Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-017-3712-z |
Simulated precipitation diurnal cycles over East Asia using different CAPE-based convective closure schemes in WRF model | |
Yang, Ben1,2; Zhou, Yang1,2; Zhang, Yaocun1,2; Huang, Anning1,2; Qian, Yun3; Zhang, Lujun1,2 | |
2018-03-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:1639-1658 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Closure assumption in convection parameterization is critical for reasonably modeling the precipitation diurnal variation in climate models. This study evaluates the precipitation diurnal cycles over East Asia during the summer of 2008 simulated with three convective available potential energy (CAPE) based closure assumptions, i.e. CAPE-relaxing (CR), quasi-equilibrium (QE), and free-troposphere QE (FTQE) and investigates the impacts of planetary boundary layer (PBL) mixing, advection, and radiation on the simulation by using the weather research and forecasting model. The sensitivity of precipitation diurnal cycle to PBL vertical resolution is also examined. Results show that the precipitation diurnal cycles simulated with different closures all exhibit large biases over land and the simulation with FTQE closure agrees best with observation. In the simulation with QE closure, the intensified PBL mixing after sunrise is responsible for the late-morning peak of convective precipitation, while in the simulation with FTQE closure, convective precipitation is mainly controlled by advection cooling. The relative contributions of different processes to precipitation formation are functions of rainfall intensity. In the simulation with CR closure, the dynamical equilibrium in the free troposphere still can be reached, implying the complex cause-effect relationship between atmospheric motion and convection. For simulations in which total CAPE is consumed for the closures, daytime precipitation decreases with increased PBL resolution because thinner model layer produces lower convection starting layer, leading to stronger downdraft cooling and CAPE consumption. The sensitivity of the diurnal peak time of precipitation to closure assumption can also be modulated by changes in PBL vertical resolution. The results of this study help us better understand the impacts of various processes on the precipitation diurnal cycle simulation. |
英文关键词 | Precipitation diurnal cycle simulation Convective closure Boundary-layer resolution East Asia WRF model |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426707100010 |
WOS关键词 | SUMMER MONSOON PRECIPITATION ; COMMUNITY ATMOSPHERE MODEL ; REGIONAL CLIMATE MODEL ; CUMULUS PARAMETERIZATION ; SYSTEM MODEL ; UNCERTAINTY QUANTIFICATION ; PART I ; IMPACT ; CHINA ; SENSITIVITY |
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/36248 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ, Inst Climate & Global Change Res, Sch Atmospher Sci, CMA NJU Joint Lab Climate Predict Studies, Nanjing, Jiangsu, Peoples R China; 2.Collaborat Innovat Ctr Climate Change, Nanjing, Jiangsu, Peoples R China; 3.Pacific Northwest Natl Lab, Richland, WA USA |
推荐引用方式 GB/T 7714 | Yang, Ben,Zhou, Yang,Zhang, Yaocun,et al. Simulated precipitation diurnal cycles over East Asia using different CAPE-based convective closure schemes in WRF model[J]. CLIMATE DYNAMICS,2018,50:1639-1658. |
APA | Yang, Ben,Zhou, Yang,Zhang, Yaocun,Huang, Anning,Qian, Yun,&Zhang, Lujun.(2018).Simulated precipitation diurnal cycles over East Asia using different CAPE-based convective closure schemes in WRF model.CLIMATE DYNAMICS,50,1639-1658. |
MLA | Yang, Ben,et al."Simulated precipitation diurnal cycles over East Asia using different CAPE-based convective closure schemes in WRF model".CLIMATE DYNAMICS 50(2018):1639-1658. |
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