Impact of upper-level jet-generated inertia-gravity waves on surface wind and precipitation
International audience A meteorological case study for the impact of inertia-gravity waves on surface meteorology is presented. The large-scale environment from 17 to 19 December 1999 was dominated by a poleward breaking Rossby wave transporting subtropical air over the North Atlantic Ocean upward a...
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ftccsdartic:oai:HAL:hal-00303172v1 2023-11-12T04:22:43+01:00 Impact of upper-level jet-generated inertia-gravity waves on surface wind and precipitation Zülicke, C. Peters, D. H. W. Leibniz-Institute of Atmospheric Physics (AIP) 2007-11-13 https://hal.science/hal-00303172 https://hal.science/hal-00303172/document https://hal.science/hal-00303172/file/acpd-7-15873-2007.pdf en eng HAL CCSD European Geosciences Union hal-00303172 https://hal.science/hal-00303172 https://hal.science/hal-00303172/document https://hal.science/hal-00303172/file/acpd-7-15873-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00303172 Atmospheric Chemistry and Physics Discussions, 2007, 7 (6), pp.15873-15909 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2007 ftccsdartic 2023-10-21T23:11:40Z International audience A meteorological case study for the impact of inertia-gravity waves on surface meteorology is presented. The large-scale environment from 17 to 19 December 1999 was dominated by a poleward breaking Rossby wave transporting subtropical air over the North Atlantic Ocean upward and north-eastward. The synoptic situation was characterized with an upper tropospheric jet streak passing Northern Europe. The unbalanced jet spontaneously radiated inertia-gravity waves from its exit region. Near-inertial waves appeared with a horizontal wavelength of about 200 km and an apparent period of about 12 h. These waves transported energy downwards and interacted with large-scale convection. This configuration is simulated with the nonhydrostatic Fifth-Generation Mesoscale Model. Together with simplified runs without orography and moisture it is demonstrated that the imbalance of the jet (detected with the cross-stream ageostrophic wind) and the deep convection (quantified with the latent heat release) are forcing inertia-gravity waves. This interaction is especially pronounced when the upper tropospheric jet is located above a cold front at the surface and supports deep frontal convection. Weak indication was found for triggering post-frontal convection by inertia-gravity waves. The realism of model simulations was studied in an extended validation study for the Baltic Sea region. It included observations from radar (DWDPI, BALTRAD), satellite (GFZGPS), weather stations (DWDMI) and assimilated products (ELDAS, MESAN). The detected spatio-temporal patterns show wind pulsations and precipitation events at scales corresponding to those of inertia-gravity waves. In particular, the robust features of strong wind and enhanced precipitation near the front appeared with nearly the same amplitudes as in the model. In some datasets we found indication for periodic variations in the post-frontal region. These findings demonstrate the impact of upper tropospheric jet-generated inertia-gravity waves on the dynamics ... Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Zülicke, C. Peters, D. H. W. Impact of upper-level jet-generated inertia-gravity waves on surface wind and precipitation |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience A meteorological case study for the impact of inertia-gravity waves on surface meteorology is presented. The large-scale environment from 17 to 19 December 1999 was dominated by a poleward breaking Rossby wave transporting subtropical air over the North Atlantic Ocean upward and north-eastward. The synoptic situation was characterized with an upper tropospheric jet streak passing Northern Europe. The unbalanced jet spontaneously radiated inertia-gravity waves from its exit region. Near-inertial waves appeared with a horizontal wavelength of about 200 km and an apparent period of about 12 h. These waves transported energy downwards and interacted with large-scale convection. This configuration is simulated with the nonhydrostatic Fifth-Generation Mesoscale Model. Together with simplified runs without orography and moisture it is demonstrated that the imbalance of the jet (detected with the cross-stream ageostrophic wind) and the deep convection (quantified with the latent heat release) are forcing inertia-gravity waves. This interaction is especially pronounced when the upper tropospheric jet is located above a cold front at the surface and supports deep frontal convection. Weak indication was found for triggering post-frontal convection by inertia-gravity waves. The realism of model simulations was studied in an extended validation study for the Baltic Sea region. It included observations from radar (DWDPI, BALTRAD), satellite (GFZGPS), weather stations (DWDMI) and assimilated products (ELDAS, MESAN). The detected spatio-temporal patterns show wind pulsations and precipitation events at scales corresponding to those of inertia-gravity waves. In particular, the robust features of strong wind and enhanced precipitation near the front appeared with nearly the same amplitudes as in the model. In some datasets we found indication for periodic variations in the post-frontal region. These findings demonstrate the impact of upper tropospheric jet-generated inertia-gravity waves on the dynamics ... |
author2 |
Leibniz-Institute of Atmospheric Physics (AIP) |
format |
Article in Journal/Newspaper |
author |
Zülicke, C. Peters, D. H. W. |
author_facet |
Zülicke, C. Peters, D. H. W. |
author_sort |
Zülicke, C. |
title |
Impact of upper-level jet-generated inertia-gravity waves on surface wind and precipitation |
title_short |
Impact of upper-level jet-generated inertia-gravity waves on surface wind and precipitation |
title_full |
Impact of upper-level jet-generated inertia-gravity waves on surface wind and precipitation |
title_fullStr |
Impact of upper-level jet-generated inertia-gravity waves on surface wind and precipitation |
title_full_unstemmed |
Impact of upper-level jet-generated inertia-gravity waves on surface wind and precipitation |
title_sort |
impact of upper-level jet-generated inertia-gravity waves on surface wind and precipitation |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00303172 https://hal.science/hal-00303172/document https://hal.science/hal-00303172/file/acpd-7-15873-2007.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00303172 Atmospheric Chemistry and Physics Discussions, 2007, 7 (6), pp.15873-15909 |
op_relation |
hal-00303172 https://hal.science/hal-00303172 https://hal.science/hal-00303172/document https://hal.science/hal-00303172/file/acpd-7-15873-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782337665775960064 |