平流层行星波对CH_4季节变率的影响  

Influence of Planetary Wave on the Seasonal Variability of Stratospheric Methane

作　　者：郑彬[1] 施春华[2] 

机构地区：[1]中国气象局广州热带海洋气象研究所/热带季风重点实验室,广东广州510080 [2]南京信息工程大学大气科学学院,江苏南京210044

出　　处：《高原气象》2009年第1期91-97,共7页Plateau Meteorology

基　　金：国家自然科学基金项目(40705015)资助

摘　　要：分析了1992-2000年各季节卤素掩星试验（Halogen Occultation Experiment）HAOLE的CH4混合比资料，并用美国国家大气研究中心（the National Center for Atmospheric Research）NCAR的平流层二维模式（Simulation of Chemistry,Radiation,and Transport of Environmentally important Species）SOCARTES研究了CH4在冬,夏季节变率与平流层行星波对CH4浓度输送之间的关系，结果表明：观测和模拟的CH4混合比季节变化都很明显，而模拟的CH4浓度季节变率比观测值小30%-60%。分析结果还表明，模式中行星波引起的CH4浓度变化主要贡献于30km以下的季节变率。比较了模拟和观测的行星波对CH4的输送结果，结果显示模式明显低估了行星波的输送，这也是模式中季节变率比观测偏小的一个主要原因。The methane mixing ratio of Halogen Occultation Experiment （HAOLE） sunrise data from 1992 to 2000 were used to analyze its seasonal variability in the stratosphere, and the National Center for Atmospheric Research （NCAR） SOCRATES （Simulation of Chemistry, Radiation, and Transport of Environmentally important Species） model is utilized to simulate the relationship of the methane seasonal variability with stratospheric planetary wave. The results indicate that there are significant seasonal variability both the observations and simulations, but the simulated variability is 30%-60% smaller than that in the observations. Otherwise, the transports by the planetary wave contribute to the methane seasonal variability in the model mainly below 30 km. Comparing with the CH4 transports by planetary wave in the model and observation, the result indicates that the model underestimate the effect of the planetary wave on the CH4 seasonal variability, which may be a main cause to induce a weak seasonal variability in the model.

关 键 词：平流层 行星波 CH4 数值模拟 卤素掩星试验 

分 类 号：P402[天文地球—大气物理学与大气环境]