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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."},"dataType":"PALEOCEANOGRAPHY","investigators":"Meegan Kumar, D.","investigatorDetails":[{"firstName":"Dervla","lastName":"Meegan Kumar","initials":"D.","orcId":"0000-0001-5335-5997"}],"version":"1.0","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"OCE-1651034, AGS-160230"},{"fundingAgency":"Heising-Simons Foundation","fundingGrant":"2016-015"}],"studyNotes":"Alkenone unsaturation index (UK'37) and principal components for sediments collected at site NH8P, Eastern Pacific, for the past 24,000 years.","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/33655","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-33655.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-ocean-33655.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/paleoceanography","studyCode":null,"scienceKeywords":null,"reconstruction":"N","contributionDate":"2021-06-29","entryId":"noaa-ocean-33655","earliestYearBP":24336,"mostRecentYearBP":1381,"earliestYearCE":-22386,"mostRecentYearCE":569,"publication":[{"author":{"name":"Meegan Kumar, D., J.E. Tierney, T. Bhattacharya, J. Zhu, L. McCarty, J.W. Murray"},"pubYear":2021,"title":"Climatic Drivers of Deglacial SST Variability in the Eastern Pacific","journal":"Paleoceanography and Paleoclimatology","volume":"36","edition":null,"issue":"10","pages":null,"reportNumber":"e2021PA004264","citation":"Meegan Kumar, D., J.E. Tierney, T. Bhattacharya, J. Zhu, L. McCarty, J.W. Murray. 2021. Climatic Drivers of Deglacial SST Variability in the Eastern Pacific. Paleoceanography and Paleoclimatology, 36(10), e2021PA004264. doi: 10.1029/2021PA004264","type":"publication","identifier":{"type":"doi","id":"10.1029/2021PA004264","url":"http://dx.doi.org/10.1029/2021PA004264"},"abstract":"We explore the response of northeastern Pacific sea surface temperature (SST) to deglacial (~167 ka) climate variability as recorded in Uk'37-based SST reconstructions spanning 65°N to 10°S. Included in the analysis is a new 23 kyr SST record from core NH8P from the northwest Mexican Margin. We isolate spatiotemporal patterns in regional SSTs with trend empirical orthogonal function (TEOF) analysis. The dominant TEOF mode reflects deglacial warming associated with rising pCO2. Tropical and subtropical SSTs correlated most strongly with this mode, suggesting that the thermodynamic response of the tropical eastern Pacific to greenhouse gas forcing was the dominant driver of regional SST change during deglaciation. The second TEOF mode reflects millennial-scale variability and is most strongly expressed in subpolar SSTs. The synchronous timing between North Pacific and North Atlantic SST oscillations is evidence for the rapid transmission of millennial-scale climate perturbations between the basins, likely through an atmospheric teleconnection. SSTs at NH8P have no correlation with either leading TEOF mode as there is minimal change in SST at this site after ~20 ka. A model simulation of the LGM indicates that glacial cooling was muted in much of the Eastern Pacific Warm Pool (EPWP), in which NH8P lies, due to reductions in latent heat flux. This suggests that the wind-evaporation-SST feedback was responsible for the attenuation of EPWP cooling. Overall, this study highlights the distinct latitudinal trends in the Pacific's response to deglaciation.","pubRank":"1"}],"site":[{"NOAASiteId":"19118","siteName":"NH8P","siteCode":null,"mappable":"Y","locationName":"Ocean>Pacific Ocean>North Pacific Ocean","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["22.38","-107.07"]},"properties":{"southernmostLatitude":"22.38","northernmostLatitude":"22.38","westernmostLongitude":"-107.07","easternmostLongitude":"-107.07","minElevationMeters":"-1018","maxElevationMeters":"-1018"}},"paleoData":[{"dataTableName":"Kumar2021TEOF","NOAADataTableId":"46418","earliestYear":15700,"mostRecentYear":6925,"timeUnit":"cal yr BP","earliestYearBP":15700,"mostRecentYearBP":6925,"earliestYearCE":-13750,"mostRecentYearCE":-4975,"coreLengthMeters":null,"dataTableNotes":null,"species":[],"dataFile":[{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/kumar2021/kumar2021teof.txt","urlDescription":"NOAA Template File","linkText":"Site NH8P Alkenone Unsaturation Index Principal Components","variables":[{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"age variable>age","cvMaterial":null,"cvError":null,"cvUnit":"time unit>age unit>calendar year before present","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Median age","cvFormat":"Numeric","cvShortName":"age"},{"cvDataType":"PALEOCEANOGRAPHY","cvWhat":"statistical variable>multivariate eigenvector-based variable>principal component","cvMaterial":"reconstruction material>organic compound index>alkenone unsaturation index","cvError":null,"cvUnit":"dimensionless","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"PC1; 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