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Inherent optical properties of the Irish Sea and their effect on satellite primary production algorithms.

Tilstone, Gavin H, Smyth, Timothy J, Gowen, Richard J, Martinez-Vincente, Victor and Groom, Steve B (2005) Inherent optical properties of the Irish Sea and their effect on satellite primary production algorithms. Journal of Plankton Research, 27 (11). pp. 1127-1148. ISSN 1464 3774

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Abstract/Description

Three cruises were conducted in the Irish Sea during May, June and July 2001 to determine the variability in inherent optical properties (IOP), photo physiological parameters and primary production (PP) and to assess the effect of IOP on satellite PP algorithms. The absorption coefficients of phytoplankton (a<inf>ph</inf>), coloured dissolved organic material (a<inf>CDOM</inf>) and nonalgal particles (a<inf>NAP</inf>) were higher during May than June and July. A radiative transfer model was used to model the in-water light field based on a<inf>ph</inf> (case 1) and a<inf>ph</inf>, a<inf>CDOM</inf> and a<inf>NAP</inf> (case 2). When PP was compared using these light fields, there was a 46% difference in estimates. The case 2 in-water light field was coupled to a wavelength resolving satellite model of PP (PP<inf>case2</inf>) and had a low root mean square error (RMS) (0.27 log<inf>10</inf>PP) compared with in situ PP<inf>case2</inf>. IOP absorption, especially a<inf>CDOM</inf>, had a significant effect on the performance of this algorithm, but scattering of light by suspended particulate material had a small effect. A look-up table was generated from the in situ a<inf>ph</inf>, a<inf>CDOM</inf> and a<inf>NAP</inf> measurements, which can be used in conjunction with satellite products to produce satellite maps of PP. There was <25% difference between in situ PP<inf>case2</inf> and the satellite PP maps, which suggests that they could be produced routinely and accurately to monitor PP in the Irish Sea and other coastal and estuarine areas.

Item Type: Article
Print ISSN: 1464 3774
Uncontrolled Keywords: Marine biology; Irish Sea; Inherent optical properties; Photo-physiological aparmeters; Plankton production; Remote sensing; Algorithm; Empirical testing;
University Divisions/Research Centres: Faculty of Health, Life & Social Sciences > School of Life Sciences
Dewey Decimal Subjects: 600 Technology > 620 Engineering > 621 Electronic & mechanical engineering
500 Science > 550 Earth sciences & geology > 551 Geology, hydrology & meteorology > 551.4 Geomorphology & hydrology > 551.46 Oceanography
500 Science > 590 Animals (Zoology) > 593 Marine & seashore invertebrates
Library of Congress Subjects: Q Science > QL Zoology
Q Science > QC Physics
Item ID: 1700
Depositing User: RAE Import
Date Deposited: 11 Jul 2008 14:59
Last Modified: 03 Apr 2013 14:27
URI: http://researchrepository.napier.ac.uk/id/eprint/1700

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