El Junco Lake, Galapagos Diatom T/E Index Data Steinitz-Kannan, M.; Cole, J.E.; Bush, M.B.; Overpeck, J.T.; Colinvaux, P.A.; Restrepo, A.; Conroy, J.L. Steinitz-Kannan, M. Cole, J.E. Bush, M.B. Overpeck, J.T. Colinvaux, P.A. Restrepo, A. Conroy, J.L. PAGES 2k Network PAGES LOTRED SA2k earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (age,null,null,year Common Era,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (diatom ratio,sediment,null,dimensionless,null,paleolimnology,null,null,N,tychoplanktic:epiphytic diatoms) earth science/paleoclimate/paleolimnology (El Junco>LATITUDE -.87>LONGITUDE -89.45) Through its intimate connection with the El Nino/Southern Oscillation system, climate variability in the tropical Pacific Ocean influences climate across much of the planet. But the history of temperature change in the tropical Pacific Ocean during recent millennia is poorly known: the available annually resolved records are discontinuous and rarely span more than a few centuries. Longer records at coarser temporal resolution suggest that significant oceanographic changes, observed at multi-year to multi-century resolution, have had important effects on global climate. Here we use a diatom record from El Junco Lake, Galapagos, to produce a calibrated, continuous record of sea surface temperature in the eastern tropical Pacific Ocean at subdecadal resolution, spanning the past 1,200 years. Our reconstruction reveals that the most recent 50 years are the warmest 50-year period within the record. Because our diatom-based sea surface temperature index resembles Northern Hemisphere temperature reconstructions, we suggest that with continued anthropogenic warming, the eastern tropical Pacific Ocean may continue to warm. STUDY NOTES: El Junco Lake, Galapagos tychoplanktonic to epiphytic (T:E) diatom index, with the corresponding sampling depths and ages in Year AD (calibrated radiocarbon, 210Pb and 137Cs age model). Age model data is published in Conroy et al. (2008). ADDITIONAL REFERENCE: Conroy, J.L., J.T. Overpeck, J.E. Cole, T.M. Shanahan, and M. Steinitz-Kannan. 2008. Holocene changes in eastern tropical Pacific climate inferred from a Galapagos lake sediment record. Quaternary Science Reviews, 27(11-12): 1166-1180. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Steinitz-Kannan, M. Investigator : Cole, J.E. Investigator : Bush, M.B. Investigator : Overpeck, J.T. Investigator : Colinvaux, P.A. Investigator : Restrepo, A. Investigator : Conroy, J.L. 2009-03-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/8644 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/ecuador/galapagos/eljunco2009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/ecuador/galapagos/eljunco2009.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/ecuador/galapagos/eljunco2009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/ecuador/galapagos/eljunco2009.xls English https://www.ncdc.noaa.gov/paleo/study/8644 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/ecuador/galapagos/eljunco2009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/ecuador/galapagos/eljunco2009.xls Conroy, J.L, A. Restrepo, J.T. Overpeck, M. Steinitz-Kannan, J.E. Cole, M.B. Bush, and P.A. Colinvaux.2009Unprecedented recent warming of surface temperatures in the eastern tropical Pacific OceanNature Geoscience2146-5010.1038/NGEO390 START YEAR: 1219 cal yr BP * END YEAR: -54 cal yr BP -89.45 -.87 -89.45 -.87