dc.contributor.author | PrasannaKumar, S. | |
dc.contributor.author | David, T.D. | |
dc.contributor.author | Byju, P. | |
dc.contributor.author | Narvekar, J. | |
dc.contributor.author | Yoneyama, K. | |
dc.contributor.author | Nakatani, N. | |
dc.contributor.author | Ishida, A. | |
dc.contributor.author | Horii, T. | |
dc.contributor.author | Masumoto, Y. | |
dc.contributor.author | Mizuno, K. | |
dc.date.accessioned | 2012-09-03T09:05:57Z | |
dc.date.available | 2012-09-03T09:05:57Z | |
dc.date.issued | 2012 | |
dc.identifier.citation | Geophysical Research Letters, vol.39; 2012; 6pp. L14601 | |
dc.identifier.other | no | |
dc.identifier.uri | http://drs.nio.org/drs/handle/2264/4144 | |
dc.description.abstract | The high-frequency times-series data collected during 28th October to 21st November 2006 onboard R/V Mirai provided the first evidence of short-term bio-physical coupling in the central equatorial Indian Ocean (EIO). The predominant feature of the thermal structure was the down-sloping of 28 degrees C-isotherm and up-sloping of 14 degrees C-isotherm indicating deepening of surface-layer and shoaling of lower-thermocline respectively. Concomitant with the deepening of surface-layer, nitracline and subsurface chlorophyll maximum (SCM) also deepened. From the prominent bi-weekly periodicity in the 14 degrees C-isotherm and the upward phase propagation in the meridional current velocity, we infer that shoaling was the response of mixed Rossby-Gravity (MRG) waves. Based on temperature and currents we propose that deepening of surface-layer was caused by the eastward advection of warmer waters associated with the weakening of Indian Ocean Dipole (IOD). This made the upper ocean more nutrient-depleted and biologically less-productive, an indication that the central EIO is returning to its pre-IOD condition. | |
dc.language.iso | en | |
dc.publisher | American Geophysical Union | |
dc.relation.requires | Geophys_Res_Lett_39_L14601.jpg | |
dc.rights | An edited version of this paper was published by AGU. Copyright [2012] AGU. To view the published open abstract, go to http://dx.doi.org/10.1029/2012GL052609 | |
dc.subject | thermal structure | |
dc.subject | surface layers | |
dc.subject | chlorophyll | |
dc.subject | advection | |
dc.title | Bio-physical coupling and ocean dynamics in the central equatorial Indian Ocean during 2006 Indian Ocean Dipole | |
dc.type | Journal Article | |