Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-20-3483-2020 |
Investigation of aerosol-cloud interactions under different absorptive aerosol regimes using Atmospheric Radiation Measurement (ARM) southern Great Plains (SGP) ground-based measurements | |
Zheng, Xiaojian1; Xi, Baike1; Dong, Xiquan1; Logan, Timothy2; Wang, Yuan3,4; Wu, Peng1 | |
2020-03-24 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:6页码:3483-3501 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The aerosol indirect effect on cloud microphysical and radiative properties is one of the largest uncertainties in climate simulations. In order to investigate the aerosol-cloud interactions, a total of 16 low-level stratus cloud cases under daytime coupled boundary-layer conditions are selected over the southern Great Plains (SGP) region of the United States. The physicochemical properties of aerosols and their impacts on cloud microphysical properties are examined using data collected from the Department of Energy Atmospheric Radiation Measurement (ARM) facility at the SGP site. The aerosol-cloud interaction index (ACI(r)) is used to quantify the aerosol impacts with respect to cloud-droplet effective radius. The mean value of ACI(r) calculated from all selected samples is 0.145 +/- 0.05 and ranges from 0.09 to 0.24 at a range of cloud liquid water paths (LWPs; LWP = 20-300 g m(-2)). The magnitude of ACI(r) decreases with an increasing LWP, which suggests a diminished cloud microphysical response to aerosol loading, presumably due to enhanced condensational growth processes and enlarged particle sizes. The impact of aerosols with different light-absorbing abilities on the sensitivity of cloud microphysical responses is also investigated. In the presence of weak light-absorbing aerosols, the low-level clouds feature a higher number concentration of cloud condensation nuclei (N-CCN) and smaller effective radii (r(e)), while the opposite is true for strong light-absorbing aerosols. Furthermore, the mean activation ratio of aerosols to CCN (N-CCN/N-a) for weakly (strongly) absorbing aerosols is 0.54 (0.45), owing to the aerosol microphysical effects, particularly the different aerosol compositions inferred by their absorptive properties. In terms of the sensitivity of cloud-droplet number concentration (N-d) to N-CCN, the fraction of CCN that converted to cloud droplets (N-d/N-CCN) for the weakly (strongly) absorptive regime is 0.69 (0.54). The measured ACI(r) values in the weakly absorptive regime are relatively higher, indicating that clouds have greater microphysical responses to aerosols, owing to the favorable thermodynamic condition. The reduced ACI(r) values in the strongly absorptive regime are due to the cloud-layer heating effect induced by strong light-absorbing aerosols. Consequently, we expect larger shortwave radiative cooling effects from clouds in the weakly absorptive regime than those in the strongly absorptive regime. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000521948300003 |
WOS关键词 | MIDLATITUDE CONTINENTAL CLOUDS ; BIOMASS BURNING SMOKE ; BOUNDARY-LAYER CLOUD ; MEGA-CITY GUANGZHOU ; OPTICAL-PROPERTIES ; CONDENSATION NUCLEI ; LONG-TERM ; WAVELENGTH DEPENDENCE ; SUBMICROMETER AEROSOL ; CHEMICAL-COMPOSITION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/278705 |
专题 | 地球科学 |
作者单位 | 1.Univ Arizona, Dept Hydrol & Atmospher Sci, Tucson, AZ 85721 USA; 2.Texas A&M Univ, Dept Atmospher Sci, College Stn, TX USA; 3.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA; 4.CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA |
推荐引用方式 GB/T 7714 | Zheng, Xiaojian,Xi, Baike,Dong, Xiquan,et al. Investigation of aerosol-cloud interactions under different absorptive aerosol regimes using Atmospheric Radiation Measurement (ARM) southern Great Plains (SGP) ground-based measurements[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(6):3483-3501. |
APA | Zheng, Xiaojian,Xi, Baike,Dong, Xiquan,Logan, Timothy,Wang, Yuan,&Wu, Peng.(2020).Investigation of aerosol-cloud interactions under different absorptive aerosol regimes using Atmospheric Radiation Measurement (ARM) southern Great Plains (SGP) ground-based measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(6),3483-3501. |
MLA | Zheng, Xiaojian,et al."Investigation of aerosol-cloud interactions under different absorptive aerosol regimes using Atmospheric Radiation Measurement (ARM) southern Great Plains (SGP) ground-based measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.6(2020):3483-3501. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论