noaa-cave-16997 Korean Speleothem 550KYr Growth Frequency 230Th Age Data Jo, K.; Woo, K.S.; Yi, S.; Yang, D.Y.; Lim, H.S.; Wang, Y.; Cheng, H.; Edwards, R.L. Korean Speleothem 550KYr Growth Frequency 230Th Age Data 2014-07-30 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16997 Investigator K. Jo Investigator K.S. Woo Investigator S. Yi Investigator D.Y. Yang Investigator H.S. Lim Investigator Y. Wang Investigator H. Cheng Investigator R.L. Edwards earth science paleoclimate speleothems sample identification,null,null,null,null,speleothems,null,null,C,null earth science paleoclimate speleothems age,null,95% confidence interval margin of error,calendar kiloyear,null,speleothems,null,null,N,null earth science paleoclimate speleothems age,null,null,calendar kiloyear before present,null,speleothems,null,null,N,null earth science paleoclimate speleothems age control geoscientificInformation 540020 cal yr BP 730 cal yr BP Complete 37.1 37.1 128.5014 128.5014 265 265 Continent Asia Eastern Asia South Korea Eden Cave>LATITUDE 37.1>LONGITUDE 128.5014 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 Kyoung-nam Jo, Kyung Sik Woo, Sangheon Yi, Dong Yoon Yang, Hyoun Soo Lim, Yongjin Wang, Hai Cheng and R. Lawrence Edwards 2014 Nature 508 7496 378-382 10.1038/nature13076 http://www.nature.com/nature/journal/v508/n7496/full/nature13076.html

An interhemispheric hydrologic seesaw - in which latitudinal migrations of the Intertropical Convergence Zone (ITCZ) produce simultaneous wetting (increased precipitation) in one hemisphere and drying in the other - has been discovered in some tropical and subtropical regions. For instance, Chinese and Brazilian subtropical speleothem (cave formations such as stalactites and stalagmites) records show opposite trends in time series of oxygen isotopes (a proxy for precipitation variability) at millennial to orbital timescales, suggesting that hydrologic cycles were antiphased in the northerly versus southerly subtropics. This tropical to subtropical hydrologic phenomenon is likely to be an initial and important climatic response to orbital forcing. The impacts of such an interhemispheric hydrologic seesaw on higher-latitude regions and the global climate system, however, are unknown. Here we show that the antiphasing seen in the tropical records is also present in both hemispheres of the mid-latitude western Pacific Ocean. Our results are based on a new 550,000-year record of the growth frequency of speleothems from the Korean peninsula, which we compare to Southern Hemisphere equivalents. The Korean data are discontinuous and derived from 24 separate speleothems, but still allow the identification of periods of peak speleothem growth and, thus, precipitation. The clear hemispheric antiphasing indicates that the sphere of influence of the interhemispheric hydrologic seesaw over the past 550,000 years extended at least to the mid-latitudes, such as northeast Asia, and that orbital-timescale ITCZ shifts can have serious effects on temperate climate systems. Furthermore, our result implies that insolation-driven ITCZ dynamics may provoke water vapour and vegetation feedbacks in northern mid-latitude regions and could have regulated global climate conditions throughout the late Quaternary ice age cycles. STUDY NOTES: Korean Speleothem growth frequency record based on 230Th ages from 24 speleothems collected on the Korean peninsula.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/korea/jo2014korea230th.txt Text Data File; Korean Speleothem 230Th Age Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/korea/jo2014korea230th.xlsx Excel Data File; Korean Speleothem 230Th Age Data - Supplemental File F2 USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11