中部型ENSO和平流层准两年振荡对冬季北半球平流层臭氧的联合调制作用  

Joint impacts of ENSO Modoki and QBO on stratospheric ozone in winter in the Northern Hemisphere

作　　者：李小婷 田文寿[1] 谢飞[2,3] 张如华 雒佳丽 梁靖琳[1] LI Xiaoting;TIAN Wenshou;XIE Fei;ZHANG Ruhua;LUO Jiali;LIANG Jinglin(Key Laboratory for Semi-Arid Climate Change of the Ministry of Education,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China;State Key Laboratrry of Numerical Modeling for Atmospheric Sciencss and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;College of Global Change and Earh System Science,Beijing Normal University,Beijing 100875,China)

机构地区：[1]兰州大学半干旱气候变化教育部重点实验室,兰州30000 [2]中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京100029 [3]北京师范大学全球变化与地球系统科学研究院,北京100875

出　　处：《气象学报》2019年第3期456-474,共19页Acta Meteorologica Sinica

基　　金：国家自然科学基金项目(41575038、41630421)

摘　　要：利用观测和再分析资料通过合成分析方法,研究了中部型ENSO和平流层准两年振荡(QBO)对冬季北半球平流层臭氧的独立影响和联合调制作用。研究表明,北半球平流层臭氧在中部型厄尔尼诺年增加,而在中部型拉尼娜年减少;准两年振荡东风位相年份,北半球平流层臭氧增加,准两年振荡西风位相结果则相反。相比之下,北半球中、高纬度平流层臭氧异常对准两年振荡活动的响应明显小于其对ENSO活动的响应。进一步研究发现,准两年振荡东风位相会加强中部型厄尔尼诺事件引起的北半球平流层臭氧的增加,而减弱中部型拉尼娜事件造成的平流层臭氧的减少。在准两年振荡西风位相下,中部型厄尔尼诺事件仅导致北半球平流层臭氧含量少量升高,而中部型拉尼娜事件期间臭氧会大幅度减少。因此,准两年振荡东风位相会加强中部型厄尔尼诺事件对北半球平流层臭氧的影响,而减弱中部型拉尼娜事件对北半球平流层臭氧的影响。准两年振荡西风位相会减弱中部型厄尔尼诺而加强中部型拉尼娜事件对北半球平流层臭氧的影响。Composite analysis is applied in the present study to investigate independent and joint impacts of the second type of El Nino-Southern Oscillation(ENSO Modoki) and the Quasi-biennial Oscillation(QBO) on stratospheric ozone in the Northern Hemisphere(NH) in winter using observed ozone data and reanalysis data. The analysis reveals that stratospheric ozone in the NH in winter increases during El Nino Modoki events but decreases during La Nina Modoki events. Stratospheric ozone in the NH in winter increases during the east wind phase of the QBO(EQBO) and decreases during the west wind phase of the QBO(WQBO). In contrast, stratospheric ozone anomalies in the middle and high latitudes caused by ENSO activities are evidently larger than those related to the QBO phases. Further analysis indicates that during the EQBO phase, stratospheric ozone anomalies in the NH are amplified during El Nino Modoki events but reduced during La Nina Modoki events. During the WQBO phases, El Nino Modoki events only slightly increase the stratosphere ozone concentration in the NH in winter, while the ozone concentration is greatly reduced during La Nina Modoki events. Therefore, the EQBO enhances the effect of El Nino Modoki events on stratospheric ozone in the NH, but weakens the effect of La Nina Modoki events. The WQBO weakens the effect of El Nino Modoki events but intensifies the effect of La Nina Modoki events on stratospheric ozone in the NH.

关 键 词：中部型ENSO 平流层准两年振荡(QBO) 北半球平流层臭氧 联合调制作用 

分 类 号：P421.33[天文地球—大气科学及气象学]