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Advances in Meteorology
Volume 2017 (2017), Article ID 9383495, 8 pages
https://doi.org/10.1155/2017/9383495
Research Article

Impact of Ozone Valley over the Tibetan Plateau on the South Asian High in CAM5

1Shanghai Climate Center, Shanghai 200030, China
2Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing 210044, China
3Shanghai Public Meteorological Service Center, Shanghai 200030, China

Correspondence should be addressed to Dong Guo; nc.ude.tsiun@ouggnod

Received 22 May 2017; Revised 21 July 2017; Accepted 6 August 2017; Published 26 September 2017

Academic Editor: Julio Diaz

Copyright © 2017 Zhenkun Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Local climate effects of Tibetan Plateau Ozone Valley (OVTP) were investigated by numerical simulations using Community Atmosphere Model version 5.1.1 (CAM5). After a 20-year spin-up period, two additional 10-year experiments were conducted. CAM5 was driven by monthly mean climatological ozone in control experiment (CE) and OVTP in the sensitivity experiment (SE) was removed from May to September. After the removal of OVTP, South Asian High (SAH) becomes more robust and colder from June to August, especially in June. The reason for enhancement of SAH is that removal of OVTP increasing ozone in 200–30 hPa leads to significant enhancement of longwave and shortwave radiative heating rate in SAH region in June, and then enhancement of horizontal divergence resulting from the radiative warming leads to strengthening of SAH influenced by the Coriolis force, while the colder SAH is primarily caused by dynamic processes. Adiabatic expansion and ascending movement mainly bring about temperature decrease in SAH after OVTP removal, but the thermodynamic process related to radiative heating offsets part of the cooling response.