Amazon Fan ODP942 37KYr Tetraether Lipids Data Bendle, J.A.; Weijers, J.W.H.; Maslin, M.A.; Sinninghe Damsté, J.S.; Schouten, S.; Hopmans, E.C.; Boot, C.S.; Pancost, R.D. Bendle, J.A. Weijers, J.W.H. Maslin, M.A. Sinninghe Damsté, J.S. Schouten, S. Hopmans, E.C. Boot, C.S. Pancost, R.D. Air Temperature Reconstruction Last Glacial Maximum PAGES 2k Network PAGES LOTRED SA2k earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP 942>LATITUDE 5.75>LONGITUDE -49.1) The Amazon basin is a major component of the global carbon and hydrological cycles, a significant natural source of methane, and home to remarkable biodiversity and endemism. Reconstructing past climate changes in the Amazon basin is important for a better understanding of the effect of such changes on these critical functions of the basin. Using a novel biomarker proxy, based on the membrane lipids of soil bacteria with a new regional calibration, we present a reconstruction of changes in mean annual air temperatures for the Amazon catchment during the last 37 kyr B.P. Biomarkers were extracted from Ocean Drilling Program sediment core ODP942 recovered from the Amazon fan. The Amazon fan is a major depository for terrestrial sediments, with the advantage that the terrestrial material captured reflects a regional integration of the whole river catchment. The reconstructed tropical Amazonian temperatures were ~5°C cooler at the Last Glacial Maximum (~21°C) compared to modern values (~26°C). This is in agreement with previous estimates of tropical continental temperatures in the tropical Amazon basin and tropical Africa during the Last Glacial Maximum. Moreover, we also illustrate how the soil bacterial membrane lipid record reveals major changes in basin dynamics and sediment provenance during the glacial-Holocene transition, impacting the biomarker reconstructions from ~11 kyr onward. STUDY NOTES: GDGT biomarker data from an Amazon Fan sediment core for the past 37,000 years. Data includes depths and age model calculations for the sediment samples from ODP site 942; LC-MS data-file IDs; integrations of peak responses for GDGT biomarkers for all m/z; GDGT indices; reconstructed temperatures and pHs; organic matter end-member calculations. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bendle, J.A. Investigator : Weijers, J.W.H. Investigator : Maslin, M.A. Investigator : Sinninghe Damsté, J.S. Investigator : Schouten, S. Investigator : Hopmans, E.C. Investigator : Boot, C.S. Investigator : Pancost, R.D. 2011-04-15 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/10829 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bendle2010/bendle2010.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bendle2010/bendle2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bendle2010/bendle2010.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bendle2010/bendle2010.txt English https://www.ncdc.noaa.gov/paleo/study/10829 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bendle2010/bendle2010.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/bendle2010/bendle2010.txt Bendle, J.A., J.W.H. Weijers, M.A. Maslin, J.S. Sinninghe Damsté, S. Schouten, E.C. Hopmans, C.S. Boot, and R.D. Pancost. 2010. Major changes in glacial and Holocene terrestrial temperatures and sources of organic carbon recorded in the Amazon fan by tetraether lipids. Geochem. Geophys. Geosyst., 11 , Q12007, doi:10.1029/2010GC003308. START YEAR: 36936 cal yr BP * END YEAR: 619 cal yr BP -49.1 5.75 -49.1 5.75