Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025896 |
Sensitivity of US summer precipitation to model resolution and convective parameterizations across gray zone resolutions | |
Gao, Yang1,2; Leung, L. Ruby1; Zhao, Chun1; Hagos, Samson1 | |
2017-03-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | Simulating summer precipitation is a significant challenge for climate models that rely on cumulus parameterizations to represent moist convection processes. Motivated by recent advances in computing that support very high-resolution modeling, this study aims to systematically evaluate the effects of model resolution and convective parameterizations across the gray zone resolutions. Simulations using the Weather Research and Forecasting model were conducted at grid spacings of 36 km, 12 km, and 4 km for two summers over the conterminous U.S. The convection-permitting simulations at 4 km grid spacing are most skillful in reproducing the observed precipitation spatial distributions and diurnal variability. Notable differences are found between simulations with the traditional Kain-Fritsch (KF) and the scale-aware Grell-Freitas (GF) convection schemes, with the latter more skillful in capturing the nocturnal timing in the Great Plains and North American monsoon regions. The GF scheme also simulates a smoother transition from convective to large-scale precipitation as resolution increases, resulting in reduced sensitivity to model resolution compared to the KF scheme. Nonhydrostatic dynamics has a positive impact on precipitation over complex terrain even at 12 km and 36 km grid spacings. With nudging of the winds toward observations, we show that the conspicuous warm biases in the Southern Great Plains are related to precipitation biases induced by large-scale circulation biases, which are insensitive to model resolution. Overall, notable improvements in simulating summer rainfall and its diurnal variability through convection-permitting modeling and scale-aware parameterizations suggest promising venues for improving climate simulations of water cycle processes. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398064200012 |
WOS关键词 | WARM-SEASON PRECIPITATION ; DIURNAL CYCLE ; CLIMATE SIMULATIONS ; PART I ; CUMULUS CONVECTION ; DATA ASSIMILATION ; RAINFALL ; IMPACT ; IMPLEMENTATION ; ENSEMBLE |
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/32038 |
专题 | 气候变化 |
作者单位 | 1.Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99354 USA; 2.Ocean Univ China, Coll Environm Sci & Engn, Qingdao, Peoples R China |
推荐引用方式 GB/T 7714 | Gao, Yang,Leung, L. Ruby,Zhao, Chun,et al. Sensitivity of US summer precipitation to model resolution and convective parameterizations across gray zone resolutions[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(5). |
APA | Gao, Yang,Leung, L. Ruby,Zhao, Chun,&Hagos, Samson.(2017).Sensitivity of US summer precipitation to model resolution and convective parameterizations across gray zone resolutions.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(5). |
MLA | Gao, Yang,et al."Sensitivity of US summer precipitation to model resolution and convective parameterizations across gray zone resolutions".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.5(2017). |
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