Gloor, EU, Brienen, RJW, Galbraith, D et al. (6 more authors) (2013) Intensification of the Amazon hydrological cycle over the last two decades. Geophysical Research Letters, 40 (9). 1729 - 1733 (5). ISSN 0094-8276
Abstract
The Amazon basin hosts half the planet's remaining moist tropical forests, but they may be threatened in a warming world. Nevertheless, climate model predictions vary from rapid drying to modest wetting. Here we report that the catchment of the world's largest river is experiencing a substantial wetting trend since approximately 1990. This intensification of the hydrological cycle is concentrated overwhelmingly in the wet season driving progressively greater differences in Amazon peak and minimum flows. The onset of the trend coincides with the onset of an upward trend in tropical Atlantic sea surface temperatures (SST). This positive longer-term correlation contrasts with the short-term, negative response of basin-wide precipitation to positive anomalies in tropical North Atlantic SST, which are driven by temporary shifts in the intertropical convergence zone position. We propose that the Amazon precipitation changes since 1990 are instead related to increasing atmospheric water vapor import from the warming tropical Atlantic.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2013, American Geophysical Union. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Amazon; hydrological; cycle |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Geography (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Oct 2013 11:51 |
Last Modified: | 07 Jun 2014 08:48 |
Published Version: | http://dx.doi.org/10.1002/grl.50377 |
Status: | Published |
Publisher: | American Geophysical Union |
Identification Number: | 10.1002/grl.50377 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:76648 |