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Giorgia Fosser
Public Documents
3
A method to assess and explain changes in sub-daily precipitation return levels from...
Eleonora Dallan
and 6 more
August 03, 2023
A document by Eleonora Dallan. Click on the document to view its contents.
Dynamical factors heavily modulate the future increase of sub-daily extreme precipita...
Eleonora Dallan
and 4 more
August 10, 2024
A document by Eleonora Dallan. Click on the document to view its contents.
On the relationship between Ural blocking and Arctic-midlatitude thermal gradient
Marco Cadau
and 6 more
April 23, 2024
In this study, the relationship between the interannual variability of Arctic-midlatitude thermal gradient (AMG) and the winter atmospheric blocking frequency in the Ural region (UBF) is investigated in the ERA5 reanalysis product from 1940 to 2023. In particular, the paper focuses on the large-scale atmospheric circulation patterns associated with high UBF concomitant to weak AMG and vice versa, revisiting the more common and documented relationship connecting intense Ural blocking activity to strong AMG. Results show that displacements of the atmospheric blocking from the Ural region towards the Arctic lead to anomalous southerly thermal advections at polar latitudes and stronger AMG. On the other hand, high blocking frequency co-occurring in the Ural, Greenland and Chukotka regions lead to weaker AMG by limiting northward heat advections towards the Arctic region. These findings highlight a more complex picture of the role of subpolar atmospheric circulation in controlling the AMG.