The Atmospheric Response to Solar Variability: Simulations with a General Circulation and Chemistry Model for the Entire Atmosphere

大气对太阳变化的响应：用整个大气的一般循环和化学模型进行模拟

• 批准号: 5454793
• 负责人: Dr. Hauke Schmidt
• 金额: --
• 依托单位: Max-Planck-Institut für Meteorologie (MPI-M)
• 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 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5454793?language=en
• 关键词: Atmospheric; Response; Solar; Variability; Simulations

The goal of this project is to improve our knowledge on the response of the Earth’s atmosphere to the variable input of the sun from the thermosphere to the surface by using a general circulation and chemistry model for the entire atmosphere. This will help to better constrain natural and anthropogenic causes of the observed climate trends. The numerical model we use is the HAMMONIA general circulation and chemistry model developed at MPI-M. It is one of very few models worldwide that treat dynamics, radiation and chemistry comprehensively for the entire atmosphere (up to 250 km). Therefore, it is a well suited tool for studying effects of solar variability which are in general increasing with altitude and which depend in particular on up- and downward coupling processes in the atmosphere. The simulations concern the influence of solar variability on different timescales and the coupling phenomena in the atmosphere related to these timescales. Within the first two phases of this project we have studied separately 1) the influence of the 11-year sun spot cycle and its interactions with the quasi-biennial oscillation in the stratosphere and mesosphere, 2) the influence of the 27-day solar rotational variation and 3) the influence of precipitating particle events and the role of ions in the response to solar variability. Main issues in the third phase of ARTOS will be a) the relative importance of precipitating particles and radiation variations in different atmospheric height regions during the last about 50 years, and b) the role of ocean-atmosphere interactions in solar-terrestrial coupling.

该项目的目标是通过使用整个大气的一般环流和化学模型，提高我们对地球大气对太阳从热层到地表的可变输入的响应的认识。这将有助于更好地限制观测到的气候趋势的自然和人为原因。我们使用的数值模型是MPI-M开发的HAMMONIA环流和化学模型。它是世界上为数不多的对整个大气（250公里以内）进行动力学、辐射和化学综合处理的模型之一。因此，它是研究太阳变率效应的一个非常合适的工具，太阳变率一般随高度增加而增加，并特别依赖于大气中向上和向下的耦合过程。模拟了太阳变率在不同时间尺度上的影响以及与这些时间尺度相关的大气耦合现象。在该项目的前两个阶段，我们分别研究了1)11年太阳黑子周期的影响及其与平流层和中间层准两年一次振荡的相互作用，2)27天太阳旋转变化的影响，以及3)沉淀粒子事件的影响和离子在响应太阳变率中的作用。ARTOS第三阶段的主要问题是：a)近50年来不同大气高度区域降水粒子和辐射变化的相对重要性；b)海洋-大气相互作用在日地耦合中的作用。