# 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-31jpc.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: KNR166-2-31JPC # Location: North Atlantic Ocean # Northernmost_Latitude: 24.219667 # Southernmost_Latitude: 24.219667 # Easternmost_Longitude: -83.295833 # Westernmost_Longitude: -83.295833 # Elevation: -751 #-------------------------------- # Data Collection # Collection_Name K166-2-31JPC Nd Isotopes Xp12 # Oldest_Year: 24360 # Most_Recent_Year: 1810 # 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 ratio,,2s error, ,,paleoceanography,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,,2s 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 5.5 1.81 0.512216 3 -8.23 0.06 NaN NaN NaN NaN 8.5 2.17 0.512204 2 -8.47 0.04 0.512099 3 -10.51 0.05 28.5 4.57 0.512184 2 -8.85 0.05 0.512133 2 -9.85 0.05 64.5 7.90 0.512199 2 -8.56 0.05 0.512137 2 -9.77 0.04 65 8.03 0.512190 1 -8.75 0.03 NaN NaN NaN NaN 73.5 10.03 0.512208 3 -8.38 0.05 0.512059 2 -11.30 0.05 89 11.79 0.512145 3 -9.62 0.05 NaN NaN NaN NaN 89.5 11.84 0.512141 2 -9.70 0.04 NaN NaN NaN NaN 90.5 11.95 0.512148 2 -9.56 0.05 0.512105 3 -10.40 0.06 93.5 12.26 0.512158 3 -9.36 0.05 NaN NaN NaN NaN 95 12.42 0.512158 2 -9.36 0.03 NaN NaN NaN NaN 111 13.44 0.512158 2 -9.37 0.03 NaN NaN NaN NaN 111 13.44 0.512171 3 -9.11 0.07 NaN NaN NaN NaN 111.5 13.47 0.512204 3 -8.48 0.06 0.512056 3 -11.35 0.06 130.5 14.94 0.512153 1 -9.46 0.03 NaN NaN NaN NaN 131 14.97 0.512149 2 -9.54 0.03 NaN NaN NaN NaN 140.5 15.71 0.512158 2 -9.36 0.03 0.512073 2 -11.03 0.04 150.5 16.60 0.512201 2 -8.52 0.04 NaN NaN NaN NaN 151 16.74 0.512179 2 -8.95 0.04 NaN NaN NaN NaN 152.5 17.18 0.512184 2 -8.86 0.03 NaN NaN NaN NaN 153 17.33 0.512177 3 -8.99 0.06 NaN NaN NaN NaN 158.5 18.94 0.512183 2 -8.87 0.04 NaN NaN NaN NaN 177 24.36 0.512191 2 -8.72 0.03 0.512012 3 -12.22 0.05