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Diffuse attenuation coefficients for East Antarctic pack ice and snow at ultraviolet and visible wavelengths

Citation

Michael, KJ and Higgins, J, Diffuse attenuation coefficients for East Antarctic pack ice and snow at ultraviolet and visible wavelengths, IEEE Transactions on Geoscience and Remote Sensing, 52, (7) pp. 4455-4461. ISSN 0196-2892 (2014) [Refereed Article]

Copyright Statement

copyright 2013 IEEE

DOI: doi:10.1109/TGRS.2013.2282158

Abstract

Declining stratospheric ozone concentrations have led to higher levels of ultraviolet (UV) B (UVB) radiation at the Earth’s surface, particularly in Antarctic spring time. Increased exposure to UVB radiation can decrease the productivity of sea-ice algae, as well as cause damage to organisms living in the clear water beneath the Antarctic pack ice. Conversely, sea-ice algae and other photosynthetic organisms rely on photosynthetically active radiation (PAR) to drive and sustain growth. Field work performed during the 2007 Australian Antarctic Program Sea Ice Physics and Ecosystem eXperiment voyage to the East Antarctic sea-ice zone allowed the estimation of diffuse attenuation coefficients for pack ice and the overlying snow at UV wavelengths (305, 313, 320, 340, 380, and 395 nm) and for PAR. The UV attenuation coefficients were 9.6–12.7 m−1 for snow and 1.57–2.05 m−1 for pack ice. The PAR attenuation coefficients were 10.5 m−1 (snow) and 1.52 m−1 (pack ice). The attenuation coefficients for erythemally weighted UVB radiation were 11.3 m−1 (snow) and 1.82 m−1 (pack ice). The analysis also estimated the reflection coefficient (albedo) of snow as 0.67 for UV wavelengths and 0.68 for PAR, but the snow cover was not always optically thick.

Item Details

Item Type:Refereed Article
Keywords:Optical propagation in absorbing media, solar radiation, ultraviolet (UV) radiometry
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Glaciology
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Marine Oceanic Processes (excl. climate related)
Author:Michael, KJ (Dr Kelvin Michael)
Author:Higgins, J (Dr Jane Higgins)
ID Code:88452
Year Published:2014 (online first 2013)
Web of Science® Times Cited:3
Deposited By:IMAS Research and Education Centre
Deposited On:2014-02-04
Last Modified:2017-10-26
Downloads:0

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