Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0261.1 |
Climatological Features of the Weakly and Very Stably Stratified Nocturnal Boundary Layers. Part I: State Variables Containing Information about Regime Occupation | |
Abraham, Carsten; Monahan, Adam H. | |
2019-11-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:11页码:3455-3484 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | The atmospheric nocturnal stable boundary layer (SBL) can be classified into two distinct regimes: the weakly SBL (wSBL) with sustained turbulence and the very SBL (vSBL) with weak and intermittent turbulence. A hidden Markov model (HMM) analysis of the three-dimensional state-variable space of Reynolds-averaged mean dry static stability, mean wind speed, and wind speed shear is used to classify the SBL into these two regimes at nine different tower sites, in order to study long-term regime occupation and transition statistics. Both Reynolds-averaged mean data and measures of turbulence intensity (eddy variances) are separated in a physically meaningful way. In particular, fluctuations of the vertical wind component are found to be much smaller in the vSBL than in the wSBL. HMM analyses of these data using more than two SBL regimes do not result in robust results across measurement locations. To identify which meteorological state variables carry the information about regime occupation, the HMM analyses are repeated using different state-variable subsets. Reynolds-averaged measures of turbulence intensity (such as turbulence kinetic energy) at any observed altitude hold almost the same information as the original set, without adding any additional information. In contrast, both stratification and shear depend on surface information to capture regime transitions accurately. Use of information only in the bottom 10 m of the atmosphere is sufficient for HMM analyses to capture important information about regime occupation and transition statistics. It follows that the commonly measured 10-m wind speed is potentially a good indicator of regime occupation. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000494454100001 |
WOS关键词 | PROBABILITY-DISTRIBUTION ; WIND-SPEED ; INTERMITTENT TURBULENCE ; DOME C ; SIMILARITY THEORY ; DIURNAL CYCLES ; CLEAR-SKY ; MODELS ; LEVEL ; SHEAR |
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/225991 |
专题 | 环境与发展全球科技态势 |
作者单位 | Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC, Canada |
推荐引用方式 GB/T 7714 | Abraham, Carsten,Monahan, Adam H.. Climatological Features of the Weakly and Very Stably Stratified Nocturnal Boundary Layers. Part I: State Variables Containing Information about Regime Occupation[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(11):3455-3484. |
APA | Abraham, Carsten,&Monahan, Adam H..(2019).Climatological Features of the Weakly and Very Stably Stratified Nocturnal Boundary Layers. Part I: State Variables Containing Information about Regime Occupation.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(11),3455-3484. |
MLA | Abraham, Carsten,et al."Climatological Features of the Weakly and Very Stably Stratified Nocturnal Boundary Layers. Part I: State Variables Containing Information about Regime Occupation".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.11(2019):3455-3484. |
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