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| DOI | 10.1016/j.atmosres.2020.105104 |
| Role of droplet size classes on the cloud droplet spectral dispersion as observed over the Western Ghats | |
| Ansari K.; Pandithurai G.; Anil Kumar V. | |
| 发表日期 | 2020 |
| ISSN | 0169-8095 |
| 卷号 | 246 |
| 英文摘要 | The aerosol indirect effects (AIE) on cloud microphysical properties have been studied using ground-based in-situ measurements. Aerosol and cloud microphysical properties were collected from a high altitude site in the Western Ghats region of India, where clouds pass over the surface during South West monsoon. The AIE was estimated using cloud droplet number concentration (AIEn) and cloud droplet effective radius (AIEs) at different fixed liquid water content (LWC) bins. The AIE varied in the range 0.01–0.13 for LWC between 0.04 g m−3 and 0.26 g m−3. The maximum AIEn and AIEs (0.125 and 0.119) were observed at the lower LWC bin (0.06–0.07 g m−3). An overestimation in AIEn is due to the dispersion effect. The offset was reduced and AIEn became close to AIEs after dispersion correction. Hence for the correct estimation of AIE using cloud droplet number concentration (Nc), dispersion correction should be considered. At the same time, the AIE estimate obtained using Reff does not need correction as the dispersion effect is implicitly included. Relative dispersion can be viewed not only as the combined effects of σ and Rm, but also as the combined effects of cloud droplets of different sizes. Further, for the first time in India, the relative contribution by the smaller and medium size droplets to the total dispersion of cloud droplet size distribution (CDSD) at lower and higher LWC bins were studied. In lower LWC, the smaller size droplets are contributing maximum (71%) to the total Nc, whereas the medium size droplets are contributing maximum (61%) to the total dispersion. At higher LWC, the contribution to total Nc by the smaller size droplets was reduced by 20%, however contribution by the medium size droplets increased by 17%, compared to the lower LWC case. Hence at higher LWC, both smaller (42%) and medium (55%) size droplets have a significant role in the total dispersion of CDSD. © 2020 Elsevier B.V. |
| 关键词 | AerosolsAerosol indirect effectCloud droplet number concentrationsCloud microphysical propertiesDispersion correctionLiquid water contentRelative contributionRelative dispersionSpectral dispersionsDropsaerosolcloud dropletcloud microphysicsdispersionground-based measurementin situ measurementwater contentIndiaWestern Ghats |
| 语种 | 英语 |
| 来源机构 | Atmospheric Research |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/132348 |
| 推荐引用方式 GB/T 7714 | Ansari K.,Pandithurai G.,Anil Kumar V.. Role of droplet size classes on the cloud droplet spectral dispersion as observed over the Western Ghats[J]. Atmospheric Research,2020,246. |
| APA | Ansari K.,Pandithurai G.,&Anil Kumar V..(2020).Role of droplet size classes on the cloud droplet spectral dispersion as observed over the Western Ghats.,246. |
| MLA | Ansari K.,et al."Role of droplet size classes on the cloud droplet spectral dispersion as observed over the Western Ghats".246(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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