The concept of quasi-correlated absorption spectra and its application in atmospheric remote sensing
Abstract
The novel concept of quasi-correlated gas absorption spectra is introduced in this work for modeling radiative transfer in non-uniform gaseous paths. The quasi-correlation assumption is proposed as a generalization of the commonly used concept of correlated spectra and is developed to extend the limits in accuracy that are inherent in the correlated spectrum assumption. It is defined using the previously introduced Spectral Gamma Function, which characterizes the correlation between gas absorption spectra at different thermodynamic states. An application of the quasi-correlation concept is presented in several atmospheric remote sensing scenarios for calculating band-averaged transmissivities of non-uniform paths. Using the same number of gray gas intervals, the quasi-correlated approach significantly improves the accuracy of k-distribution methods in radiative transfer calculations for non-uniform paths, compared to the traditional correlated k-distribution (CKD) method.
Related
- Separation of Source, Site, and Path Effects Based on Elastic Radiative Transfer Theory. Part 1: Mapping of Scattering and Absorption Properties and Application to Metropolitan France
- Meso-NH-ISO v1.0: a water stable isotopologue scheme in the non-hydrostatic mesoscale atmospheric model Meso-NH – application to a 2D West African squall line
- Ice-thickness based scaling of wave attenuation in sea ice: Application and assessment of wave spectra
- Explaining patterns learned by neural networks for detection of atmospheric surface fronts in gridded atmospheric data
- Recent armed conflict disrupts atmospheric climate monitoring
BibTeX
@article{andre2026concept,
title = {{The concept of quasi-correlated absorption spectra and its application in atmospheric remote sensing}},
author = {Frédéric André and Vladimir Solovjov and Brent Webb and Nada Mourtaday and Phillippe Dubuisson},
journal = {Journal of Quantitative Spectroscopy and Radiative Transfer},
year = {2026},
month = oct,
doi = {10.1016/j.jqsrt.2026.110035},
url = {https://hal.science/hal-05805146v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - The concept of quasi-correlated absorption spectra and its application in atmospheric remote sensing
AU - Frédéric André
AU - Vladimir Solovjov
AU - Brent Webb
AU - Nada Mourtaday
AU - Phillippe Dubuisson
PY - 2026
DA - 2026/10/26
JO - Journal of Quantitative Spectroscopy and Radiative Transfer
DO - 10.1016/j.jqsrt.2026.110035
UR - https://hal.science/hal-05805146v1
AB - The novel concept of quasi-correlated gas absorption spectra is introduced in this work for modeling radiative transfer in non-uniform gaseous paths. The quasi-correlation assumption is proposed as a generalization of the commonly used concept of correlated spectra and is developed to extend the limits in accuracy that are inherent in the correlated spectrum assumption. It is defined using the previously introduced Spectral Gamma Function, which characterizes the correlation between gas absorption spectra at different thermodynamic states. An application of the quasi-correlation concept is presented in several atmospheric remote sensing scenarios for calculating band-averaged transmissivities of non-uniform paths. Using the same number of gray gas intervals, the quasi-correlated approach significantly improves the accuracy of k-distribution methods in radiative transfer calculations for non-uniform paths, compared to the traditional correlated k-distribution (CKD) method.
SN - 0022-4073
SN - 1879-1352
ER -