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Winter half-year temperature reconstruction for the middle and lower reaches of the Yellow River and Yangtze River, China, during the past 2000 years.

East-central China winter temperature reconstruction
Fig. 3b. Winter half-year temperature anomaly change in eastern China with 10-year resolution. Black dot line is winter half-year temperature anomaly; grey line is three-point running mean; dashed line is error bar. Click figure for complete figure 3 (2000 year record at 30-year resolution.)
Winter half-year temperature reconstruction for the middle and lower reaches of the Yellow River and Yangtze River, China, during the past 2000 years.
Volume 13, Issue 6, pp. 933-940, 2003

Quansheng Ge, Jingyun Zheng, Xiuqi Fang*, Xueqin Zhang, and Piyuan Zhang
Institute of Geographic Sciences and Natural Resources Research (IGSNRR), Chinese Academy of Sciences (CAS), Beijing 100101, China
Zhimin Man
Institute of Chinese History and Geography, Fudan University, Shanghai 200433, China
Wei-Chyung Wang
Atmospheric Sciences Research Center, State University of New York, Albany, NY12202, USA
* Also at Department of Resources and Environment Sciences, Beijing Normal University, Beijing 100875, China.

Phenological cold/warm events recorded in Chinese historical documents are used to reconstruct, at 10-30 years' resolution, winter half-year (October to April) temperatures for the past 2000 years in the central region of eastern China. Because of the uneven spatial and temporal distribution of the phenological records, the reconstruction of the regional mean temperature involves two steps: reconstruction for individual sites within the region and calculation of the regional mean. For a single site, the reconstruction involves: identifying the difference in dates in phenological events for both historical and modern records; establishing the conversion function between the date difference and temperature change from the modern records; and converting the historical records into temperature variation. The spatial representativeness of the individual sites is studied by examining the correlation between individual sites and regional mean temperature from modern instrumental data. The correlation is then used as the basis for constructing the regional mean winter half-year temperature for the past 2000 years. From the beginning of the Christian era, climate became cooler at a rate of 0.17C per century, and around the AD 490s temperature reached about 1C lower than that of the present (the 1951- 80 mean). Then, abruptly, temperature entered a warm epoch from the AD 570s to 1310s with a warming trend of 0.04C per century; the peak warming was about 0.3-0.6C higher than present for 30-year periods, but over 0.9C warmer on a 10-year basis. After the AD 1310s, temperature decreased rapidly at a rate of 0.10C per century; the mean temperatures of the four cold troughs were 0.6-0.9C lower than the present, with the coldest value 1.1C lower. Temperature has been rising rapidly during the twentieth century, especially for the period 1981-99, and the mean temperature is now 0.5C higher than for 1951-80. The most interesting aspect over the past 2000 years has been the rapid transitions between cold and warm periods.

Download the reconstructed East-central China winter half-year temperature reconstruction from the WDC Paleo Archive.
To read or view the full study, please visit the Ingenta website.
It was published in Holocene, Volume 13, Issue 6, pp. 933-940, 2003.

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National Oceanic and Atmospheric Administration
8 December 2003