Magazine article Geographical

Wet Lands

Magazine article Geographical

Wet Lands

Article excerpt

Where does the Earth's rain fall? This question can nowadays be answered remarkably well because precipitation figures are part of possibly the most advanced global scientific data that is currently available in geosciences. Climate science is based on such accurate and reliable models. Maps about the global distribution of precipitation are also part of our basic understanding of the geography of the world. Climate observations from the past decades (such as those included in the WorldClim database used in this visualisation) provide information about the average monthly precipitation. This was used as a basis for a gridded cartogram transformation of the land surface in which each grid cell is resized according to the total amount of rain (and other precipitation) in that area. The main map shows the accumulated average annual precipitation patterns across the globe over the past five decades. In addition, a smaller series of cartograms visualises the average monthly variations over the same period. …

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