{"NOAAStudyId":"25710","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":"2019-02-20","dataPublisher":"NOAA","dataType":"SPELEOTHEMS","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/speleothem","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-cave-25710.xml","doi":null,"earliestYearBP":22225,"earliestYearCE":-20275,"entryId":"noaa-cave-25710","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"AGS-1702891/1702691, BCS-1750598, EAR-1439559"}],"investigators":"Scroxton, N.; Burns, S.J.; McGee, D.; Hardt, B.F.; Godfrey, L.R.; Ranivoharimanana, L.; Faina, P.","mostRecentYearBP":11912,"mostRecentYearCE":-9962,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/25710","originalSource":null,"publication":[{"abstract":"The global paleomonsoon concept predicts an antiphase response of monsoon rainfall in the northern and southern hemispheres at timescales where there is asymmetric solar forcing and/or asymmetric hemispheric temperature changes. However, as different monsoon systems have different sensitivities to local, regional and global forcing, rainfall response may vary regionally, particularly during large global climatic changes such as the last deglaciation where warming occurred in both hemispheres. Despite its role as a key southern hemisphere counterpart to the Arabian and Indian summer monsoons, the behavior of the summer monsoon in the southern hemisphere of the Indian Ocean during the last deglaciation is unknown. Therefore, we present a new high-resolution, precisely dated, and replicated speleothem stable isotope record from Tsimanampesotse National Park in southwest Madagascar that covers the last deglaciation. We show that speleothem growth phases respond largely to movements of the southern hemisphere summer Hadley circulation (summer extent of the tropical rainbelt/mean Intertropical Convergence Zone location), with some contribution from sea-surface temperature changes at key times, such as during the Bolling-Allerod. In contrast, speleothem d18O responds primarily to sea-surface temperature, in particular the location of the deep atmospheric convection isotherm, while summer Hadley circulation changes take a secondary role. Separating the varying influences of temperature and atmospheric circulation in controlling southwest Madagascan rainfall is critical to understanding rainfall variability in both the past and the future.","author":{"name":"Nick Scroxton, Stephen J. Burns, David McGee, Ben Hardt, Laurie R. Godfrey, Lovasoa Ranivoharimanana, Peterson Faina"},"citation":"Nick Scroxton, Stephen J. Burns, David McGee, Ben Hardt, Laurie R. Godfrey, Lovasoa Ranivoharimanana, Peterson Faina. 2019. Competing temperature and atmospheric circulation effects on southwest Madagascan rainfall during the last deglaciation. Paleoceanography and Paleoclimatology. . doi: 10.1029/2018PA003466","edition":null,"identifier":{"id":"10.1029/2018PA003466","type":"doi","url":"http://dx.doi.org/10.1029/2018PA003466"},"issue":null,"journal":"Paleoceanography and Paleoclimatology","pages":null,"pubRank":"1","pubYear":2019,"reportNumber":null,"title":"Competing temperature and atmospheric circulation effects on southwest Madagascan rainfall during the last deglaciation","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57761","geo":{"geoType":"Feature","geometry":{"coordinates":["-24.048","43.753"],"type":"POINT"},"properties":{"easternmostLongitude":"43.753","maxElevationMeters":"20","minElevationMeters":"20","northernmostLatitude":"-24.048","southernmostLatitude":"-24.048","westernmostLongitude":"43.753"}},"locationName":"Ocean>Indian Ocean>Madagascar","mappable":"Y","paleoData":[{"NOAADataTableId":"37613","coreLengthMeters":1,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>speleothems>carbon isotopes","earth science>paleoclimate>speleothems>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/tsimanampesotse2019mt1.txt","linkText":"Tsimanampesotse Speleothem MT1 Stable Isotope Data","urlDescription":"NOAA Template File","variables":[]}],"dataTableName":"TsimanampesotseMT1","dataTableNotes":null,"earliestYear":22225,"earliestYearBP":22225,"earliestYearCE":-20275,"mostRecentYear":11912,"mostRecentYearBP":11912,"mostRecentYearCE":-9962,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"37614","coreLengthMeters":0,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>speleothems>oxygen isotopes","earth science>paleoclimate>speleothems>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/tsimanampesotse2019ad4.txt","linkText":"Tsimanampesotse Speleothem AD4 Stable Isotope Data","urlDescription":"NOAA Template File","variables":[]}],"dataTableName":"TsimanampesotseAD4","dataTableNotes":null,"earliestYear":19136,"earliestYearBP":19136,"earliestYearCE":-17186,"mostRecentYear":15421,"mostRecentYearBP":15421,"mostRecentYearCE":-13471,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Tsimanampesotse National Park"}],"studyCode":null,"studyName":"Madagascar Deglacial Speleothem Stable Isotope Data","studyNotes":"Speleothem stable isotope (d13C, d18O) data from 2 stalagmites collected in Tsimanampesotse National Park, southwest Madagascar, for the deglacial interval (~22-11 kyrbp).","version":"1.0","xmlId":"63754"}