A numerical investigation of eddy-induced chlorophyll bloom in the southeastern tropical Indian Ocean during Indian Ocean Dipole—2006

Iskandar, Iskhaq and Sasaki, Hideharu and Sasai, Yoshikazu and Masumoto, Yukio and Mizuno, Keisuke (2010) A numerical investigation of eddy-induced chlorophyll bloom in the southeastern tropical Indian Ocean during Indian Ocean Dipole—2006. Ocean Dynamics, 60 (3). pp. 731-742. ISSN 731-742

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    Abstract

    An eddy-resolving coupled physical–biological model is used to study the effect of cyclonic eddy in enhancing offshore chlorophyll-a (Chl-a) bloom in the southeastern tropical Indian Ocean during boreal summer–fall 2006. The results demonstrate that the offshore Chl-a blooms are markedly coincident with the high eddy kinetic energy. Moreover, the vertical variations in Chl-a, nitrate, temperature, and mixed-layer depth (MLD) strongly imply that the cyclonic eddies induce surface Chl-a bloom through the injection of nutrient-rich water into the upper layer. Interestingly, we found that the surface bloom only occurs when the deep Chl-a maximum is located within the MLD. On the other hand, the response of subsurface Chl-a to the eddy pumping is remarkable, although it is hardly observable at the surface.

    Item Type: Article
    Additional Information: From the issue entitled "Special Issue Collection, OGCM for the Earth Simulator (OFES), The 1st international Conference, Yokohama, Japan, August 2008"
    Uncontrolled Keywords: Chlorophyll-a - Upwelling - Coupled physical–biological model - Indian Ocean Dipole - Southeastern tropical Indian Ocean
    Subjects: Q Science > Q Science (General)
    Q Science > QC Physics
    T Technology > TC Hydraulic engineering. Ocean engineering
    Divisions: Faculty of Mathematics and Natural Sciences > Department of Physics
    Depositing User: Dr. Iskhaq Iskandar
    Date Deposited: 02 Feb 2015 08:46
    Last Modified: 02 Feb 2015 08:46
    URI: http://eprints.unsri.ac.id/id/eprint/5124

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