Citation:

PANGAEA.965068 (dataset in review)

Name: Alkenone paleotemperatures and concentrations in Miocene sediments from ODP Site 884 in the subpolar North Pacific
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Alkenone; alkenone concentration; alkenone SST; middle Miocene; Middle Miocene Climate Transition; Miocene Climatic Optimum; North Pacific Ocean; Uk´37; UK37

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Abstract:

We measured the unsaturation index (Uk'37) and concentration of C37 alkenones in sediment samples from Ocean Drilling Program (ODP) Site 884 to quantify the evolution of sea surface temperatures (SSTs) in the western subpolar North Pacific throughout the Miocene. To calculate SSTs, we applied the linear core-top calibration of Müller et al. (1998). Alkenones were measured using a gas chromatograph with a flame ionization detector, Agilent Technologies, 7890/8890 equipped with an Agilent DB-1 column (60 m length, 0.32 mm diameter, 0.10 µm film thickness). C37 alkenone concentrations were quantified using internal standards of n-hexatricontane and n-heptatriacontane and were normalized to the dry mass of sediment extracted for each sample.

Keyword(s):

Alkenone; alkenone concentration; alkenone SST; middle Miocene; Middle Miocene Climate Transition; Miocene Climatic Optimum; North Pacific Ocean; Uk´37; UK37

Supplement to:

Nirenberg, Jared; Herbert, Timothy D (in prep.): Globally synchronous high-latitude warmth during the Early-Middle Miocene.

References:

Müller, Peter J; Kirst, Georg; Ruhland, Götz; Von Storch, Isabel; Rosell-Melé, Antoni (1998): Calibration of the alkenone paleotemperature index UK'37 based on core-tops from the eastern South Atlantic and the global ocean (60°N-60°S). Geochimica et Cosmochimica Acta, 62(10), 1757-1772, https://doi.org/10.1016/S0016-7037(98)00097-0

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: 51.450400 * Longitude: 168.337100

Date/Time Start: 1992-08-20T18:00:00 * Date/Time End: 1992-08-24T11:00:00

Minimum DEPTH, sediment/rock: 431.10 m * Maximum DEPTH, sediment/rock: 603.85 m

Event(s):

145-884B * Latitude: 51.450400 * Longitude: 168.337100 * Date/Time Start: 1992-08-20T18:00:00 * Date/Time End: 1992-08-24T11:00:00 * Elevation: -3836.0 m * Penetration: 853.9 m * Recovery: 791.76 m * Location: North Pacific Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 91 core; 853.9 m cored; 0 m drilled; 92.7 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Sample code/label	Sample label		Nirenberg, Jared	DSDP/ODP/IODP sample designation
2	DEPTH, sediment/rock	Depth sed	m	Nirenberg, Jared		Geocode – mbsf
3	AGE	Age	ka BP	Nirenberg, Jared		Geocode
4	Alkenone, unsaturation index UK'37	UK'37		Nirenberg, Jared	Calculated from UK'37 (Prahl and Wakeham, 1987)
5	Sea surface temperature, annual mean	SST (1-12)	°C	Nirenberg, Jared	Calculated from UK'37 (Müller et al, 1998)
6	Alkenone, C37 per unit sediment mass	C37/sed	µg/g	Nirenberg, Jared	Gas chromatograph with flame ionization detector (GC-FID), Agilent Technologies, Agilent 7890 / 8890 GC; coupled with Agilent DB-1 column	dry mass

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

4644 data points

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