noaa-lake-8644 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. El Junco Lake, Galapagos Diatom T/E Index Data 2009-03-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/8644 Investigator M. Steinitz-Kannan Investigator J.E. Cole Investigator M.B. Bush Investigator J.T. Overpeck Investigator P.A. Colinvaux Investigator A. Restrepo Investigator J.L. Conroy 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 population abundance geoscientificInformation PAGES 2k Network PAGES LOTRED SA2k 1219 cal yr BP -54 cal yr BP Complete -.87 -.87 -89.45 -89.45 Continent South America Ecuador El Junco>LATITUDE -.87>LONGITUDE -89.45 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Conroy, J.L, A. Restrepo, J.T. Overpeck, M. Steinitz-Kannan, J.E. Cole, M.B. Bush, and P.A. Colinvaux. 2009 Nature Geoscience 2 1 46-50 10.1038/NGEO390

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.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/ecuador/galapagos/eljunco2009.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/ecuador/galapagos/eljunco2009.xls USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11