Description du projet
Étude du rôle de la glace de mer dans les vagues d’air froid
Les vagues d’air froid sont une caractéristique typique du climat des latitudes moyennes pendant la saison hivernale et peuvent être à l’origine de températures anormalement basses qui endommagent les cultures ou entraînent de fortes chutes de neige. Pourtant, le rôle de certaines composantes du système climatique, comme la glace de mer, reste inconnu. Le projet Polar2MidLat, financé par l’UE, analysera les mécanismes physiques reliant la variabilité à de hautes latitudes (y compris celle de la glace de mer) à la variabilité climatique à des latitudes moyennes. Le projet utilisera également un ensemble de données issues de simulations de modèles climatiques mondiaux couplés à très haute résolution (à environ 10 km), ce qui devrait considérablement améliorer la représentation de la glace de mer ainsi que ses liens avec d’autres composantes du système climatique.
Objectif
Cold air outbreaks are a typical feature of the mid-latitude climate during the cold season. Their relevance relies on the threat to life caused by the long-lasting periods with abnormally low temperatures as well as on the potential of damage to crops and the occurrence of high-impact weather events such as heavy snow and low visibility during blizzards.
Previous studies have documented the linkages between climate variability at high latitudes with that at mid-latitudes mainly through modulation of the storm tracks, jet streams and patterns of stationary waves which promote blocking events. The role of other components of the climate system, like sea ice, is much less understood and remains an open question. This becomes even more challenging under the current conditions of fast sea ice reduction in the Arctic and the significant trends observed in sea ice around Antarctica, which leads to an increase in uncertainty in the area of sub-seasonal to interannual climate predictions as well as for climate projections for the coming decades. Furthermore, significant biases currently exist in the representation of sea ice in state-of-the-art climate model simulations.
The main objective of this proposal is to analyze the physical mechanisms linking variability at high latitudes (including that of sea ice) with climate variability at mid-latitudes. Special focus will be driven onto the mechanisms promoting cold snaps at mid-latitudes and on their variability. To this aim, this project will make use of a data set of very-high-resolution coupled global climate model simulations (at around 10 km) which is expected to bring significant improvements to the representation of sea ice as well as to its linkages with other components of the climate system. Outcomes of this project are expected to become useful for decision makers and stakeholders, as well as to researchers working in the field of climate predictions and projections.
Champ scientifique
CORDIS classe les projets avec EuroSciVoc, une taxonomie multilingue des domaines scientifiques, grâce à un processus semi-automatique basé sur des techniques TLN.
CORDIS classe les projets avec EuroSciVoc, une taxonomie multilingue des domaines scientifiques, grâce à un processus semi-automatique basé sur des techniques TLN.
Programme(s)
- HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA) Main Programme
Régime de financement
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European FellowshipsCoordinateur
08034 Barcelona
Espagne