Publikationsdatum:
2017-02-13
Beschreibung:
bserved global warming trends have their maximum in Arctic regions, a phenomenon referred to as Arctic Amplification. Consequently, Arctic sea ice shows a strong decreasing trend. These changes imprint modifications on atmospheric flow patterns not only in Arctic regions themselves. Changes of teleconnections and planetary scale motions like Rossby wave trains affect mid-latitude climate as well.
In extension to the studies by Jaiser et al. (abstract submitted) here we study the impact of sea-ice changes on changes in atmospheric synoptic and planetary waves. Therefore, we analyse the atmospheric kinetic energy spectra for ERA-Interim reanalysis and the properly designed Atmospheric General Circulation Model (AGCM) experiments with prescribed sea-ice changes (cf. abstract by Jaiser et al.). Special emphasis has been put on the the role of barotropic-baroclinic interactions and corresponding changes in the tropospheric planetary wave trains by examining the nonlinear kinetic energy and enstrophy interaction and subsequent redistribution of kinetic energy and enstrophy.
Repository-Name:
EPIC Alfred Wegener Institut
Materialart:
Conference
,
notRev
Format:
application/pdf
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