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Li, Liangquan; Keller, Gerta (1998): (Table 1) Sea-surface temperatures, intermediate-water temperatures, and latitudinal gradient at three time slices at the end of the Cretaceous [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.712434

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Abstract:
Climatic and oceanographic variations during the last 2 m.y. of the Maastrichtian inferred from high-resolution (10 k.y.) stable isotope analysis of the mid-latitude South Atlantic Deep Sea Drilling Project Site 525 reveal a major warm pulse followed by rapid cooling prior to the Cretaceous-Tertiary boundary. Between 66.85 and 65.52 Ma, cool but fluctuating temperatures average 9.9 and 15.4°C in intermediate and surface waters, respectively. This interval is followed by an abrupt short-term warming between 65.45 and 65.11 Ma, which increased temperatures by 2-3°C in intermediate waters, and decreased the vertical thermal gradient to an average of 2.7°C. This warm pulse may be linked to increased atmospheric pCO2, increased poleward heat transport, and the switch of an intermediate water source from high to low-middle latitudes. During the last 100 k.y. of the Maastrichtian, intermediate and surface temperatures decreased by an average of 2.1 and 1.4°C, respectively, compared to the maximum temperature between 65.32 and 65.24 Ma.
Related to:
Li, Liangquan; Keller, Gerta (1998): Abrupt deep-sea warming at the end of the Cretaceous. Geology, 26(11), 995-998, https://doi.org/10.1130/0091-7613(1998)026%3C0995:ADSWAT%3E2.3.CO;2
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -47.115683 * Median Longitude: 2.095083 * South-bound Latitude: -65.160667 * West-bound Longitude: 1.204867 * North-bound Latitude: -29.070700 * East-bound Longitude: 2.985300
Date/Time Start: 1980-06-10T00:00:00 * Date/Time End: 1987-01-23T00:00:00
Minimum Elevation: -2925.0 m * Maximum Elevation: -2467.0 m
Event(s):
74-525  * Latitude: -29.070700 * Longitude: 2.985300 * Date/Time: 1980-06-10T00:00:00 * Elevation: -2467.0 m * Penetration: 3.6 m * Recovery: 3.6 m * Location: South Atlantic/CREST * Campaign: Leg74 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 cores; 3.6 m cored; 0 m drilled; 99.7 % recovery
113-690  * Latitude: -65.160667 * Longitude: 1.204867 * Date/Time Start: 1987-01-19T00:00:00 * Date/Time End: 1987-01-23T00:00:00 * Elevation: -2925.0 m * Penetration: 542.3 m * Recovery: 401.7 m * Location: South Atlantic Ocean * Campaign: Leg113 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 49 cores; 421.7 m cored; 0 m drilled; 95.3% recovery
Comment:
Site 113-690 data from Stott and Kennett (1990; doi:10.2973/odp.proc.sr.113.158.1990)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEvent
2 CommentCommentLi, Liangquantime slices
3 Age, minimum/youngAge minkaLi, Liangquan
4 Age, maximum/oldAge maxkaLi, Liangquan
5 Temperature, waterTemp°CLi, Liangquanof sea surface, averaged
6 Temperature, waterTemp°CLi, Liangquanof intermediate water, averaged
7 GradientgraddegLi, Liangquanof sea surface temperature at middle-high latitudes (°C per 1° latitude)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
48 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Event		2 
Comment
(time slices)		3 
Age min [ka]		4 
Age max [ka]		5 
Temp [°C]
(of sea surface, averaged)		6 
Temp [°C]
(of intermediate water, averaged)		7 
grad [deg]
(of sea surface temperature at...)
113-690 TS3650006510010.39.0
113-690TS2654506511011.79.3
113-690TS165720655209.86.7
74-525 TS3650006510014.311.00.14
74-525TS2654506511015.212.50.12
74-525TS2c652406511014.812.3
74-525TS2b653206524015.713.1
74-525TS2a654506532015.212.3
74-525TS1657206552015.010.10.18