# Laguna La Gaiba, Bolivia 40 KYr Leaf Wax Carbon and Hydrogen Isotope Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # 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. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: http://www.ncdc.noaa.gov/paleo/study/19848 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/bolivia/gaiba2016iso.txt # # Archive: Paleolimnology # # Parameter_Keywords: carbon isotopes, hydrogen isotopes, geochemistry #--------------------------------------- # Contribution_Date # Date: 2016-03-04 #--------------------------------------- # Title # Study_Name: Laguna La Gaiba, Bolivia 40 KYr Leaf Wax Carbon and Hydrogen Isotope Data #--------------------------------------- # Investigators # Investigators: Fornace, K.L.; Whitney, B.S.; Galy, V.; Hughen, K.A.; Mayle, F.E. #--------------------------------------- # Description and Notes # Description: Leaf wax (C27-C33 n-alkane) carbon and hydrogen isotope data from Laguna La Gaiba sediments. # Provided Keywords: Pantanal, leaf wax, compound-specific stable isotopes, South American Summer Monsoon, last glacial period, Holocene #--------------------------------------- # Publication # Authors: Kyrstin L. Fornace, Bronwen S. Whitney, Valier Galy, Konrad A. Hughen, Francis E. Mayle # Published_Date_or_Year: 2016-03-15 # Published_Title: Late Quaternary environmental change in the interior South American tropics: new insight from leaf wax stable isotopes # Journal_Name: Earth and Planetary Science Letters # Volume: 438 # Edition: # Issue: # Pages: 75-85 # Report Number: # DOI: 10.1016/j.epsl.2016.01.007 # Online_Resource: http://www.sciencedirect.com/science/article/pii/S0012821X16000145 # Full_Citation: # Abstract: Stable isotope analysis of leaf waxes in a sediment core from Laguna La Gaiba, a shallow lake located at the Bolivian margin of the Pantanal wetlands, provides new perspective on vegetation and climate change in the lowland interior tropics of South America over the past 40,000 years. The carbon isotopic compositions (d13C) of long-chain n-alkanes reveal large shifts between C3- and C4-dominated vegetation communities since the last glacial period, consistent with landscape reconstructions generated with pollen data from the same sediment core. Leaf wax d13C values during the last glacial period reflect an open landscape composed of C4 grasses and C3 herbs from 41-20 ka. A peak in C4 abundance during the Last Glacial Maximum (LGM, ~21 ka) suggests drier or more seasonal conditions relative to the earlier glacial period, while the development of a C3-dominated forest community after 20 ka points to increased humidity during the last deglaciation. Within the Holocene, large changes in the abundance of C4 vegetation indicate a transition from drier or more seasonal conditions during the early/mid-Holocene to wetter conditions in the late Holocene coincident with increasing austral summer insolation. Strong negative correlations between leaf wax d13C and image values over the entire record indicate that the majority of variability in leaf wax image at this site can be explained by variability in the magnitude of biosynthetic fractionation by different vegetation types rather than changes in meteoric water image signatures. However, positive image deviations from the observed d13C-image trends are consistent with more enriched source water and drier or more seasonal conditions during the early/mid-Holocene and LGM. Overall, our record adds to evidence of varying influence of glacial boundary conditions and orbital forcing on South American Summer Monsoon precipitation in different regions of the South American tropics. Moreover, the relationships between leaf wax stable isotopes and pollen data observed at this site underscore the complementary nature of pollen and leaf wax d13C data for reconstructing past vegetation changes and the potentially large effects of such changes on leaf wax image signatures. