Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0362.1 |
Mode-Decomposed Equation Diagnosis for Atmospheric Blocking Development | |
Aikawa, Takuya1; Inatsu, Masaru2,3,4; Nakano, Naoto5; Iwano, Tetsuya6 | |
2019-10-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:10页码:3151-3167 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | This paper proposes a new method to identify atmospheric blocking development without the time filtering used in previous studies. A mode-decomposed vorticity equation is formulated from the principal components (PCs) of 500-hPa geopotential height by applying a new idea; the orthonormality of PCs allows any variable to be decomposed into a projection corresponding to the PCs. To test this, sectorial blocking episodes in Northern Hemisphere winter were identified by Barriopedro's method. A blocking index was defined for each longitudinal range as the linear combination of the 10 largest PCs by means of the composite for the blocking episodes. Blocking development was diagnosed, in terms of the low modes of PC1-PC10 and the high modes of PC11-PC50. The results suggest that the intensification of blocking over the North Pacific and Eurasia is associated with nonlinear interaction among high modes, whereas the intensification (decay) of North Atlantic blocks is related mainly to enhanced nonlinear interaction among low-frequency (high-frequency) eddies. This main result is insensitive to the choice of definition for blocks and the choice of the mode separation boundary. |
英文关键词 | Blocking Dynamics |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000487802800002 |
WOS关键词 | LOW-FREQUENCY VARIABILITY ; LOW-DIMENSIONAL PROBLEM ; PART I ; NON-GAUSSIANITY ; PLANETARY ; VORTICITY ; FLOW ; DYNAMICS ; EDDIES ; ANTICYCLONES |
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/187468 |
专题 | 地球科学 |
作者单位 | 1.Japan Meteorol Agcy, Tokyo, Japan; 2.Hokkaido Univ, Fac Sci, Sapporo, Hokkaido, Japan; 3.Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido, Japan; 4.Hokkaido Univ, Ctr Nat Hazards Res, Sapporo, Hokkaido, Japan; 5.Kyoto Univ, Inst Liberal Arts & Sci, Kyoto, Japan; 6.Hokkaido Univ, Grad Sch Sci, Sapporo, Hokkaido, Japan |
推荐引用方式 GB/T 7714 | Aikawa, Takuya,Inatsu, Masaru,Nakano, Naoto,et al. Mode-Decomposed Equation Diagnosis for Atmospheric Blocking Development[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(10):3151-3167. |
APA | Aikawa, Takuya,Inatsu, Masaru,Nakano, Naoto,&Iwano, Tetsuya.(2019).Mode-Decomposed Equation Diagnosis for Atmospheric Blocking Development.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(10),3151-3167. |
MLA | Aikawa, Takuya,et al."Mode-Decomposed Equation Diagnosis for Atmospheric Blocking Development".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.10(2019):3151-3167. |
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