Observation of the 8-micron N2O5 thermal emission feature in the stratosphere

Details Observation of the 8-micron N2O5 thermal emission feature in the stratosphere Observation of the 8-micron N2O5 thermal emission feature in the stratosphere

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apopt..25.1866e&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 25, June 15, 1986, p. 1866-1868.

Physics

Optics

13

Emission Spectra, Infrared Spectrometers, Nitrogen Oxides, Remote Sensing, Stratosphere Radiation, Thermal Emission, Balloon-Borne Instruments, Daytime, Night

Scientific paper

Remote sensing observations of daytime and nighttime stratospheric N2O5 at concentrations of 3.1 ppbv are reported which are consistent with model predictions. The observations were made at altitudes of 30 km using a balloon-borne cooled IR filter spectrometer. Thermal emission spectra from 6.5 to 8.5 microns at 30 km are shown along with the difference between the night and day spectra. From the data, it is concluded that the 8.0 micron feature in the difference spectrum probably arises from a nighttime enhancement of N2O5. If this feature is due entirely to N2O5, the column density of this constituent above 30 km is calculated to be 10.8 x 10 to the 14th molecules/sq cm. A mixing ratio of N2O5 of 3.1 ppbv at 35 km and two hours before sunrise is inferred.

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