Spatial reconstruction of semi-quantitative precipitation fields over Africa during the nineteenth century from documentary evidence and gauge data |
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Authors: | Sharon E Nicholson Douglas Klotter Amin K Dezfuli |
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Institution: | Earth, Ocean and Atmospheric Science Department, Florida State University, Tallahassee, FL 32306, USA |
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Abstract: | The article presents a newly created precipitation data set for the African continent and describes the methodology used in its creation. It is based on a combination of proxy data and rain gauge records. The data set is semi-quantitative, with a “wetness” index of ? 3 to + 3 to describe the quality of the rainy season. It covers the period AD 1801 to 1900 and includes data for 90 geographical regions of the continent. The results underscore a multi-decadal period of aridity early in the nineteenth century. |
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