Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD026326 |
Effects of environment forcing on marine boundary layer cloud-drizzle processes | |
Wu, Peng1; Dong, Xiquan1; Xi, Baike2; Liu, Yangang3; Thieman, Mandana4; Minnis, Patrick5 | |
2017-04-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Determining the factors affecting drizzle formation in marine boundary layer (MBL) clouds remains a challenge for both observation and modeling communities. To investigate the roles of vertical wind shear and buoyancy (static instability) in drizzle formation, ground-based observations from the Atmospheric Radiation Measurement Program at the Azores are analyzed for two types of conditions. The type I clouds should last for at least 5h and more than 90% time must be nondrizzling and then followed by at least 2h of drizzling periods, while the type II clouds are characterized by mesoscale convection cellular structures with drizzle occur every 2 to 4h. By analyzing the boundary layer wind profiles (direction and speed), it was found that either directional or speed shear is required to promote drizzle production in the type I clouds. Observations and a recent model study both suggest that vertical wind shear helps the production of turbulent kinetic energy (TKE), stimulates turbulence within cloud layer, and enhances drizzle formation near the cloud top. The type II clouds do not require strong wind shear to produce drizzle. The small values of lower tropospheric stability (LTS) and negative Richardson number (R-i) in the type II cases suggest that boundary layer instability plays an important role in TKE production and cloud-drizzle processes. By analyzing the relationships between LTS and wind shear for all cases and all time periods, a stronger connection was found between LTS and wind directional shear than that between LTS and wind speed shear. |
英文关键词 | drizzle formation vertical wind shear boundary layer static instability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000401180800019 |
WOS关键词 | DROPLET SIZE DISTRIBUTIONS ; GROUND-BASED MEASUREMENTS ; LARGE-EDDY SIMULATIONS ; ARM MOBILE FACILITY ; STRATOCUMULUS CLOUDS ; STRATIFORM CLOUDS ; PART II ; AUTOCONVERSION PROCESS ; CONDENSATION NUCLEI ; RADIATION BUDGET |
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/34384 |
专题 | 气候变化 |
作者单位 | 1.Univ Arizona, Dept Hydrol & Atmospher Sci, Tucson, AZ 85721 USA; 2.Univ North Dakota, Dept Atmospher Sci, Grand Forks, ND USA; 3.Brookhaven Natl Lab, Upton, NY 11973 USA; 4.Sci Syst & Applicat Inc, Hampton, VA USA; 5.NASA, Langley Res Ctr, Hampton, VA 23665 USA |
推荐引用方式 GB/T 7714 | Wu, Peng,Dong, Xiquan,Xi, Baike,et al. Effects of environment forcing on marine boundary layer cloud-drizzle processes[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(8). |
APA | Wu, Peng,Dong, Xiquan,Xi, Baike,Liu, Yangang,Thieman, Mandana,&Minnis, Patrick.(2017).Effects of environment forcing on marine boundary layer cloud-drizzle processes.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(8). |
MLA | Wu, Peng,et al."Effects of environment forcing on marine boundary layer cloud-drizzle processes".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.8(2017). |
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