Nitric acid trihydrate nucleation and denitrification in the Arctic stratosphere
Nitric acid trihydrate (NAT) particles in the polar stratosphere have been shown to be responsible for vertical redistribution of reactive nitrogen (NOy). Recent observations by Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) aboard the CALIPSO satellite have been explained in terms of het...
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ftpubman:oai:pure.mpg.de:item_2084438 2023-08-20T04:04:23+02:00 Nitric acid trihydrate nucleation and denitrification in the Arctic stratosphere Grooß, J. Engel, I. Borrmann, S. Frey, W. Günther, G. Hoyle, C. Kivi, R. Luo, B. Molleker, S. Peter, T. Pitts, M. Schlager, H. Stiller, G. Vömel, H. Walker, K. Müller, R. 2014 http://hdl.handle.net/11858/00-001M-0000-0024-A0F6-1 unknown info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-14-1055-2014 http://hdl.handle.net/11858/00-001M-0000-0024-A0F6-1 Atmospheric Chemistry and Physics info:eu-repo/semantics/article 2014 ftpubman https://doi.org/10.5194/acp-14-1055-2014 2023-08-01T20:45:03Z Nitric acid trihydrate (NAT) particles in the polar stratosphere have been shown to be responsible for vertical redistribution of reactive nitrogen (NOy). Recent observations by Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) aboard the CALIPSO satellite have been explained in terms of heterogeneous nucleation of NAT on foreign nuclei, revealing this to be an important formation pathway for the NAT particles. In state of the art global-or regional-scale models, heterogeneous NAT nucleation is currently simulated in a very coarse manner using a constant, saturation-independent nucleation rate. Here we present first simulations for the Arctic winter 2009/2010 applying a new saturation-dependent parametrisation of heterogeneous NAT nucleation rates within the Chemical Lagrangian Model of the Stratosphere (CLaMS). The simulation shows good agreement of chemical trace species with in situ and remote sensing observations. The simulated polar stratospheric cloud (PSC) optical properties agree much better with CALIOP observations than those simulated with a constant nucleation rate model. A comparison of the simulated particle size distributions with observations made using the Forward Scattering Spectrometer Probe (FSSP) aboard the high altitude research aircraft Geophysica, shows that the model reproduces the observed size distribution, except for the very largest particles above 15 mu m diameter. The vertical NOy redistribution caused by the sedimentation of the NAT particles, in particular the denitrification and nitrification signals observed by the ACE-FTS satellite instrument and the in situ SIOUX instrument aboard the Geophysica, are reproduced by the improved model, and a small improvement with respect to the constant nucleation rate model is found. Article in Journal/Newspaper Arctic Max Planck Society: MPG.PuRe Arctic Atmospheric Chemistry and Physics 14 2 1055 1073 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
unknown |
description |
Nitric acid trihydrate (NAT) particles in the polar stratosphere have been shown to be responsible for vertical redistribution of reactive nitrogen (NOy). Recent observations by Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) aboard the CALIPSO satellite have been explained in terms of heterogeneous nucleation of NAT on foreign nuclei, revealing this to be an important formation pathway for the NAT particles. In state of the art global-or regional-scale models, heterogeneous NAT nucleation is currently simulated in a very coarse manner using a constant, saturation-independent nucleation rate. Here we present first simulations for the Arctic winter 2009/2010 applying a new saturation-dependent parametrisation of heterogeneous NAT nucleation rates within the Chemical Lagrangian Model of the Stratosphere (CLaMS). The simulation shows good agreement of chemical trace species with in situ and remote sensing observations. The simulated polar stratospheric cloud (PSC) optical properties agree much better with CALIOP observations than those simulated with a constant nucleation rate model. A comparison of the simulated particle size distributions with observations made using the Forward Scattering Spectrometer Probe (FSSP) aboard the high altitude research aircraft Geophysica, shows that the model reproduces the observed size distribution, except for the very largest particles above 15 mu m diameter. The vertical NOy redistribution caused by the sedimentation of the NAT particles, in particular the denitrification and nitrification signals observed by the ACE-FTS satellite instrument and the in situ SIOUX instrument aboard the Geophysica, are reproduced by the improved model, and a small improvement with respect to the constant nucleation rate model is found. |
format |
Article in Journal/Newspaper |
author |
Grooß, J. Engel, I. Borrmann, S. Frey, W. Günther, G. Hoyle, C. Kivi, R. Luo, B. Molleker, S. Peter, T. Pitts, M. Schlager, H. Stiller, G. Vömel, H. Walker, K. Müller, R. |
spellingShingle |
Grooß, J. Engel, I. Borrmann, S. Frey, W. Günther, G. Hoyle, C. Kivi, R. Luo, B. Molleker, S. Peter, T. Pitts, M. Schlager, H. Stiller, G. Vömel, H. Walker, K. Müller, R. Nitric acid trihydrate nucleation and denitrification in the Arctic stratosphere |
author_facet |
Grooß, J. Engel, I. Borrmann, S. Frey, W. Günther, G. Hoyle, C. Kivi, R. Luo, B. Molleker, S. Peter, T. Pitts, M. Schlager, H. Stiller, G. Vömel, H. Walker, K. Müller, R. |
author_sort |
Grooß, J. |
title |
Nitric acid trihydrate nucleation and denitrification in the Arctic stratosphere |
title_short |
Nitric acid trihydrate nucleation and denitrification in the Arctic stratosphere |
title_full |
Nitric acid trihydrate nucleation and denitrification in the Arctic stratosphere |
title_fullStr |
Nitric acid trihydrate nucleation and denitrification in the Arctic stratosphere |
title_full_unstemmed |
Nitric acid trihydrate nucleation and denitrification in the Arctic stratosphere |
title_sort |
nitric acid trihydrate nucleation and denitrification in the arctic stratosphere |
publishDate |
2014 |
url |
http://hdl.handle.net/11858/00-001M-0000-0024-A0F6-1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric Chemistry and Physics |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-14-1055-2014 http://hdl.handle.net/11858/00-001M-0000-0024-A0F6-1 |
op_doi |
https://doi.org/10.5194/acp-14-1055-2014 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
14 |
container_issue |
2 |
container_start_page |
1055 |
op_container_end_page |
1073 |
_version_ |
1774714773433221120 |