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: 5454795
• 负责人: Professorin Dr. May-Britt Kallenrode
• 金额: --
• 依托单位: Präsidium
• 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 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5454795?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 simulations will concern the influence of solar variability on different timescales and the coupling phenomena in the atmosphere related to these timescales. Within the first two years of this project it is planned to study in more detail 1) the influence of the 11-year sun spot cycle and its interactions with the quasi-biennial and semi-annual oscillations in the stratosphere and mesosphere, 2) the influence of the 27-day solar rotational variation and its interactions with atmospheric waves, and 3) the influence of precipitating particle events and the role of ions in the response to solar variability. These issues are strongly linked. However, to understand the individual processes, they will be studied separately in the first phase of the project. Simulations will be performed with the HAMMONIA general circulation and chemistry model of the MPI for Meteorology. HAMMONIA is one of three 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 expected to be strongest above the stratopause (50 km) and where the open questions concern in particular up- and downward coupling processes in the atmosphere.

该项目的目标是通过使用整个大气的大气环流和化学模型来提高我们对地球S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所观察到的气候趋势的自然和人为原因。模拟将涉及太阳变化对不同时间尺度的影响，以及与这些时间尺度有关的大气中的耦合现象。在这个项目的头两年内，计划更详细地研究：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和半年振荡的相互作用；2)太阳自转27天变化的影响及其与大气层波的相互作用；3)降水粒子事件的影响和离子在对太阳可变性的反应中的作用。这些问题是紧密相连的。然而，为了了解个别过程，将在项目的第一阶段单独研究它们。模拟将使用MPI的Hammonia大气环流和化学模式进行。Hammonia是世界上综合处理整个大气(长达250公里)的动力学、辐射和化学的三个模型之一。因此，它是一个非常适合研究太阳可变性影响的工具，太阳可变性的影响预计在平流层顶(50公里)以上最强，而且尚待解决的问题尤其涉及大气中的上下耦合过程。