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| Titel |
Climate variability in the Gulf of Lions (Western Mediterranean Sea) over the last 2 thousand years |
| VerfasserIn |
Marie-Alexandrine Sicre, Bassem Jalali, Nejib Kallel, Ullah Ezat, Maria-Angela Bassetti |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250077351
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| Zusammenfassung |
| We present a new high-resolution of Sea Surface Temperature (SSTs) over the last 2000 years
obtained from alkenones preserved in the core KSGC31 retrieved in the mud belt from the
Gulf of Lions. This record represents a continuous and undisturbed sediment timeseries
documenting climate variability at a temporal resolution of ~ 10 years from 0 to 1905 AD.
SST values calculated from the unsaturation index of C37 alkenones range from 15 to 18 Ë
C (mean value = 16.5Ë C+0.5Ë C). They rise from ~ 950 AD and remain warm
till about 1300-1350Ë C AD that broadly coincides with the Medieval Climate
Anomaly (MCA). Then, they declined till the late 1500’s marking the onset of an
outstanding warm period of several decades with values similar to those of the MCA and
Roman warm Period. After a sharp decrease ending this warm spell ~1700 yrs
AD, SSTs gradually rise again (~ 1Ë C/100 yrs) over the last three centuries. This
record differs from published data in the North Atlantic that indicate cooling over
the last two millennia. We suggest that the Mediterranean recent warming reflects
feedbacks from the vegetation and land use around the basin through albedo changes. |
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