Campbell stokes recorder how does it work

The sunshine recorder was invented by no scientist, but a renowned Scottish author and scholar, John Francis Campbell, in Similar unexpected combustion occurred near glasses of water, bottles, a knot in a window pane, or a bowl of goldfish.

Exactly what inspired an author of Celtic folklore to dabble in meteorology is a mystery, but John Francis Campbell was determined to build a device that could record the intensity of sunlight over the course of a day. Campbell couldn't get hold of a glass sphere, but he did found a hollow glass globe which he filled with water and turned it into a lens. He mounted the globe a few inches over an wooden bowl so that a concentrated beam of sunlight fell on the wood.

As the sun moved across the sky, the beam scorched a path across the wood. Firstly, the lower irradiance at sunset and sunrise sometimes meant the card was not fully burned.

On days with patchy sunshine, the card reader has to make interpretations. These interpretations could cause great discrepancies in the sunshine duration. Nowadays, sunshine duration sensors like the Kipp and Zonen CSD 3 are commonly used along with pyranometers and pyrheliometers.

These provide extremely accurate data, with which sunshine duration calculations can be made. Campbell-Stokes Recorder measuring sunshine duration in Myanmar. Notice the burning of the blue strip on the left of the ball. Photo by Arthur Ogleznev on Unsplash. An old lady is nearing the end of her days and she longs to be with the husband she has lost.

So, when death pays her a visit on nigh The answer that South African far In front of you, scat Image Credit Flickr User psd Nine miles off the coast of County Kerry in the west of Ireland there are two small rocky islands peeking out Yet this That is what the name of it is.

And when you've got it, you want The Sky Blue Mushroom. It looks like it could be something offered to Alice just before she makes a journey in to Wonderland but this sky blue mushroom is not a pr Do you remember the story of the scorpion and the fox?

Campbell-Stokes recorder. Sunshine recorders are sometimes called "heliographs," but this can lead to confusion with the signaling devices of the same name, which are unrelated. Later improved in by Sir George Gabriel Stokes In modern times, light intensity is more often measured with photodiodes and computer recording.