About the Radiation Stations

Radiation Measurements in Fairbanks

We have carried out radiation measurements on the roof of the Geophysical Institute, University of Alaska, Fairbanks. Gathering these measurements is more complex than other meteorological parameters (e.g. temperature), but we now have sufficient confidence in the quality of our measurements, to put daily and monthly data on our website, starting from 1 April 2012. We are measuring the following parameters: Click on month to view daily data
1. Global radiation (direct plus diffuse) on a horizontal surface. It is the most commonly measured value and is the amount of solar radiation the Earth's surface receives at a given location. We used an Eppley PSP (Precision Spectral Pyranometer), covered with a double glass dome with a transparency between 285-2800 nm. April 2012 May 2012 June 2012 July 2012 August 2012

2. The global radiation received on a south facing slope inclined to 65. This represents the generally accepted orientation of a fixed plate solar collector for 65 latitude for maximum annual collection. A Lambda Cell, a photovoltaic device, was used as instrument.

3. The global radiation on a south wall, same instrument as for the south slope. It gives summarized over the year less output than the south slope, however, in winter when solar angles are low, it gives a higher amount, while in summer the amount is reduced. Furthermore, no snow is normally collected on such an exposure.

April 2012 Inclined May 2012 Inclined June 2012 Inclined July 2012 Inclined August 2012 Inclined
April 2012 Vertical May 2012 Vertical June 2012 Vertical July 2012 Vertical August 2012 Vertical
4. The infrared radiation was measured with an Eppley PIR instrument. We receive energy at the Earth'e surface from the sun in the short wavelength bands, but lose it in the infrared. Hence, most of the time these fluxes are negative. April 2012 May 2012 June 2012 July 2012 August 2012