Measurement and Validation of Hydrochlorofluorocarbon-22 from the Mipas Instrument
نویسندگان
چکیده
Our retrievals of HCFC-22 vertical profiles volume mixing ratios (vmrs) from MIPAS-E spectral data are presented. Using a retrieval scheme developed at the University of Leicester we have detected a mean global enhancement of HCFC-22 vmrs compared to 1998 values. Latitudinal variations of HCFC-22 concentrations are also detected. A preliminary validation of our HCFC-22 retrievals is presented with respect to global mean behaviour, examined using the technique of tracer-tracer correlation with operationally retrieved N2O (version 4.57). We find a compact relationship (r > 0.8) in our global tracer-tracer plots. From the linear fits applied to our retrieved HCFC-22 data and MIPAS-E N2O, we find a sharper gradient in Northern Hemisphere measurements compared to the Southern Hemisphere.
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