Balloon-borne limb profiling of UV/vis skylight radiances, O3, NO2, and BrO: technical set-up and validation of the method

[摘要] A novel light-weight, elevation scanning and absolutely calibratedUV/vis spectrometer and its application to balloon-borne limbradiance and trace gas profile measurements is described. Itsperformance and the novel method of balloon-borne UV/vis limb tracegas measurements has been tested against simultaneous observationsof the same atmospheric parameters available from either (a) in-situinstrumentation (cf., by an electrochemical cell (ECC) ozone sondealso deployed aboard the gondola) or (b) trace gas profiles inferredfrom UV/vis/near IR solar occultation measurements performed on thesame payload. The novel technique is also cross validated withradiative transfer modeling. Reasonable agreement is found (a)between measured and simulated limb radiances and (b) inferred limbO₃, NO₂, and BrO and correlative profilemeasurements when properly accounting for all relevant atmosphericparameters (temperature, pressure, aerosol extinction, and majorabsorbers).

[学科分类] 大气科学