Sensitivity of polar stratospheric cloud formation to changes in water vapour and temperature
More than a decade ago it was suggested that a cooling of stratospheric temperatures by 1 K or an increase of 1 ppmv of stratospheric water vapour could promote denitrification, the permanent removal of nitrogen species from the stratosphere by solid polar stratospheric cloud (PSC) particles. In fac...
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ftchalmersuniv:oai:research.chalmers.se:233851 2023-05-15T15:02:21+02:00 Sensitivity of polar stratospheric cloud formation to changes in water vapour and temperature Khosrawi, F. Urban, Joachim Lossow, S. Stiller, G. Weigel, K. Braesicke, P. Pitts, M. C. Rozanov, A. Burrows, J. P. Murtagh, Donal 2016 text https://doi.org/10.5194/acp-16-101-2016 https://research.chalmers.se/en/publication/233851 unknown http://dx.doi.org/10.5194/acp-16-101-2016 https://research.chalmers.se/en/publication/233851 Meteorology and Atmospheric Sciences 2016 ftchalmersuniv https://doi.org/10.5194/acp-16-101-2016 2022-12-11T07:07:11Z More than a decade ago it was suggested that a cooling of stratospheric temperatures by 1 K or an increase of 1 ppmv of stratospheric water vapour could promote denitrification, the permanent removal of nitrogen species from the stratosphere by solid polar stratospheric cloud (PSC) particles. In fact, during the two Arctic winters 2009/10 and 2010/11 the strongest denitrification in the recent decade was observed. Sensitivity studies along air parcel trajectories are performed to test how a future stratospheric water vapour (H2O) increase of 1 ppmv or a temperature decrease of 1K would affect PSC formation. We perform our study based on measurements made during the Arctic winter 2010/11. Air parcel trajectories were calculated 6 days backward in time based on PSCs detected by CALIPSO (Cloud Aerosol Lidar and Infrared Pathfinder satellite observations). The sensitivity study was performed on single trajectories as well as on a trajectory ensemble. The sensitivity study shows a clear prolongation of the potential for PSC formation and PSC existence when the temperature in the stratosphere is decreased by 1K and water vapour is increased by 1 ppmv. Based on 15 years of satellite measurements (20002014) from UARS/HALOE, Envisat/MIPAS, Odin/SMR, Aura/MLS, Envisat/SCIAMACHY and SCISAT/ACE-FTS it is further investigated if there is a decrease in temperature and/or increase of water vapour (H2O) observed in the polar regions similar to that observed at midlatitudes and in the tropics. Performing linear regression analyses we derive from the Envisat/MIPAS (2002-2012) and Aura/MLS (2004-2014) observations predominantly positive changes in the potential temperature range 350 to 1000 K. The linear changes in water vapour derived from Envisat/MIPAS observations are largely insignificant, while those from Aura/MLS are mostly significant. For the temperature neither of the two instruments indicate any significant changes. Given the strong inter-annual variation observed in water vapour and particular temperature the severe ... Other/Unknown Material Arctic Chalmers University of Technology: Chalmers research Arctic Atmospheric Chemistry and Physics 16 1 101 121 |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers research |
op_collection_id |
ftchalmersuniv |
language |
unknown |
topic |
Meteorology and Atmospheric Sciences |
spellingShingle |
Meteorology and Atmospheric Sciences Khosrawi, F. Urban, Joachim Lossow, S. Stiller, G. Weigel, K. Braesicke, P. Pitts, M. C. Rozanov, A. Burrows, J. P. Murtagh, Donal Sensitivity of polar stratospheric cloud formation to changes in water vapour and temperature |
topic_facet |
Meteorology and Atmospheric Sciences |
description |
More than a decade ago it was suggested that a cooling of stratospheric temperatures by 1 K or an increase of 1 ppmv of stratospheric water vapour could promote denitrification, the permanent removal of nitrogen species from the stratosphere by solid polar stratospheric cloud (PSC) particles. In fact, during the two Arctic winters 2009/10 and 2010/11 the strongest denitrification in the recent decade was observed. Sensitivity studies along air parcel trajectories are performed to test how a future stratospheric water vapour (H2O) increase of 1 ppmv or a temperature decrease of 1K would affect PSC formation. We perform our study based on measurements made during the Arctic winter 2010/11. Air parcel trajectories were calculated 6 days backward in time based on PSCs detected by CALIPSO (Cloud Aerosol Lidar and Infrared Pathfinder satellite observations). The sensitivity study was performed on single trajectories as well as on a trajectory ensemble. The sensitivity study shows a clear prolongation of the potential for PSC formation and PSC existence when the temperature in the stratosphere is decreased by 1K and water vapour is increased by 1 ppmv. Based on 15 years of satellite measurements (20002014) from UARS/HALOE, Envisat/MIPAS, Odin/SMR, Aura/MLS, Envisat/SCIAMACHY and SCISAT/ACE-FTS it is further investigated if there is a decrease in temperature and/or increase of water vapour (H2O) observed in the polar regions similar to that observed at midlatitudes and in the tropics. Performing linear regression analyses we derive from the Envisat/MIPAS (2002-2012) and Aura/MLS (2004-2014) observations predominantly positive changes in the potential temperature range 350 to 1000 K. The linear changes in water vapour derived from Envisat/MIPAS observations are largely insignificant, while those from Aura/MLS are mostly significant. For the temperature neither of the two instruments indicate any significant changes. Given the strong inter-annual variation observed in water vapour and particular temperature the severe ... |
author |
Khosrawi, F. Urban, Joachim Lossow, S. Stiller, G. Weigel, K. Braesicke, P. Pitts, M. C. Rozanov, A. Burrows, J. P. Murtagh, Donal |
author_facet |
Khosrawi, F. Urban, Joachim Lossow, S. Stiller, G. Weigel, K. Braesicke, P. Pitts, M. C. Rozanov, A. Burrows, J. P. Murtagh, Donal |
author_sort |
Khosrawi, F. |
title |
Sensitivity of polar stratospheric cloud formation to changes in water vapour and temperature |
title_short |
Sensitivity of polar stratospheric cloud formation to changes in water vapour and temperature |
title_full |
Sensitivity of polar stratospheric cloud formation to changes in water vapour and temperature |
title_fullStr |
Sensitivity of polar stratospheric cloud formation to changes in water vapour and temperature |
title_full_unstemmed |
Sensitivity of polar stratospheric cloud formation to changes in water vapour and temperature |
title_sort |
sensitivity of polar stratospheric cloud formation to changes in water vapour and temperature |
publishDate |
2016 |
url |
https://doi.org/10.5194/acp-16-101-2016 https://research.chalmers.se/en/publication/233851 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
http://dx.doi.org/10.5194/acp-16-101-2016 https://research.chalmers.se/en/publication/233851 |
op_doi |
https://doi.org/10.5194/acp-16-101-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
1 |
container_start_page |
101 |
op_container_end_page |
121 |
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1766334313034416128 |