Japan Geoscience Union Meeting 2014

Presentation information

Print

Oral

Symbol A (Atmospheric, Ocean, and Environmental Sciences) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS21_30PM1] Stratospheric Processes And their Role in Climate

Wed. Apr 30, 2014 2:15 PM - 4:00 PM 313 (3F)

Convener:*Kazuyuki Miyazaki(Research Institute for Global Change, JAMSTEC), Masakazu Taguchi(Aichi University of Education), Yoshio Kawatani(Japan Agency for Marine-Earth Science and Technology), Kaoru Sato(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Chair:Kazuyuki Miyazaki(Research Institute for Global Change, JAMSTEC)

3:30 PM - 3:45 PM

[AAS21-19] Total ozone reduction over Rio Gallegos (Argentina) in November 2009 simulated by MIROC3.2 Chemical Transport Model

*Hideharu AKIYOSHI1, Masanao KADOWAKI1, Haruna NAKAMURA2, Takafumi SUGITA1, Tetsu NAKAMURA3, Akira MIZUNO4 (1.NIES, 2.Fujitsu FIP, 3.Arctic Environment Research Center, NIPR, 4.STEL, Nagoya University)

Keywords:Argentina, ozone hole, CTM, polar vortex, SATREPS, November 2009

de Laat et al. (Geophys. Res. Lett., 2010) reported three weeks of reduced total ozone columns over the southern tip of South America in November 2009. The duration of the low total ozone was unusual for the regions. Ozone vertical profile measurements at Rio Gallegos, Argentina (51S, 69W) by ozone LIDAR suggest that the isentropic surfaces of 675K and 475K over Rio Gallegos was inside the Antarctic polar vortex around 13-14 November and 22-23 November respectively thus the low total ozone lasted for three weeks (Wolfram et al, 5th SPARC General Assembly, Queenstown, New Zealand, 2014). MIROC 3.2 Chemical Transport Model with a horizontal resolution of T42 (corresponding to 2.8 degree by 2.8 degree in grids) simulates this long term reduced total ozone over Rio Gallegos. The dynamical and chemical fields around the Antarctica in November 2009 are analyzed. Investigations of these fields for the other past years and comparisons with those in 2009 will be performed.