Millennial-scale changes in vegetation records from tropical Africa and South America during the last glacial

Ines Hessler; Lydie Dupont; Raymonde Bonnefille; Hermann Behling; Catalina González; Karin F. Helmens; Henry Hooghiemstra; Judicael Lebamba; Marie Pierre Ledru; Anne Marie Lézine; Jean Maley; Fabienne Marret; Annie Vincens

doi:10.1016/j.quascirev.2009.11.029

Millennial-scale changes in vegetation records from tropical Africa and South America during the last glacial

Ines Hessler^*, Lydie Dupont, Raymonde Bonnefille, Hermann Behling, Catalina González, Karin F. Helmens, Henry Hooghiemstra, Judicael Lebamba, Marie Pierre Ledru, Anne Marie Lézine, Jean Maley, Fabienne Marret, Annie Vincens

^*Corresponding author for this work

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61 Citations (Scopus)

Abstract

To reconstruct the response of vegetation to abrupt climate changes during the last glacial we have compiled pollen records from the circum-Atlantic tropics between 23°N and 23°S from both marine and terrestrial sediment cores. Pollen data were grouped into mega-biomes to facilitate the comparison between the different records. Most tropical African records do not appear to register Dansgaard-Oeschger (D-O) variability, although there are vegetation changes during Heinrich Stadials (HS). There is a stronger signal of D-O and HS variability in the South American records. Records close to the modern northern and southern limits of the Intertropical Convergence Zone (ITCZ) show opposite trends in vegetation development during HS and D-O cycles. The pollen data from tropical South America corroborate the hypothesis of a southward shift in the migration pattern of the ITCZ and a reduction in the Atlantic Meridional Overturning Circulation (AMOC) during HS.

Original language	English
Pages (from-to)	2882-2899
Number of pages	18
Journal	Quaternary Science Reviews
Volume	29
Issue number	21-22
DOIs	https://doi.org/10.1016/j.quascirev.2009.11.029
Publication status	Published - Oct 2010

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Hessler, I., Dupont, L., Bonnefille, R., Behling, H., González, C., Helmens, K. F., Hooghiemstra, H., Lebamba, J., Ledru, M. P., Lézine, A. M., Maley, J., Marret, F., & Vincens, A. (2010). Millennial-scale changes in vegetation records from tropical Africa and South America during the last glacial. Quaternary Science Reviews, 29(21-22), 2882-2899. https://doi.org/10.1016/j.quascirev.2009.11.029

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title = "Millennial-scale changes in vegetation records from tropical Africa and South America during the last glacial",

abstract = "To reconstruct the response of vegetation to abrupt climate changes during the last glacial we have compiled pollen records from the circum-Atlantic tropics between 23°N and 23°S from both marine and terrestrial sediment cores. Pollen data were grouped into mega-biomes to facilitate the comparison between the different records. Most tropical African records do not appear to register Dansgaard-Oeschger (D-O) variability, although there are vegetation changes during Heinrich Stadials (HS). There is a stronger signal of D-O and HS variability in the South American records. Records close to the modern northern and southern limits of the Intertropical Convergence Zone (ITCZ) show opposite trends in vegetation development during HS and D-O cycles. The pollen data from tropical South America corroborate the hypothesis of a southward shift in the migration pattern of the ITCZ and a reduction in the Atlantic Meridional Overturning Circulation (AMOC) during HS.",

author = "Ines Hessler and Lydie Dupont and Raymonde Bonnefille and Hermann Behling and Catalina Gonz{\'a}lez and Helmens, {Karin F.} and Henry Hooghiemstra and Judicael Lebamba and Ledru, {Marie Pierre} and L{\'e}zine, {Anne Marie} and Jean Maley and Fabienne Marret and Annie Vincens",

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Hessler, I, Dupont, L, Bonnefille, R, Behling, H, González, C, Helmens, KF, Hooghiemstra, H, Lebamba, J, Ledru, MP, Lézine, AM, Maley, J, Marret, F & Vincens, A 2010, 'Millennial-scale changes in vegetation records from tropical Africa and South America during the last glacial', Quaternary Science Reviews, vol. 29, no. 21-22, pp. 2882-2899. https://doi.org/10.1016/j.quascirev.2009.11.029

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AU - Hessler, Ines

AU - Dupont, Lydie

AU - Bonnefille, Raymonde

AU - Behling, Hermann

AU - González, Catalina

AU - Helmens, Karin F.

AU - Hooghiemstra, Henry

AU - Lebamba, Judicael

AU - Ledru, Marie Pierre

AU - Lézine, Anne Marie

AU - Maley, Jean

AU - Marret, Fabienne

AU - Vincens, Annie

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N2 - To reconstruct the response of vegetation to abrupt climate changes during the last glacial we have compiled pollen records from the circum-Atlantic tropics between 23°N and 23°S from both marine and terrestrial sediment cores. Pollen data were grouped into mega-biomes to facilitate the comparison between the different records. Most tropical African records do not appear to register Dansgaard-Oeschger (D-O) variability, although there are vegetation changes during Heinrich Stadials (HS). There is a stronger signal of D-O and HS variability in the South American records. Records close to the modern northern and southern limits of the Intertropical Convergence Zone (ITCZ) show opposite trends in vegetation development during HS and D-O cycles. The pollen data from tropical South America corroborate the hypothesis of a southward shift in the migration pattern of the ITCZ and a reduction in the Atlantic Meridional Overturning Circulation (AMOC) during HS.

AB - To reconstruct the response of vegetation to abrupt climate changes during the last glacial we have compiled pollen records from the circum-Atlantic tropics between 23°N and 23°S from both marine and terrestrial sediment cores. Pollen data were grouped into mega-biomes to facilitate the comparison between the different records. Most tropical African records do not appear to register Dansgaard-Oeschger (D-O) variability, although there are vegetation changes during Heinrich Stadials (HS). There is a stronger signal of D-O and HS variability in the South American records. Records close to the modern northern and southern limits of the Intertropical Convergence Zone (ITCZ) show opposite trends in vegetation development during HS and D-O cycles. The pollen data from tropical South America corroborate the hypothesis of a southward shift in the migration pattern of the ITCZ and a reduction in the Atlantic Meridional Overturning Circulation (AMOC) during HS.

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JO - Quaternary Science Reviews

JF - Quaternary Science Reviews

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ER -

Millennial-scale changes in vegetation records from tropical Africa and South America during the last glacial

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