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《JOURNAL OF GLACIOLGY AND GEOCRYOLOGY》 2000-01
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Reconstruction of A 1835 a Past Climate for Dulan, Qinghai Province, Using Tree-Ring

KANG Xing-cheng; ZHANG Qi-hua; GRAUMLICH Lisa J; SHEPPARD Paul . ( Lanzhou Institute of Glaciology and Geoerylogy, CAS, Lanzhou Gansu 730000, China; Laboratory of Tree-Ring Research, University of Arizona, Tucson, Arisona, USA)  
A 1835 a tree-ring chronology from the Qilian jumper(Sabina Przewalskii ) has been established based on 135 specimens. The tree-ring data from tree core were collected at Ela Mountains, ranging from 3 100 to 3 700 m a.s.l. in Dulan, Qinghai Province. The studied area is local at the northeast of Tibetan plateau, and between Kunlun and Qinghai-Nanshan Mountains, with average elevation of above 3 500 m. The average annual precipitation in this region is 180 ~ 200 mm and the annual mean temperature is 0.3℃, thus it is a typical dry, high and cold area. The tree-ring series were cross-dated and measured using standard techniques, at the Laboratory of Tree-ring Research in the University of Arizona. The tree-ring chronology was compared directly to the monthly temperature and precipitation data from the closest Dulan meteorological observatory near the sampling Sites. Response function and linear regrssion analyses indicate that there are better relation of tree-ring width to mean temperature of September ~ November and precipitation of March~ June. Response surface analyses indicate that there is a good linear regrssion between tree-ring width and climate elements while it is low temperature and few precipitation. and a bad relation of that when it is high temperature and large precipitation. At the same time, based on ground temperature, soil containing water and sunlight in the studied area, it is educe that relation of tree-ring width and mean temperature of autumn, which indicate that the growing season of Jumpers is summer and autumn in the high altitude area of the Tibetan Plateau. Therefore mean temperature of September - December call be reconstruced in Dulan using tree-ring chronology.
【Fund】: 国家重点基础研究专项经费资助;; 中国科学院青藏高原研究项目!KZ951-A1-204-02;; 中国科学院“九五”重大项目!“亚洲季风
【CateGory Index】: P467
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