# Line Islands Survey and Coring Cruise Multi-sensor Track, Isotope and Radiocarbon Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using these data, # If there is no publication information, please cite investigator, title, online resource and date accessed. # # Online_Resource: http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID: # Online_Resource_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/polissar2014/mst # Online_Resource_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/polissar2014/isotopes # Online_Resource_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/polissar2014/radiocarbon # # Original_Source_URL: http://shadow.eas.gatech.edu/~jean/Line_Islands/Cruise_main.html # # Archive: Paleoceanography # #-------------------- # Contribution_Date # Date: 2014-04-23 #-------------------- # Title # Study_Name: Line Islands Survey and Coring Cruise Multi-sensor Track, Isotope and Radiocarbon Data #-------------------- # Investigators # Investigators: Lynch-Stieglitz, J.; Polissar, P. #-------------------- # Description_and_Notes # Description: Cruise MGL1208 data to characterize the sediments on the Line Islands Ridge and collect sediment cores suitable for paleoceanographic research. # # ISOTOPE METHODS: # Cores 15GC, 18GC, 20BB, 28BB, 31BB, 34BB, 35BB, 37BB (Georgia Tech): # Samples were dried overnight at 65°C, weighed, washed through 63 µm sieve with dionized water, and the washed samples were then dried overnight at 65°C. Fifteen specimens of G. ruber (white) were picked from the 250-355 µm size fraction and analyzed on a Thermo MAT253 with Kiel IV individual acid bath device. Values were converted to PDB via NBS-19 and an in-house standard, and NBS-18 values were monitored in each run. Replicate analyses of the in-house standard mixed in the sample runs yielded a 1-sigma standard deviation of .05‰ for d18O and 0.01‰ for d13C. # # Cores 6BB, 10GC, 11GC, 12GC, 17PC, 17TC, 19GC, 30BB (LDEO): # Samples were processed and analyzed at LDEO by Allison Jacobel with oversight by Polissar. Samples were freeze-dried, washed through a 63 µm sieve and the >63µm fraction dried at 45 °C overnight. Seven or eight specimens of G. ruber (white) were picked from the 250-355 µm size fraction, weighed and analyzed on a Thermo Delta V with Kiel IV individual acid bath device. Values were calibrated to the VPDB isotope scale with NBS-19 and NBS-18. Reproducibility of the in-house standard (1-sigma) is ±0.06 ‰ (d18O) and ±0.04 ‰ (d13C). # # Use and Attribution # These data are provided for the development of age models and as preliminary data for developing research projects on the MGL12-08 cores. The data and plots provided here may be freely used in funding proposals with appropriate attribution. Isotope data should be attributed as unpublished data, with this web site as the reference. Before using these data in a publication, please contact Jean Lynch-Stieglitz or Pratigya Polissar for further details and updates. # Isotope Analysis Strategy # Given the limited amount of time and number of analyses possible we strove to maximize the available stratigraphic information from the cores collected during MGL1208 as follows. # # 1) We used the very abundant planktonic foraminifera G. ruber to minimize picking time. However, this foraminifera can be more susceptible to dissolution effects than more robust foraminifera and the timing of surface water changes limits the precision to which these isotope records can be matched to a global benthic stack. # 2) We established 2 benchmark cores at the northern and southern portions of the transect (17PC, 37BB). As measured using the MST, these cores had density changes with depth that were typical for the cores taken during the cruise. For these cores we measured the oxygen isotopic composition from top to bottom of the core. # 3) All cores that had a clear match in MST density with the benchmark cores were not sampled and analyzed for oxygen isotopes. # 4) For the remaining cores that did not have a clear match in MST density with the benchmark cores, we analyzed the top 240cm of the core. We did not analyze cores that contained sediments at the top or near the top that were late Pleistocene in age based on the biostratigraphy performed on board (see cruise report for details). # # Radiocarbon Data: # Measurements were made at NOSAMS. Please consult their website for details on methods. # # Use and Attribution: Radiocarbon data are provided for the development of age models and as preliminary data for developing research projects on the MGL12-08 cores. The data and plots provided here may be freely used in funding proposals with appropriate attribution. Radiocarbon dates should be attributed as unpublished