New treatment of strongly anisotropic scattering phase functions: The delta-M+ method

Zhenyi Lin, Nan Chen, Yongzhen Fan, Wei Li, Knut Stamnes, Snorre Stamnes

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The treatment of strongly anisotropic scattering phase functions is still a challenge for accurate radiance computations. The new delta-M+ method resolves this problem by introducing a reliable, fast, accurate, and easy-to-use Legendre expansion of the scattering phase function with modified moments. Delta-M+ is an upgrade of the widely used delta-M method that truncates the forward scattering peak with a Dirac delta function, where the "+" symbol indicates that it essentially matches moments beyond the first M terms. Compared with the original delta-M method, delta-M+ has the same computational efficiency, but for radiance computations, the accuracy and stability have been increased dramatically.

Original languageEnglish
Pages (from-to)327-336
Number of pages10
JournalJournal of the Atmospheric Sciences
Volume75
Issue number1
DOIs
StatePublished - 1 Jan 2018

Keywords

  • Radiative transfer
  • Remote sensing

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