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Natural and anthropogenic contributions to the hurricane drought of the 1970s–1980s

Earth Sciences

Natural and anthropogenic contributions to the hurricane drought of the 1970s–1980s

R. Rousseau-rizzi and K. Emanuel

Discover how the radiative effects of sulfate aerosols influenced Atlantic hurricane activity during a significant lull in the 1970s and 1980s. This groundbreaking research by Raphaël Rousseau-Rizzi and Kerry Emanuel reveals the connections between dust emissions, sea-surface temperatures, and hurricane formation.

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Playback language: English
Abstract
Atlantic hurricane activity experienced a pronounced lull during the 1970s and 1980s. The authors propose that the radiative effects of sulfate aerosols from Europe and North America decreased precipitation in the Sahara-Sahel region, leading to increased dust emissions and transport over the Atlantic. This dust further depressed sea-surface temperatures and hurricane activity. The study shows that dust emissions peaked with sulfate aerosol optical thickness and Sahel drought conditions, and dust optical depth variations alone can explain nearly half of the sea-surface temperature depression during this period.
Publisher
Nature Communications
Published On
Aug 29, 2022
Authors
Raphaël Rousseau-Rizzi, Kerry Emanuel
Tags
Atlantic hurricanes
sulfate aerosols
dust emissions
sea-surface temperatures
Sahara-Sahel
climate impact
hurricane activity

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