{"NOAAStudyId":"22276","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"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.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2017-06-26","dataPublisher":"NOAA","dataType":"PALEOCEANOGRAPHY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoceanography","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-22276.xml","doi":null,"earliestYearBP":20605,"earliestYearCE":-18655,"entryId":"noaa-ocean-22276","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE 1260690"}],"investigators":"Weldeab, S.; Friedrich, T.; Timmermann, A.; Schneider, R.R.","mostRecentYearBP":9984,"mostRecentYearCE":-8034,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/22276","originalSource":null,"publication":[{"abstract":"We present a benthic foraminiferal multiproxy record of eastern equatorial Atlantic (EEA) middepth water (1295?m) covering the last deglacial. We show that EEA middepth water temperatures were elevated by 3.9?±?0.5°C and 5.2?±?1.2°C during Heinrich event 1 (H1) and Younger Dryas (YD), respectively. The radiocarbon content of the EEA middepth during H1 and YD is relatively low and comparable to the values of the pre-H1 episode and Bølling-Allerød, respectively. A transient Earth system model simulation, which mimics the observed deglacial Atlantic Meridional Overturning Circulation (AMOC) history, qualitatively reproduces the major features of the EEA proxy records. The simulation results suggest that fresh water-induced weakening of the AMOC leads to a vertical shift of the horizon of Southern Ocean-sourced water and a stronger influence of EEA sea surface temperatures via mixing. Our findings reaffirm the lack of a distinctive signature of radiocarbon depletion and therefore do not support the notion of interhemispheric exchanges of strongly radiocarbon-depleted middepth water across the tropical Atlantic during H1 and YD. Our temperature reconstruction presents a critical zonal and water depth extension of existing tropical Atlantic data and documents a large-scale and basin-wide warming across the thermocline and middepth of the tropical Atlantic during H1 and YD. Significant difference in the timing and pace of H1 middepth warming between tropical Atlantic and North Atlantic likely points to a limited role of the tropical Atlantic middepth warming in the rapid heat buildup in the North Atlantic middepth.","author":{"name":"Weldeab, S., T. Friedrich, A. Timmermann, and R.R. Schneider"},"citation":"Weldeab, S., T. Friedrich, A. Timmermann, and R.R. Schneider. 2016. Strong mid-depth warming and weak radiocarbon imprints in the equatorial Atlantic during Heinrich 1 and Younger Dryas. 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