Figures from : Baldwin, M.P., and T.J. Dunkerton, 2001: Stratospheric harbingers of anomalous weather regimes. Science, 294, 581-584.

PowerPoint File of Figures Time-height development of the northern annular mode during the winter of 1998-1999. Composites of time-height development of the northern annular mode for (A)18 weak vortex events and (B) 30 strong vortex events.. Average sea level pressure anomalies (hPa) for (A) the 1080 days during weak vortex regimes and (B) the 1800 days during strong vortex regimes.. Probability density function for the normalized daily AO index.. Probability density function for the normalized daily NAO index. Click on a figure for a full size view or click the PDF/EPS link to download. FIGURE 1 PDF EPS FIGURE 2 PDF EPS FIGURE 3 PDF EPS FIGURE 4a PDF EPS FIGURE 4b PDF EPS

Figures from : Thompson, D.W.J., M.P. Baldwin, and J.M. Wallace, 2001: Stratospheric connection to Northern Hemisphere wintertime weather: implications for prediction. J. Climate, 15, 1421-1428.

PowerPoint File of Figures Difference in SAT: stratospheric vortex anomalies: QBO;ENSO. WSI composites: stratospheric vortex anomalies. WSI composites: QBO. Cold events following weak and strong vortex conditions. Cold events during the easterly & westerly phases of the QBO. Click on a figure for a full size view or click the PDF/PS link to download. FIGURE 2 PDF PS FIGURE 3 PDF PS FIGURE 4 PDF PS TABLE 1a PDF PS TABLE 1b PDF PS

Figures from : Thompson, D.W.J., and J.M. Wallace, 2001: Regional Climate Impacts of the Northern Hemisphere Annular Mode. Science, 293, 85-89.

PowerPoint File of Figures Composite maps of SLP and SAT. Composite maps of 500Z. Click on a figure for a full size view or click the PDF/PS link to download. FIGURE 1a PDF PS FIGURE 1b PDF PS FIGURE 1c PDF PS FIGURE 3 PDF PS Cold events and the NAM. Distribution of high and low NAM-index days. Significant weather events associated with the NAM. FIGURE 4 PDF PS TABLE 1 PDF PS TABLE 2a PDF PS TABLE 2b PDF PS TABLE 3 PDF PS

Figures from : Thompson, D.W.J., and J.M. Wallace, 2000: Annular modes in the extratropical circulation. Part I: Month-to-month variability. J. Climate, 13, 1000-1016.

PowerPoint File of Figures Supplemental Figures. Click on a figure for a full size view or click the PS link to download. Supplemental Figure 1 PS Supplemental Figure 2 PS Figure 1a PS Figure 1b PS Figure 7a PS Figure 7b PS Figure 7c PS Figure 7d PS

Figures from : Thompson, D.W.J., J.M. Wallace and G.C. Hegerl, 2000: Annular modes in the extratropical circulation. Part II: Trends. J. Climate, 13, 1018-1036.

PowerPoint File of Figures SLP (Z1000) per 30-years. SAT per 30-years. March TOMS Ozone per 15-years. Zonal mean circulation per 30-years. Zonal mean temperature per 30-years. Click on a figure for a full size view or click the PS link to download. FIGURE 2a PS FIGURE 2b PS FIGURE 6a PS FIGURE 7a PS FIGURE 7b PS

Figures from Lecture Notes: Figures from: Wallace, J. M., 2000: On the Arctic and Antarctic Oscillations. Lecture at the 2000 NCAR ASP Summer Colloquium on the Dynamics of Decadal to Centennial Climate Variability (Edited by Eric DeWeaver and Michael Palmer). Electronic version of notes available through this link.
Time Series Index of the Northern Hemisphere annular mode, Jan-Mar 1900-2002 Source: David Thompson davet@atmos.colostate.edu Electronic version of notes available through this link.
Schematics National Geographic schematic of the high and low index polarities of the NH annular mode. Includes a description of the contrasting polarities of the AO written by T. Mitchell Source: Hodges, Glenn. 2000: The new cold war. Stalking arctic climate change by submarine. National Geographic, March 30-41. Please credit National Geographic if using their artwork. Thank you. Schematic of the high and low index polarities of the NH annular mode Source: David W. J. Thompson davet@atmos.colostate.edu
Todd Mitchell's annular mode regressions Precipitation and temperature regressions on the AO Source: Todd Mitchell mitchell@atmos.washington.edu
Movies GIF movie of the downward propagation of zonal wind anomalies. Source: Bo Christiansen boc@dmi.dk
David W. J. Thompson davet@atmos.colostate.edu