post-monsoon and low with southwesterly wind in southwest and pre-monsoon. POC variability was influenced mainly by Chl-a, followed by SST and wind speed for BoB. The POC:Chl-a ratio in the northern BoB were ranged from 240.91 to 294.68, which shows a strong influence of biological processes on POC composition. Additional mechanisms responsible for the seasonal POC variability are also addressed in this study. A significantly (p<0.001) moderate correlation (r=0.75) was found between the MODIS Aqua satellite data and in situ observation. Further detailed investigation is needed to observe the role of POC variability in biogeochemical processes of the northern BoB.
format	article
author	Muhammad Abdur Rouf Md Rony Golder Zareen Afroje Sumana
author_facet	Muhammad Abdur Rouf Md Rony Golder Zareen Afroje Sumana
author_sort	Muhammad Abdur Rouf
title	Satellite-based observation of particulate organic carbon in the northern Bay of Bengal
title_short	Satellite-based observation of particulate organic carbon in the northern Bay of Bengal
title_full	Satellite-based observation of particulate organic carbon in the northern Bay of Bengal
title_fullStr	Satellite-based observation of particulate organic carbon in the northern Bay of Bengal
title_full_unstemmed	Satellite-based observation of particulate organic carbon in the northern Bay of Bengal
title_sort	satellite-based observation of particulate organic carbon in the northern bay of bengal
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/53336d2d17ae4f5c82f701c093b17f5e
work_keys_str_mv	AT muhammadabdurrouf satellitebasedobservationofparticulateorganiccarboninthenorthernbayofbengal AT mdronygolder satellitebasedobservationofparticulateorganiccarboninthenorthernbayofbengal AT zareenafrojesumana satellitebasedobservationofparticulateorganiccarboninthenorthernbayofbengal
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Satellite-based observation of particulate organic carbon in the northern Bay of Bengal

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