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Nathan J. Downs, Peter W. Schouten and Alfio V. Parisi Seasonal Variations in the Subsurface Ultraviolet-B on an Inshore Pacific Coral Reef Ecosystem Photochemistry and Photobiology 89

Version of Record online: 16 JUL 2013 | DOI: 10.1111/php.12101

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Long term underwater UVB field exposures are presented for an inshore coral reef ecosystem, Hervey Bay, Australia (25oS, 153oE). Measurements were taken over a nine month period and include in-situ coral exposures during the significant La Niña event of late 2010 (SOI +27.1) which resulted in unprecedented high sea surface temperatures and severe flooding impacting upon the lagoon regions of the Great Barrier Reef and adjacent coastal estuaries. Exposures are presented with respect to modelled surface UVB, tidal depth variation and rainfall revealing some trends by level of significance in tide level, water turbidity and seasonal UV irradiance. Exposures for the reef ranged from between 30% to 1% relative to the study site surface UVB between clearer winter and turbid summer conditions respectively.

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