Physics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsa74a..03h&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #SA74A-03
Physics
3319 General Circulation (1223), 3332 Mesospheric Dynamics, 3334 Middle Atmosphere Dynamics (0341, 0342), 3362 Stratosphere/Troposphere Interactions, 3389 Tides And Planetary Waves
Scientific paper
The International Polar Year (IPY) was an international scientific program focused on intensive observations in the Arctic and Antarctic from March 2007 to March 2009. As part of this effort, we present results of an NSF funded project, 'Pan-Arctic Studies of the Coupled Tropospheric, Stratospheric, and Mesospheric Circulation'. Planetary and gravity waves are mechanisms by which the troposphere is coupled to the stratosphere and mesosphere. When planetary wave amplitudes are large they break and form intense anticyclones that occasionally extend from the upper troposphere to the middle mesosphere. In addition, the Arctic polar vortex provides a means by which the stratosphere is coupled, both chemically and dynamically, to the troposphere below and the mesosphere above. Three-dimensional animations of the Arctic vortex and anticyclones will be shown to illustrate this vertical coupling during major stratospheric warming events that occurred in 2007-2008 and 2008-2009. An unprecedented stratospheric warming and subsequent mesospheric cooling event in January and February 2009 will be emphasized. Following the warming event the vortex in the upper stratosphere strengthened similar to 2004 and 2006; record cold temperatures were observed in the vortex near 45 km, mesospheric air rapidly descended in the vortex, and the separated polar winter stratopause soared above 80 km. Lidar temperature measurements at multiple Arctic sites taken during the events are interpreted based on the air masses in which the instruments measured. The vertical temperature structure varies considerably depending on whether the polar vortex or the Aleutian anticyclone was sampled. A web site http://research.iarc.uaf.edu/IPY-CTSM/index.php has been established as an archive of the daily dynamical evolution of the Arctic troposphere, stratosphere, and mesosphere during the two IPY winters. This site has been maintained in near-real time and thus has been a useful resource to coordinate the timing, and aid in the interpretation, of single-site observations of temperature and chemical constituents.
Atkinson David E.
Collins Richard L.
Harvey Vanessa
Thurairajah B.
No associations
LandOfFree
Vertical Coupling Between the Stratosphere and Mesosphere During IPY 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 Vertical Coupling Between the Stratosphere and Mesosphere During IPY, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vertical Coupling Between the Stratosphere and Mesosphere During IPY will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1108627