The atmospheric recycling of water is a very important phenomenon on the globe because it not only refreshes the water but it also redistributes it over land and oceans/rivers/lakes throughout the globe. This is made possible by the solar energy intercepted by the Earth. The half of the globe facing the Sun, on the average, intercepts1 J of solar radiation per second and it is divided over various channels as given in Table 1. It keeps our planet warm and maintains its average temperature2 of 288 K with the help of the atmosphere in such a way that life can survive. It also recycles the water in the oceans/rivers/ lakes by initial evaporation and subsequent precipitation; the average annual rainfall over the globe is around one meter. According to M. King Hubbert1 the amount of solar power going into the evaporation and precipitation channel is W. Students can verify the value of average annual rainfall over the globe by utilizing this part of solar energy. This activity is described in the next section.
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December 2013
PAPERS|
December 01 2013
Average Annual Rainfall Over the Globe
D. C. Agrawal
D. C. Agrawal
Banaras Hindu University
, Varanasi 221005, India
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Phys. Teach. 51, 540–541 (2013)
Citation
D. C. Agrawal; Average Annual Rainfall Over the Globe. Phys. Teach. 1 December 2013; 51 (9): 540–541. https://doi.org/10.1119/1.4830066
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