descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 02 Feb 2021 English Publisher:MDPI AGJournal:Climate, volume 9, page 29 (eissn: 2225-1154,

Authors: Jonson Lumban-Gaol; Eko Siswanto; Kedarnath Mahapatra; Nyoman Metta Nyanakumara Natih; I Wayan Nurjaya; Mochamad Tri Hartanto; Erwin Maulana; +5 Authors

doi: 10.3390/cli9020029

Impact of the Strong Downwelling (Upwelling) on Small Pelagic Fish Production during the 2016 (2019) Negative (Positive) Indian Ocean Dipole Events in the Eastern Indian Ocean off Java

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Abstract

Although researchers have investigated the impact of Indian Ocean Dipole (IOD) phases on human lives, only a few have examined such impacts on fisheries. In this study, we analyzed the influence of negative (positive) IOD phases on chlorophyll a (Chl-a) concentrations as an indicator of phytoplankton biomass and small pelagic fish production in the eastern Indian Ocean (EIO) off Java. We also conducted field surveys in the EIO off Palabuhanratu Bay at the peak (October) and the end (December) of the 2019 positive IOD phase. Our findings show that the Chl-a concentration had a strong and robust association with the 2016 (2019) negative (positive) IOD phases. The negative (positive) anomalous Chl-a concentration in the EIO off Java associated with the negative (positive) IOD phase induced strong downwelling (upwelling), leading to the preponderant decrease (increase) in small pelagic fish production in the EIO off Java.

Related Organizations

Udayana University
Indonesia
Bogor Agricultural University
Indonesia
Japan Agency for Marine-Earth Science and Technology
Japan
Tokai University
Japan

Keywords

IOD, pelagic fishery, climate change, sea surface temperature, chlorophyll-a, Palabuhanratu Bay

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