Stable boundary‐layer regimes at Dome C, Antarctica: observation and analysis
Investigation of meteorological measurements along a 45 m tower at Dome C on the high East Antarctic Plateau revealed two distinct stable boundary layer (SBL) regimes at this location. The first regime is characterized by strong winds and continuous turbulence. It results in full vertical coupling o...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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Online Access: | http://dx.doi.org/10.1002/qj.2998 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.2998 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.2998 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.2998 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.2998 |
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crwiley:10.1002/qj.2998 2024-10-13T14:01:49+00:00 Stable boundary‐layer regimes at Dome C, Antarctica: observation and analysis Vignon, Etienne van de Wiel, Bas J. H. van Hooijdonk, Ivo G. S. Genthon, Christophe van der Linden, Steven J. A. van Hooft, J. Antoon Baas, Peter Maurel, William Traullé, Olivier Casasanta, Giampietro ERC-Consolidator INSU GABLS4 OSUG 2017 http://dx.doi.org/10.1002/qj.2998 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.2998 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.2998 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.2998 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.2998 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 143, issue 704, page 1241-1253 ISSN 0035-9009 1477-870X journal-article 2017 crwiley https://doi.org/10.1002/qj.2998 2024-09-17T04:49:59Z Investigation of meteorological measurements along a 45 m tower at Dome C on the high East Antarctic Plateau revealed two distinct stable boundary layer (SBL) regimes at this location. The first regime is characterized by strong winds and continuous turbulence. It results in full vertical coupling of temperature, wind magnitude and wind direction in the SBL. The second regime is characterized by weak winds, associated with weak turbulent activity and very strong temperature inversions reaching up to 25 K in the lowest 10 m. Vertical temperature profiles are generally exponentially shaped (convex) in the first regime and ‘convex–concave–convex’ in the second. The transition between the two regimes is particularly abrupt when looking at the near‐surface temperature inversion and it can be identified by a 10 m wind‐speed threshold. With winds under this threshold, the turbulent heat supply toward the surface becomes significantly lower than the net surface radiative cooling. The threshold value (including its range of uncertainty) appears to agree with recent theoretical predictions from the so‐called ‘minimum wind speed for sustainable turbulence’ (MWST) theory. For the quasi‐steady, clear‐sky winter cases, the relation between the near‐surface inversion amplitude and the wind speed takes a characteristic ‘S’ shape. Closer analysis suggests that this relation corresponds to a ‘critical transition’ between a steady turbulent and a steady ‘radiative’ regime, with a dynamically unstable branch in the transition zone. These fascinating characteristics of the Antarctic boundary layer challenge present and future numerical models to represent this region in a physically correct manner. Article in Journal/Newspaper Antarc* Antarctic Antarctica Wiley Online Library Antarctic The Antarctic Quarterly Journal of the Royal Meteorological Society 143 704 1241 1253 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Investigation of meteorological measurements along a 45 m tower at Dome C on the high East Antarctic Plateau revealed two distinct stable boundary layer (SBL) regimes at this location. The first regime is characterized by strong winds and continuous turbulence. It results in full vertical coupling of temperature, wind magnitude and wind direction in the SBL. The second regime is characterized by weak winds, associated with weak turbulent activity and very strong temperature inversions reaching up to 25 K in the lowest 10 m. Vertical temperature profiles are generally exponentially shaped (convex) in the first regime and ‘convex–concave–convex’ in the second. The transition between the two regimes is particularly abrupt when looking at the near‐surface temperature inversion and it can be identified by a 10 m wind‐speed threshold. With winds under this threshold, the turbulent heat supply toward the surface becomes significantly lower than the net surface radiative cooling. The threshold value (including its range of uncertainty) appears to agree with recent theoretical predictions from the so‐called ‘minimum wind speed for sustainable turbulence’ (MWST) theory. For the quasi‐steady, clear‐sky winter cases, the relation between the near‐surface inversion amplitude and the wind speed takes a characteristic ‘S’ shape. Closer analysis suggests that this relation corresponds to a ‘critical transition’ between a steady turbulent and a steady ‘radiative’ regime, with a dynamically unstable branch in the transition zone. These fascinating characteristics of the Antarctic boundary layer challenge present and future numerical models to represent this region in a physically correct manner. |
author2 |
ERC-Consolidator INSU GABLS4 OSUG |
format |
Article in Journal/Newspaper |
author |
Vignon, Etienne van de Wiel, Bas J. H. van Hooijdonk, Ivo G. S. Genthon, Christophe van der Linden, Steven J. A. van Hooft, J. Antoon Baas, Peter Maurel, William Traullé, Olivier Casasanta, Giampietro |
spellingShingle |
Vignon, Etienne van de Wiel, Bas J. H. van Hooijdonk, Ivo G. S. Genthon, Christophe van der Linden, Steven J. A. van Hooft, J. Antoon Baas, Peter Maurel, William Traullé, Olivier Casasanta, Giampietro Stable boundary‐layer regimes at Dome C, Antarctica: observation and analysis |
author_facet |
Vignon, Etienne van de Wiel, Bas J. H. van Hooijdonk, Ivo G. S. Genthon, Christophe van der Linden, Steven J. A. van Hooft, J. Antoon Baas, Peter Maurel, William Traullé, Olivier Casasanta, Giampietro |
author_sort |
Vignon, Etienne |
title |
Stable boundary‐layer regimes at Dome C, Antarctica: observation and analysis |
title_short |
Stable boundary‐layer regimes at Dome C, Antarctica: observation and analysis |
title_full |
Stable boundary‐layer regimes at Dome C, Antarctica: observation and analysis |
title_fullStr |
Stable boundary‐layer regimes at Dome C, Antarctica: observation and analysis |
title_full_unstemmed |
Stable boundary‐layer regimes at Dome C, Antarctica: observation and analysis |
title_sort |
stable boundary‐layer regimes at dome c, antarctica: observation and analysis |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/qj.2998 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.2998 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.2998 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.2998 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.2998 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 143, issue 704, page 1241-1253 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.2998 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
143 |
container_issue |
704 |
container_start_page |
1241 |
op_container_end_page |
1253 |
_version_ |
1812813036686147584 |