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| Titel |
Millennial-scale climatic variability between 340 000 and 270 000 years ago in SW Europe: evidence from a NW Iberian margin pollen sequence |
| VerfasserIn |
S. Desprat, M. F. Sanchez Goñi, J. F. McManus, J. Duprat, E. Cortijo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 5, no. 1 ; Nr. 5, no. 1 (2009-03-06), S.53-72 |
| Datensatznummer |
250002246
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| Publikation (Nr.) |
 copernicus.org/cp-5-53-2009.pdf |
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| Zusammenfassung |
| We present a new high-resolution marine pollen record from NW Iberian margin
sediments (core MD03-2697) covering the interval between 340 000 and 270 000 years ago, a time period centred on Marine Isotope Stage (MIS) 9 and
characterized by particular baseline climate states. This study enables the
documentation of vegetation changes in the north-western Iberian Peninsula
and therefore the terrestrial climatic variability at orbital and in
particular at millennial scales during MIS 9, directly on a marine
stratigraphy. Suborbital vegetation changes in NW Iberia in response to
cool/cold events are detected throughout the studied interval even during
MIS 9e ice volume minimum. However, they appear more frequent and of higher
amplitude during the 30 000 years following the MIS 9e interglacial period
and during the MIS 9a-8 transition, which correspond to intervals of an
intermediate to high ice volume and mainly periods of ice growth. Each
suborbital cold event detected in NW Iberia has a counterpart in the
Southern Iberian margin SST record. High to moderate amplitude cold episodes
detected on land and in the ocean appear to be related to changes in deep
water circulation and probably to iceberg discharges at least during MIS 9d,
the mid-MIS 9c cold event and MIS 9b. This work provides therefore
additional evidence of pervasive millennial-scale climatic variability in
the North Atlantic borderlands throughout past climatic cycles of the Late
Pleistocene, regardless of glacial state. However, ice volume might have an
indirect influence on the amplitude of the millennial climatic changes in
Southern Europe. |
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