Seasonal variation of chlorophyll and primary productivity in Central Arabian Sea: A macrocalibrated upper Ocean Ecosystem Model

Sharada, M. K. ; Yajnik, K. S. (1997) Seasonal variation of chlorophyll and primary productivity in Central Arabian Sea: A macrocalibrated upper Ocean Ecosystem Model Proceedings of the Indian Academy of Sciences - Earth and Planetary Sciences, 106 (1-2). pp. 33-42. ISSN 0253-4126

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Official URL: http://www.ias.ac.in/j_archive/epsci/106/1/33-42/v...

Related URL: http://dx.doi.org/10.1007/BF02841749

Abstract

Seasonal variation of chlorophyll has been of considerable interest on account of the effect of photosynthesis on ocean-atmosphere carbon exchange. It can be predicted by a dynamical system model of the marine ecosystem coupled with a physical oceanographic model. There is however a major difficulty in the calibration of contemporary ecosystem models on account of sparse data and a large number of model parameters. This paper reports a new approach of macrocalibration in which values of six parameters are determined by examining in detail the seasonal variation of chlorophyll and primary productivity keeping in view the observations of two Indian JGOFS cruises. Both switching and non-switching versions of grazing functions are used in a 7-component FDM model. Detailed simulations are reported for one station (16°N, 65°E). They show the effects of dependence of grazing preference on prey density on the behaviour of the ecosystem. The results of the simulation also provide a partial basis for developing correlations of primary production with chlorophyll and sediment flux.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Chlorophyll; Primary productivity; Ecosystem model; Arabian sea; Model calibration; Marine ecosystem
ID Code:60656
Deposited On:09 Sep 2011 09:44
Last Modified:18 May 2016 10:41

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