SPP 1176: Climate and Weather of the Sun-Earth-System (CAWSES)

优先方案的目的是更好地了解太阳对地球大气的影响，时间尺度从几个小时到几个世纪。重点将放在涉及日地系统重要方面的科学问题上。太阳通过吸收辐射和粒子，通过光化学活性痕量气体的产生和修改，以及通过包括潮汐在内的波的产生来影响大气。所涉及的物理和化学过程是通过各种复杂的机制耦合的。虽然太阳总辐射的波动不到0.1%，但太阳对地面大气的影响可能很大，特别是在高层大气中，太阳光谱中高度可变的能量部分被吸收。局部扰动可以通过各种耦合机制分布在很大的垂直和水平距离上。太阳活动的中长期变化及其对陆地大气的影响，对于评估自然过程与人为影响在长期趋势中的重要性也很重要。

The aim of the Priority Programme is a better understanding of the influence of the sun on the terrestrial atmosphere on time scales from hours to centuries. The focus will be on scientific problems which deal with important aspects of the solar terrestrial system. The sun influences the atmosphere through the absorption of radiation and particles, through the generation and modification of photochemically active trace gases, and through the generation of waves, including tides. The physical and chemical processes involved are coupled through various complicated mechanisms. Although the total solar radiation fluctuates by less then 0.1 percent the solar impact on the terrestrial atmosphere can be significant, in particular in the upper atmosphere where the highly variable energetic part of the solar spectrum is absorbed. A local disturbance can be distributed over large vertical and horizontal distances through various coupling mechanisms. The medium and long-term variation of solar activity and its influence on the terrestrial atmosphere is also important to assess the importance of natural processes in long-term trends in comparison with anthropogenic influences.