# Florida Strait Nd Isotopic Ratio Data over the last 25,000 Years #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Online_Resource: http://www.ncdc.noaa.gov/paleo/study/17372 # Online_Resource: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/xie2012-poc/xie2012-poc-26jpc.txt # # Archive: Paleoceanography # #-------------------------------- # Contribution_Date # Date: 2014-10-27 #-------------------------------- # Title: Florida Strait Nd Isotopic Ratio Data over the last 25,000 Years #-------------------------------- # Investigators: Xie, Ruifang C.; Marcantonio, Franco; Schmidt, M.W. #-------------------- # Description and Notes: # Description: # #-------------------- # Publication # Authors: Xie, R.C., F. Marcantonio, and M.W. Schmidt # Journal_Name: Paleoceanography # Published_Title: Deglacial variability of the penetration of Antarctic Intermediate Water into the North Atlantic from authigenic neodymium isotope ratios # Published_Date_or_Year: 2012 # Volume: 27 # Report Number: PA3221 # Pages: # DOI: 10.1029/2012PA002337 # Abstract: Understanding intermediate water circulation across the last deglacial is critical in assessing the role of oceanic heat transport associated with Atlantic Meridional Overturning Circulation variability across abrupt climate events. However, the links between intermediate water circulation and abrupt climate events such as the Younger Dryas (YD) and Heinrich Event 1 (H1) are still poorly constrained. Here, we reconstruct changes in Antarctic Intermediate Water (AAIW) circulation in the subtropical North Atlantic over the past 25 kyrs by measuring authigenic neodymium isotope ratios in sediments from two sites in the Florida Straits. Our authigenic Nd isotope records suggest that there was little to no penetration of AAIW into the subtropical North Atlantic during the YD and H1. Variations in the northward penetration of AAIW into the Florida Straits documented in our authigenic Nd isotope record are synchronous with multiple climatic archives, including the Greenland ice core δ18O record, the Cariaco Basin atmosphere ∆14C reconstruction, the Bermuda Rise sedimentary Pa/Th record, and nutrient and stable isotope data from the tropical North Atlantic. The synchroneity of our Nd records with multiple climatic archives suggests a tight connection between AAIW variability and high-latitude North Atlantic climate change. #-------------------------------- # Funding_Agency: # Funding_Agency_Name: # Grant: #-------------------------------- # Site Information: # Site_Name: KNR166-2-26JPC # Location: North Atlantic Ocean # Northernmost_Latitude: 24.327 # Southernmost_Latitude: 24.327 # Easternmost_Longitude: -83.252333 # Westernmost_Longitude: -83.252333 # Elevation: -546 #-------------------------------- # Data Collection # Collection_Name K166-2-26JPC Nd Isotopes Xp12 # Oldest_Year: 22540 # Most_Recent_Year: 710 # Time_Unit: cal yr BP # Core_Length # Notes: #-------------------------------- # Chronology #-------------------------------- # Variables # # Data variables follow (have double marker- "##") # Data line variables format: Variables list, one per line, shortname-tab-nine components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## age_calkaBP Age,,,calendar kiloyears before present,,,,,N ## 143Nd/144Nd-fm Neodymium 143/Neodymium 144 ratio,,, ,,paleoceanography,Fe-Mn oxyhydroxide fraction,,N ## 143Nd/144Nd-fm_err Neodymium 143/Neodymium 144, error  Fe-Mn oxyhydroxide fraction,,N ## e-Nd-fm epsilon-Neodymium,,,  ,,paleoceanography,Fe-Mn oxyhydroxide fraction,,N ## e-Nd-fm_std epsilon-Neodymium standard deviation,,,  ,,paleoceanography,Fe-Mn oxyhydroxide fraction,,N ## 143Nd/144Nd-det Neodymium 143/Neodymium 144  ,,paleoceanography,detrital fraction,,N ## 143Nd/144Nd-det_err