Sökning: "north-atlantic"

Visar resultat 1 - 5 av 90 avhandlingar innehållade ordet north-atlantic.

1. 1. Deglacial impact of the Scandinavian Ice Sheet on the North Atlantic climate system

   Författare :Francesco Muschitiello; Barbara Wohlfarth; Raimund Muscheler; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; climate; North Atlantic; last deglaciation; isotope geochemistry; chronology; climate modeling; Marine Geology; maringeologi;

   Sammanfattning : The long warming transition from the Last Ice Age into the present Interglacial period, the last deglaciation, holds the key to our understanding of future abrupt climate change. In the last decades, a great effort has been put into deciphering the linkage between freshwater fluxes from melting ice sheets and rapid shifts in global ocean-atmospheric circulation that characterized this puzzling climate period. LÄS MER

3. 2. New constraints on paleoreconstructions through geochronology of mafic dyke swarms in North Atlantic Craton

   Författare :Mimmi Nilsson; Berggrundsgeologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; baddeleyit; U-Pb; geokronologi; large igneous province; mantelplym; superkontinent; paleorekonstruktion; North Atlantic craton; baddeleyite; Large Igneous Province; Mantle plume; supercontinent; paleoreconstruction; U-Pb; geochronology; North Atlantic craton;

   Sammanfattning : Earth history is punctuated by a series of events of supercontinent amalgamation and break-up. Fragments of old continents display rifted margins and orogenic sutures that testify their involvement in supercontinent cycles. LÄS MER

4. 3. Extreme Storms in the North Atlantic and Europe

   Författare :John Hanley; Rodrigo Caballero; Joaquim Pinto; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

   Sammanfattning : A study of the most extreme cyclones affecting the North Atlantic and Europe is presented with particular focus on extreme windstorms over the densely populated area of Western Europe, whose associated high surface wind speeds are capable of causing extensive structural damage and occasionally a loss of life.A novel cyclone identification and tracking algorithm is presented which explicitly recognises ‘multi-centre cyclones’ (MCCs), defined as cyclonic systems which contain two or three sea-level pressure minima. LÄS MER

5. 4. Causal links of past climate change in Coupled Model Intercomparison Project Phase 5 climate models

   Författare :Thanh Le; MERGE: ModElling the Regional and Global Earth system; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; solar forcing; volcanic forcing; greenhouse gases radiative forcing; Granger causality; near-surface air temperature; ENSO; IOD; CMIP5; North Atlantic;

   Sammanfattning : The climate system is influenced by various external forcings (e.g. volcanic forcing, solar forcing and change of greenhouse gas concentrations) and its own internal climate variability. LÄS MER

7. 5. Wintertime compound extremes in Europe and North America : from dynamics to predictability

   Författare :Richard Leeding; Gabriele Messori; Jacopo Riboldi; Deliang Chen; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cold Spells; Climate Extremes; Extratropical Cyclones; North Atlantic; North America; Europe; Meteorologi; Meteorology;

   Sammanfattning : This thesis examines the co-occurrence of wintertime low temperature extremes (cold spells) over North America and wet or windy extremes over Europe. Prolonged (≅ 5 days) North American cold spells can be associated with both upstream and downstream anomalous large-scale atmospheric flows, the latter modulating extreme weather occurrences over Europe. LÄS MER