Other
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sunge...3...72k&link_type=abstract
Sun and Geosphere, vol.3, no.2, p.72-80
Other
Scientific paper
The purpose of this paper is to isolate the main factors standing behind the polar night jet variability. We find out that stratospheric thermo-dynamical conditions prior to the onset of the two different types of major stratospheric (MSWs) are substantially different. We discover that the splitting of the polar vortex is critically dependent on the deceleration of the core of the westerly jet. Examination of the stratospheric thermal regime shows that such a deceleration is observed prior to the onset of the split vortex events and is obviously related to the broad heating of the whole middle stratosphere from the pole to the mid-latitudes. Multiple factorial analyses of the potential triggers of this pre-conditional warming reveal that about 50-60% of the total T and U variability can be attributed to a sudden decrease of the galactic cosmic rays. We hypothesize that its relation to the abrupt increase of the stratospheric temperature is through the corresponding enhancement of the ozone concentration. The later is a result from the reduction of the ozone depleting compounds, i.e. NOx and NOx families. The displacement type of MSWs appears when the pre-conditional warming of the stratosphere is confined to the Pole (below 10 hPa). In this case the vortex is highly baroclinic, and even highly distorted dos not split. Statistical analysis shows that the impact of all examined factors is much less, compared to the split vortex MSWs, what supposes that some other mechanisms, or their combination, are responsible for the appearance of this type of MSWs.
No associations
LandOfFree
Mechanism of Solar influence on the winter time Polar Atmosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Mechanism of Solar influence on the winter time Polar Atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mechanism of Solar influence on the winter time Polar Atmosphere will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-796941