Changes in biologically active ultraviolet radiation reaching the Earth's surface
The Montreal Protocol is working. Concentrations of major ozone-depleting substances in the atmosphere are now decreasing, and the decline in total column amounts seen in the 1980s and 1990s at mid-latitudes has not continued. In polar regions, there is much greater natural variability. Each spring,...
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Royal Society of Chemistry
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ftulundlup:oai:lup.lub.lu.se:1eaba432-3365-4a1b-99c9-cc838bd2c883 2023-05-15T14:03:10+02:00 Changes in biologically active ultraviolet radiation reaching the Earth's surface McKenzie, Richard L. Aucamp, Pieter J. Bais, Alkiviades F. Björn, Lars Olof Ilyas, Mohammad 2007 https://lup.lub.lu.se/record/630222 eng eng Royal Society of Chemistry https://lup.lub.lu.se/record/630222 wos:000244739000014 scopus:33847725348 Photochemical and Photobiological Sciences; 6(3), pp 218-231 (2007) ISSN: 1474-9092 Biological Sciences contributiontojournal/article info:eu-repo/semantics/article text 2007 ftulundlup 2023-02-01T23:32:57Z The Montreal Protocol is working. Concentrations of major ozone-depleting substances in the atmosphere are now decreasing, and the decline in total column amounts seen in the 1980s and 1990s at mid-latitudes has not continued. In polar regions, there is much greater natural variability. Each spring, large ozone holes continue to occur in Antarctica and less severe regions of depleted ozone continue to occur in the Arctic. There is evidence that some of these changes are driven by changes in atmospheric circulation rather than being solely attributable to reductions in ozone-depleting substances, which may indicate a linkage to climate change. Global ozone is still lower than in the 1970s and a return to that state is not expected for several decades. As changes in ozone impinge directly on UV radiation, elevated UV radiation due to reduced ozone is expected to continue over that period. Long-term changes in UV-B due to ozone depletion are difficult to verify through direct measurement, but there is strong evidence that UV-B irradiance increased over the period of ozone depletion. At unpolluted sites in the southern hemisphere, there is some evidence that UV-B irradiance has diminished since the late 1990s. The availability and temporal extent of UV data have improved, and we are now able to evaluate the changes in recent times compared with those estimated since the late 1920s, when ozone measurements first became available. The increases in UV-B irradiance over the latter part of the 20th century have been larger than the natural variability. There is increased evidence that aerosols have a larger effect on surface UV-B radiation than previously thought. At some sites in the Northern Hemisphere, UV-B irradiance may continue to increase because of continuing reductions in aerosol extinctions since the 1990s. Interactions between ozone depletion and climate change are complex and can be mediated through changes in chemistry, radiation, and atmospheric circulation patterns. The changes can be in both directions: ... Article in Journal/Newspaper Antarc* Antarctica Arctic Climate change Lund University Publications (LUP) Arctic |
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English |
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Biological Sciences |
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Biological Sciences McKenzie, Richard L. Aucamp, Pieter J. Bais, Alkiviades F. Björn, Lars Olof Ilyas, Mohammad Changes in biologically active ultraviolet radiation reaching the Earth's surface |
topic_facet |
Biological Sciences |
description |
The Montreal Protocol is working. Concentrations of major ozone-depleting substances in the atmosphere are now decreasing, and the decline in total column amounts seen in the 1980s and 1990s at mid-latitudes has not continued. In polar regions, there is much greater natural variability. Each spring, large ozone holes continue to occur in Antarctica and less severe regions of depleted ozone continue to occur in the Arctic. There is evidence that some of these changes are driven by changes in atmospheric circulation rather than being solely attributable to reductions in ozone-depleting substances, which may indicate a linkage to climate change. Global ozone is still lower than in the 1970s and a return to that state is not expected for several decades. As changes in ozone impinge directly on UV radiation, elevated UV radiation due to reduced ozone is expected to continue over that period. Long-term changes in UV-B due to ozone depletion are difficult to verify through direct measurement, but there is strong evidence that UV-B irradiance increased over the period of ozone depletion. At unpolluted sites in the southern hemisphere, there is some evidence that UV-B irradiance has diminished since the late 1990s. The availability and temporal extent of UV data have improved, and we are now able to evaluate the changes in recent times compared with those estimated since the late 1920s, when ozone measurements first became available. The increases in UV-B irradiance over the latter part of the 20th century have been larger than the natural variability. There is increased evidence that aerosols have a larger effect on surface UV-B radiation than previously thought. At some sites in the Northern Hemisphere, UV-B irradiance may continue to increase because of continuing reductions in aerosol extinctions since the 1990s. Interactions between ozone depletion and climate change are complex and can be mediated through changes in chemistry, radiation, and atmospheric circulation patterns. The changes can be in both directions: ... |
format |
Article in Journal/Newspaper |
author |
McKenzie, Richard L. Aucamp, Pieter J. Bais, Alkiviades F. Björn, Lars Olof Ilyas, Mohammad |
author_facet |
McKenzie, Richard L. Aucamp, Pieter J. Bais, Alkiviades F. Björn, Lars Olof Ilyas, Mohammad |
author_sort |
McKenzie, Richard L. |
title |
Changes in biologically active ultraviolet radiation reaching the Earth's surface |
title_short |
Changes in biologically active ultraviolet radiation reaching the Earth's surface |
title_full |
Changes in biologically active ultraviolet radiation reaching the Earth's surface |
title_fullStr |
Changes in biologically active ultraviolet radiation reaching the Earth's surface |
title_full_unstemmed |
Changes in biologically active ultraviolet radiation reaching the Earth's surface |
title_sort |
changes in biologically active ultraviolet radiation reaching the earth's surface |
publisher |
Royal Society of Chemistry |
publishDate |
2007 |
url |
https://lup.lub.lu.se/record/630222 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Antarc* Antarctica Arctic Climate change |
genre_facet |
Antarc* Antarctica Arctic Climate change |
op_source |
Photochemical and Photobiological Sciences; 6(3), pp 218-231 (2007) ISSN: 1474-9092 |
op_relation |
https://lup.lub.lu.se/record/630222 wos:000244739000014 scopus:33847725348 |
_version_ |
1766273729256488960 |