Control of biological exposure to UV radiation in the Arctic Ocean: Comparison of the roles of ozone and riverine dissolved organic matter. Arctic 53
ABSTRACT. Reports of severe stratospheric ozone depletion over the Arctic have heightened concern about the potential impact of rising ultraviolet-B (UV-B) radiation on north polar aquatic ecosystems. Our optical measurements and modelling results indicate that the ozone-related UV-B influence on fo...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.500.3624 2023-05-15T14:19:48+02:00 Control of biological exposure to UV radiation in the Arctic Ocean: Comparison of the roles of ozone and riverine dissolved organic matter. Arctic 53 John A. E. Gibson Warwick F. Vincent Barbara Nieke Reinhard Pienitz The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.500.3624 http://pubs.aina.ucalgary.ca/arctic/Arctic53-4-372.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.500.3624 http://pubs.aina.ucalgary.ca/arctic/Arctic53-4-372.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic53-4-372.pdf Key words Arctic CDOM DNA global change ozone depletion phytoplankton Siberia transparency text ftciteseerx 2016-01-08T09:05:32Z ABSTRACT. Reports of severe stratospheric ozone depletion over the Arctic have heightened concern about the potential impact of rising ultraviolet-B (UV-B) radiation on north polar aquatic ecosystems. Our optical measurements and modelling results indicate that the ozone-related UV-B influence on food web processes in the Arctic Ocean is likely to be small relative to the effects caused by variation in the concentrations of natural UV-absorbing compounds, known as chromophoric dissolved organic matter (CDOM), that enter the Arctic basin via its large river inflows. The aim of our present study was to develop and apply a simple bio-optical index that takes into account the combined effects of attenuation by atmospheric ozone and water column CDOM, and photobiological weighting for high-latitude environments such as the Arctic Ocean. To this end, we computed values for a biologically effective UV dose rate parameter (“weighted transparency ” or T*) based on underwater UV measurements in high-latitude lakes and rivers that discharge into the Arctic Ocean; measured incident UV radiation at Barrow, Alaska; and published biological weighting curves for UV-induced DNA damage and UV photoinhibition of photosynthesis. The results underscore how strongly the Arctic Ocean is influenced by riverine inputs: shifts in CDOM loading (e.g., through climate change, land-use practices, or changes in ocean circulation) can cause variations in biological UV exposure of much greater magnitude than ozone-related effects. Text Arctic Arctic Basin Arctic Arctic Ocean Barrow Climate change Phytoplankton Alaska Siberia Unknown Arctic Arctic Ocean |
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ftciteseerx |
language |
English |
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Key words Arctic CDOM DNA global change ozone depletion phytoplankton Siberia transparency |
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Key words Arctic CDOM DNA global change ozone depletion phytoplankton Siberia transparency John A. E. Gibson Warwick F. Vincent Barbara Nieke Reinhard Pienitz Control of biological exposure to UV radiation in the Arctic Ocean: Comparison of the roles of ozone and riverine dissolved organic matter. Arctic 53 |
topic_facet |
Key words Arctic CDOM DNA global change ozone depletion phytoplankton Siberia transparency |
description |
ABSTRACT. Reports of severe stratospheric ozone depletion over the Arctic have heightened concern about the potential impact of rising ultraviolet-B (UV-B) radiation on north polar aquatic ecosystems. Our optical measurements and modelling results indicate that the ozone-related UV-B influence on food web processes in the Arctic Ocean is likely to be small relative to the effects caused by variation in the concentrations of natural UV-absorbing compounds, known as chromophoric dissolved organic matter (CDOM), that enter the Arctic basin via its large river inflows. The aim of our present study was to develop and apply a simple bio-optical index that takes into account the combined effects of attenuation by atmospheric ozone and water column CDOM, and photobiological weighting for high-latitude environments such as the Arctic Ocean. To this end, we computed values for a biologically effective UV dose rate parameter (“weighted transparency ” or T*) based on underwater UV measurements in high-latitude lakes and rivers that discharge into the Arctic Ocean; measured incident UV radiation at Barrow, Alaska; and published biological weighting curves for UV-induced DNA damage and UV photoinhibition of photosynthesis. The results underscore how strongly the Arctic Ocean is influenced by riverine inputs: shifts in CDOM loading (e.g., through climate change, land-use practices, or changes in ocean circulation) can cause variations in biological UV exposure of much greater magnitude than ozone-related effects. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
John A. E. Gibson Warwick F. Vincent Barbara Nieke Reinhard Pienitz |
author_facet |
John A. E. Gibson Warwick F. Vincent Barbara Nieke Reinhard Pienitz |
author_sort |
John A. E. Gibson |
title |
Control of biological exposure to UV radiation in the Arctic Ocean: Comparison of the roles of ozone and riverine dissolved organic matter. Arctic 53 |
title_short |
Control of biological exposure to UV radiation in the Arctic Ocean: Comparison of the roles of ozone and riverine dissolved organic matter. Arctic 53 |
title_full |
Control of biological exposure to UV radiation in the Arctic Ocean: Comparison of the roles of ozone and riverine dissolved organic matter. Arctic 53 |
title_fullStr |
Control of biological exposure to UV radiation in the Arctic Ocean: Comparison of the roles of ozone and riverine dissolved organic matter. Arctic 53 |
title_full_unstemmed |
Control of biological exposure to UV radiation in the Arctic Ocean: Comparison of the roles of ozone and riverine dissolved organic matter. Arctic 53 |
title_sort |
control of biological exposure to uv radiation in the arctic ocean: comparison of the roles of ozone and riverine dissolved organic matter. arctic 53 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.500.3624 http://pubs.aina.ucalgary.ca/arctic/Arctic53-4-372.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Basin Arctic Arctic Ocean Barrow Climate change Phytoplankton Alaska Siberia |
genre_facet |
Arctic Arctic Basin Arctic Arctic Ocean Barrow Climate change Phytoplankton Alaska Siberia |
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http://pubs.aina.ucalgary.ca/arctic/Arctic53-4-372.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.500.3624 http://pubs.aina.ucalgary.ca/arctic/Arctic53-4-372.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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