Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina
Large-amplitude internal gravity waves were observed using Rayleigh lidar temperature soundings above Rio Grande, Argentina (54◦ S, 68◦ W), in the period 16–23 June 2018.Temperature perturbations in the upper stratosphere amounted to 80 K peak-to-peak and potential energy densities exceeded 400 J/kg...
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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/107735 2023-05-15T18:02:15+02:00 Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina Kaifler, N. Kaifler, B. Dörnbrack, A. Rapp, M. Hormaechea, José Luis Torre, A. de la 2020 application/pdf http://sedici.unlp.edu.ar/handle/10915/107735 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC7471968&blobtype=pdf en eng http://sedici.unlp.edu.ar/handle/10915/107735 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC7471968&blobtype=pdf issn:2045-2322 http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) CC-BY Geofísica Ciencias Astronómicas Gravity waves Polar vortex Measurement Articulo 2020 ftunivlaplata 2021-11-28T01:06:21Z Large-amplitude internal gravity waves were observed using Rayleigh lidar temperature soundings above Rio Grande, Argentina (54◦ S, 68◦ W), in the period 16–23 June 2018.Temperature perturbations in the upper stratosphere amounted to 80 K peak-to-peak and potential energy densities exceeded 400 J/kg.The measured amplitudes and phase alignments agree well with operational analyses and short-term forecasts of the Integrated Forecasting System (IFS) of the European Centre for Medium-Range Weather Forecasts (ECMWF), implying that these quasi-steady gravity waves resulted from the airfow across theAndes.We estimate gravity wave momentum fuxes larger than 100 mPa applying independent methods to both lidar data and IFS model data. These mountain waves deposited momentum at the inner edge of the polar night jet and led to a long-lasting deceleration of the stratospheric fow.The accumulated mountain wave drag afected the stratospheric circulation several thousand kilometers downstream. In the 2018 austral winter, mountain wave events of this magnitude contributed more than 30% of the total potential energy density, signifying their importance by perturbing the stratospheric polar vortex. Facultad de Ciencias Astronómicas y Geofísicas Article in Journal/Newspaper polar night Tierra del Fuego Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) Argentina Austral |
institution |
Open Polar |
collection |
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) |
op_collection_id |
ftunivlaplata |
language |
English |
topic |
Geofísica Ciencias Astronómicas Gravity waves Polar vortex Measurement |
spellingShingle |
Geofísica Ciencias Astronómicas Gravity waves Polar vortex Measurement Kaifler, N. Kaifler, B. Dörnbrack, A. Rapp, M. Hormaechea, José Luis Torre, A. de la Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina |
topic_facet |
Geofísica Ciencias Astronómicas Gravity waves Polar vortex Measurement |
description |
Large-amplitude internal gravity waves were observed using Rayleigh lidar temperature soundings above Rio Grande, Argentina (54◦ S, 68◦ W), in the period 16–23 June 2018.Temperature perturbations in the upper stratosphere amounted to 80 K peak-to-peak and potential energy densities exceeded 400 J/kg.The measured amplitudes and phase alignments agree well with operational analyses and short-term forecasts of the Integrated Forecasting System (IFS) of the European Centre for Medium-Range Weather Forecasts (ECMWF), implying that these quasi-steady gravity waves resulted from the airfow across theAndes.We estimate gravity wave momentum fuxes larger than 100 mPa applying independent methods to both lidar data and IFS model data. These mountain waves deposited momentum at the inner edge of the polar night jet and led to a long-lasting deceleration of the stratospheric fow.The accumulated mountain wave drag afected the stratospheric circulation several thousand kilometers downstream. In the 2018 austral winter, mountain wave events of this magnitude contributed more than 30% of the total potential energy density, signifying their importance by perturbing the stratospheric polar vortex. Facultad de Ciencias Astronómicas y Geofísicas |
format |
Article in Journal/Newspaper |
author |
Kaifler, N. Kaifler, B. Dörnbrack, A. Rapp, M. Hormaechea, José Luis Torre, A. de la |
author_facet |
Kaifler, N. Kaifler, B. Dörnbrack, A. Rapp, M. Hormaechea, José Luis Torre, A. de la |
author_sort |
Kaifler, N. |
title |
Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina |
title_short |
Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina |
title_full |
Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina |
title_fullStr |
Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina |
title_full_unstemmed |
Lidar observations of large-amplitude mountain waves in the stratosphere above Tierra del Fuego, Argentina |
title_sort |
lidar observations of large-amplitude mountain waves in the stratosphere above tierra del fuego, argentina |
publishDate |
2020 |
url |
http://sedici.unlp.edu.ar/handle/10915/107735 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC7471968&blobtype=pdf |
geographic |
Argentina Austral |
geographic_facet |
Argentina Austral |
genre |
polar night Tierra del Fuego |
genre_facet |
polar night Tierra del Fuego |
op_relation |
http://sedici.unlp.edu.ar/handle/10915/107735 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC7471968&blobtype=pdf issn:2045-2322 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
op_rightsnorm |
CC-BY |
_version_ |
1766172057987448832 |