Poster (Scientific congresses and symposiums)
Sensitivity of the Antarctic surface mass balance to oceanic perturbations
Kittel, Christoph; Amory, Charles; Agosta, Cécile et al.
2017AGU Fall meeting 2017
 

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Keywords :
SMB; ocean; Antarctic
Abstract :
[en] Regional climate models (RCMs) are suitable numerical tools to study the surface mass balance (SMB) of the wide polar ice sheets due to their high spatial resolution and polar-adapted physics. Nonetheless, RCMs are driven at their boundaries and over the ocean by reanalysis or global climate model (GCM) products and are thus influenced by potential biases in these large-scale fields. These biases can be significant for both the atmosphere and the sea surface conditions (i.e. sea ice concentration and sea surface temperature). With the RCM MAR, a set of sensitivity experiments has been realized to assess the direct response of the SMB of the Antarctic ice sheet to oceanic perturbations. MAR is forced by ERA-Interim and anomalies based on mean GCM biases are introduced in sea surface conditions. Results show significant increases (decreases) of liquid and solid precipitation due to biases related to warm (cold) oceans. As precipitation is mainly caused by low-pressure systems that intrude into the continent and do not penetrate far inland, coastal areas are more sensitive than inland regions. Furthermore, warm ocean representative biases lead to anomalies as large as anomalies simulated by other RCMs or GCMs for the end of the 21st century.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Kittel, Christoph  ;  Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Amory, Charles ;  Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Agosta, Cécile ;  Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Fettweis, Xavier  ;  Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie
Language :
English
Title :
Sensitivity of the Antarctic surface mass balance to oceanic perturbations
Publication date :
15 December 2017
Event name :
AGU Fall meeting 2017
Event place :
New-Orleans, United States - Louisiana
Event date :
11/12/2017 to 15/12/12017
Audience :
International
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS; CECI
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since 08 December 2017

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