Asia 1200 Year Gridded Summer Temperature Reconstructions Cook, E.R.; Krusic, P.J.; Anchukaitis, K.J.; Buckley, B.M.; Nakatsuka, T.; Sano, M. Cook, E.R. Krusic, P.J. Anchukaitis, K.J. Buckley, B.M. Nakatsuka, T. Sano, M. Air Temperature Reconstruction PAGES 2k Network PAGES Asia 2k 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 (Eastern Temperate Asia>LATITUDE >LONGITUDE ) 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. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Cook, E.R. Investigator : Krusic, P.J. Investigator : Anchukaitis, K.J. Investigator : Buckley, B.M. Investigator : Nakatsuka, T. Investigator : Sano, M. 2015-11-24 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/19523 https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-cru-xy.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-inst-anom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-readme.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-jja-temp-anom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-stats.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-cru-xy.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-inst-anom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-readme.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-jja-temp-anom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-stats.txt English https://www.ncdc.noaa.gov/paleo/study/19523 https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-cru-xy.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-inst-anom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-readme.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-jja-temp-anom.txt https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/asia2k-stats.txt Edward R. Cook, Paul J. Krusic, Kevin J. Anchukaitis, Brendan M. Buckley, Takeshi Nakatsuka, Masaki Sano, PAGES Asia2k Members2013Tree-ring reconstructed summer temperature anomalies for temperate East Asia since 800 C.E.Climate Dynamics4111-122957-297210.1007/s00382-012-1611-xhttp://link.springer.com/article/10.1007/s00382-012-1611-x START YEAR: 800 AD * END YEAR: 1989 AD 60 -10 148 54