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Influence of Physical and Biological Processes on the Seasonal Cycle of Biogenic Flux in the Equatorial Indian Ocean : Volume 10, Issue 2 (18/02/2013)

By Vidya, P. J.

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Book Id: WPLBN0004004380
Format Type: PDF Article :
File Size: Pages 48
Reproduction Date: 2015

Title: Influence of Physical and Biological Processes on the Seasonal Cycle of Biogenic Flux in the Equatorial Indian Ocean : Volume 10, Issue 2 (18/02/2013)  
Author: Vidya, P. J.
Volume: Vol. 10, Issue 2
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Gauns, M., Verenkar, A., Ramaswamy, V., Kumar, S. P., Vidya, P. J., & Unger, D. (2013). Influence of Physical and Biological Processes on the Seasonal Cycle of Biogenic Flux in the Equatorial Indian Ocean : Volume 10, Issue 2 (18/02/2013). Retrieved from

Description: National Institute of Oceanography, Dona Paula, Goa-403 004, India. Seasonal cycle of biogenic fluxes obtained from sediment trap at two locations 5° 24′ N, 86° 46′ E (SBBT) and 3° 34′ N, 77° 46′ E (EIOT) within the equatorial Indian Ocean (EIO) were examined to understand the factors that control them. The sediment trap data at SBBT were collected for ten years from November 1987 while that at EIOT was for one year period from January 1996. The characteristic of biogenic flux at SBBT was the strong seasonality with peak flux in August, while lack of seasonality characterized the flux at EIOT. At the SBBT and EIOT, the higher chlorophyll biomass during summer monsoon was supported by wind-mixing, which supplied new nitrogen to the upper ocean. The stronger winds at SBBT compared to EIOT resulted in greater entrainment of nutrients to the euphotic zone, which supported higher chlorophyll biomass. High cell counts of phytoplankton (> 5 Μm) at SBBT dominated by diatoms suggest the operation of classical food web and high carbon export. On the contrary, one-and-half time higher magnitude of micro-zooplankton biomass dominated by picophytoplankton along with 2-fold lesser meso-zooplankton at EIOT indicated the importance of microbial loop. The substantial decrease in the carbon export at EIOT indicated faster remineralization of photosynthetically produced organic matter. We see a striking similarity between the biological process that operates in the SBBT with that of the equatorial Atlantic and EIOT with that of the equatorial Pacific, though the physical forcing in these three regions, namely EIO, the equatorial Atlantic and the equatorial Pacific, are very different.

Influence of physical and biological processes on the seasonal cycle of biogenic flux in the equatorial Indian Ocean

Banse, K.: Seasonality of phytoplankton chlorophyll in the central and northern Arabian Sea, Deep-Sea Res., 34 713–723, 1987.; Anderson, D. L. T. and Carrington, D. J.: Modeling interannual variability in the Indian Ocean using momentum fluxes from the operational weather analysis of the UK Meteorological Office and European Centre for Medium Range Weather Forecasts, J. Geophys. Res., 98, 12483–12499, 1993.; Balmaseda, M. A., Vidard, A., and Anderson, D. L. T.: The ECMWF Ocean Analysis System: ORA-S3, Mon. Weather Rev., 136, 3018–3034, 2008.; Asper, V. L., Deuser, W. G., Knauer, G. A., and Lohrenz, S. E.: Rapid coupling of sinking particle fluxes between surface and deep ocean waters, Nature, 357, 670–672, 1992.; Beatriz, M. B., Fasham, M. J. R., and Bowles, M. C.: Ocean Biogeochemistry and Global Change: JGOFS Research Highlights 1988–2000, IGBP Science Series 2, SCOR, IGBP, National Science Foundation, Research Council of Norway, University of Bergen, 36 pp., 2001.; Betzer, P. R., Showers, W. J., Laws, E. A., Winn, C. D., DiTullio, G. R., and Kroopnick, P. M.: Primary productivity and particle fluxes on a transect of the Equator at 153{\degree} W in the Pacific Ocean, Deep-Sea Res., 31, 1–11, 1984.; Bishop, J. K. B: Regional extremes in particulate matter composition and flux: effects on the chemistry of the ocean interior, in: Productivity of the Ocean: Present and Past, edited by: Berger, W. H., Smetacek, V. S. and Wefer, G., J. Wiley and Sons, Chichester, UK, 117–137, 1989.; Bonjean, F. and Lagerloef, G. S. E.: Diagnostic model and analysis of the surface currents in the tropical Pacific Ocean, J. Phys. Oceanogr., 32, 2938–2954, 2002.; Boyd, P. W. and Trull, T. W.: Understanding the export of biogenic particles in oceanic waters: is there consensus?, Prog. Oceanogr., 72, 276–312, doi:10.1016/j.pocean.2006.10.007, 2007.; Bradtmiller, L. I., Anderson, R. F., Fleisher, M. Q., and Burckle, L. H.: Opal burial in the equatorial Atlantic Ocean over the last 30 ka: implications for glacial–interglacial changes in the ocean silicon cycle, Paleoceanography, 22, PA4216, doi:10.1029/2007PA001443, 2007.; Bubnov, V. A.: Climatic zonal pressure gradient in the equatorial zone of the Indian Ocean, Oceanology, 33, 414–420, 1994.; Buesseler, K. O.: The decoupling of production and particulate export in the surface ocean, Global Biogeochem. Cy., 12 297–310, 1998.; Buesseler, K. O., Antia, A. N., Chen, M., Fowler, S. W., Gardner, W. D., Gustafsson, O., Harada, K., Michaels, A. F., Rutgers van der Loeff, M., Sarin, M., Steinberg, D. K., and Trull, T.: An assessment of the use of sediment traps for estimating upper ocean particle fluxes, J. Mar. Res., 65, 345–416, 2007.; Carr, M.-E., Friedrichs, M. A. M., Schmeltz, M., Aita, M. N., Antoine, D., Arrigo, K. R., Asanuma, I., Aumont, O., Barber, R., Behrenfeld, M., Bidigare, R., Buitenhuis, E.&am


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