Denitrification by large NAT particles: the impact of reduced settling velocities and hints on particle characteristics
Vertical redistribution of HNO3 through large HNO3-containing particles associated with polar stratospheric clouds (PSCs) plays an important role in the chemistry of the Arctic winter stratosphere. During the RECONCILE (Reconciliation of essential process parameters for an enhanced predictability of...
Main Authors: | , , , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
European Geosciences Union
2015
|
Subjects: | |
Online Access: | https://publikationen.bibliothek.kit.edu/1000045957 https://publikationen.bibliothek.kit.edu/1000045957/3426366 https://doi.org/10.5445/IR/1000045957 http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:swb:90-459578 |
id |
ftubkarlsruhe:oai:EVASTAR-Karlsruhe.de:1000045957 |
---|---|
record_format |
openpolar |
spelling |
ftubkarlsruhe:oai:EVASTAR-Karlsruhe.de:1000045957 2023-05-15T15:02:08+02:00 Denitrification by large NAT particles: the impact of reduced settling velocities and hints on particle characteristics Woiwode, W. Grooß, J.-U. Oelhaf, H. Molleker, S. Borrmann, S. Ebersoldt, A. Frey, W. Gulde, T. Khaykin, S. Maucher, G. Piesch, C. Orphal, J. 2015-02-26 application/pdf https://publikationen.bibliothek.kit.edu/1000045957 https://publikationen.bibliothek.kit.edu/1000045957/3426366 https://doi.org/10.5445/IR/1000045957 http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:swb:90-459578 eng eng European Geosciences Union info:eu-repo/semantics/altIdentifier/wos/000344165800032 info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-14-11525-2014 info:eu-repo/semantics/altIdentifier/issn/1680-7316 info:eu-repo/semantics/altIdentifier/issn/1680-7324 https://publikationen.bibliothek.kit.edu/1000045957 https://publikationen.bibliothek.kit.edu/1000045957/3426366 https://doi.org/10.5445/IR/1000045957 http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:swb:90-459578 KITopen License, https://publikationen.bibliothek.kit.edu/kitopen-lizenz info:eu-repo/semantics/openAccess Atmospheric chemistry and physics, 14 (20), 11525-11544 ISSN: 1680-7316, 1680-7324 ddc:550 Earth sciences info:eu-repo/classification/ddc/550 doc-type:article Text info:eu-repo/semantics/article article info:eu-repo/semantics/publishedVersion 2015 ftubkarlsruhe https://doi.org/10.5445/IR/1000045957 https://doi.org/10.5194/acp-14-11525-2014 2022-03-23T18:44:10Z Vertical redistribution of HNO3 through large HNO3-containing particles associated with polar stratospheric clouds (PSCs) plays an important role in the chemistry of the Arctic winter stratosphere. During the RECONCILE (Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions) campaign, apparently very large NAT (nitric acid trihydrate) particles were observed by the airborne in situ probe FSSP-100 (Molleker et al., 2014). Our analysis shows that the FSSP-100 observations associated with the flight on 25 January 2010 cannot easily be explained assuming compact spherical NAT particles due to much too short growing time at temperatures below the existence temperature of NAT (TNAT). State-of-the-art simulations using CLaMS (Chemical Lagrangian Model of the Stratosphere; Grooß et al., 2014) suggest considerably smaller particles. We consider the hypothesis that the simulation reproduces the NAT particle masses in a realistic way, but that real NAT particles may have larger apparent sizes compared to compact spherical particles, e.g. due to non-compact morphology or aspheric shape. Our study focuses on the consequence that such particles would have reduced settling velocities compared to compact spheres, altering the vertical redistribution of HNO3. Utilising CLaMS simulations, we investigate the impact of reduced settling velocities of NAT particles on vertical HNO3 redistribution and compare the results with observations of gas-phase HNO3 by the airborne Fourier transform spectrometer MIPAS-STR associated with two RECONCILE flights. The MIPAS-STR observations confirm conditions consistent with denitrification by NAT particles for the flight on 25 January 2010 and show good agreement with the simulations within the limitations of the comparison. Best agreement is found if settling velocities between 100 and 50% relative to compact spherical particles are considered (slight preference for the 70% scenario). In contrast, relative ... Article in Journal/Newspaper Arctic KITopen (Karlsruhe Institute of Technologie) Arctic |
institution |
Open Polar |
collection |
KITopen (Karlsruhe Institute of Technologie) |
op_collection_id |
ftubkarlsruhe |
language |
English |
topic |
ddc:550 Earth sciences info:eu-repo/classification/ddc/550 |
