Quasi-Lagrangian Measurements of Nitric Acid Trihydrate Formation Over Antarctica
©2013. The Authors. In 2010, the joint French-United States Concordiasi project released 19 long-duration superpressure balloons from McMurdo Station, Antarctica. Four of these balloons carried a gondola with particle counters and temperature sensors to measure polar stratospheric clouds. One gondol...
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Online Access: | https://hdl.handle.net/20.500.11919/672 https://doi.org/10.1002/2013JD020326 |
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ftcolostateunidc:oai:mountainscholar.org:20.500.11919/672 2023-05-15T13:37:30+02:00 Quasi-Lagrangian Measurements of Nitric Acid Trihydrate Formation Over Antarctica Ward, S. M. Deshler, Terry Hertzog, A. 2014-01-15 application/pdf https://hdl.handle.net/20.500.11919/672 https://doi.org/10.1002/2013JD020326 English eng eng University of Wyoming. Libraries Faculty Publications - Atmospheric Science https://hdl.handle.net/20.500.11919/672 doi:10.1002/2013JD020326 Atmospheric Science Faculty Publications Aerosols Balloons Lagrange multipliers Nitric acid Aerosol measurement Equilibrium temperatures Nucleation rate Particle volume Polar stratospheric clouds Potential temperature Stratospheric aerosols Supercooled ternary solutions Measurements atmospheric pollution balloon observation droplet Lagrangian analysis polar stratospheric cloud sensor size distribution Antarctica East Antarctica McMurdo Station Engineering Journal contribution 2014 ftcolostateunidc https://doi.org/20.500.11919/672 https://doi.org/10.1002/2013JD020326 2021-07-14T21:07:26Z ©2013. The Authors. In 2010, the joint French-United States Concordiasi project released 19 long-duration superpressure balloons from McMurdo Station, Antarctica. Four of these balloons carried a gondola with particle counters and temperature sensors to measure polar stratospheric clouds. One gondola spent 5 days at stable temperatures between equilibrium temperatures for nitric acid trihydrate (NAT) and for supercooled ternary solution droplets. Sporadic particles with radii between 0.46 μm and 4.5 μm were measured in a small fraction of the measurements. At these times the corresponding size distributions and total particle volumes were consistent with NAT. Although the fraction of these observations was less than 3%, their frequency increased with time over the 5 days. From this frequency the NAT nucleation rate at 3°C below T NAT was estimated to be 2 × 10-4 m-3 s-1 ± 60% for these late winter austral NAT observations at a potential temperature of 410-415 K. Interspersed with these measurements of polar stratospheric cloud particles consistent with NAT were many more measurements of particles consistent with background stratospheric aerosol indicating that the polar stratospheric clouds sampled were highly discontinuous. Key points: Quasi-Lagrangian measurements of polar stratospheric cloud particles Balloon-borne measurements of nitric acid trihydrate formation. Other Non-Article Part of Journal/Newspaper Antarc* Antarctica East Antarctica Digital Collections of Colorado (Colorado State University) East Antarctica Austral McMurdo Station ENVELOPE(166.667,166.667,-77.850,-77.850) Lagrange ENVELOPE(-62.597,-62.597,-64.529,-64.529) Journal of Geophysical Research: Atmospheres 119 1 245 258 |
institution |
Open Polar |
collection |
Digital Collections of Colorado (Colorado State University) |
op_collection_id |
ftcolostateunidc |
language |
English |
topic |
Aerosols Balloons Lagrange multipliers Nitric acid Aerosol measurement Equilibrium temperatures Nucleation rate Particle volume Polar stratospheric clouds Potential temperature Stratospheric aerosols Supercooled ternary solutions Measurements atmospheric pollution balloon observation droplet Lagrangian analysis polar stratospheric cloud sensor size distribution Antarctica East Antarctica McMurdo Station Engineering |
spellingShingle |
