Acetone and Peroxyacetyl Nitrate in the Upper Troposphere: MIPAS Satellite Retrievals and 3D Model Studies

地球大气层对地球的健康，特别是对人类的福祉有着根本性的影响。这些影响既通过近地表大气中污染物的存在直接产生，也通过气候变化的影响间接产生。事实上，污染物、大气中的天然气和目前造成气候变化的人为温室气体之间存在着明确的联系。这些联系通过化学反应发生，因此称为“气候-化学相互作用”。有机化合物是生命的标志，是大气化学的重要组成部分之一，但其全球模型仍存在很大的不确定性。该项目将使用最新的卫星数据，首次提供全球两种关键有机化合物的测量结果：丙酮和过氧乙酰硝酸酯。然后将这些测量结果与经过验证的全球化学模型进行比较，以调查模型和观测结果的一致性。其结果将是大大减少能够预测未来气候影响和污染物、天然气和气候变量趋势影响的模型所固有的不确定性。

The Earth's atmosphere has a fundamental influence on the health of the planet, and in particular on the wellbeing of humans. These effects occur both directly through the presence of pollutants in the near-surface atmosphere but also indirectly through the effects of climate change. Indeed, there are definite links between pollutants, the natural gases present in the atmosphere and the anthropogenic (human-induced) greenhouse gases which currently force climate change. These links occur via chemical reactions hence the term 'climate-chemistry interactions'. Organic compounds, the signs of life, are one of the important components of atmospheric chemistry but there are still large uncertainties concerning their global modelling. This project will use the latest satellite data to provide, for the first time, measurements of two key organic compounds globally: acetone and peroxyacetyl nitrate (PAN). These measurements will then be compared with a proven global chemistry model to investigate the consistency of the model and observations. The result will be an essential reduction in the uncertainties inherent in models which can predict the future effects of climate and the effects of trends in pollutants, natural gases and climate variables.