# San Lazaro Basin, Eastern Pacific 2,300 Year Sediment Geochemical Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/19101 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/abella-gutierrez2015/abella-gutierrez2015bap96-6c.txt # # Original_Source_URL: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleoceanography # # Parameter_Keywords: Geochemistry #-------------------- # Contribution_Date # Date: 2015-08-05 #-------------------- # Title # Study_Name: San Lazaro Basin, Eastern Pacific 2,300 Year Sediment Geochemical Data #-------------------- # Investigators # Investigators: Abella-Gutierrez, J.L.; Herguera, J.C. #-------------------- # Description_Notes_and_Keywords # Description: Sediment geochemical data (carbonate percentage and Br/Si ratio) from 5 cores collected in the San Lázaro Basin # (also called Soledad Basin) off Baja California, Mexico, in the Eastern Pacific Ocean (25deg. 10'N, 112deg. 45'W). # Sediment carbonate content is used as a proxy of water column stratification. Data are from cores BAP96-5C, BAP96-6C, PCM00-78K, CA94-9K, # CA94-8K, and CH94-2K, plus a composite record. These cores were also used in: # Esparza-Alvarez, M. A., J. C. Herguera, and C. Lange (2007), Last century patterns of sea surface temperatures and diatom # (>38 um) variability in the Southern California current, Mar. Micropaleontol., 64(1-2), 18-35, doi:10.1016/j.marmicro.2007.01.001. # #-------------------- # Publication # Authors: Jose Abella‐Gutierrez, Juan Carlos Herguera # Published_Date_or_Year: 2016-07-01 # Published_Title: Carbonate variability in the Southern California Current System at different time scales for the last 2Kyr # Journal_Name: Paleoceanography # Volume: 31 # Edition: # Issue: 7 # Pages: 953-970 # Report_Number: # DOI: 10.1002/2015PA002872 # Online_Resource: http://onlinelibrary.wiley.com/doi/10.1002/2015PA002872/abstract # Full_Citation: # Abstract: The San Lazaro Basin (SLB) sediment record is highly sensitive to the El Nino–Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) due to its location vertically underlying the dynamic boundary between the northern, cooler and fresher waters of the California Current System (CCS) and the southern, warmer and saltier surface waters from the subtropics and tropics. Warm sea surface temperatures (SSTs) and the ensuing stratified surface water column favor carbonate productivity, mostly dominated by the export of coccolithophorids as observed during El Nino events, while cool SSTs and a less stratified water column favor a relatively higher export of organic carbon. Here we show how during the last two millennia, the mechanisms that drive the organic carbon and carbonate export depend on the time scale considered. The organic carbon and carbonate records show opposite trends for the past 2000 years. On multicentennial periodicities, their variability is probably a result of precessional forcing and associated decreasing Northern Hemisphere insolation, which has been shown to affect the migration of the Intertropical Convergence Zone and the polar jet stream. On shorter time scales, interannual to centennial, the SLB records exhibit an ENSO-like variability; similarly, decadal to multidecadal variability is correlated with instrumental and reconstructed PDO records. We further show how interannual variance seems to have increased during the Little Ice Age, most likely related to large ENSO events, in contrast with an apparent reduction in this type of variability between 400 and 1350 Common Era, suggesting a changing sensitivity of the ENSO teleconnection in the southern CCS for the past two millennia. #-------------------- # Funding_Agency # Funding_Agency_Name: