Observations of aerosol by the HALOE experiment onboard UARS - A preliminary validation

Details Observations of aerosol by the HALOE experiment onboard UARS - A preliminary validation Observations of aerosol by the HALOE experiment onboard UARS - A preliminary validation

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1291h&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 12, p. 1291-1294.

Physics

30

Aerosols, Atmospheric Composition, Extinction, Halogen Occultation Experiment, Infrared Radiometers, Upper Atmosphere Research Satellite (Uars), Hydrochloric Acid, Hydrofluoric Acid, Methane, Nitric Oxide, Vertical Distribution

Scientific paper

The HALOE experiment measures vertical profiles of aerosol extinction at five infrared wavelengths. Four of these observations are obtained using a combination of gas filter and broadband radiometer measurements in bands of HF, HCl, CH4, and NO centered at wavelengths of 2.45, 3.40, 3.45, and 5.26 microns, respectively. The fifth is obtained using broadband radiometer measurements of CO2 transmission at 2.79 microns. Error analysis shows that the random extinction uncertainties are generally less than 10 percent in the aerosol layer, increasing to over 20 percent at the profile tops. HALOE spectral extinction measurements are shown to be consistent with predicted spectral extinction for stratospheric sulfate aerosol. Profile comparisons between HALOE and independent sources result in generally good agreement in the shape and magnitude of peak extinction and the altitude where the peak extinction occurs. In addition, global aerosol distributions obtained from the data are consistent with expected aerosol morphology. Although the validation is preliminary, the HALOE aerosol data appear to be of excellent quality and to accurately represent optical characteristics and distribution of the aerosols.

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