Seasonal Amazonian rainfall variation in the Miocene Climate Optimum

Kaandorp, Ronald Johannes Gerardus; Vonhof, Hubert B.; Wesselingh, Frank Pieter; Romero Pittman, Lidia; Kroon, Dick; Van Hinte, Jan E.

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Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12544/631

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dc.contributor.author

Kaandorp, Ronald Johannes Gerardus

dc.contributor.author

Vonhof, Hubert B.

dc.contributor.author

Wesselingh, Frank Pieter

dc.contributor.author

Romero Pittman, Lidia

dc.contributor.author

Kroon, Dick

dc.contributor.author

Van Hinte, Jan E.

dc.coverage.spatial (es_PE)

Amazonia

dc.coverage.spatial (es_PE)

Loreto

dc.coverage.spatial (es_PE)

Perú

dc.coverage.temporal

Mioceno

dc.date.accessioned

2017-10-17T22:27:31Z

dc.date.available

2017-10-17T22:27:31Z

dc.date.issued

2005-05

dc.identifier.citation (es_PE)

Kaandorp, R.J.G.; Vonhof, H. B.; Wesselingh, F. P.; Romero, L,; Kroon,D. & Van Hinte, J. E. (2005) - Seasonal Amazonian rainfall variation in the Miocene Climate Optimum. Palaeogeography, Palaeoclimatology, Palaeoecology, 221(1-2): 1-6. Doi: 10.1016/j.palaeo.2004.12.024.

dc.identifier.uri

https://hdl.handle.net/20.500.12544/631

dc.description (es_PE)

6 p.

dc.description.abstract (es_PE)

Modern and fossil freshwater bivalves from north-eastern Peru are investigated to reconstruct seasonal rainfall patterns in Miocene Amazonia. Oxygen isotope variation in incremental growth bands of fossil bivalves reflects past hydrological conditions in the Miocene Climate Optimum (MCO), when the world was warmer than today. A calibration experiment was conducted on a modern bivalve. Modern river dwelling Triplodon corrugatus shows large amplitudinal changes in d18O, which mirror the seasonal variation in rainfall as a result of the annual migration cycle of the Inter Tropical Convergence Zone (ITCZ). Growth incremental oxygen isotope records of Miocene Amazonian Diplodon aff. Longulus bivalves show strikingly similar patterns. This suggests that the seasonal migration of the ITCZ and the intensity of the hydrological cycle in the MCO were comparable to today. The implications are that humid climate conditions sufficient to sustain a rainforest ecosystem already existed ~16 Ma ago.

dc.format (es_PE)

application/pdf

dc.language.iso (es_PE)

eng

dc.publisher (es_PE)

Elsevier

dc.relation.ispartof

urn:issn:0031-0182

dc.rights (es_PE)

info:eu-repo/semantics/openAccess

dc.rights.uri (es_PE)

http://creativecommons.org/licenses/by-nc-nd/4.0/

dc.source (es_PE)

Repositorio Institucional INGEMMET

dc.source (es_PE)

Instituto Geológico, Minero y Metalúrgico – INGEMMET

dc.subject (es_PE)

Agua dulce

dc.subject (es_PE)

Bivalvia

dc.subject (es_PE)

Isótopos estables

dc.subject (es_PE)

Paleoclimatología

dc.subject (es_PE)

Precipitación atmosférica

dc.subject (es_PE)

Formación Pebas

dc.title (es_PE)

Seasonal Amazonian rainfall variation in the Miocene Climate Optimum

dc.type (es_PE)

info:eu-repo/semantics/article

dcterms.subject (es_PE)

Geociencias

dc.publisher.country (es_PE)

NL

dc.identifier.doi

https://doi.org/10.1016/j.palaeo.2004.12.024

dc.identifier.journal (es_PE)

Palaeogeography, Palaeoclimatology, Palaeoecology

dc.description.peer-review (es_PE)

Peer reviewed

dc.identifier.bibliographicCitation (es_PE)

Palaeogeography, Palaeoclimatology, Palaeoecology, v. 221, n. 1-2, 2005.

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