{"NOAAStudyId":"6096","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":"2008-07-01","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-6096.xml","doi":null,"earliestYearBP":243450,"earliestYearCE":-241500,"entryId":"noaa-cave-6096","funding":[],"investigators":"Stoykova, D.A.; Shopov, Y.Y.","mostRecentYearBP":-50,"mostRecentYearCE":2000,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/6096","originalSource":null,"publication":[{"abstract":"We have confirmed the solar origin of insolation cycles of 11,500, 4400, 3950, 2770, 2500, 2090, 1960, 1670, 1460, 1280, 1195, 1145, 1034, 935, 835, 750 and 610 yrs found in speleothem luminescence by their presence in other indices of the solar wind. The 11,500-yr solar cycle can produce climatic variations similar to those caused by the orbital variations.We discovered a sub-annual cycle of 27 days in one very high-resolution speleothem proxy paleoclimatic record, attributed to solar rotation, which causes the periodic appearance of active zones on the visible solar surface, which are the major emitters of solar wind. Solar wind modulates cosmic ray flux at the Earth, while cosmic rays influence the atmospheric transparency, thus producing a multiplication of solar variations in insolation. Small variations of the solar activity can produce a measurable influence on insolation.","author":null,"citation":"Stoykova, D.A.,Shopov, Y.Y. 2008. Origin of the climatic cycles from orbital to sub-annual scales. J. of Atmospheric and Solar-Terrestrial Physics, Vol. 70, pp. 293-302.","edition":null,"identifier":null,"issue":null,"journal":"Journal of Atmospheric and Solar-Terrestrial Physics","pages":null,"pubRank":"1","pubYear":null,"reportNumber":null,"title":"Origin of the climatic cycles from orbital to sub-annual scales","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"20554","geo":{"geoType":"Feature","geometry":{"coordinates":["42.483","23.183"],"type":"POINT"},"properties":{"easternmostLongitude":"23.183","maxElevationMeters":"940","minElevationMeters":"940","northernmostLatitude":"42.483","southernmostLatitude":"42.483","westernmostLongitude":"23.183"}},"locationName":"Continent>Europe>Eastern Europe>Bulgaria","mappable":"Y","paleoData":[{"NOAADataTableId":"9404","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>speleothems>lithology"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/europe/bulgaria/duhlata2008.txt","linkText":"duhlata2008.txt","urlDescription":"Speleothem","variables":[{"cvAdditionalInfo":null,"cvDataType":"SPELEOTHEMS","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"decimal logarithm relative units","cvDataType":"SPELEOTHEMS","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate>calcium carbonate","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"electromagnetic property>luminescence"}]}],"dataTableName":"Duhlata Cave Core 001","dataTableNotes":null,"earliestYear":-241500,"earliestYearBP":243450,"earliestYearCE":-241500,"mostRecentYear":2000,"mostRecentYearBP":-50,"mostRecentYearCE":2000,"species":[],"timeUnit":"AD"}],"siteName":"Duhlata Cave"}],"studyCode":null,"studyName":"Stoykova et al. 2008 Duhlata Cave, Bulgaria 243KYr Speleothem Luminescence Data","studyNotes":null,"version":"1.0","xmlId":"7302"}