Trends of the Vertical Component of the Wave Activity Flux in the Northern Hemisphere

IF 0.7 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS

Geomagnetism and Aeronomy Pub Date : 2024-10-27 DOI:10.1134/S0016793224600632

K. A. Didenko, T. S. Ermakova, A. V. Koval, E. N. Savenkova

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Abstract

Long-term trends of the three-dimensional Plumb wave activity flux are studied using data from the JRA-55 global atmospheric reanalysis. The vertical component of the Plumb flux characterizes the propagation of atmospheric planetary waves generated in the troposphere to the upper atmosphere and is used for the analysis of the stratosphere–troposphere dynamic interaction. The study of the wave activity flux covers three latitudinal sectors of the Northern Hemisphere from December to March for a 64-year period since 1958. It is shown that in January and March over the Russian Far East there is a statistically significant trend for an increase in the wave activity flux from the troposphere to the stratosphere, which can contribute to an increase in the frequency of cold wave formation in the mid-latitude troposphere. The study of the stratosphere–troposphere dynamic interaction in general and wave activity fluxes in particular is necessary for solving problems related to both global and regional climatic changes and mixing of long-lived atmospheric components.

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北半球波浪活动通量垂直分量的变化趋势

利用 JRA-55 全球大气再分析数据，研究了三维 Plumb 波活动通量的长期趋势。Plumb 通量的垂直分量描述了对流层产生的大气行星波向高层大气传播的特征，用于分析平流层-对流层的动态相互作用。对波活动通量的研究涵盖了自 1958 年以来 64 年间北半球 12 月至 3 月的三个纬度段。结果表明，在俄罗斯远东地区的 1 月和 3 月，从对流层到平流层的波活动通量在统计上有明显增加的趋势，这可能会导致中纬度对流层寒潮形成频率的增加。要解决与全球和区域气候变化以及长寿命大气成分混合有关的问题，就必须研究平流层与对流层之间的一般动态相互作用，特别是波活动通量。

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来源期刊

Geomagnetism and Aeronomy Earth and Planetary Sciences-Space and Planetary Science

CiteScore

1.30

自引率

33.30%

发文量

审稿时长

4-8 weeks

期刊介绍： Geomagnetism and Aeronomy is a bimonthly periodical that covers the fields of interplanetary space; geoeffective solar events; the magnetosphere; the ionosphere; the upper and middle atmosphere; the action of solar variability and activity on atmospheric parameters and climate; the main magnetic field and its secular variations, excursion, and inversion; and other related topics.