spellingShingle |
ddc:550 Earth sciences info:eu-repo/classification/ddc/550 Woiwode, W. Grooß, J.-U. Oelhaf, H. Molleker, S. Borrmann, S. Ebersoldt, A. Frey, W. Gulde, T. Khaykin, S. Maucher, G. Piesch, C. Orphal, J. Denitrification by large NAT particles: the impact of reduced settling velocities and hints on particle characteristics |
topic_facet |
ddc:550 Earth sciences info:eu-repo/classification/ddc/550 |
description |
Vertical redistribution of HNO3 through large HNO3-containing particles associated with polar stratospheric clouds (PSCs) plays an important role in the chemistry of the Arctic winter stratosphere. During the RECONCILE (Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions) campaign, apparently very large NAT (nitric acid trihydrate) particles were observed by the airborne in situ probe FSSP-100 (Molleker et al., 2014). Our analysis shows that the FSSP-100 observations associated with the flight on 25 January 2010 cannot easily be explained assuming compact spherical NAT particles due to much too short growing time at temperatures below the existence temperature of NAT (TNAT). State-of-the-art simulations using CLaMS (Chemical Lagrangian Model of the Stratosphere; Grooß et al., 2014) suggest considerably smaller particles. We consider the hypothesis that the simulation reproduces the NAT particle masses in a realistic way, but that real NAT particles may have larger apparent sizes compared to compact spherical particles, e.g. due to non-compact morphology or aspheric shape. Our study focuses on the consequence that such particles would have reduced settling velocities compared to compact spheres, altering the vertical redistribution of HNO3. Utilising CLaMS simulations, we investigate the impact of reduced settling velocities of NAT particles on vertical HNO3 redistribution and compare the results with observations of gas-phase HNO3 by the airborne Fourier transform spectrometer MIPAS-STR associated with two RECONCILE flights. The MIPAS-STR observations confirm conditions consistent with denitrification by NAT particles for the flight on 25 January 2010 and show good agreement with the simulations within the limitations of the comparison. Best agreement is found if settling velocities between 100 and 50% relative to compact spherical particles are considered (slight preference for the 70% scenario). In contrast, relative ... |
format |
Article in Journal/Newspaper |
author |
Woiwode, W. Grooß, J.-U. Oelhaf, H. Molleker, S. Borrmann, S. Ebersoldt, A. Frey, W. Gulde, T. Khaykin, S. Maucher, G. Piesch, C. Orphal, J. |
author_facet |
Woiwode, W. Grooß, J.-U. Oelhaf, H. Molleker, S. Borrmann, S. Ebersoldt, A. Frey, W. Gulde, T. Khaykin, S. Maucher, G. Piesch, C. Orphal, J. |
author_sort |
Woiwode, W. |
title |
Denitrification by large NAT particles: the impact of reduced settling velocities and hints on particle characteristics |
title_short |
Denitrification by large NAT particles: the impact of reduced settling velocities and hints on particle characteristics |
title_full |
Denitrification by large NAT particles: the impact of reduced settling velocities and hints on particle characteristics |
title_fullStr |
Denitrification by large NAT particles: the impact of reduced settling velocities and hints on particle characteristics |
title_full_unstemmed |
Denitrification by large NAT particles: the impact of reduced settling velocities and hints on particle characteristics |
title_sort |
denitrification by large nat particles: the impact of reduced settling velocities and hints on particle characteristics |
publisher |
European Geosciences Union |
publishDate |
2015 |
url |
https://publikationen.bibliothek.kit.edu/1000045957 https://publikationen.bibliothek.kit.edu/1000045957/3426366 https://doi.org/10.5445/IR/1000045957 http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:swb:90-459578 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric chemistry and physics, 14 (20), 11525-11544 ISSN: 1680-7316, 1680-7324 |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000344165800032 info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-14-11525-2014 info:eu-repo/semantics/altIdentifier/issn/1680-7316 info:eu-repo/semantics/altIdentifier/issn/1680-7324 https://publikationen.bibliothek.kit.edu/1000045957 https://publikationen.bibliothek.kit.edu/1000045957/3426366 https://doi.org/10.5445/IR/1000045957 http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:swb:90-459578 |
op_rights |
KITopen License, https://publikationen.bibliothek.kit.edu/kitopen-lizenz info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5445/IR/1000045957 https://doi.org/10.5194/acp-14-11525-2014 |
_version_ |
1766334122257547264 |