杨旭. 2020. 两种微物理方案对夏季东北亚阻塞过程影响的数值模拟结果分析[J]. 气象学报, (0):-, doi:10.11676/qxxb2020.041
两种微物理方案对夏季东北亚阻塞过程影响的数值模拟结果分析
Analysis of the Numerical Simulation Results of the effects with Two Microphysical Schemes on the Blocking Process over the Northeastern Asia in Summer
投稿时间:2019-05-27  修订日期:2019-09-03
DOI:10.11676/qxxb2020.041
中文关键词:  数值模拟,阻高,微物理方案,非绝热加热
英文关键词:Numerical simulation, Blocking, Microphysical scheme, Diabatic heating
基金项目:国家自然科学基金(41630424,41741021,41875119)
作者单位E-mail
杨旭 吉林省气象科学研究所 573638911@qq.com 
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中文摘要:
      选用FNL再分析资料,利用中尺度模式WRF对2011年7月25日-8月3日的一次东北亚阻塞高压过程进行数值模拟试验。通过数值对比试验,讨论有冰相物质和无冰相物质的两种微物理方案对此次阻塞高压过程的强度和维持时间模拟的差异,并简要阐述原因。结果表明:中尺度模式WRF对阻塞高压过程有较好的模拟效果,有冰相物质的微物理方案模拟的阻高强度及维持时间较接近实况,整体阻塞闭合环流形式、高压中心值、中心位置、强度以及中心上下游的低压槽强度均与实况接近;无冰相物质的微物理方案模拟阻塞高压在500hPa及200hPa平均位势高度场上没有闭合的高值中心出现,500hPa阻塞高压强度弱,持续时间短,200hPa则相反。进一步研究发现,这两种差异主要由阻塞高压活动区域内的非绝热加热不同引起的,它对阻塞高压高形成的强度和维持时间具有很好的指示意义。另外,阻塞高压附近区域的微物理潜热释放对阻塞过程的强度和维持时间也有一定影响
英文摘要:
      Abstract: In this paper, the author use the mesoscale model WRF to simulate a blocking process of Northeast Asia in 3 -8 July 25, 2011 by FNL reanalysis data. Through comparative experiments, discuss the simulation ability of the WRF model for the blocking process strength and maintenance time under the condition of ice phase microphysical scheme or without,and simply analyze the reasons. The results show that the WRF model has a good simulation effect on this blocking process. The simulation results of microphysical schemes with ice-phase materials are more close to the reality, The whole blocking closed circulation, the high pressure center value, the center position, the strength and the strength of the low pressure trough upstream and downstream of the center are all close to the actual situation; But without ice-phase materials simulation results that 500hPa blocking high pressure is weak and the blocking''s duration is short. 200 hPa is the opposite. and the closed circulation of blocking high pressure does not appear in the 500 hPa and 200 hPa average potential height field, Further study shows that the two differences are mainly caused by the different diabatic heating in the blocking activity area. The diabatic heating in the blocking activity area has a good indication for the strength and duration of blocking. In addition the Microphysical latent heat release nearby the blocking domain area also has some influence on the strength and maintenance time of the blocking process.
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