Ozone Hole Meteorology: 2011 Heat Flux
Variations of temperature are strongly affected by weather systems in the troposphere. Very large-scale weather systems or waves can move or propagate upward into the stratosphere. The upward propagation of these weather systems warms the polar region. We measure this upward flow of wave energy with the eddy heat flux. The eddy heat flux is the product of north-south (meridional) wind departures and temperature departures from their respective zonal-mean values. There is a strong anticorrelation between stratospheric temperature and the 45-day average of the eddy heat flux lagged prior to the temperature. A more negative value of eddy heat flux indicates that wave systems are moving into the stratosphere and are warming the polar region.
Comparison to all years
The following figures show the daily progression through the ozone hole season, comparing the current year to the climatology of all other years.
-- click on a link for a PDF figure --