Catastrophic loss of stratospheric ozone in dense volcanic clouds
Rapid, localized loss of ozone is predicted to occur in the midlatitude and tropical stratosphere in the presence of very large concentrations of sulfate aerosols. Volcanic eruptions can increase the effective surface area of sulfuric acid so that heterogeneous reactions involving ClONO2, and second...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19920063183 2023-05-15T14:03:21+02:00 Catastrophic loss of stratospheric ozone in dense volcanic clouds Prather, Michael Unclassified, Unlimited, Publicly available Jun 20, 1992 http://ntrs.nasa.gov/search.jsp?R=19920063183 unknown http://ntrs.nasa.gov/search.jsp?R=19920063183 Accession ID: 92A45807 Copyright Other Sources 46 Journal of Geophysical Research; 97; D9, J; 10 1992 ftnasantrs 2012-02-15T19:36:32Z Rapid, localized loss of ozone is predicted to occur in the midlatitude and tropical stratosphere in the presence of very large concentrations of sulfate aerosols. Volcanic eruptions can increase the effective surface area of sulfuric acid so that heterogeneous reactions involving ClONO2, and secondarily N2O5, are able to suppress NO(x) abundances by more than a factor of 10 relative to gas phase chemistry. When NO(x) levels fall below a threshold, e.g., 0.6 ppb at 24 km in mid-latitudes, the chlorine-catalyzed loss of O3 proceeds at rates comparable to those during the formation of the Antarctic ozone hole, more than 50 ppb per day. If such losses occurred following the eruption of Mount Pinatubo in the most volcanically perturbed regions over the tropics and mid-latitudes, this model predicts that they are driven primarily by the suppression of NO(x) below these critical levels. The increase in stratospheric chlorine since El Chichon has made Mount Pinatubo more than twice as effective in causing rapid O3 loss. Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic The Antarctic |
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NASA Technical Reports Server (NTRS) |
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46 |
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46 Prather, Michael Catastrophic loss of stratospheric ozone in dense volcanic clouds |
topic_facet |
46 |
description |
Rapid, localized loss of ozone is predicted to occur in the midlatitude and tropical stratosphere in the presence of very large concentrations of sulfate aerosols. Volcanic eruptions can increase the effective surface area of sulfuric acid so that heterogeneous reactions involving ClONO2, and secondarily N2O5, are able to suppress NO(x) abundances by more than a factor of 10 relative to gas phase chemistry. When NO(x) levels fall below a threshold, e.g., 0.6 ppb at 24 km in mid-latitudes, the chlorine-catalyzed loss of O3 proceeds at rates comparable to those during the formation of the Antarctic ozone hole, more than 50 ppb per day. If such losses occurred following the eruption of Mount Pinatubo in the most volcanically perturbed regions over the tropics and mid-latitudes, this model predicts that they are driven primarily by the suppression of NO(x) below these critical levels. The increase in stratospheric chlorine since El Chichon has made Mount Pinatubo more than twice as effective in causing rapid O3 loss. |
format |
Other/Unknown Material |
author |
Prather, Michael |
author_facet |
Prather, Michael |
author_sort |
Prather, Michael |
title |
Catastrophic loss of stratospheric ozone in dense volcanic clouds |
title_short |
Catastrophic loss of stratospheric ozone in dense volcanic clouds |
title_full |
Catastrophic loss of stratospheric ozone in dense volcanic clouds |
title_fullStr |
Catastrophic loss of stratospheric ozone in dense volcanic clouds |
title_full_unstemmed |
Catastrophic loss of stratospheric ozone in dense volcanic clouds |
title_sort |
catastrophic loss of stratospheric ozone in dense volcanic clouds |
publishDate |
1992 |
url |
http://ntrs.nasa.gov/search.jsp?R=19920063183 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19920063183 Accession ID: 92A45807 |
op_rights |
Copyright |
_version_ |
1766273982662705152 |