Weather in Space

The Sun

What type of pyranometer does the National Weather Service use?

Instead of the Campbell-Stokes recorder, the NWS uses a device called the Marvin sunshine recorder. A more elaborate device, it consists of one clear and one blackened bulb connected by a thin glass tube partly filled with mercury. As sunlight warms the blackened bulb more than the clear one, the mercury expands and shorts out an electrical contract that then operates a pen that marks a chronograph.


This is a web preview of the "The Handy Weather Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App