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气象:1995,21(11):33-37
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一次MCS的尺度分离动能分析
(1.湖南省气象台,长沙 410007;2.中国气象科学研究院,北京 100081;3.湖南省气象局,长沙 410007)
An Analysis of the Scale-Separated Kinetic Energy of A Mesoscale Convective System
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中文摘要: 利用尺度分离动能方法对1994年6月11日09UTC-12日10UTC影响湖南省的一次MCS进行了研究,结果表明:1.大尺度运动中非地转风以及两种尺度间风场与气压场的相互作用产生的动能,是这次MCS的主要能源;2.中尺度动能以及两种尺度风场相互作用的动能,随MCS发展(减弱)而增加(减小);3.在MCS的整个发展阶段,高层的总体动能锐减。
Abstract:A mesoscale convective system(MCS)influenced Hunan Province during 11, 0900 -12, 1000 UTC June 1994 has been studied by the use of the scale separated kinetic energy. Results showed that (1 ) the kinetic energy generated by the ageostrophic flow in large scale motion field and by the interaction between the flow and pressure fields of the large-and meso-scale motions is the dominant source of energy; (2) the kinetic energy of the mesoscale motion and of the interaction between large-and meso-scale flow fields increases (decreases) with the MCS's development (fading);(3) the total kinetic energy of upper troposphere drastically reduced during the MCS's development phase.
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基金项目:“八五"攻关项目“85-906-08”资助
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引用文本:
方慈安,吴宝俊,常国刚,许晨海,1995.一次MCS的尺度分离动能分析[J].气象,21(11):33-37.
,1995.An Analysis of the Scale-Separated Kinetic Energy of A Mesoscale Convective System[J].Meteor Mon,21(11):33-37.