Aerosols Balloons Lagrange multipliers Nitric acid Aerosol measurement Equilibrium temperatures Nucleation rate Particle volume Polar stratospheric clouds Potential temperature Stratospheric aerosols Supercooled ternary solutions Measurements atmospheric pollution balloon observation droplet Lagrangian analysis polar stratospheric cloud sensor size distribution Antarctica East Antarctica McMurdo Station Engineering Ward, S. M. Deshler, Terry Hertzog, A. Quasi-Lagrangian Measurements of Nitric Acid Trihydrate Formation Over Antarctica |
topic_facet |
Aerosols Balloons Lagrange multipliers Nitric acid Aerosol measurement Equilibrium temperatures Nucleation rate Particle volume Polar stratospheric clouds Potential temperature Stratospheric aerosols Supercooled ternary solutions Measurements atmospheric pollution balloon observation droplet Lagrangian analysis polar stratospheric cloud sensor size distribution Antarctica East Antarctica McMurdo Station Engineering |
description |
©2013. The Authors. In 2010, the joint French-United States Concordiasi project released 19 long-duration superpressure balloons from McMurdo Station, Antarctica. Four of these balloons carried a gondola with particle counters and temperature sensors to measure polar stratospheric clouds. One gondola spent 5 days at stable temperatures between equilibrium temperatures for nitric acid trihydrate (NAT) and for supercooled ternary solution droplets. Sporadic particles with radii between 0.46 μm and 4.5 μm were measured in a small fraction of the measurements. At these times the corresponding size distributions and total particle volumes were consistent with NAT. Although the fraction of these observations was less than 3%, their frequency increased with time over the 5 days. From this frequency the NAT nucleation rate at 3°C below T NAT was estimated to be 2 × 10-4 m-3 s-1 ± 60% for these late winter austral NAT observations at a potential temperature of 410-415 K. Interspersed with these measurements of polar stratospheric cloud particles consistent with NAT were many more measurements of particles consistent with background stratospheric aerosol indicating that the polar stratospheric clouds sampled were highly discontinuous. Key points: Quasi-Lagrangian measurements of polar stratospheric cloud particles Balloon-borne measurements of nitric acid trihydrate formation. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Ward, S. M. Deshler, Terry Hertzog, A. |
author_facet |
Ward, S. M. Deshler, Terry Hertzog, A. |
author_sort |
Ward, S. M. |
title |
Quasi-Lagrangian Measurements of Nitric Acid Trihydrate Formation Over Antarctica |
title_short |
Quasi-Lagrangian Measurements of Nitric Acid Trihydrate Formation Over Antarctica |
title_full |
Quasi-Lagrangian Measurements of Nitric Acid Trihydrate Formation Over Antarctica |
title_fullStr |
Quasi-Lagrangian Measurements of Nitric Acid Trihydrate Formation Over Antarctica |
title_full_unstemmed |
Quasi-Lagrangian Measurements of Nitric Acid Trihydrate Formation Over Antarctica |
title_sort |
quasi-lagrangian measurements of nitric acid trihydrate formation over antarctica |
publisher |
University of Wyoming. Libraries |
publishDate |
2014 |
url |
https://hdl.handle.net/20.500.11919/672 https://doi.org/10.1002/2013JD020326 |
long_lat |
ENVELOPE(166.667,166.667,-77.850,-77.850) ENVELOPE(-62.597,-62.597,-64.529,-64.529) |
geographic |
East Antarctica Austral McMurdo Station Lagrange |
geographic_facet |
East Antarctica Austral McMurdo Station Lagrange |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
Atmospheric Science Faculty Publications |
op_relation |
Faculty Publications - Atmospheric Science https://hdl.handle.net/20.500.11919/672 doi:10.1002/2013JD020326 |
op_doi |
https://doi.org/20.500.11919/672 https://doi.org/10.1002/2013JD020326 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
119 |
container_issue |
1 |
container_start_page |
245 |
op_container_end_page |
258 |
_version_ |
1766092741442273280 |