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DOI | 10.1175/JAS-D-19-0261.1 |
Surface Solar Irradiance in Continental Shallow Cumulus Fields: Observations and Large-Eddy Simulation | |
Gristey, Jake J.1,2; Feingold, Graham2; Glenn, Ian B.1,2; Schmidt, K. Sebastian3; Chen, Hong3 | |
2020-03-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2020 |
卷号 | 77期号:3页码:1065-1080 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | This study examines shallow cumulus cloud fields and their surface shortwave radiative effects using large-eddy simulation (LES) along with observations across multiple days at the Atmospheric Radiation Measurement Southern Great Plains atmospheric observatory. Pronounced differences are found between probability density functions (PDFs) of downwelling surface solar irradiance derived from observations and LES one-dimensional (1D) online radiation calculations. The shape of the observed PDF is bimodal, which is only reproduced by offline three-dimensional (3D) radiative transfer calculations, demonstrating PDF bimodality as a 3D radiative signature of continental shallow cumuli. Local differences between 3D and 1D radiative transfer calculations of downwelling surface solar irradiance are, on average, larger than 150 W m(-2) on one afternoon. The differences are substantially reduced when spatially averaged over the LES domain and temporally averaged over the diurnal cycle, but systematic 3D biases ranging from 2 to 8 W m(-2) persist across different days. Covariations between the domain-averaged surface irradiance, framed as a surface cloud radiative effect, and the simulated cloud fraction are found to follow a consistent diurnal relationship, often exhibiting hysteresis. In contrast, observations show highly variable behavior. By subsampling the LES domain, it is shown that this is due to the limited sampling density of inherently 3D observations. These findings help to define observational requirements for detecting such relationships, provide valuable insight for evaluating weather and climate models against surface observations as they push to ever higher resolutions, and have important implications for future assessments of solar renewable energy potential. |
英文关键词 | Cloud radiative effects Cumulus clouds Shortwave radiation Sampling Surface observations Large eddy simulations |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000526717000003 |
WOS关键词 | 3-DIMENSIONAL RADIATIVE-TRANSFER ; CLOUD FRACTION ; PHOTON TRANSPORT ; LONG-TERM ; MODEL ; ALBEDO ; LAND ; HETEROGENEITIES ; VARIABILITY ; RESOLUTION |
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/280292 |
专题 | 地球科学 |
作者单位 | 1.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 2.NOAA, Chem Sci Div, Earth Syst Res Lab, Boulder, CO 80305 USA; 3.Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Gristey, Jake J.,Feingold, Graham,Glenn, Ian B.,et al. Surface Solar Irradiance in Continental Shallow Cumulus Fields: Observations and Large-Eddy Simulation[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2020,77(3):1065-1080. |
APA | Gristey, Jake J.,Feingold, Graham,Glenn, Ian B.,Schmidt, K. Sebastian,&Chen, Hong.(2020).Surface Solar Irradiance in Continental Shallow Cumulus Fields: Observations and Large-Eddy Simulation.JOURNAL OF THE ATMOSPHERIC SCIENCES,77(3),1065-1080. |
MLA | Gristey, Jake J.,et al."Surface Solar Irradiance in Continental Shallow Cumulus Fields: Observations and Large-Eddy Simulation".JOURNAL OF THE ATMOSPHERIC SCIENCES 77.3(2020):1065-1080. |
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