The 11-Yr Solar Cycle in ERA-40 Data: An Update to 2008
The 11-Yr Solar Cycle in ERA-40 Data: An Update to 2008
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DOI：
10.1175/2009jcli3150.1
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发表时间：
2010-04-15
影响因子：
4.9
通讯作者：
Gray, Lesley J.
中科院分区：
文献类型：
--
作者：
Frame, Thomas H. A.;Gray, Lesley J.
利用ECMWF再分析（ERA-40）资料，采用多元线性回归方法对11年太阳活动周的纬向平均纬向风和温度信号进行了诊断。利用ECMWF业务分析数据，将以前研究的结果扩展到2008年。这一分析证实，以前研究中发现的太阳信号与El Chichon和Pinatubo火山爆发产生的火山气溶胶强迫不同，但它突出了太阳信号和平流层下部温度趋势混淆的可能性。还提出了对克鲁克斯和格雷以前的结果中存在的错误的修正，该错误源于使用单个每日分析字段而不是每月平均数据。
Multiple linear regression is used to diagnose the signal of the 11-yr solar cycle in zonal-mean zonal wind and temperature in the 40-yr ECMWF Re-Analysis (ERA-40) dataset. The results of previous studies are extended to 2008 using data from ECMWF operational analyses. This analysis confirms that the solar signal found in previous studies is distinct from that of volcanic aerosol forcing resulting from the eruptions of El Chichon and Mount Pinatubo, but it highlights the potential for confusion of the solar signal and lower-stratospheric temperature trends. A correction to an error that is present in previous results of Crooks and Gray, stemming from the use of a single daily analysis field rather than monthly averaged data, is also presented.