spacer
Woods Hole Oceanographic Institution

Jason C. Goodman

spacer
Publications
»Europa 2006
»Enceladus 2006
»Annular Modes 2006
»Snowball Earth 2006
»Europa 2004
»Snowball Earth 2004
»Climate Variability 2003
»Climate Variability 2002
»Climate Variability 1999


spacer
Goodman, J. C. and A. Czaja,, Why the West Wind Wobbles: Viewing Annular Modes as Stochastically-Excited Potential Vorticity Reservoirs, submitted to Quarterly Journal of the Royal Meteorological Society, 2006

The Northern and Southern Annular Modes can be thought of as modulating the polar pools of high potential vorticity (PV). Meridional PV fluxes caused by synoptic weather stochastically add or remove PV from this reservoir, gradually increasing or decreasing the strength of the annular mode. We demonstrate that much of the variability of the annular modes in both a 3-layer quasigeostrophic model and in NCEP-NCAR reanalyses can be explained by this simple stochastic process.

FILE » Annular Modes 2006



© Woods Hole Oceanographic Institution
All rights reserved