10.1594/PANGAEA.735959
Emeis, Kay-Christian
Kay-Christian
Emeis
0000-0003-0459-913X
Struck, Ulrich
Ulrich
Struck
Schulz, Hans-Martin
Hans-Martin
Schulz
Rosenberg, Mark
Mark
Rosenberg
Bernasconi, Stefano M
Stefano M
Bernasconi
0000-0001-7672-8856
Erlenkeuser, Helmut
Helmut
Erlenkeuser
0000-0002-5567-4796
Sakamoto, Tatsuhiko
Tatsuhiko
Sakamoto
Martinez-Ruiz, Francisca C
Francisca C
Martinez-Ruiz
0000-0002-8301-4453
Sea surface temperature reconstruction for Mediterranean Sea samples
PANGAEA
2000
Drilling/drill rig
Piston corer
Giant box corer
Piston corer (BGR type)
MultiCorer
Gravity corer (Kiel type)
Box corer
Leg160
FAEGAS_IV
M25/1
M25/4
M40/4
Joides Resolution
Le Noroit
Meteor (1986)
Ocean Drilling Program (ODP)
1982-11-29T00:00:00/1998-02-07T23:49:00
en
Supplementary Publication Series of Datasets
10.1016/S0031-0182(00)00053-5
4 datasets
application/zip
Creative Commons Attribution 3.0 Unported
Alkenone unsaturation ratios and planktonic delta18O records from sediment cores of the Alboran, Ionian and Levantine basins in the Mediterranean Sea show pronounced variations in paleo-temperatures and -salinities of surface waters over the last 16,000 years. Average sea surface temperatures (SSTs) are low during the last glacial (averages prior to 13,000 years: 11-15°C), vary rapidly at the beginning of the Holocene, and increase to 17-18°C at all sites during S1 formation (dated between 9500 and 6600 calendar years). The modern temperature gradient (2-3°C) between the Mediterranean sub-basins is maintained during formation of sapropel S1 in the Eastern Mediterranean Sea. After S1, SSTs have remained uniform in the Alboran Sea at 18°C and have fluctuated around 20°C in the Ionian and Levantine Basin sites. The delta18O of planktonic foraminifer calcite decreases by 2 per mil from the late glacial to S1 sediments in the Ionian Basin and by 2.8 per mil in the Levantine Basin. In the Alboran Sea, the decrease is 1.7 per mil. Of the 2.8 per mil decrease in the Levantine Basin, the effect of global ice volume accounts for a maximum of 1.05 per mil and the temperature increase explains only a maximum of 1.3 per mil. The remainder is attributed to salinity changes. We use the temperature and salinity estimates to calculate seawater density changes. They indicate that a reversal of water mass circulation is not a likely explanation for increased carbon burial during S1 time. Instead, it appears that intermediate and deep water formation may have shifted to the Ionian Sea approximately 2000 years before onset of S1 deposition, because surface waters were as cold, but saltier than surface water in the Levantine Basin during the Younger Dryas. Sapropel S1 began to form at the same time, when a significant density decrease also occurred in the Ionian Sea.
Supplement to: Emeis, Kay-Christian; Struck, Ulrich; Schulz, Hans-Martin; Rosenberg, Mark; Bernasconi, Stefano M; Erlenkeuser, Helmut; Sakamoto, Tatsuhiko; Martinez-Ruiz, Francisca C (2000): Temperature and salinity variations of Mediterranean Sea surface water over the last 16,000 years from records of planktonic stable oxygen isotopes and alkenone unsaturation ratios. Palaeogeography, Palaeoclimatology, Palaeoecology, 158(3-4), 259-280
-3.89782
32.7256
32.6805
41.3505
Eastern Basin
Mediterranean Sea
Kretische See
Aegyptian Sea
Levantine Sea