| Weather and Climate |
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| Reconstruction of Precipitation of Previous August to Current June During 1821-2008 in the Eastern Qilian Mountains |
| LI Ying-jun1, GOU Xiao-hua1, FANG Ke-yan1, YANG Tao1, DENG Yang1, MAN Zi-hong2 |
1.Research School of Arid Environment & Climate Change, Lanzhou University, Lanzhou 730000, China;
2.Administration Bureau of Liancheng National Nature Reserve of Gansu, Lanzhou 730333, China |
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Abstract A tree-ring width chronology was presented based on Pinus tabulaeformis tree-ring samples from the Eastern Qilian Mountains, China, and a precipitation series for previous August to Current June in the Eastern Qilian Mountains during 1821-2008 were reconstructed. The reconstructed precipitation data can explain 48.8% of the actual precipitation variance during the recent 118 years. During the period, persistently wet periods were found in 1850s-1860s, the end of 1930s-1950s, 1970s-1990s and 2000s; and persistently drought periods were found in 1830s-1840s, 1900s, and 1920s. The drought epoch during 1920s was widespread in northern China. We compared this precipitation reconstruction sequence with the precipitation or PDSI reconstructions data, and found that the precipitation change in Eastern Qilian Mountains was the most similar with precipitation change in the Helan Mountains, especially during the period of 1820s-1940s. And after 1940s, the precipitation change in Eastern Qilian Mountains was more similar with precipitation change in Delingha of QingHai Province and MidWest of Qilian Mountains. So we supposed that the Eastern Qilian Mountains were probably controlled by different climate styles before 1940s and after 1940s.
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Received: 31 January 2012
Published: 20 September 2012
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2012, Vol. 32 
