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DOI | 10.1029/2019JD031868 |
Reconciling Contrasting Relationships Between Relative Dispersion and Volume-Mean Radius of Cloud Droplet Size Distributions | |
Lu, Chunsong1,2; Liu, Yangang3; Yum, Seong Soo4; Chen, Jingyi5; Zhu, Lei1,2; Gao, Sinan1,2; Yin, Yan1,2; Ha, Xingcan6; Wang, Yuan1,2 | |
2020-05-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2020 |
卷号 | 125期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; South Korea |
英文摘要 | Cloud droplet spectral relative dispersion is critical to parameterizations of cloud radiative properties, warm-rain initiation, and aerosol-cloud interactions in models; however, there is no consistent relationship between relative dispersion and volume-mean radius in literature, which hinders improving relative dispersion parameterization and calls for physical explanation. Here we show, by analyzing aircraft observations of cumulus clouds during Routine AAF [Atmospheric Radiation Measurement (ARM) Aerial Facility] Clouds with Low Optical Water Depths (CLOWD) Optical Radiative Observations, that the correlation between relative dispersion and volume-mean radius changes from positive to negative as volume-mean radius increases. With the new observation, we postulate that the sign of the correlation is determined by whether or not condensation (evaporation) occurs simultaneously with significant new activation (deactivation). The hypothesis is validated by simulations of both an adiabatic cloud parcel model and a parcel model accounting for entrainment-mixing. A new quantity, first bin strength, is introduced to quantify this new observation. Theoretical analysis of truncated gamma and modified gamma size distributions further supports the hypothesis and reconciles the contrasting relationships between relative dispersion and volume-mean radius, including the results in polluted fog observations. The results could shed new light on the so-called "twilight zone" between cloudy and cloud-free air, which in turn affects evaluation of aerosol-cloud interactions and retrieval of aerosol optical depth. |
英文关键词 | Cloud Microphysics Relative Dispersion Volume-Mean Radius |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000536605500004 |
WOS关键词 | BOUNDARY-LAYER CLOUDS ; SPECTRAL DISPERSION ; MICROPHYSICAL RELATIONSHIPS ; STOCHASTIC CONDENSATION ; AIRCRAFT OBSERVATIONS ; AEROSOL ; ENTRAINMENT ; PARAMETERIZATIONS ; SENSITIVITY ; SPECTROMETER |
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/280214 |
专题 | 气候变化 |
作者单位 | 1.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, China Meteorol Adm, Nanjing, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Key Lab Aerosol Cloud Precipitat, China Meteorol Adm, Nanjing, Peoples R China; 3.Brookhaven Natl Lab, Environm & Climate Sci Dept, Upton, NY 11973 USA; 4.Yonsei Univ, Dept Atmospher Sci, Seoul, South Korea; 5.Pacific Northwest Natl Lab, Richland, WA 99352 USA; 6.China Meteorol Adm, Inst Urban Meteorol, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Lu, Chunsong,Liu, Yangang,Yum, Seong Soo,et al. Reconciling Contrasting Relationships Between Relative Dispersion and Volume-Mean Radius of Cloud Droplet Size Distributions[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(9). |
APA | Lu, Chunsong.,Liu, Yangang.,Yum, Seong Soo.,Chen, Jingyi.,Zhu, Lei.,...&Wang, Yuan.(2020).Reconciling Contrasting Relationships Between Relative Dispersion and Volume-Mean Radius of Cloud Droplet Size Distributions.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(9). |
MLA | Lu, Chunsong,et al."Reconciling Contrasting Relationships Between Relative Dispersion and Volume-Mean Radius of Cloud Droplet Size Distributions".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.9(2020). |
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