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Tree-ring-based May–July mean temperature history for Lüliang Mountains, China, since 1836

DOI: 10.1007/s11434-010-3235-z

Keywords: Lüliang Mountains,Pinus tabulaeformis Carr.,tree-ring width,temperature,reconstruction

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Abstract:

As a consequence of recent global warming and its social impact, regional climate change is attracting an increasing amount of attention from scientists. A May–July temperature proxy extending back to 1836 was developed from tree-ring width of Chinese pine (Pinus tabulaeformis Carr.) found in the middle Lüliang Mountains, northern China. Correlations with climatic data from six nearby meteorological stations range from 0.58 to 0.65, indicating a strong response of tree-ring index to May–July mean temperatures, which were subsequently reconstructed. The reconstruction captures 45% (F=38.474, P<0.001) of the regional variance in the instrumental data over the calibration period 1955–2003. Reconstructed warm and cold periods were verified by additional temperature reconstructions based on tree-ring data from northern China. In addition, the reconstruction was significantly correlated with May–July mean temperatures from 13 other meteorological stations in northern China, suggesting that our reconstruction is also representative of north-central China. The warming trend during the second half of the 20th century is seen in the reconstruction, but only the 1994–2002 mean temperature seems unprecedented over the whole reconstructed period.

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