NOAA/WDS Paleoclimatology - Blake Bahama Outer Ridge and Humber Estuary, UK Oxidizing Pre-Treatments on Amino Acids Data over the last 900ka
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 North Atlantic Ocean. The time period coverage is from 905400 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: Millman, E.; Wheeler, L.J.; Billups, K.; Kaufman, D.S.; Penkman, K.E.H. (2023-08-01): NOAA/WDS Paleoclimatology - Blake Bahama Outer Ridge and Humber Estuary, UK Oxidizing Pre-Treatments on Amino Acids Data over the last 900ka. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/ychn-zy41. Accessed [date].
- Please refer to Credit tab for full citation information.
- doi:10.25921/ychn-zy41
- noaa-ocean-38379
- NCEI DSI 1200_02
- NCEI DSI 1200_01
noaa-ocean-38379
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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: 905400 cal yr BP to 0 cal yr BP; |
Time Period | -903450 to 1950 |
Spatial Bounding Box Coordinates |
N: 54
S: 28.246483
E: 0
W: -76.330417
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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: Amino acid racemization (AAR) is a geochronological method that uses the ratio of D- to L- configurations in optically active amino acids from carbonate fossils to determine the time elapsed since the death of an organism. Although AAR techniques have been widely applied to foraminiferal tests, there have been limited dedicated assessments of the potential of isolating a bleach-resistant, intra-crystalline fraction of proteins to improve the reliability of AAR in this biomineral system. In this study, we evaluate the effect of two oxidative pre-treatments (hydrogen peroxide and bleach) on amino acid concentrations and D/L values in sub-modern benthic foraminifers (Ammonia spp. and Haynesina germanica) and well-preserved mid Holocene and mid Pleistocene planktic foraminifers (Pulleniatina obliquiloculata, Globorotalia truncatulinoides, and Globorotalia tumida). The oxidative pre-treatments successfully reduced the amino acid content of the foraminiferal tests to a residual fraction, and with the exception of Ammonia spp., neither pre-treatment substantially affected the relative proportion of individual amino acids. The bleaching pre-treatment does not consistently alter D/L values when compared to peroxide pre-treatment, but it does tend to reduce the subsample variability in D/L values, albeit only to a small degree in an inconsistent fashion. Therefore, we recommend that a relatively weak oxidative pre-treatment with 3% hydrogen peroxide is sufficient for foraminifera-based AAR applications.
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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: 2023-09-01
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