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South American precipitation dipole forced by interhemispheric temperature gradient.
Campos, Marília C; Chiessi, Cristiano M; Novello, Valdir F; Crivellari, Stefano; Campos, José L P S; Albuquerque, Ana Luiza S; Venancio, Igor M; Santos, Thiago P; Melo, Dayane B; Cruz, Francisco W; Sawakuchi, André O; Mendes, Vinícius R.
Afiliação
  • Campos MC; Institute of Geosciences, University of São Paulo, São Paulo, Brazil. marilia.carvalho.campos@usp.br.
  • Chiessi CM; School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, Brazil.
  • Novello VF; Department of Geosciences, University of Tübingen, Tübingen, Germany.
  • Crivellari S; School of Arts, Sciences and Humanities, University of São Paulo, São Paulo, Brazil.
  • Campos JLPS; Institute of Geosciences, University of São Paulo, São Paulo, Brazil.
  • Albuquerque ALS; Graduate Program in Geochemistry, Fluminense Federal University, Niterói, Brazil.
  • Venancio IM; Graduate Program in Geochemistry, Fluminense Federal University, Niterói, Brazil.
  • Santos TP; MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany.
  • Melo DB; Graduate Program in Geochemistry, Fluminense Federal University, Niterói, Brazil.
  • Cruz FW; Institute of Marine Science, Federal University of São Paulo, Santos, Brazil.
  • Sawakuchi AO; Institute of Geosciences, University of São Paulo, São Paulo, Brazil.
  • Mendes VR; Institute of Geosciences, University of São Paulo, São Paulo, Brazil.
Sci Rep ; 12(1): 10527, 2022 06 22.
Article em En | MEDLINE | ID: mdl-35732794
Tropical South American hydroclimate sustains the world's highest biodiversity and hundreds of millions of people. Whitin this region, Amazonia and northeastern Brazil have attracted much attention due to their high biological and social vulnerabilities to climate change (i.e. considered climate change hotspots). Still, their future response to climate change remains uncertain. On precession timescale, it has been suggested that periods of decreased western Amazonian precipitation were accompanied by increased northeastern Brazilian precipitation and vice-versa, setting an east-west tropical South American precipitation dipole. However, the very existence of this precession-driven precipitation dipole remains unsettled given the scarcity of long and appropriate northeastern Brazilian records. Here we show that the precession-driven South American precipitation dipole has persisted over the last 113 ka as revealed by a northern northeastern Brazilian precipitation record obtained from quartz thermoluminescence sensitivity measured in marine sediment cores. Precession-induced austral summer insolation changes drove the precipitation dipole through the interhemispheric temperature gradient control over the regional Walker circulation and the Intertropical Convergence Zone seasonal migration range. Since modern global warming affects the interhemispheric temperature gradient, our study provides insights about possible future tropical South American hydroclimate responses.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Chuva / Mudança Climática Limite: Humans País/Região como assunto: America do sul / Brasil Idioma: En Revista: Sci Rep Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
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XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Chuva / Mudança Climática Limite: Humans País/Região como assunto: America do sul / Brasil Idioma: En Revista: Sci Rep Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido