An improved technique for global solar radiation estimation using numerical weather prediction

M. A. Shamim*, R. Remesan, M. Bray, D. Han

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

27 Citations (Scopus)


Global solar radiation is the driving force in hydrological cycle especially for evapotranspiration (ET) and is quite infrequently measured. This has led to the reliance on indirect techniques of estimation for data scarce regions. This study presents an improved technique that uses information from a numerical weather prediction (NWP) model (National Centre for Atmospheric Research NCAR's Mesoscale Meteorological model version 5 MM5), for the determination of a cloud cover index (CI), a major factor in the attenuation of the incident solar radiation. The cloud cover index (CI) together with the atmospheric transmission factor (K<inf>T</inf>) and output from a global clear sky solar radiation were then used for the estimation of global solar radiation for the Brue catchment located in the southwest of England. The results clearly show an improvement in the estimated global solar radiation in comparison to the prevailing approaches.

Original languageEnglish
Pages (from-to)13-22
Number of pages10
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Publication statusPublished - 1 Jul 2015


  • Aerosol scattering
  • Atmospheric transmissivity
  • Clear sky radiation
  • Cloud cover
  • Diffuse radiation
  • Global solar radiation
  • Numerical weather model MM5
  • Sunshine
  • Upper atmospheric information

Fingerprint Dive into the research topics of 'An improved technique for global solar radiation estimation using numerical weather prediction'. Together they form a unique fingerprint.

  • Cite this