IAI # Grant: UCAR97-73970 #------------------ # Funding_Agency # Funding_Agency_Name: CONACyT # Grant: SEP04-C01-46152, CB-2009-01-130095 #------------------ # Site_Information # Site_Name: BAP96-6-C # Location: Ocean>Pacific Ocean>Eastern Pacific Ocean # Country: # Northernmost_Latitude: 25.2163 # Southernmost_Latitude: 25.2163 # Easternmost_Longitude: -112.7333 # Westernmost_Longitude: -112.7333 # Elevation: -528 m #------------------ # Data_Collection # Collection_Name: Abella2015BAP96-6-C # Earliest_Year: 61 # Most_Recent_Year: -45 # Time_Unit: Cal. Year BP # Core_Length: 0.260 m # Notes: #------------------ # Chronology_Information # Chronology: # 210Pb and 214Pb measurements for BAP96-6C are available in: Esparza-Alvarez, M. A., J. C. Herguera, and C. Lange (2007), # Last century patterns of sea surface temperatures and diatom (>38 um) variability in the Southern California current, # Mar. Micropaleontol., 64(1-2), 18–35, doi:10.1016/j.marmicro.2007.01.001. # # 14C ages. All measurements were made on mixed planktonic foraminifera and converted to calendar age using a reservoir age of 650+/-50 years. # # Core depth_interval core_depth composite_depth 14C_Age Year(AD/BC) Age_range # CA94-9K-II 19 380 469 845 1685 258 # CA94-9K-II 19 570 665 1100 1505 250 # CA94-9K-II 13 675 792 1220 1385 150 # CA94-9K-II 13 785 880 1440 1250 300 # CA94-9K-III 16 895 994 1340 1290 300 # CA94-9K-III 17 1045 1140 1620 1035 250 # CA94-9K-III 44 1205 1266 1710 930 320 # CA94-9K-III 13 1320 1399 1860 790 220 # # CH94-2K-IV 18 1262 1488 2070 565 257 # CH94-2K-IV 8 1701 1922 2410 181 267 # CH94-2K-V 2 1836 2077 2535 133 346 # CH94-2K-V 9 2154 2375 2840 -318 363 #------------------ # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ## depth_mm depth, , , mm, , , , ,N ## carb% calcium carbonate, sediment, -+0.1, percent, ,paleoceanography, , coulometry,N # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # depth_mm carb% 1.0 26.17 3.0 26.17 5.0 24.96 7.0 24.96 9.0 24.38 11.0 24.38 13.0 21.86 15.0 21.86 17.0 23.42 19.0 23.42 21.0 24.25 23.0 24.25 25.0 24.25 27.0 24.92 29.0 24.92 31.0 24.08 33.0 24.08 35.0 25.58 37.0 25.58 39.0 25.96 41.0 25.96 43.0 22.72 45.0 22.72 47.0 24.25 49.0 24.25 51.0 24.46 53.0 24.46 55.0 24.07 57.0 24.07 59.0 22.64 61.0 22.64 63.0 24.56 65.0 24.76 67.0 23.48 69.0 23.65 71.0 19.63 73.0 23.71 75.0 23.01 77.0 23.07 79.0 24.65 81.0 24.65 83.0 25.28 85.4 25.28 87.8 23.00 90.2 23.00 92.6 24.29 95.0 23.29 97.3 23.13 99.7 22.43 102.1 21.60 104.5 21.60 106.9 22.04 109.3 22.04 111.7 21.60 114.1 21.60 116.5 20.94 118.9 20.94 121.2 21.91 123.6 21.91 126.0 23.20 127.7 23.20 129.4 22.01 131.0 22.01 132.7 20.59 134.4 21.70 136.1 21.70 137.8 21.02 139.4 21.02 141.1 20.91 142.8 20.91 144.5 22.11 146.2 22.11 147.8 22.69 149.0 21.95 150.3 21.95 151.5 21.12 152.8 21.12 154.0 21.82 155.2 21.82 156.5 20.90 157.7 20.90 159.0 22.84 160.2 23.84 161.4 25.33 162.7 26.33 163.9 25.25 165.2 25.25 166.4 25.25 167.6 25.25 168.9 25.17 170.1 25.17 171.4 24.17 172.6 22.17 173.8 25.17 175.1 25.17 176.3 24.17 177.6 23.17 178.8 22.17 180.0 26.25 181.1 26.25 182.2 26.50 183.3 25.58 184.4 25.60 185.6 24.83 186.7 25.92 187.8 25.91 188.9 24.17 190.0 24.17 191.1 24.25 192.2 23.92 193.3 21.92 194.4 21.92 195.5 23.92 196.7 24.08 197.8 24.08 198.9 23.92 200.0 25.20 201.6 25.92 203.1 25.92 204.7 26.17 206.2 26.17 207.8 26.42 209.4 24.42 210.9 23.25 212.5 21.25 214.0 22.83 215.6 25.83 217.2 26.42 218.7 26.42 220.3 25.42 221.8 25.42 223.4 25.25 225.0 25.25 226.5 22.50 228.1 22.50 229.6 20.50 231.2 20.50 232.8 24.58 234.3 24.58 235.9 24.42 237.4 24.42 239.0 22.78 240.6 22.78 242.1 22.78 243.7 22.86 245.2 22.86 246.8 22.82 248.4 22.82 250.0 26.45 251.4 26.45