Sentences with phrase «stratospheric circulation»
"Stratospheric circulation" refers to the movement of air in the stratosphere, which is the layer of the Earth's atmosphere located above the troposphere. It describes how air currents and winds in the stratosphere interact and circulate around the planet. Full definition
Lukovich and Barber: The results from an investigation of stratospheric circulation in winter and spring, and comparison of summertime surface winds and SLP with vortex splitting and minima in sea ice extent composites suggested that the September, 2009 ice extent would be comparable to or less than the September ice extent minimum in 2008, based on dynamic considerations.
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While ozone - depleting chemicals are still playing a role, natural factors, such as stratospheric circulation, also helped drive this year's widespread thinning.
For stratospheric circulation (which impacts strat - trop exchange, high latitude sea level pressure fields), we tune the GW drag.
If the aerosols get concentrated in polar subsiding zones due to some unexpected stratospheric circulation — much as Titan's haze congregates at the pole — that could be bad news regionally for the Nordic countries, I suppose.
Stratospheric circulation slowly shifts the contours of the ozone hole over the course of the day (like winds shift the location of clouds).
Under these circumstances, the reduced vertical stability in the N.H. helps generate increased wave energy that results in a very different stratospheric circulation and height / pressure response pattern.
Chapter 2 discusses stratospheric circulation and how it has changed in recent decades.
Studies using GCMs concur that STE should increase in the future climate because of the stronger Brewer - Dobson stratospheric circulation (Sudo et al., 2002a; Collins et al., 2003; Zeng and Pyle, 2003; Hauglustaine et al., 2005; Stevenson et al., 2006)(errata).
In a study published in Nature Geoscience this week (subscription), Michaela Hegglin and Theodore Sheperd at the University of Toronto used the Canadian Middle Atomosphere Model, which fully resolves stratospheric circulation, to project ozone changes under the IPCC's medium - emissions A1B scenario.
A study of the coupling between the tropical QBO and the global stratospheric circulation has been performed by Marquardt (1998).
Despite having little effect on global mean warming, we show that downward coupling of observed stratospheric circulation changes to the surface can account for the majority of change in regional surface climate over Europe and North America between 1965 and 1995.
This is because of the differences in layout of the continents in the two hemispheres affects the dynamics of stratospheric circulation.
A negative anomaly in Arctic stratospheric ozone cools the stratosphere in the region, strengthening the stratospheric circulation.
When the Arctic stratospheric ozone falls, the lower stratosphere in the Arctic cools, the researchers believe, boosting the southerly temperature gradient and, in turn, strengthening the stratospheric circulation.
This wave energy propagates up into the S.H. stratosphere and intensifies the stratospheric circulation.
This version is a complete rewrite of previous models incorporating numerous improvements in basic physics, the stratospheric circulation and forcing fields.
«The weakening and strengthening of the stratospheric circulation seems to correspond with changes in ocean circulation in the North Atlantic,» Reichler says.
Similarly, increased carbon dioxide in the stratosphere has led to gradual cooling conditions, which affects the UV influence on the stratospheric circulation.