Interannual Variations of Ozone and Their Relationship to Variations of Tropospheric Structure

9732542Salby卫星记录的臭氧总量表明，1980年后中纬度地区的臭氧总量呈系统性下降。 这些变化的起源的一个线索来自于它们强烈的季节性和地理依赖性，这反映了臭氧总量本身的季节性和结构。 数值模型低估了观测到的中纬度臭氧总量趋势，模型仅预测了观测到的减少量的一半。 Salby博士和他的同事们认为，这种差异可能源于目前在模型模拟中没有考虑到的年际变化。因此，Salby博士及其同事将探讨臭氧的年际变化与对流层结构变化的关系。 根据试点研究的初步结果，它们将综合平流层化学和动力结构的年际变化。 以类似方式合成的对流层结构的年际变化将被用来驱动数值积分，以研究平流层的变化如何取决于行星波活动和影响臭氧的其他对流层特征的变化。

9732542Salby Satellite records of total ozone indicate a systematic decline at midlatitudes after 1980. A clue to the origin of these changes comes from their strong seasonal and geographical dependence which mirror the seasonality and structure of total ozone itself. Numerical models underestimate the observed trend in midlatitude total ozone, with models predicting only half of the observed decrease. Dr. Salby and his colleagues believe the discrepancy may stem from sources of interannual variability not currently accounted for in model simulations. Accordingly, Dr. Salby and colleagues will explore interannual variations of ozone in relation to variations of tropospheric structure. Following preliminary results from a pilot study, they will composite interannual variations of stratospheric chemical and dynamical structure. Interannual variations of tropospheric structure composited in a similar fashion will then be used to drive numerical integrations in an investigation of how stratospheric changes depend on changes in planetary wave activity and other tropospheric features influencing ozone.