Séminaire IGE

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Exploring Arctic-Midlatitude Linkages: The Role of Atmospheric Variability

vendredi 13 décembre 2024 - 13h30

Maria Santolaria Otin - IGE
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Arctic forcing on the atmosphere from sea-ice decline and terrestrial snow is intensifying. However, Arctic-midlatitude linkages are still not fully understood as connectivity can be masked by the influence of chaotic, internal climate variability.  Recent Arctic sea-ice loss has been accompanied by frequent severe winters over northern mid-latitudes, particularly in central Eurasia. The dipole between warm anomalies at polar latitudes and cold anomalies at middle latitudes has been termed as “warm Arctic-cold Eurasia” (WACE) pattern. The dynamics underlying this covariance seem to include an anticyclonic circulation over the Siberian coast whose identification has been ambiguous in literature. Here, I will give and overview of the Arctic-midlatitude linkages and present our recent investigation on the characterization of two distinct atmospheric variability modes, namely the Ural-Siberian (USib) pattern and the Siberian High (SH). This study has been conducted in collaboration with H. Nakamura (RCAST; University of Tokyo) and M. Mori (RIAM;Kyushu University) among others, thanks to the CANON Research Fellowship.

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Equipe organisatrice : Organisation labo

Salle de conférence MCP, IGE MCP, 38400 Saint Martin d'Hères

Informations de visio :

Register here : https://univ-grenoble-alpes-fr.zoom.us/meeting/register/tJMvdu2opz8jHd2lTeg8i9W1A1EuJftY4CpJ#/registration