摘要
Long-time series of high-resolution temperature record from Chinese Loess Plateau is rare. An April-September mean temperature reconstruction (1826-2004) has been developed for the north-central Shaanxi Province, China, based on tree-ring width analysis. The reconstruction captures 39.3% (p<0.001) of the variance in the instrumental data over the calibration period from 1951 to 2002. The reconstruction shows a high temperature period of 1928-1933, which coincides with the timing of the extreme drought event in 1920s in the entire northern China. The two low temperature periods in reconstruction are 1883-1888 and 1938-1942. With the global warming, the April-September mean temperature in study area has also increased since the 1970s, but has not exceeded the temperature in 1928-1933. Besides the statistical analysis, the reconstruction is also verified by the local dryness/wetness index and other dendroclimatological results.
Long-time series of high-resolution temperature record from Chinese Loess Plateau is rare. An April–September mean temperature reconstruction (1826–2004) has been developed for the north-central Shaanxi Province, China, based on tree-ring width analysis. The reconstruction captures 39.3% (p<0.001) of the variance in the instrumental data over the calibration period from 1951 to 2002. The reconstruction shows a high temperature period of 1928–1933, which coincides with the timing of the extreme drought event in 1920s in the entire northern China. The two low temperature periods in reconstruction are 1883–1888 and 1938–1942. With the global warming, the April–September mean temperature in study area has also increased since the 1970s, but has not exceeded the temperature in 1928–1933. Besides the statistical analysis, the reconstruction is also verified by the local dryness/wetness index and other dendroclimatological results.
基金
the National Natural Science Foundation of China (Grant Nos. 40525004, 40701196 and 40599423)
the Ministry of Science and Technology of China (Grant No. 2004CB720200)
the foundation of the State Key Laboratory of Loess and Quaternary Geology (Grant Nos. SKLLQG0214, SKLLQG0516)
