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Temperature and Pressure Dependence of High-Resolution Air-Broadened Absorption Cross Sections of NO_2(415−525 nm)

Nizkorodov, S. A. and Sander, S. P. and Brown, L. R. (2004) Temperature and Pressure Dependence of High-Resolution Air-Broadened Absorption Cross Sections of NO_2(415−525 nm). Journal of Physical Chemistry A, 108 (22). pp. 4864-4872. ISSN 1089-5639. https://resolver.caltech.edu/CaltechAUTHORS:20170605-071525697

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Abstract

Cross sections of air-broadened NO_2 in the 415−525 nm region are reported. These are retrieved from 21 absorption spectra recorded at 0.060 cm^(-1) resolution with the McMath−Pierce Fourier Transform Spectrometer located on Kitt Peak in Arizona. The measurements are obtained for pressures (1−760 Torr) and temperatures (220−298 K) that are representative of typical tropospheric and stratospheric conditions. Two sigma uncertainty (95% confidence interval ≈ 2σ_(mean)) for the absolute absorption cross sections is below ±7% over the reported wavelength range. The average integrated intensity of all our data is 〈σ〉_(400-500 nm) = 4.53 × 10^(-17) cm^2 nm, which is within 0.2% of the averaged value from the recent literature. The wavelength (referred to vacuum) accuracy is 0.011 cm^(-1) (2.8 × 10^(-4) nm at 500 nm) and precision is 0.0022 cm^(-1) throughout the investigated wavelength range. In agreement with previous observations, high-resolution features in the NO_2 absorption spectrum display a strong pressure dependence with an effective pressure broadening parameter of 0.116 ± 0.003 cm^(-1)/atm (the rate of increase of Lorentzian half width at half-maximum with pressure). Temperature has a relatively minor effect on the shapes of individual high-resolution features, but it exerts a complex dependence on the relative line intensities. Absorption cross sections reported here represent the highest resolution data available over a substantial (>100 nm) wavelength range for quantitative analysis of NO_2 atmospheric column absorption spectra.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/jp049461nDOIArticle
http://pubs.acs.org/doi/full/10.1021/jp049461nPublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/jp049461nPublisherSupporting Information
ORCID:
AuthorORCID
Sander, S. P.0000-0003-1424-3620
Additional Information:© 2004 American Chemical Society. Received 5 February 2004. Published online 8 May 2004. Published in print 1 June 2004. This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This work was supported by the NASA EOS/Aura Validation, Upper Atmosphere Research and Tropospheric Chemistry Programs. S.A.N. thanks the Camille and Henry Dreyfus Foundation for the postdoctoral scholarship. The authors thank M. Dulick for experimental assistance and G. Mount and J. Harder for helpful discussions.
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
Camille and Henry Dreyfus FoundationUNSPECIFIED
Issue or Number:22
Record Number:CaltechAUTHORS:20170605-071525697
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170605-071525697
Official Citation:Temperature and Pressure Dependence of High-Resolution Air-Broadened Absorption Cross Sections of NO2 (415−525 nm) S. A. Nizkorodov, S. P. Sander, and L. R. Brown The Journal of Physical Chemistry A 2004 108 (22), 4864-4872 DOI: 10.1021/jp049461n
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77929
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:06 Jun 2017 18:50
Last Modified:03 Oct 2019 18:03

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