The fourth North American Intercomparison of Ultraviolet Monitoring Spectroradiometers was held September 15 to 25, 1997 at Table Mountain outside of Boulder, Colorado, USA. Concern over stratospheric ozone depletion has prompted several government agencies in North America to establish networks of spectroradiometers for monitoring solar ultraviolet irradiance at the surface of the Earth. The m...

Chapter 2 provides an overview of solar irradiances, the dominant energy input driving Earth’s climate. The uninterrupted 33-year long total solar irradiance (TSI) record from space-borne instruments requires sufficient stability for climate-quality studies, helping determine the global and regional sensitivities of Earth’s climate to solar variability. New instrument calibration capabilities h...

The potential role of solar variations in modulating recent climate has been debated for many decades and recent papers suggest that solar forcing may be less than previously believed. Because solar variability before the satellite period must be scaled from proxy data, large uncertainty exists about phase and magnitude of the forcing. We used a coupled climate system model to determine whether...

Solar surface radiation data of high quality is essential for the appropriate monitoring and analysis of the Earth’s radiation budget and the climate system. Further, they are crucial for the efficient planning and operation of solar energy systems. However, well maintained surface measurements are rare in many regions of the world and over the oceans. There, satellite derived information is th...

Form for the 2012 SORCE Science Meeting – Annapolis, MD, Sept. 18-19 Models of Spectral Irradiance Variability Origins in the solar atmosphere and impacts on Earth’s atmosphere Session Themes (identify your preference if you have a preference): _____ 1. Modeling of the solar atmosphere with emphasis on spectral irradiance _____ 2. Modeling of the solar influence on Earth climate _____ 3. Observ...

Prediction of solar irradiance has great significance to photovoltaic power forecasting and the scheduling plan of power generation. Aim at unsatisfactory prediction accuracy of traditional forecasting methods, this paper presents an approach to predict solar irradiance of photovoltaic power station based on wavelet decomposition and extreme learning machine. With historical irradiance sequence...

In this paper, forecasting models were constructed to estimate surface solar radiation on an hourly basis and the solar irradiance received by solar panels at different tilt angles, to enhance the capability of photovoltaic systems by estimating the amount of electricity they generate, thereby improving the reliability of the power they supply. The study site was Tainan in southern Taiwan, whic...

A very important factor in the assessment of solar energy resources is the availability of direct irradiance data of high quality. However, this component of solar radiation is seldom measured and thus must be estimated from data of global solar irradiance, which is registered in most radiometric stations. In recent years, artificial neural networks (ANN) have shown to be a powerful tool for ma...

Evaluating the performance of photovoltaic cells, modules, and arrays that form large solar deployments relies on accurate measurements of the available solar resource. Therefore, determining the accuracy of these solar radiation measurements provides a better understanding of investment risks. This becomes especially important as deployment size and investment costs grow to hundreds of million...

Cloud impacts on the transfer of Ultraviolet (UV) radiation through the atmosphere can be assessed using a cloud modification factor (CMF). The total global solar irradiation has proven to be a solid basis to derive CMF’s for the UV radiation (UV CMF). Total global irradiance is frequently measured and forecasted by numerical weather predic5 tion systems. Its advantage compared to for instance ...