Toward Improved Solar Irradiance Forecasts: a Simulation of Deep Planetary Boundary Layer with Scattered Clouds Using the Weather Research and Forecasting Model

Chang Ki Kim, Michael Leuthold, William F. Holmgren, Alexander D Cronin, Eric Betterton

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Accurate forecasts of solar irradiance are required for electric utilities to economically integrate substantial amounts of solar power into their power generation portfolios. A common failing of numerical weather models is the prediction of scattered clouds at the top of deep PBL which are generally difficult to be resolved due to complicated processes in the planetary boundary layer. We improved turbulence parameterization for better predicting solar irradiance during the scattered clouds’ events using the Weather Research and Forecasting model. Sensitivity tests show that increasing the exchange coefficient leads to enhanced vertical mixing and a deeper mixed layer. At the top of mixed layer, an adiabatically ascending air parcel achieved the water vapor saturation and finally scattered cloud is generated.

Original languageEnglish (US)
Pages (from-to)637-655
Number of pages19
JournalPure and Applied Geophysics
Volume173
Issue number2
DOIs
StatePublished - Feb 1 2016

Fingerprint

planetary boundary layer
irradiance
weather
forecasting
Boundary layers
boundary layer
mixed layer
Electric utilities
Steam
Parameterization
Solar energy
Power generation
simulation
Turbulence
solar power
vertical mixing
parameterization
power generation
water vapor
Air

Keywords

  • exchange coefficient
  • scattered clouds
  • Solar irradiance
  • turbulence
  • Weather Research and Forecasting model

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Toward Improved Solar Irradiance Forecasts : a Simulation of Deep Planetary Boundary Layer with Scattered Clouds Using the Weather Research and Forecasting Model. / Kim, Chang Ki; Leuthold, Michael; Holmgren, William F.; Cronin, Alexander D; Betterton, Eric.

In: Pure and Applied Geophysics, Vol. 173, No. 2, 01.02.2016, p. 637-655.

Research output: Contribution to journalArticle

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