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DOI | 10.1029/2018JD029370 |
The Interaction Between Boundary Layer and Convection Schemes in a WRF Simulation of Post Cold Frontal Clouds Over the ARM East North Atlantic Site | |
Lamraoui, Faycal1,2,3; Booth, James F.1,2; Naud, Catherine M.4; Jensen, Michael P.5; Johnson, Karen L.5 | |
2019-04-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:8页码:4699-4721 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The correct representation of low-level midlatitude clouds found in the wake of cold fronts strongly relies on the representation of planetary boundary layer (PBL) and convection processes, which are typically parameterized separately in numerical models. Using the Weather Research and Forecasting Model (WRF), this study investigates how distinct pairs of PBL and convection parameterization schemes represent cloud fraction in the post cold frontal region. The simulations focus on the region of the Department of Energy Atmospheric Radiation Measurement (ARM) Eastern North Atlantic observation site in the Azores Islands in the wake of a cold front that passed on 25 December 2015. Different PBL and convection schemes are combined to create 12 distinct configurations. The main differences between the selected physical parameterizations are the strength of vertical mixing and the entrainment. The simulations produce a wide range of cloud fractions, where some configurations significantly underestimate while others clearly overestimate satellite and surface-based estimates of cloud fraction. A skill score is used to quantitatively assess the performance of each configuration with respect to ground-based radar data. The key processes that are found to significantly impact the cloud fraction distribution are the strength of the PBL decoupling, the vertical wind shear, entrainment and detrainment rates in shallow convection, and the occurrence of drizzle. This indicates that to successfully simulate post cold frontal clouds, modeled physics must balance strong internal vertical mixing and weak exchange with the free troposphere. For this case study, cloud fraction was more sensitive to the choice of convection scheme than PBL scheme. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000469071400025 |
WOS关键词 | LIQUID WATER PATH ; VERTICAL DIFFUSION ; PART I ; CUMULUS TRANSITION ; SHALLOW-CONVECTION ; MOISTURE TRANSPORT ; SOUTHEAST PACIFIC ; MODEL ; MODIS ; PARAMETERIZATION |
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/182481 |
专题 | 气候变化 |
作者单位 | 1.CUNY, City Coll, New York, NY 10021 USA; 2.CUNY, Grad Ctr, New York, NY 10021 USA; 3.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA; 4.Columbia Univ, NASA GISS, New York, NY USA; 5.Brookhaven Natl Lab, Environm & Climate Sci Dept, Upton, NY USA |
推荐引用方式 GB/T 7714 | Lamraoui, Faycal,Booth, James F.,Naud, Catherine M.,et al. The Interaction Between Boundary Layer and Convection Schemes in a WRF Simulation of Post Cold Frontal Clouds Over the ARM East North Atlantic Site[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(8):4699-4721. |
APA | Lamraoui, Faycal,Booth, James F.,Naud, Catherine M.,Jensen, Michael P.,&Johnson, Karen L..(2019).The Interaction Between Boundary Layer and Convection Schemes in a WRF Simulation of Post Cold Frontal Clouds Over the ARM East North Atlantic Site.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(8),4699-4721. |
MLA | Lamraoui, Faycal,et al."The Interaction Between Boundary Layer and Convection Schemes in a WRF Simulation of Post Cold Frontal Clouds Over the ARM East North Atlantic Site".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.8(2019):4699-4721. |
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