Staff View: Seasonal variability of sea surface chlorophyll-a at west Borneo island

Seasonal variability of sea surface chlorophyll-a at west Borneo island

The optimization of marine fisheries activities can be achieved through an understanding of the timing of fishing, access to good information, and knowledge of oceanographic conditions. These conditions often lead to significant nutrient enrichment in the surface layer of the ocean, which in turn in...

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Main Authors:	Ivonne Milichristi Radjawane, Ejria Saleh, Gandhi Napitupulu, Muhammad Rais Abdillah, Mohd Azamuddin Mohd Hassan
Format:	Article
Language:	English English
Published:	Faculty of Geography UGM and Indonesian Geographers Association 2024
Subjects:	GC1-1581 Oceanography QK710-899 Plant physiology
Online Access:	https://eprints.ums.edu.my/id/eprint/41410/1/ABSTRACT.pdf https://eprints.ums.edu.my/id/eprint/41410/2/FULL%20TEXT.pdf https://eprints.ums.edu.my/id/eprint/41410/ http://dx.doi.org/10.22146/ijg.87713
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spelling	my.ums.eprints.414102024-10-16T05:58:31Z https://eprints.ums.edu.my/id/eprint/41410/ Seasonal variability of sea surface chlorophyll-a at west Borneo island Ivonne Milichristi Radjawane Ejria Saleh Gandhi Napitupulu Muhammad Rais Abdillah Mohd Azamuddin Mohd Hassan GC1-1581 Oceanography QK710-899 Plant physiology The optimization of marine fisheries activities can be achieved through an understanding of the timing of fishing, access to good information, and knowledge of oceanographic conditions. These conditions often lead to significant nutrient enrichment in the surface layer of the ocean, which in turn increases the sea surface chlorophyll-a (SSC). In the context of the west Borneo Island region, seasonal variability in SSC plays a crucial role in determining potential fishing grounds. The objectives of this study are examining the seasonal variability of SSC, identifying upwelling and downwelling processes through analysis of sea surface wind (SSW), and determining the climatological distribution of Sea Surface Temperature (SST) and sea surface height (SSH) within the water off Labuan Island, Malaysian Borneo, and the Karimata Strait, West Kalimantan, Indonesia. Remote sensing data spanning from 2007 to 2021 were analyzed, encompassing SSC, SST, SSH anomalies, SSW, wind stress curl, and Ekman pumping. Additionally, rainfall and river discharge were examined as supplementary indicators of these oceanographic processes. The findings indicate that SSW plays a pivotal role in driving upwelling and downwelling processes, which in turn influence SSC variability. In Labuan waters, upwelling occurs primarily from November to February, while downwelling predominates from June to September. In contrast, in the Karimata Strait, upwelling is identified from July to September, with downwelling prevalent between March and May. Upwelling events in both regions are characterized by increasing SSC, accompanied by decreasing SST and SSH, while the opposite trends are observed during downwelling events. The peak of rainfall and river discharge in December is noted to potentially enhance SSC variability in the Karimata Strait compared to Labuan Island waters Faculty of Geography UGM and Indonesian Geographers Association 2024 Article NonPeerReviewed text en https://eprints.ums.edu.my/id/eprint/41410/1/ABSTRACT.pdf text en https://eprints.ums.edu.my/id/eprint/41410/2/FULL%20TEXT.pdf Ivonne Milichristi Radjawane and Ejria Saleh and Gandhi Napitupulu and Muhammad Rais Abdillah and Mohd Azamuddin Mohd Hassan (2024) Seasonal variability of sea surface chlorophyll-a at west Borneo island. Indonesian Journal of Geography, 56 (1). pp. 1-13. ISSN 0024-9521 http://dx.doi.org/10.22146/ijg.87713
institution	Universiti Malaysia Sabah
building	UMS Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaysia Sabah
content_source	UMS Institutional Repository
url_provider	http://eprints.ums.edu.my/
language	English English
topic	GC1-1581 Oceanography QK710-899 Plant physiology
spellingShingle	GC1-1581 Oceanography QK710-899 Plant physiology Ivonne Milichristi Radjawane Ejria Saleh Gandhi Napitupulu Muhammad Rais Abdillah Mohd Azamuddin Mohd Hassan Seasonal variability of sea surface chlorophyll-a at west Borneo island
description	The optimization of marine fisheries activities can be achieved through an understanding of the timing of fishing, access to good information, and knowledge of oceanographic conditions. These conditions often lead to significant nutrient enrichment in the surface layer of the ocean, which in turn increases the sea surface chlorophyll-a (SSC). In the context of the west Borneo Island region, seasonal variability in SSC plays a crucial role in determining potential fishing grounds. The objectives of this study are examining the seasonal variability of SSC, identifying upwelling and downwelling processes through analysis of sea surface wind (SSW), and determining the climatological distribution of Sea Surface Temperature (SST) and sea surface height (SSH) within the water off Labuan Island, Malaysian Borneo, and the Karimata Strait, West Kalimantan, Indonesia. Remote sensing data spanning from 2007 to 2021 were analyzed, encompassing SSC, SST, SSH anomalies, SSW, wind stress curl, and Ekman pumping. Additionally, rainfall and river discharge were examined as supplementary indicators of these oceanographic processes. The findings indicate that SSW plays a pivotal role in driving upwelling and downwelling processes, which in turn influence SSC variability. In Labuan waters, upwelling occurs primarily from November to February, while downwelling predominates from June to September. In contrast, in the Karimata Strait, upwelling is identified from July to September, with downwelling prevalent between March and May. Upwelling events in both regions are characterized by increasing SSC, accompanied by decreasing SST and SSH, while the opposite trends are observed during downwelling events. The peak of rainfall and river discharge in December is noted to potentially enhance SSC variability in the Karimata Strait compared to Labuan Island waters
format	Article
author	Ivonne Milichristi Radjawane Ejria Saleh Gandhi Napitupulu Muhammad Rais Abdillah Mohd Azamuddin Mohd Hassan
author_facet	Ivonne Milichristi Radjawane Ejria Saleh Gandhi Napitupulu Muhammad Rais Abdillah Mohd Azamuddin Mohd Hassan
author_sort	Ivonne Milichristi Radjawane
title	Seasonal variability of sea surface chlorophyll-a at west Borneo island
title_short	Seasonal variability of sea surface chlorophyll-a at west Borneo island
title_full	Seasonal variability of sea surface chlorophyll-a at west Borneo island
title_fullStr	Seasonal variability of sea surface chlorophyll-a at west Borneo island
title_full_unstemmed	Seasonal variability of sea surface chlorophyll-a at west Borneo island
title_sort	seasonal variability of sea surface chlorophyll-a at west borneo island
publisher	Faculty of Geography UGM and Indonesian Geographers Association
publishDate	2024
url	https://eprints.ums.edu.my/id/eprint/41410/1/ABSTRACT.pdf https://eprints.ums.edu.my/id/eprint/41410/2/FULL%20TEXT.pdf https://eprints.ums.edu.my/id/eprint/41410/ http://dx.doi.org/10.22146/ijg.87713
_version_	1814049458091982848
score	13.211869

Seasonal variability of sea surface chlorophyll-a at west Borneo island

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