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• W37720913 abstract "There are a number of studies that have examined solar irradiance in theenvironment above and below the ocean surface. Unlike other previous studies, thisthesis maps both surface and underwater irradiances using a combination ofgeostationary and Sea WiFS satellite data and surface measurements. Detailed estimatesof broadband, PAR and UVB solar radiation, both above and below water, is obtainedfor the Great Barrier Reef region in northeast Australia. The study area covers the CoralSea including the Great Barrier Reef (GBR), northeast of Queensland (1 0 o S - 26° S,142 E - 155° E). Geostationary meteorological satellite (GMS) data collected forperiods between 1995 and 2005 are combined with the models to obtain broadbandsolar radiation at the surface. PAR and UVB underwater irradiance are estimated fromthe attenuation coefficients Kd derived from the Sea WiFS instrument for the period of1998-2005.In developing algorithms, a look-up table (LUT), which contains senes ofbroadband surface solar radiation and the Earth-atmosphere reflectivity, is created fromthe Streamer radiative transfer model. The broadband Earth-atmosphere reflectivity a llAderived from the GMS data is used to estimate the surface solar radiation from the LUTalgorithms. The attenuation coefficients Kd for PAR, UVB and Sea WiFS wavebands areobtained from Monte Carlo models, and relationships between these Kd values arederived as a result. Using Sea WiFS-derived Kd data, PAR and UVB underwaterirradiance are estimated across the regions from the Kd relationships.Comparisons between the satellite-derived surface solar radiation and themeasurements at Rockhampton and Cairns give good agreement with root-mean-square difference (RMSD) of 2.26 MJ-m-2-day1 and 2.85 MJ-m-2-day 1, respectively. TheSea WiFS-derived Kd at six different wavebands obtained from Monte Carlo models arecompared to the measurements at Heron Island, with a smallest RMSD value of 0.075-I m.Maps of solar radiation both above and below the water surface are provided forthe study area. On average, strong solar radiation is exhibited in summer and autumnperiods at latitude bands between 18 ° S and 26° S. The temporal information suggeststhere is a small increase in solar radiation of about 1 percent per decade. The underwaterPAR and UVB irradiances along the GBR coastline at 2.5 m depth were in magnitudeof ~300 W-m-2 and ~120 mW-m-2, respectively. Monthly distribution at 2.5 m depthunderwater for PAR shows an outstanding feature throughout between September andFebruary. There are patterns of high PAR irradiance throughout the summer months of2001/2002 and 2002/2003. Results of the satellite-derived solar radiation are used toexamine the 2002 coral bleaching events. A correlation between maximum solarradiation and the bleaching data are seen in summer months of 2001/2002." @default.
• W37720913 created "2016-06-24" @default.
• W37720913 creator A5018801588 @default.
• W37720913 date "2008-12-01" @default.
• W37720913 modified "2023-09-24" @default.
• W37720913 title "Estimating the radiation environmentin the Great Barrier Reef" @default.
• W37720913 hasPublicationYear "2008" @default.
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