Climate Change

Climate change has influenced global drought risk for ‘more than a century’

Once filled with water, the Aculeo Lagoon in Chile is now a dry wasteland. Image: REUTERS/Rodrigo Garrido

Daisy Dunne

Science Writer, Carbon Brief

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Climate Change

 The strength of the relationship between PDSI estimates from observational data – tree-ring reconstructions (green) and meteorological datasets (CRU, dark blue; DAI, light blue) – and a climate change “fingerprint”. On the y-axis, a number above zero indicates a positive trend, while numbers below zero indicate a negative trend. Results are shown for three time periods: 1900-49 (top), 1950-75 (middle) and 1980-2017 (bottom). On bottom chart, tree ring reconstructions are replaced with modern surface (orange) and plant root (red) soil moisture datasets.
The strength of the relationship between PDSI estimates from observational data – tree-ring reconstructions (green) and meteorological datasets (CRU, dark blue; DAI, light blue) – and a climate change “fingerprint”. On the y-axis, a number above zero indicates a positive trend, while numbers below zero indicate a negative trend. Results are shown for three time periods: 1900-49 (top), 1950-75 (middle) and 1980-2017 (bottom). On bottom chart, tree ring reconstructions are replaced with modern surface (orange) and plant root (red) soil moisture datasets. Image: Marvel et al. (2019)
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