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In southern Africa, the Okavango Delta

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region experienced a huge increase in stored freshwater 

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during the period of the GRACE mission. The science team analyzed precipitation data 

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for the area and found that it was caused by a pronounced increase in rainfall. 

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Between 2004 and 2012, 

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the region saw about 15% more annual rainfall than during the previous

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twenty-five years. The rain ended a regional drought, and replenished 

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water storage in the area.