4 ms·
Here's some context of what the consensus science says about drought: https://wg1.ipcc.ch/presentations/Sbsta_drought.pdf https://wg1.ipcc.ch/presentations/Sbs
by barney54 7y ago
Here's some context of what the consensus science says about drought: https://wg1.ipcc.ch/presentations/Sbsta_drought.pdf https://wg1.ipcc.ch/presentations/Sbsta_drought.pdf
• Low confidence in an observed global-scale trend in drought or dryness (lack of rainfall) since the 1950s, due to lack of direct observations, methodological uncertainties and choice and geographical inconsistencies in the trends;
• High confidence that the frequency and intensity of drought since 1950 have likely increased in the Mediterranean and West Africa (although 1970s Sahel drought dominates the trend) and likely decreased in central North America and northwest Australia;
• Low confidence in attributing changes in drought over global land areas since the mid-20th century to human influence owing to observational uncertainties and difficulties in distinguishing decadal-scale variability in drought from long-term trends;
• High confidence for droughts during the last millennium of greater magnitude and longer duration than those observed since the beginning of the 20th century in many regions.