Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0314.1 |
Dynamics of Cloud-Top Generating Cells in Winter Cyclones. Part III: Shear and Convective Organization | |
Keeler, Jason M.1; Rauber, Robert M.2; Jewett, Brian F.2; Mcfarquhar, Greg M.2; Rasmussen, Roy M.3; Xue, Lulin3; Liu, Changhai3; Thompson, Gregory3 | |
2017-09-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
![]() |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Cloud-top generating cells (GCs) are a common feature atop stratiform clouds within the comma head of winter cyclones. The dynamics of cloud-top GCs are investigated using very high-resolution idealized WRF Model simulations to examine the role of shear in modulating the structure and intensity of GCs. Simulations were run for the same combinations of radiative forcing and instability as in Part II of this series, but with six different shear profiles ranging from 0 to 10 ms(-1) km(-1) within the layer encompassing the GCs. The primary role of shear was to modulate the organization of GCs, which organized as closed convective cells in simulations with radiative forcing and no shear. In simulations with shear and radiative forcing, GCs organized in linear streets parallel to the wind. No GCs developed in the initially stable simulations with no radiative forcing. In the initially unstable and neutral simulations with no radiative forcing or shear, GCs were exceptionally weak, with no clear organization. In moderate-shear (Delta u/Delta z = 2, 4 ms(-1) km(-1)) simulations with no radiative forcing, linear organization of the weak cells was apparent, but this organization was less coherent in simulations with high shear (Delta u/Delta z = 6, 8, 10 ms(-1) km(-1)). The intensity of the updrafts was primarily related to the mode of radiative forcing but was modulated by shear. The more intense GCs in nighttime simulations were either associated with no shear (closed convective cells) or strong shear (linear streets). Updrafts within GCs under conditions with radiative forcing were typically similar to 1-2 ms(-1) with maximum values < 4 ms(-1). |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409847100009 |
WOS关键词 | COMMA HEAD REGION ; PLANE COUETTE FLOW ; RADAR OBSERVATIONS ; MICROPHYSICAL PROPERTIES ; SNOW GENERATION ; BOUNDARY-LAYER ; DOPPLER RADAR ; PRECIPITATION ; STABILITY ; STRATOCUMULUS |
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/29609 |
专题 | 地球科学 |
作者单位 | 1.Univ Nebraska Lincoln, Dept Earth & Atmospher Sci, Lincoln, NE 68588 USA; 2.Univ Illinois, Dept Atmospher Sci, Urbana, IL USA; 3.Natl Ctr Atmospher Res, Res Applicat Lab, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Keeler, Jason M.,Rauber, Robert M.,Jewett, Brian F.,et al. Dynamics of Cloud-Top Generating Cells in Winter Cyclones. Part III: Shear and Convective Organization[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(9). |
APA | Keeler, Jason M..,Rauber, Robert M..,Jewett, Brian F..,Mcfarquhar, Greg M..,Rasmussen, Roy M..,...&Thompson, Gregory.(2017).Dynamics of Cloud-Top Generating Cells in Winter Cyclones. Part III: Shear and Convective Organization.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(9). |
MLA | Keeler, Jason M.,et al."Dynamics of Cloud-Top Generating Cells in Winter Cyclones. Part III: Shear and Convective Organization".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.9(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论