Persistent drying in the tropics linked to natural forcing

Winter, Amos, Zanchettin, Davide, Miller, Thomas, Kushnir, Yochanan, Black, David, Lohmann, Gerrit, Burnett, Allison, Haug, Gerald H., Estrella-Martínez, Juan, Breitenbach, Sebastian, Beaufort, Luc, Rubino, Angelo and Cheng, Hai (2015) Persistent drying in the tropics linked to natural forcing. Nature Communications, 6 (1). ISSN 2041-1723

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Official URL: https://doi.org/10.1038/ncomms8627

Abstract

Approximately half of the world's population lives in the tropics, and future changes in the hydrological cycle will impact not just the freshwater supplies but also energy production in areas dependent upon hydroelectric power. It is vital that we understand the mechanisms/processes that affect tropical precipitation and the eventual surface hydrological response to better assess projected future regional precipitation trends and variability. Paleo-climate proxies are well suited for this purpose as they provide long time series that pre-date and complement the present, often short instrumental observations. Here we present paleo-precipitation data from a speleothem located in Mesoamerica that reveal large multi-decadal declines in regional precipitation, whose onset coincides with clusters of large volcanic eruptions during the nineteenth and twentieth centuries. This reconstruction provides new independent evidence of long-lasting volcanic effects on climate and elucidates key aspects of the causal chain of physical processes determining the tropical climate response to global radiative forcing.

Item Type: Article
Subjects: F600 Geology
F700 Ocean Sciences
F800 Physical and Terrestrial Geographical and Environmental Sciences
F900 Others in Physical Sciences
Department: Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User: Rachel Branson
Date Deposited: 19 Feb 2020 10:53
Last Modified: 19 Feb 2020 11:00
URI: http://nrl.northumbria.ac.uk/id/eprint/42133

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