平流层臭氧季节变化的动力和光化学作用之比较  

A Comparison of the Contributions of Dynamical Transportation and Photochemical Process to Ozone's Seasonal Variation in the Stratosphere

作　　者：施春华[1] 陈月娟[2] 郑彬[3] 刘毅[4] 

机构地区：[1]南京信息工程大学气象灾害省部共建教育部重点实验室,南京210044 [2]中国科学技术大学地球和空间科学学院,合肥230026 [3]中国气象局广州热带海洋气象研究所/热带季风重点开放实验室,广州510080 [4]中国科学院大气物理研究所中层大气与全球环境探测实验室,北京100029

出　　处：《大气科学》2010年第2期399-406,共8页Chinese Journal of Atmospheric Sciences

基　　金：国家重点基础研究发展计划2010CB428602;国家自然科学基金资助项目40705015;国家自然科学基金资助项目40633015;中国科学院知识创新工程领域前沿项目IAP07311

摘　　要：1992年到2005年的HALOE资料显示,在臭氧光化损耗中,ClOx和NOx的贡献大小和作用位置有所差异。SOCRATES3模式模拟表明,两半球夏季高纬极区的臭氧减少,主要是NOx的化学贡献;北极春季和南极冬季副极地臭氧的变化,主要是动力输送引起。南、北极春季臭氧减少的化学机制也有所不同,南极春季的臭氧耗损包括极区内ClOx的异相化学作用和副极区NOx的化学作用;北极春季的臭氧耗损主要以NOx和ClOx的气相化学作用为主,其中NOx的作用更大。动力和光化学在臭氧变化中的贡献表明,整个中低平流层及低纬平流层高层的动力输送贡献可达到45%,而高纬平流层中上层,化学作用贡献在65%以上。The HALOE trace gases data from 1992 to 2005 show that NOx and ClOx play different roles in the ozone photochemical destruction in the stratosphere.The simulations with SOCRATES3 model indicate that：（1）The ozone depletions of polar areas in summer are mainly attributed to the chemical process of NOx;（2）the ozone variations in the Northern sub-polar areas in spring and in the Southern sub-polar areas in winter are mostly contributed by the dynamical transportation.This study also shows that the photochemical mechanisms of ozone loss in the Antarctic and Arctic stratosphere in spring are different.Heterogeneous reactions of polar ClOx and homogeneous reactions of sub-polar NOx regulate the ozone loss in the Antarctic areas in spring.However,homogeneous reactions of ClOx and NOx dominate the ozone loss in the Arctic areas in spring.The analyses of the contributions of the dynamical transportation and the photochemical process to the ozone show that 45% of the variation in the entire lower and middle stratosphere and the tropical upper stratosphere is attributed to the dynamical transportation,and 65% of the variation in the upper stratosphere at high latitudes is attributed to the photochemical process.

关 键 词：臭氧 季节变化 动力输送 光化作用 数值模拟 

分 类 号：P421[天文地球—大气科学及气象学]