Transitions in the wintertime near‐surface temperature inversion at Dome C, Antarctica
In this work we study the dynamics of the surface‐based temperature inversion over the Antarctic Plateau during the polar winter. Using 6 years of observations from the French–Italian Antarctic station Concordia at Dome C, we investigate sudden regime transitions in the strength of the near‐surface...
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ftpubmed:oai:pubmedcentral.nih.gov:6487950 2023-05-15T13:38:05+02:00 Transitions in the wintertime near‐surface temperature inversion at Dome C, Antarctica Baas, Peter van de Wiel, Bas J. H. van Meijgaard, Erik Vignon, Etienne Genthon, Christophe van der Linden, Steven J. A. de Roode, Stephan R. 2019-03-08 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6487950/ https://doi.org/10.1002/qj.3450 en eng John Wiley & Sons, Ltd http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6487950/ http://dx.doi.org/10.1002/qj.3450 © 2018 The Authors. Quarterly Journal of the Royal Meteorological Society published by John Wiley & Sons Ltd on behalf of the Royal Meteorological Society. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Research Articles Text 2019 ftpubmed https://doi.org/10.1002/qj.3450 2019-05-12T00:15:45Z In this work we study the dynamics of the surface‐based temperature inversion over the Antarctic Plateau during the polar winter. Using 6 years of observations from the French–Italian Antarctic station Concordia at Dome C, we investigate sudden regime transitions in the strength of the near‐surface temperature inversion. Here we define “near‐surface” as being within the domain of the 45‐m measuring tower. In particular, we consider the strongly nonlinear relation between the 10‐m inversion strength (T (10m) – T (s)) and the 10‐m wind speed. To this end, all individual events for which the 10‐m inversion strength increases or decreases continuously by more than 15 K in time are considered. Composite time series and vertical profiles of wind and temperature reveal specific characteristics of the transition from weak to very strong inversions and vice versa. In contrast to midlatitudes, the largest variations in temperature are not found at the surface but at a height of 10 m. A similar analysis was performed on results from an atmospheric single‐column model (SCM). Overall, the SCM results reproduce the observed characteristics of the transitions in the near‐surface inversion remarkably well. Using model output, the underlying mechanisms of the regime transitions are identified. The nonlinear relation between inversion strength and wind speed at a given level is explained by variations in the geostrophic wind speed, changes in the depth of the turbulent layer and the vertical divergence of turbulent fluxes. Moreover, the transitions between different boundary layer regimes cannot be explained without considering the contribution of subsidence heating. Text Antarc* Antarctic Antarctica PubMed Central (PMC) Antarctic The Antarctic Quarterly Journal of the Royal Meteorological Society 145 720 930 946 |
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Research Articles |
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Research Articles Baas, Peter van de Wiel, Bas J. H. van Meijgaard, Erik Vignon, Etienne Genthon, Christophe van der Linden, Steven J. A. de Roode, Stephan R. Transitions in the wintertime near‐surface temperature inversion at Dome C, Antarctica |
topic_facet |
Research Articles |
description |
In this work we study the dynamics of the surface‐based temperature inversion over the Antarctic Plateau during the polar winter. Using 6 years of observations from the French–Italian Antarctic station Concordia at Dome C, we investigate sudden regime transitions in the strength of the near‐surface temperature inversion. Here we define “near‐surface” as being within the domain of the 45‐m measuring tower. In particular, we consider the strongly nonlinear relation between the 10‐m inversion strength (T (10m) – T (s)) and the 10‐m wind speed. To this end, all individual events for which the 10‐m inversion strength increases or decreases continuously by more than 15 K in time are considered. Composite time series and vertical profiles of wind and temperature reveal specific characteristics of the transition from weak to very strong inversions and vice versa. In contrast to midlatitudes, the largest variations in temperature are not found at the surface but at a height of 10 m. A similar analysis was performed on results from an atmospheric single‐column model (SCM). Overall, the SCM results reproduce the observed characteristics of the transitions in the near‐surface inversion remarkably well. Using model output, the underlying mechanisms of the regime transitions are identified. The nonlinear relation between inversion strength and wind speed at a given level is explained by variations in the geostrophic wind speed, changes in the depth of the turbulent layer and the vertical divergence of turbulent fluxes. Moreover, the transitions between different boundary layer regimes cannot be explained without considering the contribution of subsidence heating. |
format |
Text |
author |
Baas, Peter van de Wiel, Bas J. H. van Meijgaard, Erik Vignon, Etienne Genthon, Christophe van der Linden, Steven J. A. de Roode, Stephan R. |
author_facet |
Baas, Peter van de Wiel, Bas J. H. van Meijgaard, Erik Vignon, Etienne Genthon, Christophe van der Linden, Steven J. A. de Roode, Stephan R. |
author_sort |
Baas, Peter |
title |
Transitions in the wintertime near‐surface temperature inversion at Dome C, Antarctica |
title_short |
Transitions in the wintertime near‐surface temperature inversion at Dome C, Antarctica |
title_full |
Transitions in the wintertime near‐surface temperature inversion at Dome C, Antarctica |
title_fullStr |
Transitions in the wintertime near‐surface temperature inversion at Dome C, Antarctica |
title_full_unstemmed |
Transitions in the wintertime near‐surface temperature inversion at Dome C, Antarctica |
title_sort |
transitions in the wintertime near‐surface temperature inversion at dome c, antarctica |
publisher |
John Wiley & Sons, Ltd |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6487950/ https://doi.org/10.1002/qj.3450 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6487950/ http://dx.doi.org/10.1002/qj.3450 |
op_rights |
© 2018 The Authors. Quarterly Journal of the Royal Meteorological Society published by John Wiley & Sons Ltd on behalf of the Royal Meteorological Society. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/qj.3450 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
145 |
container_issue |
720 |
container_start_page |
930 |
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946 |
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1766101355007574016 |