TY - JOUR
KW - climate change
KW - Holocene
KW - Mediterranean Sea
KW - palaeoceanography
KW - planktonic foraminifera
KW - sapropel interruption
AU - S. De Rijk
AU - A. Hayes
AU - E.J. Rohling
AB - We discuss the palaeoclimatic interpretation of unprecedented high-resolution micropalaeontological studies of short-term (2 to 4 centuries) interruptions within early Holocene organic-rich layer (sapropel) S1 from the eastern Mediterranean. Results for cores from the Adriatic and Aegean seas that contain \textquoteleftdouble S1 sapropels indicate that these interruptions, which are centred roughly around 7000 years 14Cnc BP, are genuine and related to climatic deterioration. This interpretation is endorsed by a coeval dry event recorded in terrestrial records and indications of climatic deterioration affecting human migration patterns and early societies in Egypt. The presence of sapropel interruptions in the two major source areas of deep water for the entire eastern Mediterranean likely implies that similar intervals may be found throughout the basin, provided that sedimentation rates and sampling resolutions allow the detection of events with a duration of only several centuries. Moreover, our results show that the \textquoteleftsapropel mode of circulation comprises a delicate balance between reduced ventilation and enhanced productivity, which is easily disturbed through surface water cooling triggering a short time of improved deep water ventilation.
BT - Marine Geology
M1 - 1-4
N1 - doi: 10.1016/S0025-3227(98)00075-9
N2 - We discuss the palaeoclimatic interpretation of unprecedented high-resolution micropalaeontological studies of short-term (2 to 4 centuries) interruptions within early Holocene organic-rich layer (sapropel) S1 from the eastern Mediterranean. Results for cores from the Adriatic and Aegean seas that contain \textquoteleftdouble S1 sapropels indicate that these interruptions, which are centred roughly around 7000 years 14Cnc BP, are genuine and related to climatic deterioration. This interpretation is endorsed by a coeval dry event recorded in terrestrial records and indications of climatic deterioration affecting human migration patterns and early societies in Egypt. The presence of sapropel interruptions in the two major source areas of deep water for the entire eastern Mediterranean likely implies that similar intervals may be found throughout the basin, provided that sedimentation rates and sampling resolutions allow the detection of events with a duration of only several centuries. Moreover, our results show that the \textquoteleftsapropel mode of circulation comprises a delicate balance between reduced ventilation and enhanced productivity, which is easily disturbed through surface water cooling triggering a short time of improved deep water ventilation.
PY - 1999
SN - 0025-3227
SP - 337
EP - 343
T2 - Marine Geology
TI - Eastern Mediterranean sapropel S1 interruption: an expression of the onset of climatic deterioration around 7 ka BP
UR - http://www.sciencedirect.com/science/article/pii/S0025322798000759
VL - 153
ER -