Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0294.1 |
On the Scale Interactions that Dominate the Maintenance of a Persistent Heavy Rainfall Event: A Piecewise Energy Analysis | |
Fu, Shen-Ming1; Liu, Rui-Xin2; Sun, Jian-Hua2,3 | |
2018-03-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:3页码:907-925 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Persistent heavy rainfall events (PHREs) are the product of the combined effects of multiscale systems. A PHRE that occurred during the 2016 mei-yu season was selected to further the understanding of the scale interactions accounting for the persistence of this type of event. The scale interactions were analyzed quantitatively using a piecewise energy budget based on temporal scale separation. Results show that the strongest interactions between the precipitation-related eddy flow and its background circulation (BC) occur in the mid-to lower troposphere, where a significant downscale kinetic energy (KE) cascade alone dominates eddy flow persistence. An obvious upscale KE cascade (i.e., a feedback effect) appears in the mid-to upper troposphere but has a negligible effect on the BC. Overall, within the precipitation region, the downscale KE cascade is primarily dependent on BC signals with shorter periods, whereas the upscale KE cascade is more dependent on BC signals with longer periods. Thus, the BC has asymmetric effects on the KE cascades. The most significant BC signal as determined via wavelet analysis [i.e., quasi-biweekly (10-18 days) oscillations in this event] does not play the leading role in the downscale KE cascade. Instead, the quasi-weekly oscillations provide the maximum amount of energy for eddy flow maintenance. Semi-idealized simulations of various BC signals show similar results: precipitation and the intensities of lower-level shear lines and transversal troughs (both of which are closely related to the precipitation-related eddy flow) are more sensitive to the quasi-weekly oscillation than to the quasi-biweekly oscillation. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000429576900012 |
WOS关键词 | PART I ; PARAMETERIZATION ; SYSTEM |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29419 |
专题 | 地球科学 |
作者单位 | 1.Chinese Acad Sci, Int Ctr Climate & Environm Sci, Inst Atmospher Phys, Beijing, Peoples R China; 2.Chinese Acad Sci, Inst Atmospher Phys, Lab Cloud Precipitat Phys & Severe Storms, Beijing, Peoples R China; 3.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Fu, Shen-Ming,Liu, Rui-Xin,Sun, Jian-Hua. On the Scale Interactions that Dominate the Maintenance of a Persistent Heavy Rainfall Event: A Piecewise Energy Analysis[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(3):907-925. |
APA | Fu, Shen-Ming,Liu, Rui-Xin,&Sun, Jian-Hua.(2018).On the Scale Interactions that Dominate the Maintenance of a Persistent Heavy Rainfall Event: A Piecewise Energy Analysis.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(3),907-925. |
MLA | Fu, Shen-Ming,et al."On the Scale Interactions that Dominate the Maintenance of a Persistent Heavy Rainfall Event: A Piecewise Energy Analysis".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.3(2018):907-925. |
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