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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Centennial-scale solar forcing of the South American Monsoon System recorded in stalagmites

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Novello, Valdir F. [1] ; Vuille, Mathias [2] ; Cruz, Francisco W. [1] ; Strkis, Nicolas M. [1, 3] ; de Paula, Marcos Saito [1] ; Edwards, R. Lawrence [4] ; Cheng, Hai [5, 4] ; Karmann, Ivo [1] ; Jaqueto, Plnio F. [6] ; Trindade, Ricardo I. F. [6] ; Hartmann, Gelvam A. [7] ; Moquet, Jean S. [1]
Total Authors: 12
Affiliation:
[1] Univ Sao Paulo, Inst Geociencias, BR-05508090 Sao Paulo - Brazil
[2] SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 - USA
[3] Univ Fed Fluminense, Dept Geoquim, BR-24220900 Niteroi, RJ - Brazil
[4] Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 - USA
[5] Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049 - Peoples R China
[6] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo - Brazil
[7] Observ Nacl, BR-20921400 Rio De Janeiro - Brazil
Total Affiliations: 7
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 6, APR 21 2016.
Web of Science Citations: 35
Abstract

The South American Monsoon System (SAMS) is generally considered to be highly sensitive to Northern Hemisphere (NH) temperature variations on multi-centennial timescales. The direct influence of solar forcing on moisture convergence in global monsoon systems on the other hand, while well explored in modeling studies, has hitherto not been documented in proxy data from the SAMS region. Hence little is known about the sensitivity of the SAMS to solar forcing over the past millennium and how it might compete or constructively interfere with NH temperature variations that occurred primarily in response to volcanic forcing. Here we present a new annually-resolved oxygen isotope record from a 1500-year long stalagmite recording past changes in precipitation in the hitherto unsampled core region of the SAMS. This record details how solar variability consistently modulated the strength of the SAMS on centennial time scales during the past 1500 years. Solar forcing, besides the previously recognized influence from NH temperature changes and associated Intertropical Convergence Zone (ITCZ) shifts, appears as a major driver affecting SAMS intensity at centennial time scales. (AU)

FAPESP's process: 14/10095-1 - South America monsoon system activity in certer-west of Brazil based in spelothem records associated with other paleoclimate records from South America
Grantee:Valdir Felipe Novello
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 12/03942-4 - South America Monsoon System activity in certer-west of Brazil based in spelothem records associated with other paleoclimate records from South America
Grantee:Valdir Felipe Novello
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 15/08351-2 - South America monsoon system activity in mid-west Brazil based in speleothems records associated with climate models
Grantee:Valdir Felipe Novello
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 12/01187-4 - A calibration study in Central Brazil caves: implications for the paleoclimate inferences from speleothem records
Grantee:Ivo Karmann
Support Opportunities: Regular Research Grants
FAPESP's process: 12/50260-6 - Structure and evolution of the Amazonian biota and its environment: an integrative approach
Grantee:Lúcia Garcez Lohmann
Support Opportunities: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 09/12902-3 - Variability of Summer Monsoon System over the Central-West Brazil during Holocene, based on paleoclimate records from speleothems.
Grantee:Marcos Saito de Paula
Support Opportunities: Scholarships in Brazil - Master