Publication Abstracts

Ma et al. 2010

Ma, Q., R.H. Tipping, and R.R. Gamache, 2010: Uncertainties associated with theoretically calculated N2-broadened half-widths of H2O lines. Molec. Phys., 108, 2225-2252, doi:10.1080/00268976.2010.505209.

With different choices of the cut-offs used in the theoretical calculations, we have carried out extensive numerical calculations of the N2-broadend Lorentzian half-widths of the H2O lines using the modified Robert-Bonamy formalism. Based on these results, we are able to thoroughly check the convergence. We find that with low-order cut-offs commonly used in the literature, one is able to obtain converged values only for lines with large half-widths. Conversely, for lines with small half-widths much higher cut-offs are necessary to guarantee the convergence. We also analyze uncertainties associated with calculated half-widths, and these are correlated as above. In general, the smaller the half-widths are, the poorer the convergence and the larger the uncertainty associated with them. For convenience, one can divide all H2O lines into three categories: large, intermediate, and small according to their half-width values. One can use this division to judge whether the calculated half-widths are converged or not, based on the cut-offs used, and also to estimate how large their uncertainties are. We conclude that with the current Robert-Bonamy formalism for lines in category 1, one can achieve the accuracy requirement set by HITRAN while for lines in category 3, it is impossible to meet this goal.

Export citation: [ BibTeX ] [ RIS ]

BibTeX Citation

  author={Ma, Q. and Tipping, R. H. and Gamache, R. R.},
  title={Uncertainties associated with theoretically calculated N2-broadened half-widths of H2O lines},
  journal={Molec. Phys.},

[ Close ]

RIS Citation

ID  - ma05700m
AU  - Ma, Q.
AU  - Tipping, R. H.
AU  - Gamache, R. R.
PY  - 2010
TI  - Uncertainties associated with theoretically calculated N2-broadened half-widths of H2O lines
JA  - Molec. Phys.
VL  - 108
SP  - 2225
EP  - 2252
DO  - 10.1080/00268976.2010.505209
ER  -

[ Close ]

• Return to 2010 Publications

• Return to Publications Homepage