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 |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2017
|
Subjects: | |
Online Access: | https://research.tue.nl/en/publications/6d6a1b5b-3379-4b88-9d02-0e076bd08301 https://doi.org/10.1002/qj.2998 http://www.scopus.com/inward/record.url?scp=85017117839&partnerID=8YFLogxK |
id |
ftuniveindcris:oai:pure.tue.nl:publications/6d6a1b5b-3379-4b88-9d02-0e076bd08301 |
---|---|
record_format |
openpolar |
spelling |
ftuniveindcris:oai:pure.tue.nl:publications/6d6a1b5b-3379-4b88-9d02-0e076bd08301 2024-06-23T07:47:29+00:00 Stable boundary-layer regimes at dome C, Antarctica : observation and analysis Vignon, E. van de Wiel, B.J.H. van Hooijdonk, I.G.S. Genthon, C. van der Linden, S.J.A. van Hooft, J.A. Baas, P. Maurel, W. Traullé, O. Casasanta, G. 2017-04 https://research.tue.nl/en/publications/6d6a1b5b-3379-4b88-9d02-0e076bd08301 https://doi.org/10.1002/qj.2998 http://www.scopus.com/inward/record.url?scp=85017117839&partnerID=8YFLogxK eng eng https://research.tue.nl/en/publications/6d6a1b5b-3379-4b88-9d02-0e076bd08301 info:eu-repo/semantics/closedAccess Vignon , E , van de Wiel , B J H , van Hooijdonk , I G S , Genthon , C , van der Linden , S J A , van Hooft , J A , Baas , P , Maurel , W , Traullé , O & Casasanta , G 2017 , ' Stable boundary-layer regimes at dome C, Antarctica : observation and analysis ' , Quarterly Journal of the Royal Meteorological Society , vol. 143 , no. 704 , 143 , pp. 1241-1253 . https://doi.org/10.1002/qj.2998 Antarctic atmosphere critical transition stable boundary layer wind-speed threshold article 2017 ftuniveindcris https://doi.org/10.1002/qj.2998 2024-05-29T23:59:37Z 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 Eindhoven University of Technology research portal Antarctic The Antarctic Quarterly Journal of the Royal Meteorological Society 143 704 1241 1253 |
institution |
Open Polar |
collection |
Eindhoven University of Technology research portal |
op_collection_id |
ftuniveindcris |
language |
English |
topic |
Antarctic atmosphere critical transition stable boundary layer wind-speed threshold |
spellingShingle |
Antarctic atmosphere critical transition stable boundary layer wind-speed threshold Vignon, E. van de Wiel, B.J.H. van Hooijdonk, I.G.S. Genthon, C. van der Linden, S.J.A. van Hooft, J.A. Baas, P. Maurel, W. Traullé, O. Casasanta, G. Stable boundary-layer regimes at dome C, Antarctica : observation and analysis |
topic_facet |
Antarctic atmosphere critical transition stable boundary layer wind-speed threshold |
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. |
format |
Article in Journal/Newspaper |
author |
Vignon, E. van de Wiel, B.J.H. van Hooijdonk, I.G.S. Genthon, C. van der Linden, S.J.A. van Hooft, J.A. Baas, P. Maurel, W. Traullé, O. Casasanta, G. |
author_facet |
Vignon, E. van de Wiel, B.J.H. van Hooijdonk, I.G.S. Genthon, C. van der Linden, S.J.A. van Hooft, J.A. Baas, P. Maurel, W. Traullé, O. Casasanta, G. |
author_sort |
Vignon, E. |
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 |
publishDate |
2017 |
url |
https://research.tue.nl/en/publications/6d6a1b5b-3379-4b88-9d02-0e076bd08301 https://doi.org/10.1002/qj.2998 http://www.scopus.com/inward/record.url?scp=85017117839&partnerID=8YFLogxK |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Vignon , E , van de Wiel , B J H , van Hooijdonk , I G S , Genthon , C , van der Linden , S J A , van Hooft , J A , Baas , P , Maurel , W , Traullé , O & Casasanta , G 2017 , ' Stable boundary-layer regimes at dome C, Antarctica : observation and analysis ' , Quarterly Journal of the Royal Meteorological Society , vol. 143 , no. 704 , 143 , pp. 1241-1253 . https://doi.org/10.1002/qj.2998 |
op_relation |
https://research.tue.nl/en/publications/6d6a1b5b-3379-4b88-9d02-0e076bd08301 |
op_rights |
info:eu-repo/semantics/closedAccess |
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_ |
1802651603821395968 |