Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0333.1 |
A 1D Theoretical Analysis of Northerly Low-Level Jets over the Great Plains | |
Gebauer, Joshua G.1,2; Fedorovich, Evgeni1; Shapiro, Alan1,3 | |
2017-10-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The forcing of northerly low-level jets over the eastward-sloped terrain of the U.S. Great Plains was studied using a one-dimensional (1D) nonstationary analytical model based on the Boussinesq-approximated equations of motion and thermal energy. For northerly low-level jets, the forcing from diurnal changes in surface heating of the sloped terrain (Holton mechanism) is out of phase with the nocturnal inertial oscillation resulting from the cessation of turbulent mixing at sunset (Blackadar mechanism), which results in weaker northerly nocturnal low-level jets when compared to southerly nocturnal low-levels jets with the same-magnitude background pressure gradient forcing. Because of the Blackadar and Holton mechanisms acting out of phase, nocturnal northerly low-level jets cannot solely explain the northerly low-level jet maximum over the Great Plains found in climatological studies. It is shown that negative buoyancy values over the eastward-sloped terrain enhance the low-level northerly geostrophic wind, which can cause low-level jetlike wind profiles that do not necessarily depend on the diurnal cycle. However, nocturnal northerly low-level jets primarily caused by an inertial oscillation still occur when daytime mixing is strong and buoyancy is small at sunset. These conditions are possible when strong capping inversions are present in the daytime convective boundary layer. The occurrence of both types of northerly low-level jets, those caused by negative buoyancy values over the sloped terrain and those driven by an inertial oscillation, better explains the findings of previous low-level jet climatologies. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417993900006 |
WOS关键词 | ATMOSPHERIC BOUNDARY-LAYER ; WIND ENERGY ; URBAN OZONE ; CLIMATOLOGY ; TRANSPORT ; OSCILLATION ; EPISODE ; STREAKS ; COMPLEX ; MODEL |
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/29365 |
专题 | 地球科学 |
作者单位 | 1.Univ Oklahoma, Sch Meteorol, Norman, OK 73019 USA; 2.Univ Oklahoma, Cooperat Inst Mesoscale Meteorol Studies, Norman, OK 73019 USA; 3.Univ Oklahoma, Ctr Anal & Predict Storms, Norman, OK 73019 USA |
推荐引用方式 GB/T 7714 | Gebauer, Joshua G.,Fedorovich, Evgeni,Shapiro, Alan. A 1D Theoretical Analysis of Northerly Low-Level Jets over the Great Plains[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(10). |
APA | Gebauer, Joshua G.,Fedorovich, Evgeni,&Shapiro, Alan.(2017).A 1D Theoretical Analysis of Northerly Low-Level Jets over the Great Plains.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(10). |
MLA | Gebauer, Joshua G.,et al."A 1D Theoretical Analysis of Northerly Low-Level Jets over the Great Plains".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.10(2017). |
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