noaa-other-10752 eng; USA utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA World Data Service for Paleoclimatology Data Center Contact 828-271-4800 303-497-6513 325 Broadway, E/NE31 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact 2024-05-14 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Atlantic and Pacific Foraminiferal Amino Acid Racemization Data 2011-04-06 publication doi:10.25921/r26b-jy34 noaa-other-10752 NCEI DSI 1200_02 NCEI DSI 1200_01 Wehmiller, J.F. originator Wehmiller, J.F. author Hare, P.E. originator Hare, P.E. author NOAA National Centers for Environmental Information publisher tableDigital 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 Other Collections. The data include parameters of others with a geographic location of North Pacific Ocean. The time period coverage is from 438000 to 17000 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data. Data of past climate and environment derived from unusual proxy evidence. Parameter keywords describe what was measured in this data set. Additional summary information can be found in the abstracts of papers listed in the data set citations. completed NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA World Data Service for Paleoclimatology Data Center Contact 828-271-4800 303-497-6513 325 Broadway, E/NE31 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact https://www.ncei.noaa.gov/pub/data/paleo/webimages/pc-default-other.png Paleoclimatology - Other Collections PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Paleoclimate Reconstructions theme Global Change Master Directory (GCMD) Science Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian earth science > paleoclimate > others theme Global Change Master Directory (GCMD) Science Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Ocean > Pacific Ocean > North Pacific Ocean > V12-122 > LATITUDE 17 > LONGITUDE -74.4 place DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian otherRestrictions Cite as: Wehmiller, J.F.; Hare, P.E. (2011-04-06): NOAA/WDS Paleoclimatology - Atlantic and Pacific Foraminiferal Amino Acid Racemization Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/r26b-jy34. Accessed [date]. otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose otherRestrictions None otherRestrictions Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. Racemization of Amino Acids in Marine Sediments 1971 publication Wehmiller, J. and P.E. Hare author Science publisher https://doi.org/10.1126/science.173.4000.907 HTTPS Web Browser Associated Reference published 1971 Wehmiller, J. and P.E. Hare, 1971: Racemization of Amino Acids in Marine Sediments. Science, 173, 907-911, 10.1126/science.173.4000.907 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 438000 cal yr BP to 17000 cal yr BP; -74.4 -74.4 17 17 Study Coordinates 17 -74.4 -436050 -15050 STUDY NOTES: Concentration and D-alloisoleucine/L-isoleucine values from mixed foraminfera samples from sediment cores from Atlantic, Caribbean, and Pacific basins. Core Locations: Core Latitude Longitude WaterDepth(m) OceanBasin V12-122 17.00 -74.47 2730 A A179-4 16.60 -74.80 2965 A V16-205 15.40 -43.40 4045 A V16-39 -24.72 -4.75 4510 A V12-18 -28.70 -34.50 2935 A RC8-93 -29.37 -105.23 3157 P V23-110 17.63 -45.87 3746 A CH96-G12 30.27 -43.32 4014 A V24-28 15.32 -77.95 2274 A RC5-12 26.58 -56.48 5104 A A167-21 29.82 -76.58 1455 A V18 BBD 2 -17.93 -154.13 800 P JOIDES Leg 7, site 62-1 1.867 141.93 2591 P Leg 7, site 64-1 -1.73 158.60 2052 P Leg 6, site 47-2 32.45 157.72 2689 P LABORTAORY AND ANALYTICAL INFORMATION Lab history Lamont-Doherty Geological Observatory (LDGO) and Carnegie Institution of Washington, Geophysical Laboratory (GL CIW) Lab PI J. F. Wehmiller and P. E. Hare Preparation date 1969-1970 Pretreatment Sieve >74 µm, repeated sonication, distilled water wash (see "Sonication") AA fraction = AMINO FRACTION Hydrolysis procedure 22 or 46 hr at 110°C in 6 M HCl under N2 (see "Hydrolysis time") Bleach No Analytical method High pressure ion exchange liquid chromatography (IELC) Instrumental programming Buffer gradient; concentrations based on separate chromatograms of standards Area or height ratio Area Blank corrections none Response factors none Data screening criteria none Interlab comparisons none SAMPLE LOCATION INFORMATION Country or ocean Atlantic, Pacific State or province or sea Caribbean Locality descriptors = AREA Lat (°) = LAT (°N) Lon (°) = LON (°W) Coordinate precision Datum Elevation, m = WATER DEPTH (m) Elevation precision SAMPLE MATERIAL AND CONTEXT Material type = SAMPLE TYPE Genus Species Number of individuals Field context marine Field context core Field context stratified section Collection date Collector Wehmiller Sample PI Wehmiller Stratigraphic unit or age Numerical age = APPROX AGE, Ma Field ID = SITE NAME Field ID 1 = CORE DEPTH (cm) Field ID 2 Sample ID Fraction of shell Sample position RESULTS Lab code GL CIW Lab ID = Core, depth Number of chromatograms 1 Sample or analytical qualitsee reference AI = Alloisoleucine/Isoleucine Free field 1 = Alloisoleucine, nmole/gm Free field 2 = Isoleucine, nmole/gm Free field 3 = Hydrolysis time Free field 4 = Sonication ABSTRACT SUPPLIED BY ORIGINATOR: Isoleucine, one of several amino acids isolated from a suite of well-dated deep-sea cores, shows a progressive increase in the degree of racemization with the age of the sediment. Amino acids in sediments show an initial rate of racemization almost an order of magnitude faster than the rate observed for free amino acids at a comparable pH and temperature. The observed kinetics depend on a variety of diagenetic processes, but it appears that the ratio of alloisoleucine to isoleucine is a reliable indicator of age for samples less than 400,000 years old; for older samples the results are more ambiguous. Isoleucine is racemic in samples older than about 15 million years. NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information distributor In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. Native Format(s) https://doi.org/10.25921/r26b-jy34 HTTPS Landing Page Metadata Landing Page NCEI landing page with general information and links to access the data. information https://www.ncei.noaa.gov/access/paleo-search/study/10752 HTTPS Web Browser NOAA Study Page Study page with data access information. search https://www.ncei.noaa.gov/products/paleoclimatology/other-collections HTTPS Information NCEI Other Collections Page General information for this data type. information https://www.ncei.noaa.gov/pub/data/paleo/aar/wehmiller1971forams/wehmiller1971forams.xls HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/aar/wehmiller1971forams/wehmiller1971forams.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download asNeeded This ISO metadata record was translated from DIF metadata using dif-9x-to-iso-19115-2.xsl Version: 2022-06-21