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Deep depressions in the Euro-Atlantic Summer circulation

Urheber*innen

D'Andrea,  Fabio
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Riviere,  Gwendal
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Duvel,  Jean-Philippe
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Vautard,  Robert
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Couou,  Dim
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Jezequel,  Aglae
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Faranda,  Davide
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Zitation

D'Andrea, F., Riviere, G., Duvel, J.-P., Vautard, R., Couou, D., Jezequel, A., Faranda, D. (2023): Deep depressions in the Euro-Atlantic Summer circulation, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4467


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021896
Zusammenfassung
West European summer temperature has increased at a higher rate than the global mean, and this increase is not reproduced by most last generation climate models. Previous studies suggest that this discrepancy originates from a bad representation of the summer atmospheric dynamics. In this study, a simple algorithm is used to count deep depressions in the North Atlantic summer. A strong increasing trend in deep cyclonic depressions is found in reanalysed data, most notably in the eastern Atlantic region off the continental European coasts. It is suggested that this increase is contributing in a maesurable way to continental Europe temperature increase. A sample of CIMP6 climate is used to show that this trend is absent in historical simulations. The dynamical framework accompayining the deep depression events is also described.