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Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model. / Vignon, Etienne; Hourdin, Frédéric; Genthon, Christophe; Van de Wiel, Bas J.H.; Gallée, Hubert; Madeleine, Jean Baptiste; Beaumet, Julien.

In: Journal of Advances in Modeling Earth Systems, Vol. 10, No. 1, 01.01.2018, p. 98-125.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Vignon, E, Hourdin, F, Genthon, C, Van de Wiel, BJH, Gallée, H, Madeleine, JB & Beaumet, J 2018, 'Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model' Journal of Advances in Modeling Earth Systems, vol. 10, no. 1, pp. 98-125. https://doi.org/10.1002/2017MS001184

APA

Vignon, E., Hourdin, F., Genthon, C., Van de Wiel, B. J. H., Gallée, H., Madeleine, J. B., & Beaumet, J. (2018). Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model. Journal of Advances in Modeling Earth Systems, 10(1), 98-125. https://doi.org/10.1002/2017MS001184

Vancouver

Vignon E, Hourdin F, Genthon C, Van de Wiel BJH, Gallée H, Madeleine JB et al. Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model. Journal of Advances in Modeling Earth Systems. 2018 Jan 1;10(1):98-125. https://doi.org/10.1002/2017MS001184

Author

Vignon, Etienne ; Hourdin, Frédéric ; Genthon, Christophe ; Van de Wiel, Bas J.H. ; Gallée, Hubert ; Madeleine, Jean Baptiste ; Beaumet, Julien. / Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model. In: Journal of Advances in Modeling Earth Systems. 2018 ; Vol. 10, No. 1. pp. 98-125.

BibTeX

@article{57b88426cdc04c9883daec8622650109,
title = "Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model",
abstract = "Observations evidence extremely stable boundary layers (SBL) over the Antarctic Plateau and sharp regime transitions between weakly and very stable conditions. Representing such features is a challenge for climate models. This study assesses the modeling of the dynamics of the boundary layer over the Antarctic Plateau in the LMDZ general circulation model. It uses 1 year simulations with a stretched-grid over Dome C. The model is nudged with reanalyses outside of the Dome C region such as simulations can be directly compared to in situ observations. We underline the critical role of the downward longwave radiation for modeling the surface temperature. LMDZ reasonably represents the near-surface seasonal profiles of wind and temperature but strong temperature inversions are degraded by enhanced turbulent mixing formulations. Unlike ERA-Interim reanalyses, LMDZ reproduces two SBL regimes and the regime transition, with a sudden increase in the near-surface inversion with decreasing wind speed. The sharpness of the transition depends on the stability function used for calculating the surface drag coefficient. Moreover, using a refined vertical grid leads to a better reversed “S-shaped” relationship between the inversion and the wind. Sudden warming events associated to synoptic advections of warm and moist air are also well reproduced. Near-surface supersaturation with respect to ice is not allowed in LMDZ but the impact on the SBL structure is moderate. Finally, climate simulations with the free model show that the recommended configuration leads to stronger inversions and winds over the ice-sheet. However, the near-surface wind remains underestimated over the slopes of East-Antarctica.",
keywords = "Antarctic Plateau, boundary-layer, general circulation model, LMDZ, stable boundary-layer regimes",
author = "Etienne Vignon and Fr{\'e}d{\'e}ric Hourdin and Christophe Genthon and {Van de Wiel}, {Bas J.H.} and Hubert Gall{\'e}e and Madeleine, {Jean Baptiste} and Julien Beaumet",
year = "2018",
month = "1",
day = "1",
doi = "10.1002/2017MS001184",
language = "English",
volume = "10",
pages = "98--125",
journal = "Journal of Advances in Modeling Earth Systems",
issn = "1942-2466",
publisher = "American Geophysical Union",
number = "1",

}

RIS

TY - JOUR

T1 - Modeling the Dynamics of the Atmospheric Boundary Layer Over the Antarctic Plateau With a General Circulation Model

AU - Vignon, Etienne

AU - Hourdin, Frédéric

AU - Genthon, Christophe

AU - Van de Wiel, Bas J.H.

AU - Gallée, Hubert

AU - Madeleine, Jean Baptiste

AU - Beaumet, Julien

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Observations evidence extremely stable boundary layers (SBL) over the Antarctic Plateau and sharp regime transitions between weakly and very stable conditions. Representing such features is a challenge for climate models. This study assesses the modeling of the dynamics of the boundary layer over the Antarctic Plateau in the LMDZ general circulation model. It uses 1 year simulations with a stretched-grid over Dome C. The model is nudged with reanalyses outside of the Dome C region such as simulations can be directly compared to in situ observations. We underline the critical role of the downward longwave radiation for modeling the surface temperature. LMDZ reasonably represents the near-surface seasonal profiles of wind and temperature but strong temperature inversions are degraded by enhanced turbulent mixing formulations. Unlike ERA-Interim reanalyses, LMDZ reproduces two SBL regimes and the regime transition, with a sudden increase in the near-surface inversion with decreasing wind speed. The sharpness of the transition depends on the stability function used for calculating the surface drag coefficient. Moreover, using a refined vertical grid leads to a better reversed “S-shaped” relationship between the inversion and the wind. Sudden warming events associated to synoptic advections of warm and moist air are also well reproduced. Near-surface supersaturation with respect to ice is not allowed in LMDZ but the impact on the SBL structure is moderate. Finally, climate simulations with the free model show that the recommended configuration leads to stronger inversions and winds over the ice-sheet. However, the near-surface wind remains underestimated over the slopes of East-Antarctica.

AB - Observations evidence extremely stable boundary layers (SBL) over the Antarctic Plateau and sharp regime transitions between weakly and very stable conditions. Representing such features is a challenge for climate models. This study assesses the modeling of the dynamics of the boundary layer over the Antarctic Plateau in the LMDZ general circulation model. It uses 1 year simulations with a stretched-grid over Dome C. The model is nudged with reanalyses outside of the Dome C region such as simulations can be directly compared to in situ observations. We underline the critical role of the downward longwave radiation for modeling the surface temperature. LMDZ reasonably represents the near-surface seasonal profiles of wind and temperature but strong temperature inversions are degraded by enhanced turbulent mixing formulations. Unlike ERA-Interim reanalyses, LMDZ reproduces two SBL regimes and the regime transition, with a sudden increase in the near-surface inversion with decreasing wind speed. The sharpness of the transition depends on the stability function used for calculating the surface drag coefficient. Moreover, using a refined vertical grid leads to a better reversed “S-shaped” relationship between the inversion and the wind. Sudden warming events associated to synoptic advections of warm and moist air are also well reproduced. Near-surface supersaturation with respect to ice is not allowed in LMDZ but the impact on the SBL structure is moderate. Finally, climate simulations with the free model show that the recommended configuration leads to stronger inversions and winds over the ice-sheet. However, the near-surface wind remains underestimated over the slopes of East-Antarctica.

KW - Antarctic Plateau

KW - boundary-layer

KW - general circulation model

KW - LMDZ

KW - stable boundary-layer regimes

UR - http://www.scopus.com/inward/record.url?scp=85040689687&partnerID=8YFLogxK

UR - http://resolver.tudelft.nl/uuid:57b88426-cdc0-4c98-83da-ec8622650109

U2 - 10.1002/2017MS001184

DO - 10.1002/2017MS001184

M3 - Article

VL - 10

SP - 98

EP - 125

JO - Journal of Advances in Modeling Earth Systems

T2 - Journal of Advances in Modeling Earth Systems

JF - Journal of Advances in Modeling Earth Systems

SN - 1942-2466

IS - 1

ER -

ID: 43117508