Investigations of the solar influence on middle atmospheric water vapour and ozone during the last solar cycle - analysis of the MPS data set

在这个建议中，我们打算分析和解释一组来自林道（51 N，10 E）和ALOMAR（69 N，16 E）地基微波观测的中层大气水汽和臭氧数据。该数据集的独特之处在于它涵盖了整个太阳周期，并提供了对仅在极地地区发生的过程的深入了解。我们要调查是否有一个影响的太阳变率在长时间和短时间尺度上（太阳周期，太阳自转周期，日冕物质抛射，太阳质子事件）的中层大气水蒸气和臭氧，以及以何种方式这些气体之间的相互关系可能会受到影响（或触发）的太阳变率。具体的科学目标是：数据中的水蒸气/臭氧与太阳紫外线辐射之间是否存在任何（反）相关性？对太阳变化的敏感性是否取决于季节，如果是的话，影响有多强？水汽浓度如何影响第三臭氧极大值的振幅和臭氧昼夜比的冬季异常？臭氧化学的温度依赖性如何随着可变的太阳紫外线输入而改变，以及它如何影响臭氧浓度和臭氧分解速率之间的反馈？中层大气臭氧浓度能否成为解释太阳紫外线辐射与平流层突然变暖之间相关性的缺失环节？

In this proposal we intend to analyze and interpret a data set of middle atmospheric water vapour and ozone derived from ground-based microwave observations at Lindau (51 N, 10 E) and ALOMAR (69 N, 16E). The data set is unique in that it covers a full solar cycle and provides insight into processes happening only in the polar area. We want to investigate if there is an influence of solar variability on long and short time scales (solar cycle, solar rotation period, coronal mass ejections, solar proton events) on the middle atmospheric water vapour and ozone and in which way the interrelation between these gases may be influenced (or triggered) by the solar variability. Specific science objectives are: is there any (anti-)correlation between water vapour/ozone and the solar UV radiation in the data? Does the sensitivity on solar variability depend on the season and if so how strong is the influence? How does the water vapour concentration influence the amplitudes of the tertiary ozone maximum and the winter anomaly in the night-to-day ratio of ozone? How does the temperature dependence of ozone chemistry change with variable solar UV input and how does it influence the feedback between the ozone concentration and the ozone dissociation rate? Can the middle atmospheric ozone concentration be the missing link explaining a correlation between solar UV radiation and sudden stratospheric warmings?