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学科主题: Meteorology & Atmospheric Sciences
题名: Impact on quantitative precipitation forecasts of 4D-Var rainfall data assimilation with a modified digital filter in favor of mesoscale gravity waves: A case study
作者: Peng, SQ ; Zou, XL
通讯作者: speng@scsio.ac.cn
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
发表日期: 2010
卷: 115, 页:#NAME
收录类别: sci
部门归属: [Peng, Shiqiu] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Trop Marine Environm Dynam, Guangzhou 510301, Guangdong, Peoples R China; [Peng, Shiqiu; Zou, Xiaolei] Florida State Univ, Dept Meteorol, Tallahassee, FL 32306 USA; [Zou, Xiaolei] Nanjing Univ Informat Sci & Technol, Ctr Data Assimilat Res & Applicat, Nanjing, Peoples R China
项目归属: LED
摘要: A modified digital filter in favor of mesoscale gravity waves was developed and applied to a real case study of rainfall assimilation using the four-dimensional variation data assimilation (4D-Var) approach. The results show that the rainfall assimilation experiment with the modified digital filter produced further improvements in quantitative precipitation forecasts compared with the rainfall assimilation experiment with a regular digital filter. Spectral analysis confirms that the mesoscale gravity waves were intensified not only within the rainfall assimilation window during which the modified digital filter was applied but also beyond the assimilation window. The gravity wave-induced vertical motions along the direction of wave propagation were also intensified, resulting in a more realistic time evolution of the precipitation pattern. It is also found that the assimilation of 6 h accumulated rainfall outperformed the assimilation of hourly rainfall within the same 6 h window.
原文出处: 查看原文
WOS记录号: WOS:000285017500003
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/6189
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Peng, SQ; Zou, XL.Impact on quantitative precipitation forecasts of 4D-Var rainfall data assimilation with a modified digital filter in favor of mesoscale gravity waves: A case study,JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2010,115():#NAME
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文件名: Impact on quantitative precipitation forecasts of 4D-Var rainfall data assimilation with a modified digital filter in favor of mesoscale gravity waves A case study .pdf
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