noaa-lake-22581 Sihailongwa Lake, Northeastern China alkenone-based temperature reconstruction Chu, G.Q.; Sun, Q.; Wang, X.; Liu, M.; Lin, Y.; Xie, M.; Shang, W.; Liu, J. Sihailongwa Lake, Northeastern China alkenone-based temperature reconstruction 2017-05-19 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22581 Investigator G.Q. Chu Investigator Q. Sun Investigator X. Wang Investigator M. Liu Investigator Y. Lin Investigator M. Xie Investigator W. Shang Investigator J. Liu earth science paleoclimate climate reconstructions|paleolimnology sample identification,null,null,null,null,climate reconstructions|paleolimnology,null,null,C,null earth science paleoclimate climate reconstructions|paleolimnology age at sample start,null,null,year Common Era,null,climate reconstructions|paleolimnology,null,null,N,null earth science paleoclimate climate reconstructions|paleolimnology lake surface temperature,alkenone unsaturation index,null,degree Celsius,growing season,climate reconstructions|paleolimnology,null,null,N,null earth science paleoclimate climate reconstructions|paleolimnology age,null,null,year Common Era,null,climate reconstructions|paleolimnology,null,null,N,null earth science paleoclimate climate reconstructions|paleolimnology age at sample end,null,null,year Common Era,null,climate reconstructions|paleolimnology,null,null,N,null earth science paleoclimate climate reconstructions|paleolimnology sample identification,null,null,null,null,climate reconstructions|paleolimnology,null,null,C,sample name earth science paleoclimate climate reconstructions|paleolimnology lake surface temperature,alkenone unsaturation index,null,degree Celsius,growing season,climate reconstructions|paleolimnology,null,null,N,alkenone-based temperature reconstruction for growing season earth science paleoclimate climate reconstructions|paleolimnology sample identification,null,null,null,null,climate reconstructions|paleolimnology,null,null,C,core name earth science paleoclimate paleolimnology reconstruction geoscientificInformation Other Hydroclimate Reconstruction 391 AD 2002 AD 1559 cal yr BP -52 cal yr BP Complete 42.17 42.17 126.36 126.36 1000 1000 Continent Asia Eastern Asia China Sihailongwa Lake>LATITUDE 42.17>LONGITUDE 126.36 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 Chu, Guoqiang, Qing Sun, Xiaohua Wang, Meimei Liu, Yuan Lin, Manman Xie, Wenyu Shang, and Jiaqi Liu 2011 The Holocene 22 785-792 10.1177/0959683611430413

Seasonal temperature variability over longer timescales could offer new insights into understanding different forcing factors and response processes in the climate system. Here we report an alkenone-based temperature reconstruction for growing season over the past 1600 years from the varved sediment in Lake Sihailongwan, northeastern China. The most notable cold spells occurred during the periods ad 480–860, ad 1260–1300, ad 1510–1570 and ad 1800–1900 with a temperature decrease of about 1°C compared with the 20th century. Based on the historical evidence such as ‘snow or frost in the summertime’ and ‘no ice during the wintertime’, we compile extreme cold summer events and warm winter events over the past 1600 years. The ‘Little Ice Age’ time period experienced more extreme cold summer/warm winter events, while the ‘Medieval Warm Period’ had milder winters. Comparatively, the natural proxy data show a general similar pattern with historical documents at decadal time scales, except for between ad 1620 and 1720. Our results show multidecadal to centennial variations in seasonal temperature, possibly caused by interactions of external natural forcing and atmosphere–ocean circulations. STUDY NOTES: Elevation estimated from GoogleEarth, rounded to 100 m.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/china/chu2011/chu2011-sihailongwa.txt NOAA Template File; Sihailongwa Lake Alkenone Temperature Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Asi-SihailongwaLake.Chu.2011.txt NOAA Template File; PAGES 2k v2 Original Contribution GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Asi-SihailongwaLake.Chu.2011.lpd Linked Paleo Data (LiPD) File; PAGES 2k v2 Original Contribution USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11