GSTDTAP  > 地球科学
DOI10.1175/JAS-D-18-0155.1
Estimation of the Variability of Mesoscale Energy Spectra with Three Years of COSMO-DE Analyses
Selz, Tobias; Bierdel, Lotte; Craig, George C.
2019-02-01
发表期刊JOURNAL OF THE ATMOSPHERIC SCIENCES
ISSN0022-4928
EISSN1520-0469
出版年2019
卷号76期号:2页码:627-637
文章类型Article
语种英语
国家Germany
英文摘要

Research on the mesoscale kinetic energy spectrum over the past few decades has focused on finding a dynamical mechanism that gives rise to a universal spectral slope. Here we investigate the variability of the spectrum using 3 years of kilometer-resolution analyses from COSMO configured for Germany (COSMO-DE). It is shown that the mesoscale kinetic energy spectrum is highly variable in time but that a minimum in variability is found on scales around 100 km. The high variability found on the small-scale end of the spectrum (around 10 km) is positively correlated with the precipitation rate where convection is a strong source of variance. On the other hand, variability on the large-scale end (around 1000 km) is correlated with the potential vorticity, as expected for geostrophically balanced flows. Accordingly, precipitation at small scales is more highly correlated with divergent kinetic energy, and potential vorticity at large scales is more highly correlated with rotational kinetic energy. The presented findings suggest that the spectral slope and amplitude on the mesoscale range are governed by an ever-changing combination of the upscale and downscale impacts of these large- and small-scale dynamical processes rather than by a universal, intrinsically mesoscale dynamical mechanism.


英文关键词Kinetic energy Mesoscale processes Cloud resolving models
领域地球科学
收录类别SCI-E
WOS记录号WOS:000459067400001
WOS关键词UPSCALE ERROR GROWTH ; WAVE-NUMBER SPECTRA ; STRATIFIED TURBULENCE ; PREDICTABILITY ; TEMPERATURE ; CASCADE ; DECOMPOSITION ; ATMOSPHERE ; WIND
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/29776
专题地球科学
作者单位Ludwig Maximilians Univ Munchen, Meteorol Inst, Munich, Germany
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Selz, Tobias,Bierdel, Lotte,Craig, George C.. Estimation of the Variability of Mesoscale Energy Spectra with Three Years of COSMO-DE Analyses[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(2):627-637.
APA Selz, Tobias,Bierdel, Lotte,&Craig, George C..(2019).Estimation of the Variability of Mesoscale Energy Spectra with Three Years of COSMO-DE Analyses.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(2),627-637.
MLA Selz, Tobias,et al."Estimation of the Variability of Mesoscale Energy Spectra with Three Years of COSMO-DE Analyses".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.2(2019):627-637.
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