Homogeneous freezing nucleation of stratospheric solution droplets
The classical theory of homogeneous nucleation was used to calculate the freezing rate of sulfuric acid solution aerosols under stratospheric conditions. The freezing of stratospheric aerosols would be important for the nucleation of nitric acid trihydrate particles in the Arctic and Antarctic strat...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19910071867 2023-05-15T14:03:21+02:00 Homogeneous freezing nucleation of stratospheric solution droplets Jensen, Eric J. Toon, Owen B. Hamill, Patrick Unclassified, Unlimited, Publicly available Oct 1, 1991 http://ntrs.nasa.gov/search.jsp?R=19910071867 unknown http://ntrs.nasa.gov/search.jsp?R=19910071867 Accession ID: 91A56490 Copyright Other Sources 46 Geophysical Research Letters; 18; 1857-186 1991 ftnasantrs 2012-02-15T19:08:18Z The classical theory of homogeneous nucleation was used to calculate the freezing rate of sulfuric acid solution aerosols under stratospheric conditions. The freezing of stratospheric aerosols would be important for the nucleation of nitric acid trihydrate particles in the Arctic and Antarctic stratospheres. In addition, the rate of heterogeneous chemical reactions on stratospheric aerosols may be very sensitive to their state. The calculations indicate that homogeneous freezing nucleation of pure water ice in the stratospheric solution droplets would occur at temperatures below about 192 K. However, the physical properties of H2SO4 solution at such low temperatures are not well known, and it is possible that sulfuric acid aerosols will freeze out at temperatures ranging from about 180 to 195 K. It is also shown that the temperature at which the aerosols freeze is nearly independent of their size. Other/Unknown Material Antarc* Antarctic Arctic NASA Technical Reports Server (NTRS) Antarctic Arctic |
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NASA Technical Reports Server (NTRS) |
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46 Jensen, Eric J. Toon, Owen B. Hamill, Patrick Homogeneous freezing nucleation of stratospheric solution droplets |
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46 |
description |
The classical theory of homogeneous nucleation was used to calculate the freezing rate of sulfuric acid solution aerosols under stratospheric conditions. The freezing of stratospheric aerosols would be important for the nucleation of nitric acid trihydrate particles in the Arctic and Antarctic stratospheres. In addition, the rate of heterogeneous chemical reactions on stratospheric aerosols may be very sensitive to their state. The calculations indicate that homogeneous freezing nucleation of pure water ice in the stratospheric solution droplets would occur at temperatures below about 192 K. However, the physical properties of H2SO4 solution at such low temperatures are not well known, and it is possible that sulfuric acid aerosols will freeze out at temperatures ranging from about 180 to 195 K. It is also shown that the temperature at which the aerosols freeze is nearly independent of their size. |
format |
Other/Unknown Material |
author |
Jensen, Eric J. Toon, Owen B. Hamill, Patrick |
author_facet |
Jensen, Eric J. Toon, Owen B. Hamill, Patrick |
author_sort |
Jensen, Eric J. |
title |
Homogeneous freezing nucleation of stratospheric solution droplets |
title_short |
Homogeneous freezing nucleation of stratospheric solution droplets |
title_full |
Homogeneous freezing nucleation of stratospheric solution droplets |
title_fullStr |
Homogeneous freezing nucleation of stratospheric solution droplets |
title_full_unstemmed |
Homogeneous freezing nucleation of stratospheric solution droplets |
title_sort |
homogeneous freezing nucleation of stratospheric solution droplets |
publishDate |
1991 |
url |
http://ntrs.nasa.gov/search.jsp?R=19910071867 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic Arctic |
geographic_facet |
Antarctic Arctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19910071867 Accession ID: 91A56490 |
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Copyright |
_version_ |
1766273971678871552 |