Variability of satellite-derived sea surface height anomaly, and its relationship with Bigeye tuna (Thunnus obesus) catch in the Eastern Indian Ocean
| Autor: | Marisa Mei-Ling, Khairul Amri, Stefano Vignudelli, Robert R. Leben, Muhammad Syahdan, Jonson Lumban-Gaol, Risti Endriani Arhatin, Yoshihiro Okada, Bisman Nababan, Kedarnath Mahapatra |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Atmospheric Science
Sea surface high anomaly biology Applied Mathematics Anomaly (natural sciences) Java island Bigeye tuna 04 agricultural and veterinary sciences Sea-surface height biology.organism_classification Eddy Satellite radar altimetry Indian ocean Oceanography 040102 fisheries 0401 agriculture forestry and fisheries Satellite El Niño Computers in Earth Sciences Geology Thunnus General Environmental Science |
| Zdroj: | European Journal of Remote Sensing 48 (2015): 465–477. doi:10.5721/EuJRS20154826 info:cnr-pdr/source/autori:Lumban-Gaol J.; Leben R.R.; Vignudelli S.; Mahapatra K.; Okada Y.; Nababan B.; Mei-Ling M.; Amri K.; Arhatin R.E.; Syahdan M./titolo:Variability of satellite-derived sea surface height anomaly, and its relationship with Bigeye tuna (Thunnus obesus) catch in the Eastern Indian Ocean/doi:10.5721%2FEuJRS20154826/rivista:European Journal of Remote Sensing/anno:2015/pagina_da:465/pagina_a:477/intervallo_pagine:465–477/volume:48 |
| ISSN: | 2279-7254 |
| Popis: | We analyzed the variability of sea surface height anomaly (SSHA), and its relationship with Bigeye tuna catch in the eastern Indian Ocean (EIO) off of Java Island (Indonesia). Both time series of SSHA and Bigeye tuna HR show dominant signals corresponding to the annual and inter-annual variability. During the southeast monsoon the wind blows along southern coast of Java and produces coastal upwelling. This causes sea level to drop due to an offshore Ekman transport, and thermocline becomes shallower. During El Niño and Indian Ocean Dipole (IOD) positive phase, upwelling is more intense and a large cold eddy forms in the EIO off Java. Generally, Bigeye tuna HR tends to increase during upwelling seasons and becomes even higher during El Niño and the positive phase of the IOD. The increased Bigeye tuna HR during the southeast monsoon, El Niño and the IOD positive phase can be attributed to the shallower thermocline depth and the enhancement of biological productivity due to development of eddies and strong upwelling in the EIO. The spatial distribution of SSHA indicates that Bigeye tuna catches are abundant in the frontal regions between cold and warm eddies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|