Dynamische Antriebsmechanismen der NAO

Franzke, C.; Blender, R.; Fraedrich, Klaus F.; Lunkeit, F.

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Dynamische Antriebsmechanismen der NAO

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Franzke, C., Blender, R., Fraedrich, K. F., & Lunkeit, F. (2008). Dynamische Antriebsmechanismen der NAO. Promet, 34, 107-111.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-32E3-A

Abstract

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.