Sökning: "atmospheric blocking"
Visar resultat 1 - 5 av 13 avhandlingar innehållade orden atmospheric blocking.
1. Arctic Atmospheric Rivers : Eulerian and Lagrangian features, and trends over the last 40 years
Sammanfattning : Arctic Atmospheric rivers, termed ‘warm-and-moist intrusion’ (WaMAI) in this thesis, transporting heat and moisture into the Arctic from lower latitudes, is a key contributor to the amplified warming in the Arctic under global change (Arctic Amplification). However, the warming effect of WaMAIs and its transformation along the trajectories into high Arctic still remain unclear, as well as their relation with the large-scale atmospheric circulation. LÄS MER
2. Paths to improving atmospheric models across scales : The importance of the unresolved scales
Sammanfattning : Correct representation of physical processes, the parametrizations, and their interaction with the resolved circulation is crucial for the performance of numerical models. Here, focus is put on understanding model biases and developing tools to alleviate existing biases. LÄS MER
3. On atmospheric blocking action : a study in dynamic climatology
Sammanfattning : .... LÄS MER
4. On the atmospheric transport pathways of heat into the Arctic in winter and spring
Sammanfattning : The atmospheric meridional energy transport is an important component in the global climate system, as it transports moisture and heat from the midlatitudes into the Arctic, balancing the regional energy loss to space. Narrow and intense injections of warm and moist air, so-called warm-air intrusions, have a large local imprint on the surface through various processes acting on different scales, such as cloud formation, turbulent fluxes and atmospheric large-scale circulation. LÄS MER
5. On atmospheric low frequency variability, teleconnections and link to jet variability
Sammanfattning : The atmosphere is a complex system with an infinite number of independent variables. The best approximations of the atmosphere are made using numerical models. The use of such models provides an invaluable tool for studying the atmospheric system. LÄS MER