Ultra-violet absorption cross sections of isotopically substituted nitrous oxide species: 14N14NO, 15N14NO, 14N15NO and 15N15NO
Other literature type
Enghoff, M. B.
McLinden, C. A.
Sorensen, S. L.
Johnson, M. S.
(issn: 1680-7324, eissn: 1680-7324)
The isotopically substituted nitrous oxide species <sup>14</sup>N<sup>14</sup>NO, <sup>15</sup>N<sup>14</sup>NO,
<sup>14</sup>N<sup>15</sup>NO and <sup>15</sup>N<sup>15</sup>NO were investigated by
ultra-violet (UV) absorption spectroscopy. High precision cross sections
were obtained for the wavelength range 181 to 218nm at temperatures of 233
and 283K. These data are used to calculate photolytic isotopic
fractionation constants as a function of wavelength. The fractionation
constants were used in a three-dimensional chemical transport model in order
to simulate the actual fractionation of N<sub>2</sub>O in the stratosphere, and
the results were found to be in good agreement with field studies.