Studying 'cold pole' problem in WACCM and comparisons to lidar temperature morphology

Details Studying 'cold pole' problem in WACCM and comparisons to lidar temperature morphology Studying 'cold pole' problem in WACCM and comparisons to lidar temperature morphology

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa31b1973t&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SA31B-1973

Other

[3337] Atmospheric Processes / Global Climate Models, [3320] Atmospheric Processes / Idealized Model, [3363] Atmospheric Processes / Stratospheric Dynamics

Scientific paper

The 'cold pole' problem refers to the cold bias of stratosphere temperature simulations, when compared to observations, at high latitudes of southern hemisphere during winter and spring in the current atmosphere general circulation models (GCMs) and Chemistry Climate Models (CCMs). Accompanied with the cold pole is the warm bias in the lower mesosphere temperature. It is a long-standing problem in many models including WACCM and this is most likely caused by the lack of wave forcing in southern stratosphere. We developed a new scheme to address the 'cold pole' problem. Our preliminary results indicate this scheme may work. We are adjusting the parameters of our scheme based on lidar temperature data from 1999 to 2001 at the South Pole and from 2003 to 2005 at Rothera, Antarctica (67.5 S, 68 W). Lidar observations at equatorial region and middle-high latitudes of Northern hemisphere will be compared with WACCM and the difference will be identified, to determine the extent to which latitude and seasonal variance can be simulated.

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