期刊
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
卷 291, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jqsrt.2022.108341
关键词
Spherical atmosphere; Multiple scattering of solar light; Polarization; Validation of radiative transfer software
资金
- NASA [NNX14AP81G, 80NSSC21K1447]
- National Aeronautics and Space Administration [80NM0018D0004]
- NASA [NNX14AP81G, 674898] Funding Source: Federal RePORTER
This paper presents a new VLIDORT-based quasi-spherical vector radiative transfer model (VLIDORT-QS) for forward-model simulations of long-path measurements in spherical-atmosphere configurations. The model accurately treats the single-scatter radiation field in spherical geometry and approximates the diffuse-scatter source terms locally through pseudo-spherical simulations. The model has been validated against a fully-spherical Monte Carlo code and the standard VLIDORT model for nadir-view scenarios.
We present a new VLIDORT-based quasi-spherical vector radiative transfer (RT) model (VLIDORT-QS) that was developed for forward-model simulations of long-path measurements in limb-or nadir-viewing spherical-atmosphere configurations. This paper provides a theoretical description of the RT model, in which the single-scatter radiation field is treated accurately in spherical geometry, while the diffuse -scatter source terms at points along the line-of-sight are approximated locally through pseudo-spherical simulations based on the VLIDORT RT code; these multiple scatter source terms are then folded into the source function integration to yield the radiation field at any line-of-sight observation point in the at-mosphere. In addition, the VLIDORT-QS model has a complete linearization facility (ability to generate analytic Jacobians of the radiation field with respect to any atmospheric or surface property). Validation of the model has been carried out against a fully-spherical Monte Carlo code, and also against the stan-dard VLIDORT model for nadir-view scenarios with relatively low sphericity effects. A sam ple application of VLIDORT-QS for a biomass-burning plume scenario is demonstrated. A second paper will present a de-tailed analysis of the retrieval of ice-cloud properties from high-altitude aircraft measurements taken as part of the NASA Airborne Tropical Tropopause Experiment (ATTREX) campaign, with VLIDORT-QS pro-viding forward-model simulations of the radiation fields and associated Jacobian functions.(c) 2022 Elsevier Ltd. All rights reserved.
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