Middle Atmosphere NOx variations and solar UV VAriability: Examples to study mesospheric/stratospheric coupling and the impact of solar variability on stratospheric ozone

中层大气氮氧化物变化和太阳紫外线变化：研究中层/平流层耦合以及太阳变化对平流层臭氧影响的示例

• 批准号: 5454133
• 负责人: Dr. Thomas Reddmann
• 金额: --
• 依托单位: IMK - Atmosphärische Spurengase und Fernerkundung
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5454133?language=en
• 关键词: Middle; Atmosphere; NOx; variations; solar

A unique record of spectral radiance measurements has been provided by the instrument MIPAS on-board the ENVISAT satellite which covers the lower stratosphere up to the lower mesosphere globally and in particular the polar night regions. The first two years of its operation encompassed phases of varying solar activity including the solar storm in October 2003. From these observations the chemical effects of increased stratospheric NOx values, especially on ozone depletion, and the contribution to the NOy budget has been assessed by comparing MIPAS observations and the results of the KASIMA model. During the third phase of the project the data basis will be extended by providing up to present observations using the reduced resolution mode of the instrument, by filling gaps in the time and spatial coverage of the data, and by adapting and developing retrieval techniques. Using the extended data set the role of solar proton events compared to auroral activity for NOx production and the dependence on the dynamic situation during polar winters ruling downward transport will be analysed for more meteorological, solarphysical and geomagnetical situations using data analysis and model simulations. As a model inter-comparison undertaken during the second funding period showed major deficits in the understanding of the build-up of HNO3 and ClONO2 during SPEs, related NOx, HOx and chlorine chemistry will be studied by detailed observation and model simulations. In close co-operation with other CAWSES partners the project aims to contribute to the improvement of chemical climate models with respect to their capability to simulate natural forcings as solar variability.

仪器MIPA在板载板上已经提供了光谱辐射测量的独特记录，该仪表板卫星卫星覆盖了全球下层平流层的下层平流层，尤其是极性夜间区域。其操作的前两年包括不同的太阳能活动的阶段，包括2003年10月的太阳风暴。从这些观察结果来看，平流层NOX值增加的化学效应，尤其是对臭氧耗竭的化学效应，并且通过比较MIPAS观察结果和Kasima模型的结果来评估NOY预算的贡献。在项目的第三阶段中，将通过使用仪器的分辨率减少模式，通过填补数据的时间和空间覆盖范围，以及调整和开发检索技术来扩展数据基础。使用扩展数据集与NOX生产的极光活动相比，太阳能质子事件的作用以及对极地冬季裁定向下运输的动态状况的依赖性将通过数据分析和模拟模拟进行更多的气象，太阳能物理和地向磁性情况进行分析。作为在第二个资金期间进行的模型间比较，在SPE期间对HNO3和clono2的堆积的理解中显示了主要缺陷，将通过详细的观察和模型模拟来研究相关的NOX，HOX和氯化学。在与其他CAWSES合作伙伴的密切合作中，该项目旨在为化学气候模型的改善而促进其模拟自然强迫作为太阳可变性的能力。

项目成果

Atmospheric effects of energetic particle precipitation in the Arctic winter 1978–1979 revisited

重新审视 1978 年至 1979 年北极冬季高能粒子降水的大气影响

• DOI: 10.1029/2011jd016663
• 发表时间: 2012
• 期刊: Journal of Geophysical Research
• 作者: L. A. Holt;C. E. Randall;V. L. Harvey;E. E. Remsberg;G. P. Stiller;B. Funke;P. F. Bernath;K. A. Walker
• 通讯作者: K. A. Walker