Climate Change Data Portal
| DOI | 10.1016/j.atmosenv.2021.118525 |
| Vertical profile of atmospheric single scattering properties and assessment of the effects of temporal variability of cloud water content over Yaounde | |
| Akana Nguimdo L. | |
| 发表日期 | 2021 |
| ISSN | 1352-2310 |
| 卷号 | 261 |
| 英文摘要 | This study discusses a method for deriving the vertical profiles of absorption and scattering coefficients in integrated atmospheric column for radiative models. It then presents these profiles in the case of cloudy layers using details of the distributions of cloud water content and the vertical description of other radiatively active atmospheric species in the shortwave spectrum for Yaounde (11°51′ E, 3°86′ N). It was shown that both quantities globally exhibit spatial and temporal variabilities and therefore should be used with caution in radiative transfer calculations. The proposed method duly incorporates these variabilities using existing knowledge on atmospheric optics and radiative constituents (gas, clouds and aerosols) for appropriate representation of the actual state of the atmosphere. The case study combines data of cloud water content and effective radius as described by Akana and Njomo (2010b) as well as HITRAM vertical profile for gas (Rothman et al., 2010) and aerosols vertical properties as proposed by Kneizys et al. (1996). From the present analysis, it was observed that the highest values obtained near the surface were followed by a decrease in altitude. The minima are obtained slightly above the mixed-phase cloud layer. The scattering coefficient close to the surface is globally smaller than the absorption coefficient but this tendency is reversed at mid-altitude in the mixed-phase cloud layer generally between 500 and 600 mbar. The single scattering albedo (SSA) deduced from these column-integrated profiles show very small values near the surface and gradual increase towards high altitudes with the smallest value (less than 0.15) found during rainy season. This increase is rapid in mixed-phase cloud where it reaches 0.79 at the upper limits. Assessing the impact of gases and aerosol on these profiles, it was observed that SSA increase by 153% in gas-free atmosphere while a drop of 3% was noticed in aerosol-free atmosphere close to the surface. © 2021 Elsevier Ltd |
| 关键词 | AbsorptionCloud phaseCloud water contentShortwaveSingle scattering albedo |
| 语种 | 英语 |
| scopus关键词 | Solar radiation; Water absorption; Absorption co-efficient; Cloud layers; Cloud phase; Cloud water; Cloud water content; Mixed-phase cloud; Scattering co-efficient; Shortwave; Single scattering albedo; Vertical profile; Aerosols; absorption coefficient; aerosol property; albedo; assessment method; atmospheric modeling; cloud water; column; mixed layer; radiative transfer; scattering; spectrum; temporal variation; vertical profile; water content; aerosol; albedo; altitude; article; atmosphere; calculation; gas; optics; rainy season; water content; Cameroon; Centre [Cameroon]; Yaounde |
| 来源期刊 | ATMOSPHERIC ENVIRONMENT
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/248327 |
| 作者单位 | Faculty of Engineering and Technology (FET/EE), University of Buea, P.O. Box 63 Buea, Cameroon |
| 推荐引用方式 GB/T 7714 | Akana Nguimdo L.. Vertical profile of atmospheric single scattering properties and assessment of the effects of temporal variability of cloud water content over Yaounde[J],2021,261. |
| APA | Akana Nguimdo L..(2021).Vertical profile of atmospheric single scattering properties and assessment of the effects of temporal variability of cloud water content over Yaounde.ATMOSPHERIC ENVIRONMENT,261. |
| MLA | Akana Nguimdo L.."Vertical profile of atmospheric single scattering properties and assessment of the effects of temporal variability of cloud water content over Yaounde".ATMOSPHERIC ENVIRONMENT 261(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [Akana Nguimdo L.]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Akana Nguimdo L.]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Akana Nguimdo L.]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
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。
