Tree-ring-based reconstruction of the April to September mean temperature since 1826 AD for north-central Shaanxi Province, China
Tree-ring-based reconstruction of the April to September mean temperature since 1826 AD for north-central Shaanxi Province, China
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DOI：
10.1007/s11430-008-0084-6
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发表时间：
2008-08-01
期刊：
影响因子：
--
通讯作者：
Sun JunYan
中科院分区：
文献类型：
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作者：
Cai QiuFang;Liu Yu;Sun JunYan
中国黄土高原高分辨率温度记录的长时间序列是罕见的。在年轮宽度分析的基础上，对陕西省中北部地区中国进行了4-9月平均气温重建。重建捕获了从1951年到2002年校准期间仪器数据的39.3%的方差(p<；0.001)。重建显示了1928-1933年的高温期，这与20世纪20年代整个中国北部发生极端干旱事件的时间重合。重建中的两个低温期分别为1883-1888年和1938-1942年。随着全球气候变暖，研究区4-9月平均气温自20世纪70年代以来也有所上升，但没有超过1928-1933年的平均气温。除统计分析外，还利用局地干湿指数等树气候学结果对重建结果进行了验证。
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.