Reconstructed annual precipitation series for Scotland (1861 – 1991): Spatial and temporal variations, and links to the atmospheric circulation
Reconstructed annual precipitation series for Scotland (1861 – 1991): Spatial and temporal variations, and links to the atmospheric circulation
复制标题
重建的苏格兰年降水量系列（1861 – 1991）：时空变化以及与大气环流的联系
DOI：
10.1080/00369220600830771
复制
发表时间：
2006
影响因子：
1
通讯作者：
I. Phillips
中科院分区：
文献类型：
--
作者：
N. Macdonald;I. Phillips
摘要本文利用非标准资料建立了苏格兰13个地区（1861 - 1991）的年均匀降水序列。虽然英国的降雨量系列代表了大多数英国降雨量记录的骨干在二十世纪中叶之前，本文返回到原始记录，研究苏格兰降水的空间和时间变化。记录进行趋势分析和主成分分析（PCA），然后与大气环流参数，以了解天气尺度机制。在1870 - 1991年期间，苏格兰西部（东部）的降水量呈上升（下降）趋势。苏格兰西部（东部）的降水变化最好用西风环流（压力）的波动来解释，在低于平均压力的年份，西-东降水梯度接近，北风和/或东风的频率更高。降水趋势不能用大气环流模式的变化来解释，这表明必须涉及其他因素。
Abstract This paper constructs annual homogenised precipitation series for 13 locations in Scotland (1861 – 1991) from non-standard sources. Whilst the British Rainfall series represents the backbone of most UK rainfall records before the middle of the twentieth century, this paper returns to the original records to examine spatial and temporal variations in Scottish precipitation. The records were subjected to trend analysis and principal components analysis (PCA), and then related to atmospheric circulation parameters to understand the synoptic-scale mechanisms involved. Upward (downward) trends in precipitation were noted in western (eastern) Scotland over the period 1870 – 1991. Precipitation variability in western (eastern) Scotland is best explained by fluctuations in the westerly circulation (pressure), with the west-east precipitation gradient closing in those years with below average pressure, and a greater frequency of northerly and/or easterly winds. Precipitation trends cannot be explained by changes in atmospheric circulation patterns, suggesting that other factors must be involved.