Effect of QBO and ENSO on the Solar Cycle Modulation of Winter North Atlantic Oscillation
Effect of QBO and ENSO on the Solar Cycle Modulation of Winter North Atlantic Oscillation
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DOI：
10.2151/jmsj.85.889
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发表时间：
2007-12
影响因子：
3.1
通讯作者：
Y. Kuroda
中科院分区：
文献类型：
--
作者：
Y. Kuroda
通过对1958—2000年观测资料的分析，考察了准两年期涛动（QBO）和厄尔尼诺南方涛动（ENSO）对冬季平均北大西洋涛动（NAO）11年太阳周期调制的影响。发现，虽然分离，但在50 hPa QBO风的西风相和ENSO的冷相中，NAO的太阳周期调制增强更为强烈。这些影响在统计上是困难的。在这些相位上，冬季平均 NAO 的信号更多地延伸到平流层上层，而夏季 AO 在高太阳年中再现得更强，而在低太阳年中信号则较弱。
The effect of the Quasi-Biennial Oscillation (QBO) and the El Nino Southern Oscillation (ENSO) on the 11-year solar cycle modulation of the winter-mean North Atlantic Oscillation (NAO) is examined through analysis of observational data from 1958 to 2000. It is found that the solar cycle modulation of the NAO is more strongly enhanced in the westerly phase of the 50-hPa QBO wind and the cold phase of ENSO, although separation of these effects is statistically difficult. On these phases, the signal of the winter-mean NAO extends more to the upper stratosphere and summer-AO reappears more strongly in high solar years, whereas the signal is weaker throughout in low solar years.