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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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.
Latitude: 45.347670 * Longitude: -5.219500
Minimum DEPTH, sediment/rock: 9.80 m * Maximum DEPTH, sediment/rock: 10.78 m
|#||Name||Short Name||Unit||Principal Investigator||Method||Comment|
|1||Sample ID||Sample ID||Sanchez Goñi, Maria Fernanda|
|2||Datum level||DL||Sanchez Goñi, Maria Fernanda|
|4||Age, dated material||Dated material||Sanchez Goñi, Maria Fernanda|
|5||Age, dated||Age dated||ka||Sanchez Goñi, Maria Fernanda||Age, 14C conventional|
|6||Age, dated standard deviation||Age dated std dev||±||Sanchez Goñi, Maria Fernanda||Age, 14C conventional|
|7||Calendar years||Cal yrs||ka BP||Sanchez Goñi, Maria Fernanda||Age, 14C calibrated||Bard et al. (2004)|
|8||Age model||Age model||ka||Sanchez Goñi, Maria Fernanda||based on MD95-2042 chronology|
42 data points