11-year solar cycle in the stratosphere extracted by the empirical mode decomposition method

被引：162

作者：

Coughlin, KT ^{[1
]}

Tung, KK ^{[1
]}

机构：

[1] Univ Washington, Seattle, WA 98195 USA

来源：

SOLAR VARIABILITY AND CLIMATE CHANGE | 2004年 / 34卷 / 02期

基金：

美国国家科学基金会;

关键词：

solar cycles; stratosphere; empirical mode decomposition method;

D O I：

10.1016/j.asr.2003.02.045

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

We apply a novel method to extract the solar cycle signal from stratospheric data. An alternative to traditional analysis is a nonlinear empirical mode decomposition (EMD) method. This method is adaptive and therefore highly efficient at identifying embedded structures, even those with small amplitudes. Using this analysis, the geopotential height in the Northern Hemisphere can be completely decomposed into five non-stationary temporal modes including an annual cycle, a QBO signal, an ENSO-like mode, a solar cycle signal and a trend. High correlations with the sunspot cycle unambiguously establish that the fourth mode is an 11-year solar cycle signal. (C) 2004 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：323 / 329

页数：7