Výsledky vyhledávání - "Denis Wirrmann"

High-resolution pollen record from Efate Island, central Vanuatu: Highlighting climatic and human influences on Late Holocene vegetation dynamics

Autor: Claire Combettes, Anne-Marie Sémah, Denis Wirrmann

Publikováno v: Comptes Rendus Palevol
Comptes Rendus Palevol, Elsevier, 2015, 14 (4), pp.251-261. ⟨10.1016/j.crpv.2015.02.003⟩
Comptes Rendus. Palevol
Comptes Rendus. Palevol, 2015, 14 (4), pp.251-261. ⟨10.1016/j.crpv.2015.02.003⟩
Comptes Rendus Palevol, Elsevier Masson, 2015, 14 (4), pp.251-261. ⟨10.1016/j.crpv.2015.02.003⟩

International audience; Climate changes, sea-level variations, volcanism and human activity have influenced theenvironment of the southwest Pacific Islands during the Holocene. The high-resolutionpalynological analysis presented here concerns two spe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0fd7dba2ddbfa3c19f023535cb004578
https://hal.sorbonne-universite.fr/hal-01170491

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Preliminary identification of key coral species from New Caledonia (Southwest Pacific Ocean), their significance to reef formation, and responses to environmental change

Autor: Chuki Hongo, Denis Wirrmann

Publikováno v: Island Arc
Island Arc, 2015, 24 (1), pp.31-46. ⟨10.1111/iar.12090⟩
Island Arc, Wiley, 2015, 24 (1), pp.31-46. ⟨10.1111/iar.12090⟩

The recognition of key coral species (KCS) in the geological record, i.e. those that contribute to reef formation and maintenance of coral reef ecosystems, is important for understanding the development and evolution of reef ecosystems and for foreca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccf02d0be1236fac8fac80825ab407f3
http://www.documentation.ird.fr/hor/fdi:010064268

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Late Holocene paleoenvironment in northern New Caledonia, southwestern Pacific, from a multiproxy analysis of lake sediments

Autor: Anne-Marie Sémah, Denis Wirrmann, Magali Chacornac-Rault

Publikováno v: Quaternary Research. 66:213-232

Lithostratigraphic and palynological analysis of two cores recovered from the ‘Grand Lac’ (New Caledonia), combined with 35 14C AMS dates, yields a paleoenvironmental record spanning the last 2000 yr. The lithology is represented mainly by clayey

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c57c489087fc81089e4ca80d666982ab
https://doi.org/10.1016/j.yqres.2006.04.002

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

Autor: Renato Campello Cordeiro, Marcio Henrique da C Gurgel, Jorge Abrao, Bruno Turcq, Denis Wirrmann, Ana Luiza Spadano Albuquerque, Abdelfettah Sifeddine

Publikováno v: Palaeogeography, Palaeoclimatology, Palaeoecology. 214:41-53

The organic matter of lake sediments contains information that allows for the reconstruction of past environmental and climatic changes. The elemental composition and isotopic characteristics of sedimentary organic matter enable discrimination betwee

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7a96718d83133d7bee95f5dac0c0da8a
https://doi.org/10.1016/s0031-0182(04)00322-0

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

Autor: Jacques Bertaux, Alice Kossoni, Denis Wirrmann

Publikováno v: Quaternary Research. 56:275-287

Minerals derived from catchment soils were determined using FTIR spectroscopy in the well-dated core OW4 from Lake Ossa, a lowland rainforest area in Cameroon. This quantification provides a hydrologic record indicating that the magnitude of runoff e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8d3874e88e1c5370e09b44efe99b2983
https://doi.org/10.1006/qres.2001.2240

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Le marais estuarien de la Songolo (Sud Congo) a l'Holocene moyen et recent

Autor: Michel Servant, Louis Martin, H. Elenga, Aline Fabing, Jacques Bertaux, Dominique Schwartz, Denis Wirrmann, Annie Vincens

Publikováno v: Bulletin de la Société Géologique de France. 172:359-366

This paper presents the most recent and detailed Holocene palynological research carried out on the Congolese Atlantic littoral, in the region of Pointe-Noire, as part of the ECOFIT program (CNRS-IRD). The results are obtained on two continental sedi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c3160d32e5bfe7de5aefccaf0635d52e
https://doi.org/10.2113/172.3.359

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

Autor: Martin Élouga, Denis Wirrmann

Publikováno v: Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science. 326:383-389

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fadcd9e4d192defa39e019444dda0f97
https://doi.org/10.1016/s1251-8050(98)80310-8

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

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

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Scopus-Elsevier

Today, precipitation over tropical South America is largely controlled by the seasonal movements of the Inter-Tropical Convergence Zone (ITCZ). During the summer, the ITCZ is shifted southward due to the warming of the continent. Paleoclimate data fr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00be962851f97084c91513d14d59758e
https://doi.org/10.1006/qres.1996.1866

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