| 凝结潜热在高原涡东移发展不同阶段作用的初步研究 |
| |
| 引用本文： | 董元昌,李国平.凝结潜热在高原涡东移发展不同阶段作用的初步研究[J].成都信息工程学院学报,2014,29(4):400-407. |
| |
| 作者姓名： | 董元昌 李国平 |
| |
| 作者单位： | 成都信息工程学院大气科学学院,四川成都,610225 |
| |
| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目，国家自然科学基金资助项目，财政部、科技部公益性行业(气象)科研专项基金资助项目 |
| |
| 摘 要： | 为探讨潜热加热对高原涡发展的作用并加深对水汽与高原涡垂直结构及发展变化关系的认识。应用NCEP(1°×1°)再分析资料,通过大气热源诊断计算,分析2005年5月1~4日和2005年6月23~28日两次高原涡的垂直结构及生命史特征。通过比湿、涡度、Q2等诊断量的对比分析发现:高原涡在东移发展过程中,涡柱内水汽含量上升、涡度明显加强,水汽、涡度上传明显,两者在垂直方向的大值中心有较好的同步性。高原涡未下坡前,水汽通过凝结释放潜热的方式加热大气,高原涡暖中心结构明显。高原涡下坡过程中,其涡度和垂直速度均整层陡增,高原涡区域水汽含量下降,潜热加热作用减弱,暖中心结构消失。因此,大气中水汽的含量和垂直分布状况直接影响凝结潜热作用的发挥,凝结潜热对高原涡发展作用主要表现在高原涡下坡前和下坡后期,是高原涡下坡后是否继续东移发展的重要影响因素。
|
| 关 键 词： | 气象学 天气动力学 高原涡 潜热加热 垂直结构 东移 下坡 |
A Preliminary Study on the Role Played by Latent Heating During the Different Periods of the Tibetan Plateau Vortex's Eastward Movement and Development |
| |
| DONG Yuan-chang,LI Guo-ping.A Preliminary Study on the Role Played by Latent Heating During the Different Periods of the Tibetan Plateau Vortex's Eastward Movement and Development[J].Journal of Chengdu University of Information Technology,2014,29(4):400-407. |
| |
| Authors: | DONG Yuan-chang LI Guo-ping |
| |
| Institution: | 1.College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China) |
| |
| Abstract: | In order to discuss the affection of latent heating due to water vapor during the different periods of the Tibetan Plateau vortex（TPV）＇s development and know more about the relationships between water vapor and TPV＇s vertical structure and development.the vertical structure and life cycle of two TPVs processes which happened during 1-4 May 2005（＂5.01＂process）and 23-28 June 2005（＂6.23＂process）are analyzed by Calculating and diagnosing the atmospheric heat source based on the NCEP （1° × 1°） final-analysis data.The results show that when the two TPV processes moving eastwards,the water vapor and vorticity in the vortex column are strengthened significantly and moved up obviously,the center of the maximum value of them has better synchronization in the vertical direction.Before downhill,water vapor makes the low vortex always in different height to keep a warm center structure by means of condensation latent heat release.During the process of downhill,the vorticity and vertical velocity are increased rapidly in the whole layer,while the volume of water vapor decreased and the warm center disappeared.The results show that the volume and vertical distribution directly affect the role played by latent heating.The affection of latent heating mainly occurred before downhill and in the late after downhill,which is the main factor of whether the TPVs develop to the east or not. |
| |
| Keywords: | meteorology weather dynamics Tibetan Plateau vortex latent heating vertical structure downhill process |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
