Planetary Waves, Ozone Distribution And Tropopause Height Asymmetries In Connection To Antarctic Peninsula Warming

Details Planetary Waves, Ozone Distribution And Tropopause Height Asymmetries In Connection To Antarctic Peninsula Warming Planetary Waves, Ozone Distribution And Tropopause Height Asymmetries In Connection To Antarctic Peninsula Warming

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufm.a53e..11m&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #A53E-11

Physics

1637 Regional Climate Change, 3305 Climate Change And Variability (1616, 1635, 3309, 4215, 4513), 3362 Stratosphere/Troposphere Interactions, 3389 Tides And Planetary Waves, 4554 Planetary Waves

Scientific paper

Decadal variations of the quasi-stationary wave amplitude and zonal structure are analyzed using the TOMS data. Seasonal dependence of total ozone content (TOC) is considered. The amplitudes of quasi-stationary planetary waves in TOC zonal distribution at high latitudes of Southern Hemisphere are calculated for 1979-2005. The highest values of the quasi-stationary wave amplitude at latitude 65S in October are observed. The asymmetry of total ozone distribution over Antarctic region during Austral spring is discussed. The amplitude and longitudinal position of zonal anomalies are calculated for total ozone content distribution along seven individual latitude bands at 5-degree intervals between 50S and 80S. The mid-latitude ozone-rich collar has a mid-latitude maximum with mean position between 90E-180E longitudes and with up to 390 DU. The significant planetary wave TOC minimum eastward shift about 40 degrees in longitude is observed over Weddell Sea during 1979-2005, whereas the zonal maximum is relatively stable in position. This displacement is discussed in connections to latest findings of the strengthening circumpolar westerlies and regional climate warming in Antarctic Peninsula. Tropopause height anomalies over Antarctic region show seasonal change associated with total ozone losses during spring months. The tropopause height anomaly in West Antarctica coupled with its increasing decadal trend could be involved in climate change in this region. The research was made in the framework of the SCAR ICESTAR Program, and ORACLE-O3 IPY Project, and partly supported by project 06BF051-12, Grant Greece-Ukraine M/86-2006, and Australian Antarctic Science project 737.

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