大气科学2017，Vol.41Issue(2)：275-288,14.DOI:10.3878/j.issn.1006-9895.1605.15324
热带平流层CO浓度准两年振荡的位相变化特征
Phase Change in Quasi-biennial Oscillation in the Tropical Stratospheric Carbon Monoxide Concentration
摘要
Abstract
The MLS (Microwave Limb Sounder) satellite observations of carbon monoxide (CO) mixing ratios from 2005 to 2014 have been analyzed to study the inter-annual variation of carbon monoxide (CO) in the tropical stratosphere.The results show that the quasi-biennial oscillation (QBO) in the tropical stratospheric CO mixing ratios has a phase change at 30 hPa.The results from a chemistry-climate model show that the CO QBO is primarily resulted from combined effects of dynamical and chemical processes associated with CO,while the dynamical process is mainly associated with the transport of CO by the QBO-induced meridional circulation.The combined effects of dynamical and chemical processes lead to a reverse of the CO vertical gradient in the tropical stratosphere at 30 hPa.Consequently,the CO QBO exhibits a phase change around this level.The model results also show that the chemical processes associated with CO not only have a weakening effect on the amplitude of the CO QBO,but also lead to a QBO phase difference by 3 months between zonal wind QBO and CO QBO at 10-30 hPa.关键词
平流层/一氧化碳(CO)/准两年振荡(QBO)/全球化学气候模式(WACCM)/位相变化Key words
Stratosphere/Carbon monoxide (CO)/Quasi-biennial oscillation (QBO)/The Whole Atmosphere Community Climate Model (WACCM)/Phase change分类
天文与地球科学引用本文复制引用
王春晓,田文寿..热带平流层CO浓度准两年振荡的位相变化特征[J].大气科学,2017,41(2):275-288,14.基金项目
国家自然科学基金项目41575038、41175042,国家杰出青年科学基金项目41225018 National Natural Science Foundation of China (Grants 41575038,41175042),National Science Fund for Distinguished Young Scholars of China (Grant 41225018) （Grants 41575038,41175042）
