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Amplified seasonal cycle in hydroclimate over the Amazon river basin and its plume region

The Amazon river basin receives ~2000 mm of precipitation annually and contributes ~17% of global river freshwater input to the oceans; its hydroclimatic variations can exert profound impacts on the marine ecosystem in the Amazon plume region (APR) and have potential far-reaching influences on hydro...

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Autores principales: Liang, Yu-Chiao, Lo, Min-Hui, Lan, Chia-Wei, Seo, Hyodae, Ummenhofer, Caroline C., Yeager, Stephen, Wu, Ren-Jie, Steffen, John D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7463004/
https://www.ncbi.nlm.nih.gov/pubmed/32873800
http://dx.doi.org/10.1038/s41467-020-18187-0
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author Liang, Yu-Chiao
Lo, Min-Hui
Lan, Chia-Wei
Seo, Hyodae
Ummenhofer, Caroline C.
Yeager, Stephen
Wu, Ren-Jie
Steffen, John D.
author_facet Liang, Yu-Chiao
Lo, Min-Hui
Lan, Chia-Wei
Seo, Hyodae
Ummenhofer, Caroline C.
Yeager, Stephen
Wu, Ren-Jie
Steffen, John D.
author_sort Liang, Yu-Chiao
collection PubMed
description The Amazon river basin receives ~2000 mm of precipitation annually and contributes ~17% of global river freshwater input to the oceans; its hydroclimatic variations can exert profound impacts on the marine ecosystem in the Amazon plume region (APR) and have potential far-reaching influences on hydroclimate over the tropical Atlantic. Here, we show that an amplified seasonal cycle of Amazonia precipitation, represented by the annual difference between maximum and minimum values, during the period 1979–2018, leads to enhanced seasonalities in both Amazon river discharge and APR ocean salinity. An atmospheric moisture budget analysis shows that these enhanced seasonal cycles are associated with similar amplifications in the atmospheric vertical and horizontal moisture advections. Hierarchical sensitivity experiments using global climate models quantify the relationships of these enhanced seasonalities. The results suggest that an intensified hydroclimatological cycle may develop in the Amazonia atmosphere-land-ocean coupled system, favouring more extreme terrestrial and marine conditions.
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spelling pubmed-74630042020-09-16 Amplified seasonal cycle in hydroclimate over the Amazon river basin and its plume region Liang, Yu-Chiao Lo, Min-Hui Lan, Chia-Wei Seo, Hyodae Ummenhofer, Caroline C. Yeager, Stephen Wu, Ren-Jie Steffen, John D. Nat Commun Article The Amazon river basin receives ~2000 mm of precipitation annually and contributes ~17% of global river freshwater input to the oceans; its hydroclimatic variations can exert profound impacts on the marine ecosystem in the Amazon plume region (APR) and have potential far-reaching influences on hydroclimate over the tropical Atlantic. Here, we show that an amplified seasonal cycle of Amazonia precipitation, represented by the annual difference between maximum and minimum values, during the period 1979–2018, leads to enhanced seasonalities in both Amazon river discharge and APR ocean salinity. An atmospheric moisture budget analysis shows that these enhanced seasonal cycles are associated with similar amplifications in the atmospheric vertical and horizontal moisture advections. Hierarchical sensitivity experiments using global climate models quantify the relationships of these enhanced seasonalities. The results suggest that an intensified hydroclimatological cycle may develop in the Amazonia atmosphere-land-ocean coupled system, favouring more extreme terrestrial and marine conditions. Nature Publishing Group UK 2020-09-01 /pmc/articles/PMC7463004/ /pubmed/32873800 http://dx.doi.org/10.1038/s41467-020-18187-0 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Liang, Yu-Chiao
Lo, Min-Hui
Lan, Chia-Wei
Seo, Hyodae
Ummenhofer, Caroline C.
Yeager, Stephen
Wu, Ren-Jie
Steffen, John D.
Amplified seasonal cycle in hydroclimate over the Amazon river basin and its plume region
title Amplified seasonal cycle in hydroclimate over the Amazon river basin and its plume region
title_full Amplified seasonal cycle in hydroclimate over the Amazon river basin and its plume region
title_fullStr Amplified seasonal cycle in hydroclimate over the Amazon river basin and its plume region
title_full_unstemmed Amplified seasonal cycle in hydroclimate over the Amazon river basin and its plume region
title_short Amplified seasonal cycle in hydroclimate over the Amazon river basin and its plume region
title_sort amplified seasonal cycle in hydroclimate over the amazon river basin and its plume region
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7463004/
https://www.ncbi.nlm.nih.gov/pubmed/32873800
http://dx.doi.org/10.1038/s41467-020-18187-0
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