STRATOSPH ERIC OZONE DEPLETION ' A REVIEW OF CONCEPTS AND HISTORY

Abstract. Stratospheric ozone depletion through catalytic chemistry involving man-made chlorofluorocarbons is an area of focus in the study of geophysics and one of the global environmental issues of the twentieth century. This review presents a brief history of the science of ozone depletion and de...

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Main Author: Susan Solomon
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.380.6654
http://www.leif.org/EOS/1999RG900008.pdf
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spelling ftciteseerx:oai:CiteSeerX.psu:10.1.1.380.6654 2023-05-15T13:51:46+02:00 STRATOSPH ERIC OZONE DEPLETION ' A REVIEW OF CONCEPTS AND HISTORY Susan Solomon The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.380.6654 http://www.leif.org/EOS/1999RG900008.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.380.6654 http://www.leif.org/EOS/1999RG900008.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.leif.org/EOS/1999RG900008.pdf text ftciteseerx 2016-09-18T00:22:14Z Abstract. Stratospheric ozone depletion through catalytic chemistry involving man-made chlorofluorocarbons is an area of focus in the study of geophysics and one of the global environmental issues of the twentieth century. This review presents a brief history of the science of ozone depletion and describes a conceptual framework to explain the key processes involved, with a focus on chemistry. Observations that may be considered as evidence (fingerprints) of ozone depletion due to chlorofluorocarbons are explored, and the related gas phase and surface chemistry is described. Observations of ozone and of chlorine-related trace gases near 40 km provide evidence that gas phase chemistry has indeed currently depleted about 10 % of the stratospheric ozone there as predicted, and the vertical and horizontal struc-tures of this depletion are fingerprints for that process. More striking changes are observed each austral spring in Antarctica, where about half of the total ozone column is depleted each September, forming the Antarctic ozone hole. Measurements of large amounts of C10, a key ozone destruction catalyst, are among the finger-prints showing that human releases of chlorofluorocarbons are the primary cause of this change. Enhanced ozone depletion in the Antarctic and Arctic regions is linked to heterogeneous chlorine chemistry that occurs on the surfaces of polar stratospheric clouds at cold temperatures. Observations also show that some of the same heterogeneous chemistry occurs on the surfaces of particles present at midlatitudes as well, and the abundances of these particles are enhanced following explosive volcanic eruptions. The partitioning of chlorine between active forms that destroy ozone and inert reservoirs that sequester it is a central part of the framework for our understanding of the 40-km ozone decline, the Antarctic ozone hole, the recent Arctic ozone losses in particularly cold years, and the observation of record midlatitude ozone depletion after the major eruption of Mount Pinatubo in the ... Text Antarc* Antarctic Antarctica Arctic Unknown Antarctic Arctic Austral The Antarctic
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description Abstract. Stratospheric ozone depletion through catalytic chemistry involving man-made chlorofluorocarbons is an area of focus in the study of geophysics and one of the global environmental issues of the twentieth century. This review presents a brief history of the science of ozone depletion and describes a conceptual framework to explain the key processes involved, with a focus on chemistry. Observations that may be considered as evidence (fingerprints) of ozone depletion due to chlorofluorocarbons are explored, and the related gas phase and surface chemistry is described. Observations of ozone and of chlorine-related trace gases near 40 km provide evidence that gas phase chemistry has indeed currently depleted about 10 % of the stratospheric ozone there as predicted, and the vertical and horizontal struc-tures of this depletion are fingerprints for that process. More striking changes are observed each austral spring in Antarctica, where about half of the total ozone column is depleted each September, forming the Antarctic ozone hole. Measurements of large amounts of C10, a key ozone destruction catalyst, are among the finger-prints showing that human releases of chlorofluorocarbons are the primary cause of this change. Enhanced ozone depletion in the Antarctic and Arctic regions is linked to heterogeneous chlorine chemistry that occurs on the surfaces of polar stratospheric clouds at cold temperatures. Observations also show that some of the same heterogeneous chemistry occurs on the surfaces of particles present at midlatitudes as well, and the abundances of these particles are enhanced following explosive volcanic eruptions. The partitioning of chlorine between active forms that destroy ozone and inert reservoirs that sequester it is a central part of the framework for our understanding of the 40-km ozone decline, the Antarctic ozone hole, the recent Arctic ozone losses in particularly cold years, and the observation of record midlatitude ozone depletion after the major eruption of Mount Pinatubo in the ...
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author Susan Solomon
spellingShingle Susan Solomon
STRATOSPH ERIC OZONE DEPLETION ' A REVIEW OF CONCEPTS AND HISTORY
author_facet Susan Solomon
author_sort Susan Solomon
title STRATOSPH ERIC OZONE DEPLETION ' A REVIEW OF CONCEPTS AND HISTORY
title_short STRATOSPH ERIC OZONE DEPLETION ' A REVIEW OF CONCEPTS AND HISTORY
title_full STRATOSPH ERIC OZONE DEPLETION ' A REVIEW OF CONCEPTS AND HISTORY
title_fullStr STRATOSPH ERIC OZONE DEPLETION ' A REVIEW OF CONCEPTS AND HISTORY
title_full_unstemmed STRATOSPH ERIC OZONE DEPLETION ' A REVIEW OF CONCEPTS AND HISTORY
title_sort stratosph eric ozone depletion ' a review of concepts and history
url http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.380.6654
http://www.leif.org/EOS/1999RG900008.pdf
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