The potential for radiometric retrievals of halocarbon concentrations from the MIPAS-E instrument

摘要: Abstract Halocarbons, such as CFC-11, CFC-12 and HCFC-22, are important trace gases in the atmosphere through their role greenhouse influence on stratospheric ozone chemistry. This paper focuses an initial study using integration of spectral radiance measurements from a spaceborne limb sounding Fourier Transform Spectrometer (FTS) to retrieve these compounds upper troposphere lower stratosphere (UTLS). The instrument employed this is Michelson Interferometer for Passive Atmospheric Sounding onboard ENVISAT (MIPAS-E) which obtains data altitude range 6–68 km at unapodized resolution 0.025 cm−1. We have used optimal estimation techniques vertical information radiometric approach. It shown that significant retrieval obtained up five measured levels UTLS six two HCFC-22. An error analysis indicates sensitivity our retrievals variability operationally retrieved pressure temperature data. For each halocarbon, gain, offset spectroscopic uncertainties generally contribute less than 10% total error. Finally, tracer correlations compare datasets equivalent relationships derived here version 2 ATMOS with very good agreements but more CFC-11 comparisons.