Spatiotemporal Variations of Riverine Discharge Within the Amazon Basin During the Late Holocene Coincide With Extratropical Temperature Anomalies

D. J. Bertassoli; A. O. Sawakuchi; C. M. Chiessi; E. Schefuß; G. A. Hartmann; C. Häggi; F. W. Cruz; M. Zabel; M. M. McGlue; R. A. Santos; F. N. Pupim

doi:10.1029/2019GL082936

Spatiotemporal Variations of Riverine Discharge Within the Amazon Basin During the Late Holocene Coincide With Extratropical Temperature Anomalies

D. J. Bertassoli
, A. O. Sawakuchi
, C. M. Chiessi
, E. Schefuß
, G. A. Hartmann
, C. Häggi
, F. W. Cruz
, M. Zabel
, M. M. McGlue
, R. A. Santos
, F. N. Pupim

Producción científica: Article › revisión exhaustiva

22 Citas (Scopus)

Resumen

Late Holocene hydroclimate variations have been extensively recognized in Amazonia, but the effects of such changes on riverine discharge within the Amazon lowlands are still poorly understood. We investigated a sediment core covering circa 4,000 to 300 cal yr BP collected in the lower valley of the Xingu River (Xingu Ria) in an area under the influence of the Amazon River. Our results indicate a decrease in precipitation in the Amazon lowlands throughout the studied period and reduced input of coarser and potassium-rich Amazon River sediments to the confluence from about 2,600 to 1,400 cal yr BP. We suggest that lower temperatures in the extratropical Southern Hemisphere weakened the South American Summer Monsoon and led to a decrease in the water discharge of the Amazon River during this period.

Idioma original	English
Páginas (desde-hasta)	9013-9022
Número de páginas	10
Publicación	Geophysical Research Letters
Volumen	46
N.º	15
DOI	https://doi.org/10.1029/2019GL082936
Estado	Published - ago 16 2019

Nota bibliográfica

Publisher Copyright:
©2019. American Geophysical Union. All Rights Reserved.

Financiación

The authors acknowledge funding through the São Paulo Research Foundation (FAPESP, grants 2017/50085-3, 2014/23334-4, 2016/11141-2, 2016/02656-9, and 2017/25735-4); the Brazilian Federal Agency for Support and Evaluation of Graduate Education (CAPES, grants AUXPE 1976/2014, 2043/2014, and 564/2015); and the National Council for Scientific and Technological Development (CNPq, grants 454609/2014-0, 302607/2016-1, 422255/2016-5, 306527/2017-0, and 302411/2018-6). This work was supported through the DFG Research Center/Cluster of Excellence The Ocean in the Earth System. We thank the Paleomagnetism Laboratory (USPMag) of the University of São Paulo (Brazil). We acknowledge Ralph Kreutz for laboratory support, Daniel Atencio for providing the XRF equipment, and Mauricio Parra, Tatiana Pereira and Leandro Souza for helping during the field surveys. All data presented in this study are permanently archived on the Pangaea data repository (www.pangaea.de). The authors declare no conflict of interest. The authors acknowledge funding through the São Paulo Research Foundation (FAPESP, grants 2017/50085‐3, 2014/23334‐4, 2016/11141‐2, 2016/02656‐9, and 2017/25735‐4); the Brazilian Federal Agency for Support and Evaluation of Graduate Education (CAPES, grants AUXPE 1976/2014, 2043/2014, and 564/2015); and the National Council for Scientific and Technological Development (CNPq, grants 454609/2014‐0, 302607/2016‐1, 422255/2016‐5, 306527/2017‐0, and 302411/2018‐6). This work was supported through the DFG Research Center/Cluster of Excellence . We thank the Paleomagnetism Laboratory (USPMag) of the University of São Paulo (Brazil). We acknowledge Ralph Kreutz for laboratory support, Daniel Atencio for providing the XRF equipment, and Mauricio Parra, Tatiana Pereira and Leandro Souza for helping during the field surveys. All data presented in this study are permanently archived on the Pangaea data repository ( www.pangaea.de ). The authors declare no conflict of interest. The Ocean in the Earth System

Financiadores	Número del financiador
DFG Research Center/Cluster of Excellence
Paleomagnetism Laboratory
USPMag
Deutsche Forschungsgemeinschaft
Fundação de Amparo à Pesquisa do Estado de São Paulo	2014/23334‐4, 2016/11141‐2, 2017/25735‐4, 2017/50085‐3, 2016/02656‐9
Fundação de Amparo à Pesquisa do Estado de São Paulo
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior	AUXPE 1976/2014, 564/2015, 2043/2014
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Conselho Nacional de Desenvolvimento Científico e Tecnológico	454609/2014‐0, 306527/2017‐0, 302411/2018‐6, 302607/2016‐1
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Universidade Cidade de São Paulo

