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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Autores principales: Kaifler, N., Kaifler, B., Dörnbrack, A., Rapp, M., Hormaechea, José Luis, Torre, A. de la
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Geofísica
Ciencias Astronómicas
Gravity waves
Polar vortex
Measurement
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/107735
http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC7471968&blobtype=pdf
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-107735
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
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.
format Articulo
Articulo
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
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