Analysis of a jet stream induced gravity wave associated with an observed ice cloud over Greenland
International audience A polar stratospheric ice cloud (PSC type II) was observed by airborne lidar above Greenland on 14 January 2000. Is was the unique observation of an ice cloud over Greenland during the SOLVE/THESEO 2000 campaign. Mesoscale simulations with the hydrostatic HRM model are present...
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ftepunivpsaclay:oai:HAL:hal-00327900v1 2024-06-09T07:46:18+00:00 Analysis of a jet stream induced gravity wave associated with an observed ice cloud over Greenland Buss, S. Hertzog, A. Hostettler, C. Bui, T. P. Lüthi, T. Wernli, H. Institute for Atmospheric and Climate Science Zürich (IAC) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) NASA NASA Ames Research Center (ARC) 2003-11-18 https://hal.science/hal-00327900 https://hal.science/hal-00327900/document https://hal.science/hal-00327900/file/acpd-3-5875-2003.pdf en eng HAL CCSD European Geosciences Union hal-00327900 https://hal.science/hal-00327900 https://hal.science/hal-00327900/document https://hal.science/hal-00327900/file/acpd-3-5875-2003.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00327900 Atmospheric Chemistry and Physics Discussions, 2003, 3 (6), pp.5875-5918 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2003 ftepunivpsaclay 2024-05-16T12:10:49Z International audience A polar stratospheric ice cloud (PSC type II) was observed by airborne lidar above Greenland on 14 January 2000. Is was the unique observation of an ice cloud over Greenland during the SOLVE/THESEO 2000 campaign. Mesoscale simulations with the hydrostatic HRM model are presented which, in contrast to global analyses, are capable to produce a vertically propagating gravity wave that induces the low temperatures at the level of the PSC afforded for the ice formation. The simulated minimum temperature is ~8 K below the driving analyses and ~3 K below the frost point, exactly coinciding with the location of the observed ice cloud. Despite the high elevations of the Greenland orography the simulated gravity wave is not a mountain wave. Analyses of the horizontal wind divergence, of the background wind profiles, of backward gravity wave ray-tracing trajectories, of HRM experiments with reduced Greenland topography and of several instability diagnostics near the tropopause level provide consistent evidence that the wave is emitted by the geostrophic adjustment of a jet instability associated with an intense, rapidly evolving, anticyclonically curved jet stream. In order to evaluate the potential frequency of such non-orographic polar stratospheric cloud events, an approximate jet instability diagnostic is performed for the winter 1999/2000. It indicates that ice-PSCs are only occasionally generated by gravity waves emanating from an unstable jet. Article in Journal/Newspaper Greenland École Polytechnique, Université Paris-Saclay: HAL Greenland |
institution |
Open Polar |
collection |
École Polytechnique, Université Paris-Saclay: HAL |
op_collection_id |
ftepunivpsaclay |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Buss, S. Hertzog, A. Hostettler, C. Bui, T. P. Lüthi, T. Wernli, H. Analysis of a jet stream induced gravity wave associated with an observed ice cloud over Greenland |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience A polar stratospheric ice cloud (PSC type II) was observed by airborne lidar above Greenland on 14 January 2000. Is was the unique observation of an ice cloud over Greenland during the SOLVE/THESEO 2000 campaign. Mesoscale simulations with the hydrostatic HRM model are presented which, in contrast to global analyses, are capable to produce a vertically propagating gravity wave that induces the low temperatures at the level of the PSC afforded for the ice formation. The simulated minimum temperature is ~8 K below the driving analyses and ~3 K below the frost point, exactly coinciding with the location of the observed ice cloud. Despite the high elevations of the Greenland orography the simulated gravity wave is not a mountain wave. Analyses of the horizontal wind divergence, of the background wind profiles, of backward gravity wave ray-tracing trajectories, of HRM experiments with reduced Greenland topography and of several instability diagnostics near the tropopause level provide consistent evidence that the wave is emitted by the geostrophic adjustment of a jet instability associated with an intense, rapidly evolving, anticyclonically curved jet stream. In order to evaluate the potential frequency of such non-orographic polar stratospheric cloud events, an approximate jet instability diagnostic is performed for the winter 1999/2000. It indicates that ice-PSCs are only occasionally generated by gravity waves emanating from an unstable jet. |
author2 |
Institute for Atmospheric and Climate Science Zürich (IAC) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) NASA NASA Ames Research Center (ARC) |
format |
Article in Journal/Newspaper |
author |
Buss, S. Hertzog, A. Hostettler, C. Bui, T. P. Lüthi, T. Wernli, H. |
author_facet |
Buss, S. Hertzog, A. Hostettler, C. Bui, T. P. Lüthi, T. Wernli, H. |
author_sort |
Buss, S. |
title |
Analysis of a jet stream induced gravity wave associated with an observed ice cloud over Greenland |
title_short |
Analysis of a jet stream induced gravity wave associated with an observed ice cloud over Greenland |
title_full |
Analysis of a jet stream induced gravity wave associated with an observed ice cloud over Greenland |
title_fullStr |
Analysis of a jet stream induced gravity wave associated with an observed ice cloud over Greenland |
title_full_unstemmed |
Analysis of a jet stream induced gravity wave associated with an observed ice cloud over Greenland |
title_sort |
analysis of a jet stream induced gravity wave associated with an observed ice cloud over greenland |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://hal.science/hal-00327900 https://hal.science/hal-00327900/document https://hal.science/hal-00327900/file/acpd-3-5875-2003.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00327900 Atmospheric Chemistry and Physics Discussions, 2003, 3 (6), pp.5875-5918 |
op_relation |
hal-00327900 https://hal.science/hal-00327900 https://hal.science/hal-00327900/document https://hal.science/hal-00327900/file/acpd-3-5875-2003.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1801376082405883904 |