data, with this web site as the reference. Before using these data in a publication, please contact Jean Lynch-Stieglitz or Pratigya Polissar for further details and updates. #-------------------- # Publication # Authors: # Published_Date_or_Year: # Published_Title: # Journal_Name: # Volume: # Issue: # Pages: # DOI: # Abstract: # #--------------------- # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: #--------------------- # Site_Information # Site_Name: Line Islands Ridge # Location: Central Pacific Ocean # Northernmost_Latitude: # Southernmost_Latitude: # Easternmost_Longitude: # Westernmost_Longitude: # Elevation: #------------------ # Data_Collection # Collection_Name: # Earliest_Year: # Most_Recent_Year: # Time_Unit: # Core_Length: # Notes: #------------------ # Chronology: # # #------------------ # Variables # # Data line variables format: one variable per line, shortname- 9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # Data line format: tab-delimited text, variable short name as header ## #----------------- # Data: Full List of Site/Core Information Site Number Core Name Date (GMT) Time (GMT) Latitude degrees Latitude minutes Latitude NS Longitude degrees Longitude minutes Longitude EW Water depth (m) Core Type* Core Recovery (m) Number of Core Sectionsb 1 ML1208-01PC 5/1/2012 7:00 21 11.97 N 158 31.51 W 2960 PC 7.21 5 1 ML1208-01TC 5/1/2012 7:00 21 11.97 N 158 31.51 W 2960 TC 1.61 2 2 ML1208-02GC 5/5/2012 13:00 8 12.264 N 160 7.748 W 1349 GC 0.00 0 3 ML1208-03GC 5/6/2012 21:19 5 42.22 N 161 14.31 W 2088 GC 0.00 0 4 ML1208-04GC 5/7/2012 5:52 6 20.42 N 161 1.62 W 1866 GC 0.00 0 5 ML1208-05BB 5/7/2012 8:47 6 20.43 N 161 1.64 W 1863 BB 0.00 0 6 ML1208-06BB 5/7/2012 12:09 6 24.48 N 161 0.45 W 2371 BB 2.33 2 7 ML1208-07BB 5/7/2012 18:30 6 23.88755 N 160 46.11603 W 3163 BB 3.47 3 8 ML1208-08PC 5/8/2012 0:35 6 23.88 N 160 46.123 W 3163 PC 6.15 5 8 ML1208-08TC 5/8/2012 0:35 6 23.88 N 160 46.123 W 3163 TC 1.59 2 9 ML1208-09MC 5/8/2012 8:11 6 23.895 N 160 46.147 W 3163 MC 0.30 8 10 ML1208-10GC 5/8/2012 2:15 5 11.86 N 160 26.04 W 2933 GC 2.43 2 11 ML1208-11GC 5/10/2012 11:34 1 28.148 N 157 34.83 W 2942 GC 0.42 1 12 ML1208-12GC 5/12/2012 5:30 0 13.173 S 155 57.674 W 3050 GC 1.10 1 13 ML1208-13BB 5/12/2012 9:45 0 13.176 S 155 57.671 W 3050 BB 6.17 5 14 ML1208-14MC 5/12/2012 14:34 0 13.177 S 155 57.67 W 3049 MC 0.37 8 15 ML1208-15GC 5/13/2012 4:52 0 9.87 N 156 7.046 W 3597 GC 2.80 2 16 ML1208-16BB 5/13/2012 11:41 0 28.917 N 156 26.887 W 2926 BB 6.07 5 17 ML1208-17PC 5/13/2012 19:31 0 28.89 N 156 26.89 W 2926 PC 7.81 6 17 ML1208-17TC 5/13/2012 19:31 0 28.89 N 156 26.89 W 2926 TC 2.64 2 18 ML1208-18GC 5/14/2012 2:32 0 35.133 N 156 39.548 W 3362 GC 2.00 2 19 ML1208-19GC 5/14/2012 7:58 0 49.513 N 156 52.031 W 2956 GC 1.95 2 20 ML1208-20BB 5/14/2012 17:08 1 16.41 N 157 15.71 W 2850 BB 5.99 5 21 ML1208-21MC 5/14/2012 20:44 1 16.414 N 157 15.74 W 2850 MC 0.38 6 22 ML1208-22PC 5/15/2012 3:56 1 16.426 N 157 15.73 W 2850 PC 7.87 6 22 ML1208-22TC 5/15/2012 3:56 1 16.426 N 157 15.73 W 2850 TC 2.77 2 23 ML1208-23GC 5/15/2012 10:09 1 20.68 N 157 25.03 W 2995 GC 0.33 1 24 ML1208-24BB 5/16/2012 8:57 2 27.758 N 159 23.71 W 3538 BB 5.62 4 25 ML1208-25BB 5/16/2012 17:18 2 27.76 N 159 23.70 W 3542 BB 5.48 4 26 ML1208-26MC 5/17/2012 0:04 2 27.764 N 159 23.69 W 3545 MC 0.40 7 27 ML1208-27BB 5/17/2012 5:33 2 46.142 N 159 17.47 W 3331 BB 6.31 5 28 ML1208-28BB 5/17/2012 11:58 2 58.309 N 159 11.89 W 3153 BB 6.15 5 29 ML1208-29MC 5/17/2012 15:37 2 58.3 N 159 11.89 W 3152 MC 0.40 7 30 ML1208-30BB 5/18/2012 3:21 4 19.348 N 159 43.73 W 2660 BB 5.99 5 31 ML1208-31BB 5/18/2012 14:53 4 40.972 N 160 3.11 W 2857 BB 6.66 5 32 ML1208-32BB 5/18/2012 22:46 5 11.839 N 160 26.06 W 2926 BB 5.97 5 33 ML1208-33MC 5/19/2012 3:55 5 11.85 N 160 26.07 W 2933 MC 0.36 7 34 ML1208-34BB 5/19/2012 12:17 5 37.418 N 160 47.60 W 2963 BB 5.02 4 35 ML1208-35BB 5/20/2012 11:08 6 40.166 N 160 43.84 W 3777 BB 4.61 4 36 ML1208-36BB 5/20/2012 17:46 6 49.62 N 161 2.47 W 2855 BB 6.02 5 37 ML1208-37BB 5/21/2012 2:39 7 2.616 N 161 38.08 W 2798 BB 6.13 5 38 ML1208-38MC 5/21/2012 10:30 6 49.61 N 161 2.48 W 2859 MC 0.15 3 39 ML1208-39MC 5/21/2012 13:30 6 49.604 N 161 2.48 W 2859 MC 0.37 4 40 ML1208-40BB 5/22/2012 9:20 8 20.458 N 159 41.83 W 2998 BB 1.85 2 41 ML1208-41BB 5/23/2012 5:35 8 15.654 N 158 57.98 W 4705 BB 5.92 5 * PC, Piston core; TC, Trigger Core; GC, Gravity Core; MC, Multi-corer, BB, Gravity core with piston-core head Multi-sensor Track data files: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/polissar2014/MST Isotopes data files: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/polissar2014/isotopes Radiocarbon data files ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/polissar2014/radiocarbon