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Sanchez Goñi, Maria Fernanda; Landais, Amaelle; Fletcher, William J; Naughton, Filipa; Desprat, Stéphanie; Duprat, Josette M (2008): (Table 1) Age determination of sediment core MD04-2845. PANGAEA, https://doi.org/10.1594/PANGAEA.816899, Supplement to: Sanchez Goñi, MF et al. (2008): Contrasting impacts of Dansgaard–Oeschger events over a western European latitudinal transect modulated by orbital parameters. Quaternary Science Reviews, 27(11-12), 1136-1151, https://doi.org/10.1016/j.quascirev.2008.03.003

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Abstract:
Terrestrial and marine proxies (pollen, planktic and benthic foraminiferal oxygen isotopes, alkenone- and foraminifer-derived sea-surface temperatures (SSTs), ice-rafted debris) from IMAGES deep-sea cores MD95-2042 and SU81-18 (37°N, 10°W), MD99-2331 and MD03-2697 (42°N, 9°W), and MD04-2845 (45°N, 5°W) show that western European and offshore environments were strongly affected by Dansgaard-Oeschger (D-O) and Heinrich (H) events. We concentrate here on latitudinal variability in the forest cover extent and composition of western Europe during the succession of D-O events, showing new pollen records for core MD04-2845 and for marine isotopic stages (MIS) 3 and 4 of core MD99-2331. In general, cold SSTs characteristic of Greenland stadials were contemporaneous with the expansion of semi-desert or steppic vegetation while Greenland interstadials were synchronous with the expansion of forest. Our data reveal that the amplitude of Atlantic and Mediterranean forest expansions differs for any given D-O warming during the glacial period (74-18 ka). In the western Mediterranean, D-O 16-17 and D-O 8 and 7 (corresponding to minima in precession) were associated with strong expansion of forest cover contrasting with weak expansion of forest cover during D-O 14 and 12; the opposite pattern is revealed at the Atlantic sites. Further north, the strongest Greenland warmings are recorded for D-O 19, 11 and 8. This contrasting latitudinal climatic scenario is compared with other northern hemisphere records, revealing similarities between the Mediterranean climate and the Asian monsoon regime, which may relate to a summer atmospheric teleconnection between the two regions comparable to the present-day situation. Parallels between Mediterranean climate enhancement and peaks in global methane (CH4) during the last glacial period suggest a significant role of monsoon activity in determining CH4 emission from wetlands.
Further details:
Bard, Édouard; Rostek, Frauke; Guillemette, Ménot-Combes (2004): Radiocarbon calibration beyond 20,000 14C yr B.P. by means of planktonic foraminifera of the Iberian Margin. Quaternary Research, 61(2), 204-214, https://doi.org/10.1016/j.yqres.2003.11.006
Coverage:
Latitude: 45.347670 * Longitude: -5.219500
Minimum DEPTH, sediment/rock: 9.80 m * Maximum DEPTH, sediment/rock: 10.78 m
Event(s):
MD04-2845 * Latitude: 45.347670 * Longitude: -5.219500 * Elevation: -4175.0 m * Location: North East Atlantic * Campaign: MD141 (ALIENOR) * Basis: Marion Dufresne * Device: Calypso Corer (CALYPSO)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Sample IDSample IDSanchez Goñi, Maria Fernanda
2Datum levelDLSanchez Goñi, Maria Fernanda
3DEPTH, sediment/rockDepthmGeocode
4Age, dated materialDated materialSanchez Goñi, Maria Fernanda
5Age, datedAge datedkaSanchez Goñi, Maria FernandaAge, 14C conventional
6Age, dated standard deviationAge dated std dev±Sanchez Goñi, Maria FernandaAge, 14C conventional
7Calendar yearsCal yrska BPSanchez Goñi, Maria FernandaAge, 14C calibratedBard et al. (2004)
8Age modelAge modelkaSanchez Goñi, Maria Fernandabased on MD95-2042 chronology
Size:
42 data points

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