Influence of cyclonic perturbations on surface winds around Dumont d'Urville, East Antarctica, using wavelet transform
Wavelet analyses of the surface winds at Dumont d'Urville, an East Antarctic station, have been performed for the months April, June, September, and December 1993, representing autumn, winter, spring, and summer, respectively. The 3 hourly 10 min averaged meteorological station data have been u...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | http://hdl.handle.net/2078.1/42569 https://doi.org/10.1029/2001JD900123 |
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ftunivlouvain:oai:dial.uclouvain.be:boreal:42569 2024-05-12T07:53:20+00:00 Influence of cyclonic perturbations on surface winds around Dumont d'Urville, East Antarctica, using wavelet transform Naithani, Jaya Mastrantonio, G Argentini, S Pettre, P UCL - SC/PHYS - Département de physique 2001 http://hdl.handle.net/2078.1/42569 https://doi.org/10.1029/2001JD900123 eng eng Amer Geophysical Union boreal:42569 http://hdl.handle.net/2078.1/42569 doi:10.1029/2001JD900123 urn:ISSN:0747-7309 Journal Of Geophysical Research-atmospheres, Vol. 106, no. D15, p. 17093-17102 (2001) info:eu-repo/semantics/article 2001 ftunivlouvain https://doi.org/10.1029/2001JD900123 2024-04-17T17:31:57Z Wavelet analyses of the surface winds at Dumont d'Urville, an East Antarctic station, have been performed for the months April, June, September, and December 1993, representing autumn, winter, spring, and summer, respectively. The 3 hourly 10 min averaged meteorological station data have been used. The site is characterized by intense katabatic winds that arrive from the southeast. During the year 1993 the maximum occurrence of wind was from 160 degrees direction sector. The wavelet transform spectra of horizontal wind show prominent periodicities in the interval between 2 and 20 days. The spectral energies in the diurnal scale are comparatively very low even in summer. A comparison with wavelet spectra of pressure for synoptic scale (2-10 days) confirms the influence of synoptic disturbances that are frequent in coastal regions of the Antarctic continent. The same analysis carried out on the wind components, parallel and transverse to the main katabatic flow direction, reveals that these periodicities are mainly due to the katabatic flow behavior. Although the katabatic wind flow is the dominant force characterizing the day-to-day weather conditions, the influence of transient cyclones offshore cannot be ignored; in situations of considerable synoptic activity the intensity and duration of katabatic wind flow are prolonged. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica DIAL@UCLouvain (Université catholique de Louvain) Antarctic Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) East Antarctica The Antarctic Journal of Geophysical Research: Atmospheres 106 D15 17093 17102 |
institution |
Open Polar |
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DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
description |
Wavelet analyses of the surface winds at Dumont d'Urville, an East Antarctic station, have been performed for the months April, June, September, and December 1993, representing autumn, winter, spring, and summer, respectively. The 3 hourly 10 min averaged meteorological station data have been used. The site is characterized by intense katabatic winds that arrive from the southeast. During the year 1993 the maximum occurrence of wind was from 160 degrees direction sector. The wavelet transform spectra of horizontal wind show prominent periodicities in the interval between 2 and 20 days. The spectral energies in the diurnal scale are comparatively very low even in summer. A comparison with wavelet spectra of pressure for synoptic scale (2-10 days) confirms the influence of synoptic disturbances that are frequent in coastal regions of the Antarctic continent. The same analysis carried out on the wind components, parallel and transverse to the main katabatic flow direction, reveals that these periodicities are mainly due to the katabatic flow behavior. Although the katabatic wind flow is the dominant force characterizing the day-to-day weather conditions, the influence of transient cyclones offshore cannot be ignored; in situations of considerable synoptic activity the intensity and duration of katabatic wind flow are prolonged. |
author2 |
UCL - SC/PHYS - Département de physique |
format |
Article in Journal/Newspaper |
author |
Naithani, Jaya Mastrantonio, G Argentini, S Pettre, P |
spellingShingle |
Naithani, Jaya Mastrantonio, G Argentini, S Pettre, P Influence of cyclonic perturbations on surface winds around Dumont d'Urville, East Antarctica, using wavelet transform |
author_facet |
Naithani, Jaya Mastrantonio, G Argentini, S Pettre, P |
author_sort |
Naithani, Jaya |
title |
Influence of cyclonic perturbations on surface winds around Dumont d'Urville, East Antarctica, using wavelet transform |
title_short |
Influence of cyclonic perturbations on surface winds around Dumont d'Urville, East Antarctica, using wavelet transform |
title_full |
Influence of cyclonic perturbations on surface winds around Dumont d'Urville, East Antarctica, using wavelet transform |
title_fullStr |
Influence of cyclonic perturbations on surface winds around Dumont d'Urville, East Antarctica, using wavelet transform |
title_full_unstemmed |
Influence of cyclonic perturbations on surface winds around Dumont d'Urville, East Antarctica, using wavelet transform |
title_sort |
influence of cyclonic perturbations on surface winds around dumont d'urville, east antarctica, using wavelet transform |
publisher |
Amer Geophysical Union |
publishDate |
2001 |
url |
http://hdl.handle.net/2078.1/42569 https://doi.org/10.1029/2001JD900123 |
long_lat |
ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(140.013,140.013,-66.667,-66.667) |
geographic |
Antarctic Dumont d'Urville Dumont-d'Urville East Antarctica The Antarctic |
geographic_facet |
Antarctic Dumont d'Urville Dumont-d'Urville East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
Journal Of Geophysical Research-atmospheres, Vol. 106, no. D15, p. 17093-17102 (2001) |
op_relation |
boreal:42569 http://hdl.handle.net/2078.1/42569 doi:10.1029/2001JD900123 urn:ISSN:0747-7309 |
op_doi |
https://doi.org/10.1029/2001JD900123 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
106 |
container_issue |
D15 |
container_start_page |
17093 |
op_container_end_page |
17102 |
_version_ |
1798842218848452608 |