Infrared absorption cross sections for ethane have been measured in the 3μm spectral region from spectra recorded using a high-resolution FTIR spectrometer (Bruker IFS 125/HR). Results are presented for pure ethane gas from spectra recorded at 0.004cm−1 resolution and for mixtures with dry synthetic air from spectra obtained at 0.015cm−1 resolution (calculated as 0.9/MOPD using the Bruker definition of resolution), at a number of temperatures and pressures appropriate for atmospheric conditions. Intensities were calibrated using three ethane spectra (recorded at 278, 293, and 323K) taken from the Pacific Northwest National Laboratory (PNNL) IR database.