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: US Environmental Protection Agency # Grant: (STAR fellowship to KLF) Agreement FP-91762301-0 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Woods Hole Oceanographic Institution # Grant: internal grant #--------------------------------------- # Site Information # Site_Name: Laguna La Gaiba # Location: South America>Bolivia # Country: Bolivia # Northernmost_Latitude: -17.77 # Southernmost_Latitude: -17.77 # Easternmost_Longitude: -57.72 # Westernmost_Longitude: -57.72 # Elevation: 160 m #--------------------------------------- # Data_Collection # Collection_Name: Gaiba2016iso # First_Year: 41100 # Last_Year: 0 # Time_Unit: cal yr BP # Core_Length: 5.4 m # Notes: #--------------------------------------- # Chronology_Information # Chronology: For chronology and further details on sediment cores, please see: # Whitney, B.S. et al. Palaeogeogr. Palaeoclimatol. Palaeoecol. 307, 177-192 (2011). #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ## sample_code sample code,,,,,,description for surface sediment samples,,C ## depth_cm depth,,,cm,,,core-depth for downcore samples,,N ## age_calBP age,,,cal yr BP,,,,,N ## d13CleafwaxC27 d13C,n-C27 alkane,,per mil VPDB,,sediment,,GC-IRMS,N ## d13CleafwaxC27err d13C 1S error,n-C27 alkane,,per mil VPDB,,sediment,1 sigma precision,GC-IRMS,N ## d13CleafwaxC29 d13C,n-C29 alkane,,per mil VPDB,,sediment,,GC-IRMS,N ## d13CleafwaxC29err d13C 1S error,n-C29 alkane,,per mil VPDB,,sediment,1 sigma precision,GC-IRMS,N ## d13CleafwaxC31 d13C,n-C31 alkane,,per mil VPDB,,sediment,,GC-IRMS,N ## d13CleafwaxC31err d13C 1S error,n-C31 alkane,,per mil VPDB,,sediment,1 sigma precision,GC-IRMS,N ## d13CleafwaxC33 d13C,n-C33 alkane,,per mil VPDB,,sediment,,GC-IRMS,N ## d13CleafwaxC33err d13C 1S error,n-C33 alkane,,per mil VPDB,,sediment,1 sigma precision,GC-IRMS,N ## d2HleafwaxC29 dD,n-C29 alkane,,per mil VSMOW,,sediment,corrected for ice volume effects on mean ocean dD,GC-IRMS,N ## d2HleafwaxC29err dD 1S error,n-C29 alkane,,per mil VSMOW,,sediment,1 sigma precision,GC-IRMS,N ## d2HleafwaxC31 dD,n-C31 alkane,,per mil VSMOW,,sediment,corrected for ice volume effects on mean ocean dD,GC-IRMS,N ## d2HleafwaxC31err dD 1S error,n-C31 alkane,,per mil VSMOW,,sediment,1 sigma precision,GC-IRMS,N ## d2HleafwaxC33 dD,n-C33 alkane,,per mil VSMOW,,sediment,corrected for ice volume effects on mean ocean dD,GC-IRMS,N ## d2HleafwaxC33err dD 1S error,n-C33 alkane,,per mil VSMOW,,sediment,1 sigma precision,GC-IRMS,N # #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: N/A # sample_code depth_cm age_calBP d13CleafwaxC27 d13CleafwaxC27err d13CleafwaxC29 d13CleafwaxC29err d13CleafwaxC31 d13CleafwaxC31err d13CleafwaxC33 d13CleafwaxC33err d2HleafwaxC29 d2HleafwaxC29err d2HleafwaxC31 d2HleafwaxC31err d2HleafwaxC33 d2HleafwaxC33err Surface_rivermargin 0 0 -31.0 0.1 -31.0 0.1 -31.3 0.1 -29.8 0.1 -175 2.4 -180 3.7 -182 6.3 Surface_coresite 0 