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Denis Wirrmann

Centre national de la recherche scientifique

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Featured researches published by Denis Wirrmann.

Comptes Rendus De L Academie Des Sciences Serie Ii Fascicule A-sciences De La Terre Et Des Planetes | 1998

Un premier site de l'Âge du fer reconnu dans la région du Lac Ossa, littoral camerounais

Denis Wirrmann; Martin Élouga

Abstract Relics of human activities anterior to the seventeenth century are documented for the first time in the Lake Ossa catchment basin (Cameroon Littoral Province). The remains from two sites are composed mainly of potsherds in association with iron slags, stone implements and charcoals. The charcoal samples yield ages ranging from 1290 to 1647 calendar yr. A.D.

Quaternary Research | 1997

Astronomical Forcing of Contrasting Rainfall Changes in Tropical South America between 12,400 and 8800 cal yr B.P.

Louis Martin; Jacques Bertaux; Thierry Corrège; Marie-Pierre Ledru; Philippe Mourguiart; Abdelfettah Sifeddine; François Soubiès; Denis Wirrmann; Kenitiro Suguio; Bruno Turcq

Journal of Biogeography | 1999

Forest response to climate changes in Atlantic Equatorial Africa during the last 4000 years BP and inheritance on the modern landscapes

Annie Vincens; Dominique Schwartz; H. Elenga; I. Reynaud-Farrera; Anne Alexandre; Jacques Bertaux; André Mariotti; Louis Martin; Jean-Dominique Meunier; Francois Nguetsop; Michel Servant; Simone Servant-Vildary; Denis Wirrmann

Quaternary Research | 1995

Late Quaternary Spatio-temporal Limnological Variations in the Altiplano of Bolivia and Peru

Denis Wirrmann; Philippe Mourguiart

Quaternary Research | 2001

Late Holocene Paleoclimatic Changes in Western Central Africa Inferred from Mineral Abundance in Dated Sediments from Lake Ossa (Southwest Cameroon)

Denis Wirrmann; Jacques Bertaux; Alice Kossoni

Comptes Rendus de l'Académie des Sciences.Série 2a : Sciences de la Terre et des Planètes | 1996

Diagramme pollinique holocène du lac Kitina (Congo) : mise en évidence de changements paléobotaniques et paléoclimatiques dans le massif forestier du Mayombe

H. Elenga; Dominique Schwartz; Annie Vincens; Jacques Bertaux; Christian de Namur; Louis Martin; Denis Wirrmann; Michel Servant

Comptes rendus de l'Académie des sciences. Série 2. Sciences de la terre et des planètes | 1994

Changement majeur de la végétation du lac Sinnda (vallée du Niari, Sud-Congo) consécutif à l'assèchement climatique holocène supérieur : apport de la palynologie

Annie Vincens; Guillaume Buchet; H. Elenga; M. Fournier; Louis Martin; C. de Namur; Dominique Schwartz; Michel Servant; Denis Wirrmann

Comptes rendus de l'Académie des sciences. Série 2, Mécanique, Physique, Chimie, Sciences de l'univers, Sciences de la Terre | 1992

Reconstruction quantitative des niveaux du petit lac Titicaca au cours de l'Holocène

Philippe Mourguiart; Denis Wirrmann; Marc Fournier; Michel Servant

Palaeogeography, Palaeoclimatology, Palaeoecology | 2004

Bulk composition of sedimentary organic matter used in palaeoenvironmental reconstructions: examples from the tropical belt of South America and Africa

Abdelfettah Sifeddine; Denis Wirrmann; Ana Luiza Spadano Albuquerque; Bruno Turcq; Renato Campello Cordeiro; Marcio H.C. Gurgel; Jorge João Abrão

Comptes Rendus De L Academie Des Sciences Serie Ii Fascicule A-sciences De La Terre Et Des Planetes | 1997

Changements limnologiques et climatologiques dans le bassin du lac Titicaca (Bolivie), depuis 30 000 ans

Philippe Mourguiart; Jaime Argollo; Thierry Corre; Louis Martin; Maria Eugenia Montenegro; Abdelfettah Sifeddine; Denis Wirrmann

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Philippe Mourguiart

University of Bordeaux

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Michel Servant

Institut de recherche pour le développement

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Louis Martin

National Council for Scientific and Technological Development

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H. Elenga

Centre national de la recherche scientifique

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Annie Vincens

Aix-Marseille University

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Dominique Schwartz

University of Strasbourg

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André Mariotti

Centre national de la recherche scientifique

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Abdelfettah Sifeddine

Federal Fluminense University

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Anne Alexandre

Aix-Marseille University

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I. Reynaud-Farrera

University of Montpellier

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