Radiant heating rates and surface biology during the Arabian Sea Monsoon Experiment

Pradhan, Yaswant and Mohan, Mannil and Sengupta, Debasis and Nayak, Shailesh (2005) Radiant heating rates and surface biology during the Arabian Sea Monsoon Experiment. In: Journal of Geophysics and Engineering, 2 (1). pp. 16-22.

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Abstract

Radiometric observations are carried out to estimate the net shortwave solar radiation in the upper ocean during the Arabian Sea Monsoon Experiment Phase II (ARMEX-II). Radiant heating rates in the Arabian Sea Warm Pool (ASWP) region from in situ radiometric measurements are presented for the first time. The estimated shortwave fluxes (300-700nm) from the observed data are 101, 62, 40 and 29 W m(-2) at 10, 20, 30and 40 m depths respectively. About 5% of the surface light reaches below 50 m. Heating of the water column by penetrating solar radiationis substantial and estimated to be 0.18, 0.11, 0.08 and 0.07 degrees Cday(-1) in the upper 10, 20, 30 and 40 m respectively. Simultaneous observations from space-based sensors (SeaWiFS and IRS-P4 Ocean ColourMonitor) show an increase in solar absorption in regions with enhanced concentration of biologically active constituents.

Item Type:	Journal Article
Publication:	Journal of Geophysics and Engineering
Publisher:	IOP Publishing Ltd
Additional Information:	Copyright for this article belonsg to IOP Publishing Ltd.
Keywords:	ARMEX;Arabian Sea Warm Pool;radiant heating rate;chlorophyll
Department/Centre:	Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited:	02 Jun 2005
Last Modified:	19 Sep 2010 04:19
URI:	http://eprints.iisc.ac.in/id/eprint/3271

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