noaa-recon-19523 Asia 1200 Year Gridded Summer Temperature Reconstructions Cook, E.R.; Krusic, P.J.; Anchukaitis, K.J.; Buckley, B.M.; Nakatsuka, T.; Sano, M. Asia 1200 Year Gridded Summer Temperature Reconstructions 2015-11-24 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19523 Investigator E.R. Cook Investigator P.J. Krusic Investigator K.J. Anchukaitis Investigator B.M. Buckley Investigator T. Nakatsuka Investigator M. Sano earth science paleoclimate instrumental longitude,null,null,degree east,null,instrumental,null,null,N,null earth science paleoclimate climate reconstructions|tree ring age,null,null,year Common Era,null,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|tree ring surface air temperature,null,calibration coefficient of determination,dimensionless,Jun-Aug,climate reconstructions|tree ring,anomalized,regression analysis,N,point-by-point regression earth science paleoclimate instrumental age,null,null,year Common Era,null,instrumental,null,null,N,null earth science paleoclimate climate reconstructions|tree ring surface air temperature,null,null,degree Celsius,Jun-Aug,climate reconstructions|tree ring,anomalized,regression analysis,N,point-by-point regression earth science paleoclimate climate reconstructions|tree ring surface air temperature,null,verification coefficient of efficiency,dimensionless,Jun-Aug,climate reconstructions|tree ring,anomalized,regression analysis,N,point-by-point regression earth science paleoclimate climate reconstructions|tree ring surface air temperature,null,calibration leave-one-out cross-validation reduction of error,dimensionless,Jun-Aug,climate reconstructions|tree ring,anomalized,regression analysis,N,point-by-point regression earth science paleoclimate instrumental sea surface temperature,null,null,degree Celsius,Jun-Aug,instrumental,anomalized,null,N,null earth science paleoclimate instrumental latitude,null,null,degree north,null,instrumental,null,null,N,null earth science paleoclimate climate reconstructions|tree ring latitude,null,null,degree north,null,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|tree ring longitude,null,null,degree east,null,climate reconstructions|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|tree ring surface air temperature,null,verification coefficient of determination,dimensionless,Jun-Aug,climate reconstructions|tree ring,anomalized,regression analysis,N,point-by-point regression earth science paleoclimate climate reconstructions|tree ring surface air temperature,null,verification reduction of error,dimensionless,Jun-Aug,climate reconstructions|tree ring,anomalized,regression analysis,N,point-by-point regression earth science paleoclimate climate reconstructions|tree ring surface air temperature,null,one root mean square error,degree Celsius,Jun-Aug,climate reconstructions|tree ring,anomalized,regression analysis,N,point-by-point regression earth science paleoclimate reconstructions air temperature geoscientificInformation Air Temperature Reconstruction PAGES 2k Network PAGES Asia 2k 800 AD 1989 AD 1150 cal yr BP -39 cal yr BP Complete -10 54 60 148 Continent Asia Eastern Asia Eastern Temperate Asia>LATITUDE >LONGITUDE 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 Edward R. Cook, Paul J. Krusic, Kevin J. Anchukaitis, Brendan M. Buckley, Takeshi Nakatsuka, Masaki Sano, PAGES Asia2k Members 2013 Climate Dynamics 41 11-12 2957-2972 10.1007/s00382-012-1611-x http://link.springer.com/article/10.1007/s00382-012-1611-x

We develop a summer temperature reconstruction for temperate East Asia based on a network of annual tree-ring chronologies covering the period 800-1989 C.E. The East Asia reconstruction is the regional average of 585 individual grid point summer temperature reconstructions produced using an ensemble version of point-by-point regression. Statistical calibration and validation tests indicate that the regional average possesses sufficient overall skill to allow it to be used to study the causes of temperature variability and change over the region. The reconstruction suggests a moderately warm early medieval epoch (ca. 850-1050 C.E.), followed by generally cooler 'Little Ice Age' conditions (ca. 1350-1880 C.E.) and 20th century warming up to the present time. Since 1990, average temperature has exceeded past warm epochs of comparable duration, but it is not statistically unprecedented. Superposed epoch analysis reveals a volcanic forcing signal in the East Asia summer temperature reconstruction, resulting in pulses of cooler summer conditions that may persist for several years. Substantial uncertainties remain, however, particularly at lower frequencies, thus requiring caution and scientific prudence in the interpretation of this record. STUDY NOTES: Tree-ring based 1200-year gridded (2x2 degree) reconstructions of summer (June through August, JJA) temperature for temperate East Asia, produced for the IGBP-PAGES Asia2k project. PAGES Asia 2k Members are Moinuddin Ahmed, Hemant Borgaonkar, Xu Chenxi, Guoqiang Chu, Zexin Fan, Narayan Gaire, Quansheng Ge, Katsuhiko Kimura, Jonathan Palmer, Tatyana Papina, Margit Schwikowski, Xuemei Shao, Feng Shi, Olga Solomina, Zafer Usama, Chenzi Xu, Koh Yasue, Masumi Zaiki, Kan Zhao, and Jingyun Zheng.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-cru-xy.txt Data File; Asia2k CRU Instrumental Data XY Pairs GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-inst-anom.txt Data File; Asia2k Gridded Instrumental Temperature Calibration Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-readme.txt Data Description; Asia2k Gridded Temperature Reconstruction Readme File GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-jja-temp-anom.txt Data File; Asia2k Gridded Temperature Reconstruction GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-stats.txt Data File; Asia2k Gridded Temperature Reconstruction Calibration-Verification Statistics USA/NOAA DIF Version 9.8.4 2019-07-01 2019-07-01