Tree-ring based drought reconstruction in the central Hengduan Mountains region (China) since AD 1655
Tree-ring based drought reconstruction in the central Hengduan Mountains region (China) since AD 1655
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DOI：
10.1002/joc.1689
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发表时间：
2008-11-30
期刊：
影响因子：
--
通讯作者：
Cao, Kun-Fang
中科院分区：
文献类型：
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作者：
Fan, Ze-Xin;Brauning, Achim;Cao, Kun-Fang
我们对中国云南西北部横断山脉中部的三个树种（丽江云杉、针叶林和冷杉）进行了四种树木年轮宽度的年表分析。虽然这四个年表来自不同的物种，但年表之间存在显着的相关性（平均r = 0.47），并且第一主成分占其共同时期1655-2005年总方差的60.5%。相关和响应函数分析表明，季风前（3月、4月）降水量、相对湿度和帕尔默干旱严重指数（PDSI）对树木径向生长有正向影响，而3月温度对树木生长有负向影响。这表明树木的生长通常受到春季水分供应的限制。春季（3-5月）干旱重建经独立数据验证，占1951-2000年共同时期实际PDSI方差的42%。湿泉发生在公元 1690 年代、1715-1730、1750 年代、1780 年代、1825-1850、1900 年代、1930-1960 和 1990 年至今。干泉发生在公元1700-1715年、1733-1745年、1790-1820年、1860-1890年、1910-1925年和1960-1990年期间。版权所有 (C) 2008 英国皇家气象学会
We developed four tree ring-width chronologies of three species (Picea likiangensis Pritz, Taiga dumosa (D. Don) Eichler and Abies ernestii Rehd.) in the central Hengduan Mountains, north-western Yunnan, China. Although the four chronologies come from different species, significant correlations exist among the chronologies (mean r = 0.47), and the first principal component accounts for 60.5% of total variance over their common period 1655-2005. Correlation and response function analyses showed that pre-monsoon (March, April) precipitation and relative humidity and Palmer drought severity index (PDSI) have positive effects on radial growth, while temperature in March influences tree growth negatively. This indicates that tree growth is generally limited by spring-moisture availability. The spring (March-May) drought reconstruction was verified with independent data, and accounts for 42% of the actual PDSI variance during their common period 1951-2000. Wet Springs Occurred during AD 1690s, 1715-1730, 1750s, 1780s, 1825-1850, 1900s, 1930-1960 and 1990-present. Dry Springs Occurred during AD 1700-1715, 1733-1745, 1790-1820, 1860-1890, 1910-1925, and 1960-1990. Copyright (C) 2008 Royal Meteorological Society