Upper Tropospheric and Stratospheric Measurements of Atmospheric Chemistry and Trends by the Atmospheric Chemistry Experiment (ACE) Fourier Transform Spectrometer

The Atmospheric Chemistry Experiment (ACE) solar occultation FTS was launched into a 74° inclined orbit on 12 August 2003 and has been recording 0.02 cm−1 resolution infrared measurements of the free troposphere and the upper atmosphere since its science operations phase began on 21 February 2004. We highlight atmospheric composition and trend studies that have including detections of new species and the measurement of trends for the key climate change-related species CO2 and CH4.