Neodymium 143/Neodymium 144 ratio,,error, ,,paleoceanography,detrital fraction,,N ## e-Nd-det epsilon-Neodymium,,,  ,,paleoceanography,detrital fraction,,N ## e-Nd-det_std epsilon-Neodymium standard deviation,,, ,,paleoceanography,detrital fraction,,N # Data: # Missing Value: NaN age_calkaBP 143Nd/144Nd-fm 143Nd/144Nd-fm_err e-Nd-fm e-Nd-fm_std 143Nd/144Nd-det 143Nd/144Nd-det_err e-Nd-det e-Nd-det_std 2.5 0.71 NaN NaN NaN NaN 0.512076 2 -10.97 0.03 3 0.74 0.512218 2 -8.20 0.04 NaN NaN NaN NaN 31 1.99 0.512201 2 -8.53 0.05 NaN NaN NaN NaN 31.5 2.01 0.512205 2 -8.45 0.04 NaN NaN NaN NaN 79 4.92 0.512194 3 -8.65 0.06 0.512170 2 -9.13 0.04 79 4.92 0.512194 2 -8.67 0.04 NaN NaN NaN NaN 79.5 4.95 0.512192 3 -8.69 0.06 NaN NaN NaN NaN 119 7.53 0.512215 3 -8.25 0.06 0.512146 2 -9.60 0.04 119.5 7.55 0.512211 4 -8.34 0.07 NaN NaN NaN NaN 207 10.18 0.512213 2 -8.29 0.04 NaN NaN NaN NaN 207.5 10.19 0.512203 2 -8.48 0.04 NaN NaN NaN NaN 300 11.25 0.512230 2 -7.96 0.04 NaN NaN NaN NaN 390.5 11.77 0.512155 2 -9.42 0.05 NaN NaN NaN NaN 443 12.08 0.512148 2 -9.56 0.05 NaN NaN NaN NaN 443.5 12.09 NaN NaN NaN NaN 0.512093 2 -10.63 0.03 497 12.36 0.512154 2 -9.44 0.05 NaN NaN NaN NaN 497.5 12.36 0.512159 5 -9.35 0.11 0.512116 2 -10.18 0.04 497.5 12.36 0.512145 2 -9.63 0.04 NaN NaN NaN NaN 498 12.36 0.512164 3 -9.25 0.06 NaN NaN NaN NaN 515 12.42 0.512143 2 -9.65 0.04 0.512105 2 -10.39 0.03 515.5 12.42 0.512171 2 -9.11 0.05 NaN NaN NaN NaN 540.5 12.50 0.512167 4 -9.19 0.09 NaN NaN NaN NaN 541 12.50 0.512162 6 -9.29 0.12 NaN NaN NaN NaN 580.5 12.77 0.512147 11 -9.58 0.22 0.512095 2 -10.59 0.04 581 12.78 0.512168 2 -9.18 0.05 NaN NaN NaN NaN 645 13.73 0.512172 5 -9.08 0.09 0.512071 2 -11.06 0.05 645 13.73 0.512165 2 -9.23 0.05 NaN NaN NaN NaN 653 13.96 NaN NaN NaN NaN 0.512011 2 -12.23 0.03 653.5 13.98 0.512163 3 -9.26 0.06 NaN NaN NaN NaN 659 14.18 0.512169 4 -9.15 0.07 NaN NaN NaN NaN 659.5 14.20 0.512181 4 -8.92 0.08 NaN NaN NaN NaN 672.5 14.68 0.512185 4 -8.84 0.07 NaN NaN NaN NaN 673 14.70 NaN NaN NaN NaN 0.511996 2 -12.53 0.03 678.5 14.90 0.512168 2 -9.17 0.04 NaN NaN NaN NaN 680.5 14.98 0.512169 2 -9.14 0.04 NaN NaN NaN NaN 681 14.99 0.512181 2 -8.91 0.04 NaN NaN NaN NaN 690.5 15.35 0.512187 5 -8.80 0.11 NaN NaN NaN NaN 691 15.37 0.512194 3 -8.67 0.06 NaN NaN NaN NaN 709 16.10 0.512159 2 -9.35 0.04 0.512105 3 -10.40 0.06 709.5 16.12 0.512156 2 -9.40 0.04 NaN NaN NaN NaN 715 16.40 0.512146 2 -9.60 0.04 0.512062 2 -11.23 0.04 715.5 16.42 0.512146 3 -9.59 0.05 NaN NaN NaN NaN 720.5 16.67 0.512154 3 -9.43 0.06 NaN NaN NaN NaN 721 16.70 0.512151 2 -9.49 0.04 NaN NaN NaN NaN 730 17.15 0.512162 4 -9.29 0.07 0.512060 2 -11.27 0.03 730 17.15 0.512161 1 -9.31 0.03 NaN NaN NaN NaN 730.5 17.18 0.512152 1 -9.48 0.03 NaN NaN NaN NaN 750.5 18.18 0.512171 2 -9.10 0.04 NaN NaN NaN NaN 751 18.21 0.512191 2 -8.71 0.04 0.512053 2 -11.40 0.04 766.5 19.08 0.512175 2 -9.02 0.03 NaN NaN NaN NaN 767 19.11 0.512177 2 -9.00 0.04 NaN NaN NaN NaN 780.5 19.88 0.512182 2 -8.90 0.04 0.512064 2 -11.19 0.04 780.5 19.88 0.512191 2 -8.73 0.04 NaN NaN NaN NaN 781 19.91 0.512182 3 -8.90 0.05 NaN NaN NaN NaN 797 20.82 0.512185 2 -8.83 0.03 NaN NaN NaN NaN 797.5 20.85 0.512185 2 -8.83 0.04 NaN NaN NaN NaN 802.5 21.14 0.512180 2 -8.94 0.04 0.512059 2 -11.30 0.04 803 21.17 0.512176 2 -9.02 0.04 NaN NaN NaN NaN 810.5 21.59 0.512205 2 -8.44 0.03 NaN NaN NaN NaN 811 21.62 0.512182 2 -8.89 0.04 NaN NaN NaN NaN 814.5 21.82 0.512183 4 -8.87 0.07 NaN NaN NaN NaN 815 21.85 0.512183 2 -8.89 0.04 NaN NaN NaN NaN 818.5 22.05 0.512231 4 -7.94 0.08 NaN NaN NaN NaN 819 22.08 0.512185 2 -8.83 0.02 NaN NaN NaN 820.5 22.17 0.512179 2 -8.94 0.05 NaN NaN NaN NaN 821 22.19 0.512186 2 -8.81 0.04 NaN NaN NaN NaN 826.5 22.51 0.512193 2 -8.68 0.04 NaN NaN NaN NaN 827 22.54 0.512193 5 -8.67 0.10 NaN NaN NaN NaN