ASJC Scopus subject areas

Geophysics
General Earth and Planetary Sciences

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Bertassoli, D. J., Sawakuchi, A. O., Chiessi, C. M., Schefuß, E., Hartmann, G. A., Häggi, C., Cruz, F. W., Zabel, M., McGlue, M. M., Santos, R. A., & Pupim, F. N. (2019). Spatiotemporal Variations of Riverine Discharge Within the Amazon Basin During the Late Holocene Coincide With Extratropical Temperature Anomalies. Geophysical Research Letters, 46(15), 9013-9022. https://doi.org/10.1029/2019GL082936

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title = "Spatiotemporal Variations of Riverine Discharge Within the Amazon Basin During the Late Holocene Coincide With Extratropical Temperature Anomalies",

abstract = "Late Holocene hydroclimate variations have been extensively recognized in Amazonia, but the effects of such changes on riverine discharge within the Amazon lowlands are still poorly understood. We investigated a sediment core covering circa 4,000 to 300 cal yr BP collected in the lower valley of the Xingu River (Xingu Ria) in an area under the influence of the Amazon River. Our results indicate a decrease in precipitation in the Amazon lowlands throughout the studied period and reduced input of coarser and potassium-rich Amazon River sediments to the confluence from about 2,600 to 1,400 cal yr BP. We suggest that lower temperatures in the extratropical Southern Hemisphere weakened the South American Summer Monsoon and led to a decrease in the water discharge of the Amazon River during this period.",

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Bertassoli, DJ, Sawakuchi, AO, Chiessi, CM, Schefuß, E, Hartmann, GA, Häggi, C, Cruz, FW, Zabel, M, McGlue, MM, Santos, RA & Pupim, FN 2019, 'Spatiotemporal Variations of Riverine Discharge Within the Amazon Basin During the Late Holocene Coincide With Extratropical Temperature Anomalies', Geophysical Research Letters, vol. 46, n.º 15, pp. 9013-9022. https://doi.org/10.1029/2019GL082936

TY - JOUR

T1 - Spatiotemporal Variations of Riverine Discharge Within the Amazon Basin During the Late Holocene Coincide With Extratropical Temperature Anomalies

AU - Bertassoli, D. J.

AU - Sawakuchi, A. O.

AU - Chiessi, C. M.

AU - Schefuß, E.

AU - Hartmann, G. A.

AU - Häggi, C.

AU - Cruz, F. W.

AU - Zabel, M.

AU - McGlue, M. M.

AU - Santos, R. A.

AU - Pupim, F. N.

PY - 2019/8/16

Y1 - 2019/8/16

N2 - Late Holocene hydroclimate variations have been extensively recognized in Amazonia, but the effects of such changes on riverine discharge within the Amazon lowlands are still poorly understood. We investigated a sediment core covering circa 4,000 to 300 cal yr BP collected in the lower valley of the Xingu River (Xingu Ria) in an area under the influence of the Amazon River. Our results indicate a decrease in precipitation in the Amazon lowlands throughout the studied period and reduced input of coarser and potassium-rich Amazon River sediments to the confluence from about 2,600 to 1,400 cal yr BP. We suggest that lower temperatures in the extratropical Southern Hemisphere weakened the South American Summer Monsoon and led to a decrease in the water discharge of the Amazon River during this period.

AB - Late Holocene hydroclimate variations have been extensively recognized in Amazonia, but the effects of such changes on riverine discharge within the Amazon lowlands are still poorly understood. We investigated a sediment core covering circa 4,000 to 300 cal yr BP collected in the lower valley of the Xingu River (Xingu Ria) in an area under the influence of the Amazon River. Our results indicate a decrease in precipitation in the Amazon lowlands throughout the studied period and reduced input of coarser and potassium-rich Amazon River sediments to the confluence from about 2,600 to 1,400 cal yr BP. We suggest that lower temperatures in the extratropical Southern Hemisphere weakened the South American Summer Monsoon and led to a decrease in the water discharge of the Amazon River during this period.

KW - Amazon

KW - Amazonia

KW - Holocene

KW - SASM

KW - late Holocene

KW - paleoclimate

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JO - Geophysical Research Letters

JF - Geophysical Research Letters

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Spatiotemporal Variations of Riverine Discharge Within the Amazon Basin During the Late Holocene Coincide With Extratropical Temperature Anomalies

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