Validation of tracer measurements by the Envisat chemistry instruments my means of in situ observations from balloon and aircraft

Physics

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Satellite Validation

Scientific paper

We present first comparisons of stratospheric N2O and CH4 mixing ratios at mid-latitudes derived from limb scans of the MIPAS-E instrument on the ENVISAT satellite with near-coincident measuremnts made with the balloon-borne cryosampler (BONBON) and the High Altitude Gas Analyzer (HAGAR) on board the M-55 Geophysica aircraft. All validation observations are referenced to internationally accepted calibration scales. The MIPAS-E CH4 and N2O data show much larger scatter than the HAGAR and BONBON in situ observations. The methane mixing ratios derived from MIPAS-E mostly have a high bias below 25 km, whereas the N2O data mostly show agreement within about 15%.

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