Lipid concentrations, UV radiation doses, and attenuation coefficients in coastal surface waters of West Antarctica ...
The seasonal depletion of stratospheric ozone over the Southern Hemisphere allows abnormally high doses of ultraviolet radiation (UVR) to reach surface waters of the West Antarctic Peninsula (WAP) in the austral spring, creating a natural laboratory for the study of lipid photooxidation in the shall...
| Main Authors: | , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
2017
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.879582 https://doi.pangaea.de/10.1594/PANGAEA.879582 |
| Summary: | The seasonal depletion of stratospheric ozone over the Southern Hemisphere allows abnormally high doses of ultraviolet radiation (UVR) to reach surface waters of the West Antarctic Peninsula (WAP) in the austral spring, creating a natural laboratory for the study of lipid photooxidation in the shallow mixed layer of the marginal ice zone. The photooxidation of lipids under such conditions has been identified as a significant source of stress to microorganisms, and short-chain fatty acids altered by photochemical processes have been found in both marine aerosols and sinking marine particle material. However, the biogeochemical impact of lipid photooxidation has not been quantitatively compared at ecosystem scale to the many other biological and abiotic processes that can transform particulate organic matter in the surface ocean. We combined results from field experiments with diverse environmental data, including high-resolution, accurate-mass HPLC-ESI-MS analysis of lipid extracts and in situ measurements of ... : Supplement to: Collins, James R; Fredricks, Helen F; Bowman, Jeff S; Ward, Collin P; Moreno, Carly; Longnecker, Krista; Marchetti, Adrian; Hansel, Colleen M; Ducklow, Hugh W; Van Mooy, Benjamin A S (2018): The molecular products and biogeochemical significance of lipid photooxidation in West Antarctic surface waters. Geochimica et Cosmochimica Acta, 232, 244-264 ... |
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