基于MST雷达数据的中纬对流层和低平流层大气行星波研究

汤蕾; 黄春明

doi:10.11728/cjss2016.02.175

基于MST雷达数据的中纬对流层和低平流层大气行星波研究

doi: 10.11728/cjss2016.02.175

汤蕾^1,2,
黄春明^1,2, ,

1.
武汉大学电子信息学院武汉 430072
2.
地球空间环境与大地测量教育部重点实验室武汉 430072

基金项目: 国家自然科学基金项目(41174126,41374152)和极地环境综合研究评估专项基金项目(CHINARE2015-02-03)共同资助

详细信息

通讯作者:
黄春明,E-mail:huangcm@whu.edu.cn

中图分类号: P353
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出版历程
- 收稿日期: 2015-06-30
- 修回日期: 2015-12-28
- 刊出日期: 2016-03-15

Mid-latitude Planetary Waves Observation from MST Radar Measurements in the Troposphere and Lower Stratosphere

TANG Lei^1,2,
HUANG Chunming^{1,2
, ,}

1.
School of Electronic Information, Wuhan University, Wuhan 430072
2.
Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan 430072

摘要

摘要: 通过分析中国河北香河站MST (Mesosphere-Stratosphere-Troposphere)雷达 2012-2014年的水平风场数据, 研究了北半球中纬地区对流层和低平流层 (Troposphere and Lower Stratosphere, TLS)区域大气行星波的特性. 谱分析发现, 在这一区域准16天波和准10天波占据主导地位, 准16天波更为显著. 在对流层区域, 行星波具有丰富的频谱成分, 活动具有间断性, 持续时间一般不超过三个月, 并没有明显的季节性变化特征, 其中纬向分量的振幅大于经向分量. 在平流层区域(高度17km以上), 行星波一般出现在冬季, 并且主要在纬向分量中. 通常平流层区域的振幅要小于对流层区域. 结合MERRA再分析资料分析了强行星波传播特性, 结果表明: 2014年2-3月纬向分量中的准16天波垂直向上传播, 垂直波长约为64km, 纬圈波数约为2, 纬向传播方向自西向东, 水平波长约为15324.7km, 对应的相速度为11.1m·s^-1 (向东为正); 2014年5月纬向分量中的准10天波在10~18km高度范围内向下传播, 垂直波长约为50km, 纬圈波数约为1, 传播方向自西向东, 水平波长约为 30649.4km, 对应相速为35.5m·s^-1.
- 行星波 /
- 对流层和平流层 /
- MST雷达
Abstract: Characteristics of the Planetary Waves (PW) in the Troposphere and Lower Stratosphere (TLS) were investigated with Mesosphere-Stratosphere-Troposphere (MST) radar wind measurements in Xianghe (116.9°E, 39.8°N) from January 2012 to December 2014. Spectral analyses show that the TLS region is dominated by quasi-16-day and quasi-10-day PW, while the former ones are more significant. In the troposphere regions (above 17km height), the PW with dynamic periods are primarily observed, which last less than three months and don't indicate significant seasonal variation. Meanwhile, the amplitudes of the PW in the zonal direction exceed those in the meridional direction. In the lower stratosphere regions, intense PW mainly occur in the zonal component in winter. The amplitudes in the stratosphere are generally smaller than those in the troposphere. This paper also discusses the propagation characteristics of PW based on MST radar data and MERRA reanalysis data. The result shows that zonal component of the quasi-16-day PW observed in February and March 2014 propagated eastward with a zonal wave number of 2 (the horizontal wave length was about 15324.7km). The corresponding phase velocity was 11.1m·s^-1 (positive eastward). The quasi-16-day PW propagated upward vertically with a 64km vertical wave length. In addition, the observation in May 2014 showed that the quasi-10-day PW in the zonal component propagated eastward with a zonal wave number of 1. Its horizontal wave length, phase velocity and vertical wave length were 30649.4km, 35.5m·s^-1 and 50km respectively.
- Planetary Waves (PW) /
- Troposphere and Lower Stratosphere (TLS) /
- MST radar

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