Observations of near-surface wind and temperature structures and their variations with topography and latitude in East Antarctica
The first multiyear surface meteorological observations over Dome A, the highest ice feature in the entire Antarctica continent, are analyzed to understand the surface wind, temperature, and stability climatology over Dome A and how it differs from the surface climatology at two lower-latitude/lower...
Published in: | Journal of Geophysical Research |
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-292 https://doi.org/10.1029/2008JD011611 |
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ftncar:oai:drupal-site.org:articles_15202 2023-09-05T13:13:22+02:00 Observations of near-surface wind and temperature structures and their variations with topography and latitude in East Antarctica Zhou, Mingyu (author) Zhang, Zhanhai (author) Lenschow, Donald (author) Hsu, Hsiao-ming (author) Sun, Bo (author) Gao, Zhiqiu (author) Li, Shiming (author) Bian, Xindi (author) Yu, Lejiang (author) 2009-09-15 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-292 https://doi.org/10.1029/2008JD011611 en eng Journal of Geophysical Research-Atmospheres http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-292 doi:10.1029/2008JD011611 ark:/85065/d79g5nvq An edited version of this paper was published by AGU. Copyright 2009 American Geophysical Union. Text article 2009 ftncar https://doi.org/10.1029/2008JD011611 2023-08-14T18:41:55Z The first multiyear surface meteorological observations over Dome A, the highest ice feature in the entire Antarctica continent, are analyzed to understand the surface wind, temperature, and stability climatology over Dome A and how it differs from the surface climatology at two lower-latitude/lower-elevation sites along similar longitude in East Antarctica. The climatology is also compared with that over Dome C. In contrast to the surface winds at lower sites, where moderate to strong northeasterly winds prevail with a distinct diurnal oscillation in wind speed in response to the diurnal change in katabatic forcing, summertime surface winds over Dome A are very weak, are variable in direction, and show little diurnal variation. Although both temperature and temperature gradient oscillate diurnally, the gradient over Dome A remained positive all day long, indicating a persistent surface inversion, while at the two lower sites, as well as over Dome C, sufficient insolation leads to the breakup of inversion and the development of a convective boundary layer in the afternoon. Wavelet analysis of near-surface stability revealed that besides the strong diurnal signal, the near-surface stability also exhibits annual, semiannual, and interseasonal (period ~50 days) oscillations at all locations. These oscillations in near-surface stability are linked to the same peaks in the 500-hPa geopotential height spectra and therefore are believed to be caused by variations of synoptic conditions. Article in Journal/Newspaper Antarc* Antarctica East Antarctica OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) East Antarctica Journal of Geophysical Research 114 D17 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The first multiyear surface meteorological observations over Dome A, the highest ice feature in the entire Antarctica continent, are analyzed to understand the surface wind, temperature, and stability climatology over Dome A and how it differs from the surface climatology at two lower-latitude/lower-elevation sites along similar longitude in East Antarctica. The climatology is also compared with that over Dome C. In contrast to the surface winds at lower sites, where moderate to strong northeasterly winds prevail with a distinct diurnal oscillation in wind speed in response to the diurnal change in katabatic forcing, summertime surface winds over Dome A are very weak, are variable in direction, and show little diurnal variation. Although both temperature and temperature gradient oscillate diurnally, the gradient over Dome A remained positive all day long, indicating a persistent surface inversion, while at the two lower sites, as well as over Dome C, sufficient insolation leads to the breakup of inversion and the development of a convective boundary layer in the afternoon. Wavelet analysis of near-surface stability revealed that besides the strong diurnal signal, the near-surface stability also exhibits annual, semiannual, and interseasonal (period ~50 days) oscillations at all locations. These oscillations in near-surface stability are linked to the same peaks in the 500-hPa geopotential height spectra and therefore are believed to be caused by variations of synoptic conditions. |
author2 |
Zhou, Mingyu (author) Zhang, Zhanhai (author) Lenschow, Donald (author) Hsu, Hsiao-ming (author) Sun, Bo (author) Gao, Zhiqiu (author) Li, Shiming (author) Bian, Xindi (author) Yu, Lejiang (author) |
format |
Article in Journal/Newspaper |
title |
Observations of near-surface wind and temperature structures and their variations with topography and latitude in East Antarctica |
spellingShingle |
Observations of near-surface wind and temperature structures and their variations with topography and latitude in East Antarctica |
title_short |
Observations of near-surface wind and temperature structures and their variations with topography and latitude in East Antarctica |
title_full |
Observations of near-surface wind and temperature structures and their variations with topography and latitude in East Antarctica |
title_fullStr |
Observations of near-surface wind and temperature structures and their variations with topography and latitude in East Antarctica |
title_full_unstemmed |
Observations of near-surface wind and temperature structures and their variations with topography and latitude in East Antarctica |
title_sort |
observations of near-surface wind and temperature structures and their variations with topography and latitude in east antarctica |
publishDate |
2009 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-292 https://doi.org/10.1029/2008JD011611 |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_relation |
Journal of Geophysical Research-Atmospheres http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-000-292 doi:10.1029/2008JD011611 ark:/85065/d79g5nvq |
op_rights |
An edited version of this paper was published by AGU. Copyright 2009 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2008JD011611 |
container_title |
Journal of Geophysical Research |
container_volume |
114 |
container_issue |
D17 |
_version_ |
1776204668430450688 |