0 -32.1 0.2 -31.2 0.1 -30.7 0.3 -29.3 0.1 -167 3.2 -170 2.6 -172 1.9 LGS-22 22 1.1 -33.7 1.6 -31.5 0.2 -31.0 0.8 -28.8 0.3 -171 11.7 -176 14.0 -177 8.3 LGS-23 23 1.2 -32.1 0.0 -31.2 0.1 -28.7 0.2 -28.8 0.1 -167 0.6 -173 1.8 -172 2.0 LGS-24 24 1.3 -32.2 0.2 -31.1 0.3 -30.3 0.4 -28.6 0.1 -173 6.1 -177 6.3 -179 4.6 LGS-40 40 2.2 -28.7 0.2 -28.8 0.1 -27.8 0.2 -26.3 0.1 -171 4.6 -180 5.3 -179 5.2 LGS-55 55 3.2 -27.2 0.1 -27.0 0.1 -26.5 0.2 -25.5 0.1 -185 0.5 -193 0.7 N/A N/A LGS-75 75 4.6 -26.6 0.3 -27.4 0.3 -27.3 0.1 -26.3 0.1 -185 1.7 -189 0.4 -190 1.3 LLG1a-95 95 6.4 -21.5 0.0 -22.5 0.2 -23.4 0.1 -23.8 0.5 -188 4.2 -187 4.3 -180 4.0 LLG1a-128 128 7.6 -25.6 0.3 -25.5 0.2 -26.0 0.3 -25.8 0.3 -173 4.5 -176 3.7 -173 1.8 LLG1a-129 129 7.6 -24.7 0.1 -25.3 0.1 -25.4 0.1 -24.8 0.1 -172 5.7 -178 8.1 -177 2.4 LLG1a-158 158 8.9 -24.9 0.2 -24.2 0.1 -24.4 0.2 -25.0 0.1 -184 0.3 -192 0.9 -194 0.5 LLG1a-176 176 10.1 -29.2 N/A -28.2 N/A -27.3 N/A -26.7 0.0 -180 0.9 -185 0.3 -184 1.6 LLG1a-197 197 11.6 N/A N/A N/A N/A N/A N/A N/A N/A -177 N/A -184 N/A -181 N/A LLG1a-198 198 11.6 -28.4 0.1 -27.7 0.1 -26.7 0.1 -26.3 0.1 -179 1.8 -189 1.1 -187 0.8 LLG1a-202 202 11.8 -31.2 0.0 -29.9 0.1 -27.5 0.1 -26.1 0.3 -183 0.6 -193 2.4 -190 2.3 LLG1a-206 206 11.9 -28.9 0.1 -28.4 0.2 -27.0 0.2 -26.8 0.1 -179 0.6 -189 3.1 -185 0.8 LLG1a-211 211 12.0 -30.6 0.1 -29.5 0.1 -28.1 0.8 -27.2 0.1 -181 3.2 -187 0.2 -187 3.5 LLG1a-217 217 12.1 -30.5 0.2 -29.7 0.1 -27.9 0.1 -27.2 0.3 -179 0.4 -187 3.2 -185 0.8 LLG1a-221 221 12.2 -32.5 0.1 -31.3 0.1 -30.0 0.0 -28.7 0.1 -174 2.0 -179 2.4 -182 1.6 LLG1a-225 225 12.3 -33.7 0.4 -32.4 0.2 -31.0 0.1 -29.8 0.1 -170 1.2 -172 2.4 -173 1.7 LLG1a-231 231 12.7 -34.8 0.1 -33.2 0.2 -32.2 0.3 -30.7 0.1 -171 1.9 -167 0.9 -171 0.2 LLG1a-235 235 13.1 -34.8 0.2 -33.3 0.1 -32.4 0.1 -31.0 0.2 -172 1.3 -174 1.0 -174 1.0 LLG1a-241 241 13.9 -34.7 0.1 -33.2 0.1 -32.6 0.1 -31.2 0.1 -172 1.5 -170 2.4 -174 1.6 LLG1a-247 247 15.2 -34.8 0.0 -33.2 0.2 -32.9 0.1 -31.1 0.1 -169 0.1 -170 0.3 -174 0.8 LLG1a-251 251 16.3 -35.3 0.1 -33.6 0.1 -32.9 0.1 -31.3 0.0 -170 2.3 -171 0.6 -173 0.8 LLG1a-254 254 17.3 -34.6 0.1 -33.0 0.1 -32.5 0.1 -30.7 0.1 -166 6.4 -167 5.1 -177 1.2 LLG1a-258 258 18.7 -34.1 0.1 -32.6 0.2 -31.7 0.1 -29.2 0.2 -161 6.8 -165 2.1 -169 1.2 LLG1-260 260 21.0 -26.7 0.2 -27.0 0.2 -25.8 0.1 -23.7 0.3 -179 0.5 -182 0.5 -191 0.8 LLG1-261 261 21.2 N/A N/A N/A N/A N/A N/A N/A N/A -168 N/A N/A N/A -187 N/A LLG1a-270 270 23.3 -27.2 0.1 -27.2 0.3 -25.7 0.2 -23.5 0.2 -167 2.4 -177 1.8 -184 7.1 LLG1a-277 277 26.0 -27.1 0.2 -27.9 0.1 -26.1 0.3 -23.2 0.1 -166 3.3 -174 6.8 -185 4.3 LLG1a-278 278 26.6 -27.1 0.1 -28.8 0.1 -27.3 0.2 -23.1 0.3 -170 0.8 -180 1.9 -188 2.4 LLG1a-282 282 27.8 -27.7 0.2 -28.7 0.2 -26.8 0.1 -23.4 0.1 -165 3.4 -174 2.8 -184 3.1 LLG1a-286 286 29.1 -28.4 N/A -29.5 N/A -28.0 N/A -24.3 N/A -157 2.0 -164 0.0 -174 2.0 LLG1a-293 293 31.1 -28.6 0.1 -29.5 0.0 -27.6 0.1 -24.1 0.0 -161 1.8 -168 0.9 -180 1.4 LLG1a-302 302 33.1 -28.8 0.2 -29.5 0.3 -27.6 0.1 -24.1 0.2 -159 0.2 -164 0.0 -180 1.5 LLG1a-312 312 34.6 -29.3 0.2 -29.8 0.1 -27.8 0.0 -24.1 0.2 -165 3.4 -170 3.3 -182 4.6 LLG1a-326 326 36.1 -29.5 0.3 -30.3 0.1 -28.4 0.1 -24.7 0.1 -166 0.8 -176 1.0 -184 0.6 LLG1a-350 350 37.5 -30.6 0.2 -31.0 0.1 -29.3 0.1 -25.7 0.2 -166 0.0 -169 0.6 -181 0.7 LLG1a-440 440 39.3 -26.5 0.2 -28.0 0.1 -26.1 0.4 -23.4 0.2 -175 6.2 -183 3.7 -194 3.6 LLG1a-540 540 41.1 -28.2 0.0 -29.0 0.3 -27.2 0.1 -23.9 0.2 -165 1.1 -178 0.7 -185 0.3