noaa-lake-13195 Lago El Gancho, Nicaragua 1600 Year Geochemical Data Stansell, N.D. Lago El Gancho, Nicaragua 1600 Year Geochemical Data 2012-08-05 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/13195 Investigator N.D. Stansell earth science paleoclimate paleolimnology calcium carbonate,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,1000 degrees C earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,size fraction > 150 microns; Physocypria sp. earth science paleoclimate paleolimnology density,sediment,null,gram per cubic centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology mineral matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,1000 degrees C earth science paleoclimate paleolimnology age,null,null,year Common Era,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology volume magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,magnetic susceptibility measurement with point or surface sensor,N,x10-6 units earth science paleoclimate paleolimnology organic matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,550 degrees C earth science paleoclimate paleolimnology oxygen isotopes earth science paleoclimate paleolimnology magnetic susceptibility earth science paleoclimate paleolimnology physical properties earth science paleoclimate paleolimnology geochemistry geoscientificInformation Little Ice Age (LIA) Medieval Climate Anomaly (MCA) -663 AD 1995 AD 2613 cal yr BP -45 cal yr BP Complete 11.9 11.9 -85.9167 -85.9167 44 44 Continent North America Central America Nicaragua Lago El Gancho>LATITUDE 11.9>LONGITUDE -85.9167 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 Nathan D. Stansell, Byron A. Steinman, Mark B. Abbott, Michael Rubinov, Manuel Roman-Lacayo 2013 Geology 41 2 151-154 10.1130/G33736.1 https://pubs.geoscienceworld.org/gsa/geology/article-abstract/41/2/151/131130/lacustrine-stable-isotope-record-of-precipitation

Discerning the influences of the El Nino Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO) on drought variability in the tropics during the Medieval Climate Anomaly (MCA) and Little Ice Age (LIA) will help to improve our understanding of climate system responses to internal and external forcing. Sediments from Lago El Gancho, Nicaragua, provide an ~1400 yr record of water balance (precipitation and evaporation) changes from a region that is sensitive to teleconnected Pacific and Atlantic ocean-atmosphere dynamics. Oxygen isotope values of ostracod carapaces (d18Oostracod) are consistently low in El Gancho sediments between ca. A.D. 950 and 1250, indicating that wetter conditions prevailed during the MCA, a period of La Nina-like mean state conditions in the tropical Pacific, and a positive mean state of the NAO. The ~150 yr period between the MCA and LIA was marked by an abrupt shift to persistently drier conditions at a time of highly variable Pacific sea-surface temperatures, and a transition toward a more negative NAO phase. In sediment from ca. A.D. 1450 to the present, d18Oostracod values increase, suggesting that drier conditions persisted through most of the LIA, a time of a relatively negative NAO phase and El Nino-like mean state conditions in the tropical Pacific. The long-term precipitation trends inferred from the El Gancho data are not entirely consistent with modern associations between precipitation in the circum-Caribbean region and the NAO, suggesting that present-day hydroclimatic shifts resulting from variability in synoptic climate patterns are dissimilar to changes resulting from teleconnected ocean-atmosphere dynamics that operated during the MCA and LIA. STUDY NOTES: Paleolimnological data from Lago El Gancho, Nicaragua, for the past 1600 years. Data include sediment density, percent organic matter and percent calcium carbonate, magnetic susceptibility, bulk density, and oxygen isotope (d18O) data. Lago El Gancho, Nicaragua: 11°54'N, 85°55'W, 44m elev, 1m depth

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/nicaragua/gancho2012.xls GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/nicaragua/gancho2012.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11