UV absorption cross sections of nitrous oxide (N2O) and carbon tetrachloride (CCl4) between 210 and 350 K and the atmospheric implications
Item
Title (Dublin Core)
UV absorption cross sections of nitrous oxide (N2O) and carbon tetrachloride (CCl4) between 210 and 350 K and the atmospheric implications
Description (Dublin Core)
Absorption cross sections of nitrous oxide (N<sub>2</sub>O) and carbon tetrachloride (CCl<sub>4</sub>) are reported at five atomic UV lines (184.95, 202.548, 206.200, 213.857, and 228.8 nm) at temperatures in the range 210–350 K. In addition, UV absorption spectra of CCl<sub>4</sub> are reported between 200–235 nm as a function of temperature (225–350 K). The results from this work are critically compared with results from earlier studies. For N<sub>2</sub>O, the present results are in good agreement with the current JPL recommendation enabling a reduction in the estimated uncertainty in the N<sub>2</sub>O atmospheric photolysis rate. For CCl<sub>4</sub>, the present cross section results are systematically greater than the current recommendation at the reduced temperatures most relevant to stratospheric photolysis. The new cross sections result in a 5–7% increase in the modeled CCl<sub>4</sub> photolysis loss, and a slight decrease in the stratospheric lifetime, from 51 to 50 years, for present day conditions. The corresponding changes in modeled inorganic chlorine and ozone in the stratosphere are quite small. A CCl<sub>4</sub> cross section parameterization for use in atmospheric model calculations is presented.
Creator (Dublin Core)
Rontu Carlon, N.
Papanastasiou, D. K.
Fleming, E. L.
Jackman, C. H.
Newman, P. A.
Burkholder, J. B.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-10-6137-2010
https://acp.copernicus.org/articles/10/6137/2010/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
