LIU Zimu,LIU Yunfeng,ZHENG Hao,et al.Seasonal Variation Characteristics of High-Altitude Jet Streams in East Asia and Their Impact on Aviation Flight[J].Journal of Chengdu University of Information Technology,2025,40(04):503-510.[doi:10.16836/j.cnki.jcuit.2025.04.015]
东亚高空急流的季节变化特征及其对航空飞行的影响
- Title:
- Seasonal Variation Characteristics of High-Altitude Jet Streams in East Asia and Their Impact on Aviation Flight
- 文章编号:
- 2096-1618(2025)04-0503-08
- 分类号:
- P442
- 文献标志码:
- A
- 摘要:
- 为进一步认识东亚高空急流随季节的气候变化特征及其对航空飞行的影响,利用ERA5再分析资料,采用气候学统计方法,分析1979-2021年东亚高空急流的气候特征。结果表明:东亚高空急流的强度和发生频数在冬季最强,夏季最弱,4月和7月急流强度减弱明显,秋季急流增强显著。随着季节的变化,东亚高空急流有明显的南北移动,北移在4-5、7月最明显,南移主要发生在10-11月,在南北移动的同时,东西移动也随之发生。高空急流中强的垂直和水平风切变是航空飞行中值得关注的区域,东亚高空急流中的垂直风切变强度随季节变化不明显,而水平风切变季节变化明显,东亚高空急流大风速区与强垂直风切变区位置存在偏移,急流轴南侧(25 °N～35 °N)的垂直风切变普遍强于北侧(35 °N～45 °N)。
- Abstract:
- To further understand the seasonal climate change characteristics of the East Asian high-altitude jet stream and its impact on aviation flight,Using ERA5 reanalysis data and statistical methods of jet climatology,the climate characteristics of high-altitude jet streams in East Asia from 1979 to 2021 were analyzed.The results show that the intensity and frequency of the East Asian high-altitude jet stream are strongest in winter and weakest in summer.The intensity of the jet stream weakens significantly in April and July,and the jet stream strengthens significantly in autumn.With the change of seasons,the East Asian high-altitude jet has a significant north-south movement,with the northbound movement being most pronounced from April to May and July,and the southbound movement mainly occurring from October to November.Along with the north-south movement,the east-west movement also occurs.The strong vertical and horizontal wind shear in the high-altitude jet stream is an area worth paying attention to during flight.The intensity of vertical wind shear in the East Asian high-altitude jet stream does not vary significantly with the season,while the seasonal variation of horizontal wind shear is obvious.The high wind speed area of the East Asian high-altitude jet stream is offset from the strong vertical wind shear area,and the vertical wind shear on the south side of the jet stream axis(25 ° N-35 °N)is generally stronger than on the north side(35 °N-45 °N).
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备注/Memo
收稿日期:2023-12-22
基金项目:中国气象局大气探测重点开放实验室开放课题资助项目(2023KLAS06M); 国家重点研发计划资助项目(2023YFC3007501); 四川省科技厅资助项目(2023NSFSCO244); 高原与盆地暴雨旱涝灾害四川省重点实验室开放研究基金资助项目(SZKT202308)
通信作者:刘云丰.E-mail:709102755@qq.com