Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0336.1 |
The Subtropical Stratocumulus-Topped Planetary Boundary Layer: A Climatology and the Lagrangian Evolution | |
Eastman, Ryan; Wood, Robert; Ting, Kuan O. | |
2017-08-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Prior work has shown that deeper planetary boundary layers (PBLs) are associated with cloud breakup and reduced droplet concentration in subtropical stratocumulus cloud decks, motivating a need for a thorough understanding of PBL mechanics. Here, 169 000 boundary layer trajectories are calculated in four eastern subtropical ocean basins following reanalysis winds at 925 mb (1 mb = 1 hPa). These trajectories combined with a twice-daily cloud-top-height-inferred PBL depth product allow for a comprehensive Lagrangian analysis of the stratocumulus (Sc)-topped PBL as the cloud deck transitions from Sc to trade cumulus (Cu). Month-to-month variations of this PBL product are strongly positively correlated with an independent PBL product derived from GPS radio occultation. A climatology shows the PBL deepening offshore in every region. The yearly cycle of PBL depth varies in opposition to the yearly cycle of lower-tropospheric stability (LTS), but high-frequency variation between LTS and PBL depth is more complex. Observed geographical patterns of Lagrangian PBL deepening rates appear nonuniform between and within study regions, with smaller regions of maximum deepening rates. A Lagrangian analysis suggests that many variables act to alter the PBL: increased sea surface temperature and droplet concentration act to deepen the PBL, while increases in upper-level humidity, LTS, precipitation, upper-level temperature, and subsidence lead to PBL shallowing. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409133100012 |
WOS关键词 | LARGE-EDDY SIMULATIONS ; A-TRAIN SATELLITES ; SURFACE OBSERVATIONS ; CUMULUS TRANSITIONS ; CLOUD EVOLUTION ; VOCALS-REX ; MODELS ; DEPTH ; MODIS ; PRECIPITATION |
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/29610 |
专题 | 地球科学 |
作者单位 | Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Eastman, Ryan,Wood, Robert,Ting, Kuan O.. The Subtropical Stratocumulus-Topped Planetary Boundary Layer: A Climatology and the Lagrangian Evolution[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(8). |
APA | Eastman, Ryan,Wood, Robert,&Ting, Kuan O..(2017).The Subtropical Stratocumulus-Topped Planetary Boundary Layer: A Climatology and the Lagrangian Evolution.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(8). |
MLA | Eastman, Ryan,et al."The Subtropical Stratocumulus-Topped Planetary Boundary Layer: A Climatology and the Lagrangian Evolution".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.8(2017). |
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