气象科学2025，Vol.45Issue(3)：378-384,7.DOI:10.12306/2023jms.0086
不同波数行星波对冬季各月北半球平流层1980s—1990s变化的影响
On influence of planetary waves with different wavenumbers to the 1980s—1990s changes during winter months in the Northern Hemisphere stratosphere
摘要
Abstract
To investigate the differences in stratospheric climate changes during various winter months at the end of the 20th century,the daily ERA5 and NCEP/NCAR data was used to study the decadal changes of the stratosphere in terms of polar vortex intensity and planetary wave forcing,with a particular focus on the contributions of wave 1,wave 2,and wave 3.Results found that in December,wave 1 dominated,with an increased upward propagation of wave 1 in the mid-to-high latitude stratosphere and a weakened upward propagation of wave 2 only in the mid latitude stratosphere.In February,wave 2 predominated,with a significant weakening of its upward propagation in the mid-to-high latitude stratosphere and a decrease in the upward propagation of wave 1 only in the polar region low stratosphere.Wave 3 primarily led to a weakening of propagation along low latitude waveguides in December and an enhancement in February.Further study indicated that the changes in planetary wave propagation associated with the polar vortex in the stratosphere.In December,along with the strengthened propagation along polar waveguides,the polar vortex weakened,warmed,and the mean zonal wind decelerated.In February,with the weakened propagation along polar waveguides,the polar vortex strengthened,cooled,and the mean zonal wind accelerated.关键词
平流层/行星波/傅里叶分析/年代际变化Key words
stratosphere/planetary wave/Fourier analysis/decadal change分类
天文与地球科学引用本文复制引用
徐凡森,吴国华,刘仁强,杨婷..不同波数行星波对冬季各月北半球平流层1980s—1990s变化的影响[J].气象科学,2025,45(3):378-384,7.基金项目
广东省重点领域研发计划项目(2020B1111200001) （2020B1111200001）
