Dynamische Antriebsmechanismen der NAO

An analysis of the dynamic mechanisms relevant for the North Atlantic Oscillation (NAO) is performed based on the NCAR-NCEP Reanalysis data set. The NAO is mainly driven by transient fluxes, whereby growth and decay of the NAO-cycle are caused by synoptic waves, which break anticyclonically in the p...

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Bibliographic Details
Main Authors: Franzke, C., Blender, R., Fraedrich, K., Lunkeit, F.
Format: Article in Journal/Newspaper
Language:German
Published: 2008
Subjects:
Iceland
North Atlantic
North Atlantic oscillation
Online Access:http://hdl.handle.net/11858/00-001M-0000-0018-32E3-A
Description
Summary:An analysis of the dynamic mechanisms relevant for the North Atlantic Oscillation (NAO) is performed based on the NCAR-NCEP Reanalysis data set. The NAO is mainly driven by transient fluxes, whereby growth and decay of the NAO-cycle are caused by synoptic waves, which break anticyclonically in the positive phase (negative ano - maly at Iceland) and cyclonically in the negative phase. The NAO-pattern as well as further teleconnections can be simulated with a dynamic atmospheric model. Reanalysis data (ERA40) show that the daily NAO variability is rela ted to the stratospheric circulation.

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