A Surface Solar Radiation Model for Cloudy Atmospheres

Atwater, Marshall A.; Ball, J. Timothy

doi:10.1175/1520-0493(1981)109<0878:assrmf>2.0.co;2

Cited by 60 publications

(21 citation statements)

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“…This model uses precipitable water, pressure, ground albedo, sky albedo, air mass, and broadband aerosol optical depth to model the transmittance impacts of aerosols and water vapor [26,27]. This model can also be used to estimate the irradiance with cloud cover [28].…”

Section: Complex Models For Determining the Global Horizontal Irradiamentioning

confidence: 99%

Global horizontal irradiance clear sky models : implementation and analysis.

Stein¹,

Hansen²,

Reno³

2012

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Clear sky models estimate the terrestrial solar radiation under a cloudless sky as a function of the solar elevation angle, site altitude, aerosol concentration, water vapor, and various atmospheric conditions. This report provides an overview of a number of global horizontal irradiance (GHI) clear sky models from very simple to complex. Validation of clear-sky models requires comparison of model results to measured irradiance during clear-sky periods. To facilitate validation, we present a new algorithm for automatically identifying clear-sky periods in a time series of GHI measurements. We evaluate the performance of selected clear-sky models using measured data from 30 different sites, totaling about 300 site-years of data. We analyze the variation of these errors across time and location. In terms of error averaged over all locations and times, we found that complex models that correctly account for all the atmospheric parameters are slightly more accurate than other models, but, primarily at low elevations, comparable accuracy can be obtained from some simpler models. However, simpler models often exhibit errors that vary with time of day and season, whereas the errors for complex models vary less over time.4

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Section: Complex Models For Determining the Global Horizontal Irradiamentioning

confidence: 99%

Global horizontal irradiance clear sky models : implementation and analysis.

Stein¹,

Hansen²,

Reno³

2012

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“…Literature values for a variety of land covers compiled from a number of sources are listed in Table 12. Atwater and Ball (1981); and i Eagleson (1970).…”

Section: Land Surface Albedomentioning

confidence: 99%

Gridded Surface Subsurface Hydrologic Analysis (GSSHA) User's Manual; Version 1.43 for Watershed Modeling System 6.1

Downer¹,

Ogden²

2006

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Abstract:The need to simulate surface water flows in watersheds with diverse runoff production mechanisms has led to the development of the physically-based hydrologic model Gridded Surface Subsurface Hydrologic Analysis (GSSHA). GSSHA is a reformulation and enhancement of the two-dimensional, physically based model CASC2D. The GSSHA model is capable of simulating stream flow generated by a variety of sources, including runoff due to infiltration excess and saturated sources areas and seeps, as well as direct interaction between streams and the saturated groundwater. The model employs mass-conserving solutions of partial differential equations. The hydrologic components are closely linked, assuring an overall mass balance. The model has been applied to a diverse variety of projects and has been proven useful for analysis of hydrologic and sedimentation processes, and can provide information needed for designed systems and the potential effects of projects, land-use change, environmental restoration, best management practices, climate change, and related issues. This manual describes the model formulation, model input, and provides information on the practice of hydrologic modeling with GSSHA, and hydrologic modeling in general.

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“…We investigate how different values of model parameters impact on the kD and POPD, and we evaluate the proposed model by comparing its results with weather conditions in the kD-POPD classes. Figure 3 shows the dependence of kD, POPD and kD-POPD classes on the parameters of the variable weather model given by Equation (4). The values of kD are strongly affected by the changes in the M, a1 and c1 values, while the values of POPD are mainly affected by the changes in the b1 parameter.…”

Section: Numerical Modelling Of Solar Radiationmentioning

confidence: 99%

“…With observed solar radiation data, realistic system simulation and annual gain analysis are possible. Indirect solar energy estimate studies are conducted due to the lack of the actual solar radiation data [4][5][6][7][8]. Those estimations use observed weather variables, such as sunshine [9,10], temperature [11,12] or cloud [11,[13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A Mathematical Model of Hourly Solar Radiation in Varying Weather Conditions for a Dynamic Simulation of the Solar Organic Rankine Cycle

2015

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A mathematical model of hourly solar radiation with weather variability is proposed based on the simple sky model. The model uses a superposition of trigonometric functions with short and long periods. We investigate the effects of the model variables on the clearness (kD) and the probability of persistence (POPD) indices and also evaluate the proposed model for all of the kD-POPD weather classes. A simple solar organic Rankine cycle (SORC) system with thermal storage is simulated using the actual weather conditions, and then, the results are compared with the simulation results using the proposed model and the simple sky model. The simulation results show that the proposed model provides more accurate system operation characteristics than the simple sky model.

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A Surface Solar Radiation Model for Cloudy Atmospheres

Cited by 60 publications

References 0 publications

Global horizontal irradiance clear sky models : implementation and analysis.

Global horizontal irradiance clear sky models : implementation and analysis.

Gridded Surface Subsurface Hydrologic Analysis (GSSHA) User's Manual; Version 1.43 for Watershed Modeling System 6.1

A Mathematical Model of Hourly Solar Radiation in Varying Weather Conditions for a Dynamic Simulation of the Solar Organic Rankine Cycle

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