收稿日期: 2019-09-11
修回日期: 2019-11-02
网络出版日期: 2020-02-12
基金资助
国家自然科学重点基金项目“我国典型夏季风影响过渡区陆—气相互作用及其对夏季风响应研究”(41630426);中国科学院陆面过程与气候变化重点实验室开放基金项目“西北地区东部大气边界层变化特征及其对夏季风活动的响应”(LPCC2016005)
Dynamic Relationship Between Entrainment Rate and Summer Monsoon in the Transition Area of Monsoon in the East of Northwest China
Received date: 2019-09-11
Revised date: 2019-11-02
Online published: 2020-02-12
Supported by
the National Natural Science Foundation of China "Study on land-air interaction and its response to summer monsoon in transition area affected by typical summer monsoon in China"(41630426);The Open Fund of the Key Laboratory of Land Surface Process and Climate Change of the Chinese Academy of Sciences "Characteristics of atmospheric boundary layer variation in the East of Northwest China and its response to summer monsoon activities"(LPCC2016005)
夹卷率指上升单位距离卷入的周围空气质量与空气质量的比率,包括湍流夹卷和动力夹卷,应用于对流云的边界层参数化、数值模式改进、云滴谱离散度观测及热带气旋的研究中。应用西北东部季风过渡区民勤、榆中、平凉、银川和延安等5站2006—2016年5~9月逐日07时和19时每隔10 m高度的高空加密观测资料,结合地面逐日观测资料,计算不同高度夹卷率,得出不同区域夹卷率与高度、季风期降水和季风的关系。结果表明:
李岩瑛 , 蔡英 , 张春燕 , 曾婷 , 杨吉萍 . 西北东部季风过渡区夹卷率与夏季风的动力学关系[J]. 地球科学进展, 2019 , 34(12) : 1316 -1327 . DOI: 10.11867/j.issn.1001-8166.2019.12.1316
Entrainment rate refers to the ratio of surrounding air quality to air quality involved in rising unit distance, including turbulent entrainment and dynamic entrainment, which are applied to the boundary layer parametrization of convective clouds, the improvement of numerical model, the observation of cloud droplet spectral dispersion and the study of tropical cyclones.Based on the daily data at 07:00 and 19:00 every 10 m of five stations such as Minqin, Yuchong, Pingliang, Yinchuan and Yan'an from May to September during 2006-2016, combined with the daily observation data on the ground, the Entrainment Rates(ER) of different heights were calculated, and the relationships between ER and height in different regions, precipitation as well as monsoon during the monsoon period were further obtained. The main results were as follows:
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