The magnitude of decadal and multidecadal variability in North American precipitation.
The magnitude of decadal and multidecadal variability in North American precipitation.
复制标题
北美降水的年代际和年代际变化幅度。
DOI：
10.1175/2009jcli3013.1
复制
发表时间：
2010
影响因子：
4.9
通讯作者：
Scott St. George
中科院分区：
文献类型：
--
作者：
T. Ault;Scott St. George
Abstract The authors use singular spectrum analysis to investigate the relative magnitude of decadal to multidecadal (D2M) variability in annual and seasonal precipitation anomalies across North America. In most places, decadal (10–20 yr) or multidecadal (20–50 yr) variability makes up less than 10% of the total variance in either annual or seasonal precipitation, with interannual variability or secular trends having much greater importance. Decadal variability is most prominent (contributing 25%–30% of the total variance) in Minnesota and northern California during winter, and the central Rocky Mountains in autumn. Eastern Quebec is the only major region where precipitation exhibits significant variance in the multidecadal band. Precipitation across much of Canada exhibits significant variance at extremely low frequencies (greater than 50 yr), but variability at these time scales cannot be separated from secular trends because of the limited length of instrumental climate records. Decadal signals in the ...
