NOAA/WDS Paleoclimatology - Global Alkenone UK37 Surface Sediment Database
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Paleoceanography. The data include parameters of paleoceanography with a geographic location of Global Ocean. The time period coverage is from 100 to 0 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
- Cite as: Tierney, J.E.; Tingley, M.P. (2018-02-01): NOAA/WDS Paleoclimatology - Global Alkenone UK37 Surface Sediment Database. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/k1a1-8c59. Accessed [date].
- Please refer to Credit tab for full citation information.
- doi:10.25921/k1a1-8c59
- noaa-ocean-23370
- NCEI DSI 1200_02
- NCEI DSI 1200_01
noaa-ocean-23370
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
Distributor | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | Data Center Contact
NOAA World Data Service for Paleoclimatology 828-271-4800 paleo@noaa.gov |
Coverage Description | Date Range: 100 cal yr BP to 0 cal yr BP; |
Time Period | 1850 to 1950 |
Spatial Bounding Box Coordinates |
N: 90
S: -80
E: 180
W: -180
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Data update frequency not available |
Supplemental Information |
ABSTRACT SUPPLIED BY ORIGINATOR: The alkenone‐based UK'37 proxy is a cornerstone of paleoclimatology, providing insight into the temperature history of the Earth's surface ocean. Although the relationship between UK'37 and sea surface temperatures (SSTs) is robust and well supported by experimental data, there remain outstanding issues regarding the seasonality of production of alkenones and the response of UK'37 at very warm and cold SSTs. Using a data set of over 1,300 core‐top UK'37 measurements, we find compelling evidence of seasonal production in the North Atlantic, North Pacific, and Mediterranean Oceans. We also find significant attenuation of the UK'37 response to SST at warm temperatures (>24C), with the slope reduced by nearly 50% as UK'37 approaches unity. To account for these observations in a calibration, we develop a new Bayesian B‐spline regression model, BAYSPLINE, for theUK'37 paleothermometer. BAYSPLINE produces similar estimates as previous calibrations below ~24 degrees, but above this point it predicts larger SST changes, in accordance with the attenuation of the UK'37 response. Example applications of BAYSPLINE demonstrate that its treatment of seasonality and slope attenuation improves paleoclimatic interpretations, with important consequences for the inference of SSTs in the tropical oceans. BAYSPLINE facilitates a probabilistic approach to paleoclimate, building upon growing efforts to develop more formalized statistical frameworks for paleoceanographic reconstruction.
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Purpose | Records of past climate and ocean circulation derived from marine sediments. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. |
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Theme keywords | Global Change Master Directory (GCMD) Science Keywords
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Last Modified: 2024-04-08
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