Wintertime thermal structure and variations from ground to mesopause region at Syowa Station (69.00S, 39.35E), Antarctica

Details Wintertime thermal structure and variations from ground to mesopause region at Syowa Station (69.00S, 39.35E), Antarctica Wintertime thermal structure and variations from ground to mesopause region at Syowa Station (69.00S, 39.35E), Antarctica

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsa12a0670k&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SA12A-0670

Physics

1620 Climate Dynamics (3309), 3309 Climatology (1620), 3332 Mesospheric Dynamics

Scientific paper

Over the past decade, lidar observations of the mesopause region has advanced our understanding of its counter-intuitive thermal structure greatly. Based on ground-based observation in three stations (at 41N, 54N, and 69N) in the northern hemisphere and a single shipborne observational campaign between 66S and 54N, She and von Zahn (1998) suggested the concept of two-level mesopause temperature structure world-wide. However, there is considerable lack of data from the southern hemisphere to substantiate a global picture on the thermal structure of the mesopause region. In addition to recent Boltzmann lidar measurements from South Pole (Gardner et al., 2000), temperature measurements in the mesopause region have been conducted with a new sodium lidar at Syowa Station (69.00S, 39.35E) since Feb. 2000. This paper will present monthly temperature profiles and the observed variation between March and October based on 70 nights (700 hours) of observation in 2000. With the help of the collocated balloon sonde (0-30km) and Rayleigh lidar (25-60km), composite monthly mean temperature profiles from ground to the mesopause region will be reported. Temperature variations during this period between stratosphere and mesopause region over Syowa Station will be compared, along with comparison of the temperature climatology between Antarctic middle atmosphere and that of the northern hemisphere.

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