A PRELIMINARY RECONSTRUCTION OF RAINFALL IN NORTH-CENTRAL CHINA SINCE AD 1600 FROM TREE-RING DENSITY AND WIDTH
A PRELIMINARY RECONSTRUCTION OF RAINFALL IN NORTH-CENTRAL CHINA SINCE AD 1600 FROM TREE-RING DENSITY AND WIDTH
复制标题
DOI：
10.1006/qres.1994.1056
复制
发表时间：
1994-07-01
影响因子：
2.3
通讯作者：
GARFIN, GM
中科院分区：
文献类型：
--
作者：
HUGHES, MK;WU, XD;GARFIN, GM
利用华山松年轮密度和年轮宽度资料，重建了公元1600年至1988年间中国中北部华山地区5-6月和4-7月的降水量。MJ降水(基于年轮宽度和最大晚材密度)与当地仪器数据进行了校准和交叉验证，其强度比AJ降水(仅基于年轮宽度)更大。当地纪录片来源证实，20世纪20年代中后期重建了一场大干旱。这场干旱(在1929年达到顶峰)是MJ在389年中最严重的一次，对AJ来说是第二严重的，仅次于1683年结束的一次事件。两次重建都没有显示出低于10年1的频率下的频谱功率，但都显示了2.1年至2.7年和3.5年至9年之间的功率集中。这两次重建与基于文献来源的区域干旱/湿度指数(DW)之间存在显著的相关性，特别是在高频情况下。这些相关性集中在7.6年至7.3年、3.8年至3.6年和2.5年期间。利用奇异谱分析，在MJ降水重建和基于文献的DW指数中识别出周期接近7.2年的准周期行为。(C)1994年华盛顿大学。
May-June (MJ) and April-July (AJ) precipitation at Huashan in north-central China has been reconstructed for the period A.D. 1600 to 1988 using tree-ring density and width from Pinus armandii. MJ precipitation (based on ring width and maximum latewood density) calibrated and cross-validated against local instrumental data more strongly than AJ precipitation (based only on ring width). A major drought was reconstructed for the mid- and late 1920s, confirmed by local documentary sources. This drought (culminating in 1929) was the most severe of the 389-yr period for MJ and second most severe for AJ, after an event ending in 1683. Neither reconstruction shows much spectral power at frequencies lower than 1 in 10 yr, but both show concentrations of power between 2.1 and 2.7 yr and 3.5 to 9 yr. There are significant correlations between the two reconstructions and a regional dryness/wetness index (DW) based on documentary sources, particularly at high frequencies. These correlations are focused in the 7.6- to 7.3-, 3.8- to 3.6-, and 2.5-yr periods. Using singular spectrum analysis, quasiperiodic behavior with a period close to 7.2 yr was identified in the MJ precipitation reconstruction and in the DW index based on documents. (C) 1994 University of Washington.