Here Comes the Rain Again

What a wonderful post.

Science Matters

In climate discussions, someone is bound to say: Climate is a lot more than temperatures. And of course, they are right. So let’s consider the other major determinant of climate, precipitation.

The global story on rain is straightforward:

“Precipitation is a major component of the water cycle, and is responsible for depositing the fresh water on the planet. Approximately 505,000 cubic kilometres (121,000 cu mi) of water falls as precipitation each year; 398,000 cubic kilometres (95,000 cu mi) of it over the oceans. Given the Earth’s surface area, that means the globally averaged annual precipitation is 990 millimetres (39 in). Climate classification systems such as the Köppen climate classification system use average annual rainfall to help differentiate between differing climate regimes.

http://en.wikipedia.org/wiki/Precipitation_(meteorology)

Globally, average precipitation can vary from +/-5% yearly, but there is no particular trend in the history of observations. But rain is one of those things where averages don’t…

View original post 1,345 more words

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