雷暴激发的环状重力波在中高层大气中的传播特征

温颖, 张其林, 徐寄遥, 李钦增, 郜海阳. 2019. 雷暴激发的环状重力波在中高层大气中的传播特征. 地球物理学报, 62(4): 1218-1229, doi: 10.6038/cjg2019M0186
引用本文: 温颖, 张其林, 徐寄遥, 李钦增, 郜海阳. 2019. 雷暴激发的环状重力波在中高层大气中的传播特征. 地球物理学报, 62(4): 1218-1229, doi: 10.6038/cjg2019M0186
WEN Ying, ZHANG QiLin, XU JiYao, LI QinZeng, GAO HaiYang. 2019. Propagation characteristics of mesospheric concentric gravity waves excited by a thunderstorm. Chinese Journal of Geophysics (in Chinese), 62(4): 1218-1229, doi: 10.6038/cjg2019M0186
Citation: WEN Ying, ZHANG QiLin, XU JiYao, LI QinZeng, GAO HaiYang. 2019. Propagation characteristics of mesospheric concentric gravity waves excited by a thunderstorm. Chinese Journal of Geophysics (in Chinese), 62(4): 1218-1229, doi: 10.6038/cjg2019M0186

雷暴激发的环状重力波在中高层大气中的传播特征

  • 基金项目:

    国家重点研发计划资助项目(2017YFC1501505)和国家自然科学基金面上项目(41775006,41575004)联合资助

详细信息
    作者简介:

    温颖, 女, 1989年生, 在读博士研究生, 主要研究雷暴气象学.E-mail:when1013@163.com

  • 中图分类号: P401

Propagation characteristics of mesospheric concentric gravity waves excited by a thunderstorm

  • 本文使用中国科学院国家空间科学中心——子午工程朔州观测站的全天空气辉成像数据,以及FY-2气象卫星云顶亮温数据(Black Body Temperature,TBB),气象再分析数据和地闪数据,研究了2013年8月10日(LT)发生在内蒙古地区的雷暴活动激发的中高层环状重力波(Concentric Gravity Waves,CGWs)事件.根据最小二乘法的拟合结果和色散关系理论曲线,确定了激发中高层环状重力波的强对流系统,该对流中心位于内蒙古自治区中部(108.9°E,40.47°N),重力波激发于雷暴初期,此时TBB低于220 K的深对流面积较小,随着时间的推移,该次雷暴活动越来越强,深对流面积在23:00达到最大,在23:30-24:00 LT时闪电频数最高,达到120.7 fl/min,随后深对流逐渐消散.在中高层87 km处OH(羟基)气辉层观测到的一次CGWs事件的两组波纹,分别沿水平方向传播了149.64 km和174.25 km,相应位置处的水平波长分别为12.67 km和16.75 km,周期分别为8.56 min和10.72 min,激发时间分别为19:34 LT和19:40 LT;随着水平传播距离的增加,CGWs水平波长增大.

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  • 图 1 

    华北地区全天空气辉观测网位置示意图

    Figure 1. 

    Sketch showing network of all-sky airglow observations in North China

    图 2 

    全天空气辉原始数据(2013年8月10日22 : 10 : 26—22 : 11 : 30 LT)处理示意图

    Figure 2. 

    Processing scheme of all-sky airglow raw data (22 : 10 : 26—22 : 11 : 30 LT on 10 August 2013)

    图 3 

    2013年8月10日20 : 00的500 hPa位势高度场与水平风场(朔州站位置:红色三角)

    Figure 3. 

    Geopotential height fields and horizontal wind fields of 500 hPa at 20 : 00 LT on 10 August 2013. Red triangle is Shuozhou station

    图 4 

    对流系统云顶亮温(TBB)与地闪频次随时间的变化关系

    Figure 4. 

    The convective system Black Body Temperature (TBB) and CG flash varying with time

    图 5 

    FY-2系列卫星TBB(阴影区)、地闪位置(黑色十字)与朔州站位置(红色三角)

    Figure 5. 

    The distribution of FY-2 TBB (shaded areas) and CG flash location (black cross). Red triangle is Shuozhou station

    图 6 

    不同等压面高度上,对流系统垂直方向上的纬向风(左,西风为正)和经向风(右,南风为正)

    Figure 6. 

    Zonal wind (left, west wind is positive) and meridional wind (right, south wind is positive) at different constant-pressure altitudes above the convective system

    图 7 

    环状重力波A与B的位置示意图

    Figure 7. 

    Locations of CGWs A and B

    图 9 

    波形B的位置与波长(同图 8)

    Figure 9. 

    Same as Fig. 8 but for waveform B

    图 8 

    波形A的位置与波长(圆圈为波峰和波谷位置)

    Figure 8. 

    Location and wavelength of waveform A. Circles are locations of wave crest and valley

    图 10 

    22 : 05 LT的全天空气辉重力波波形(明亮处对应波峰位置,红色圆点表示)及拟合波形(绿色和蓝色圆环)和圆心(绿色和蓝色圆点)

    Figure 10. 

    The all-sky CGWs waveform (light parts, shown as red dots, are wave crest), the fitted waveform (green and blue circles) and center of a circle (green and blue dots) at 22 : 05 LT

    图 11 

    全天空OH重力波周期随水平距离的变化关系

    Figure 11. 

    Relationship of all-sky OH CGWs wave period and horizontal distance

    图 12 

    全天空OH重力波不同传播时间的水平波长与水平距离的变化关系

    Figure 12. 

    Relationship of all-sky OH CGWs horizontal wavelength and horizontal distance with different propagation period

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出版历程
收稿日期:  2018-03-23
修回日期:  2018-06-12
上线日期:  2019-04-05

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