The composition of the Earth's atmosphere is changing. The Atmospheric Chemistry Experiment (ACE) satellite measures infrared transmission spectra of the atmosphere using the Sun as a light source. ACE provides a global view of atmospheric composition from altitude composition profiles for 44 molecules starting in February 2004. Altitude-latitude abundance distributions and composition trends for more than 16 years are presented and briefly discussed. The ACE trends provide a quantitative state-of-the-atmosphere report.

中文翻译：

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来自轨道的大气痕量气体的十六年趋势

地球大气的组成正在发生变化。大气化学实验（ACE）卫星使用太阳作为光源来测量大气的红外透射光谱。从2004年2月开始，ACE从44个分子的海拔组成概况中提供了大气组成的全局视图。介绍并简要讨论了超过16年的海拔-纬度丰度分布和组成趋势。ACE趋势提供了定量的大气状况报告。