Climate Change Data Portal
| DOI | 10.5194/acp-24-745-2024 |
| Wind-driven emissions of coarse-mode particles in an urban environment | |
| 发表日期 | 2024 |
| ISSN | 1680-7316 |
| EISSN | 1680-7324 |
| 起始页码 | 24 |
| 结束页码 | 1 |
| 卷号 | 24期号:1 |
| 英文摘要 | Quantifying surface-atmosphere exchange rates of particles is important for understanding the role of suspended particulate matter in radiative transfer, clouds, precipitation, and climate change. Emissions of coarse-mode particles with a diameter greater than 0.5 mu m provide giant cloud condensation nuclei and ice nuclei. These emissions are critical for understanding the evolution of cloud microphysical properties yet remain poorly understood. Here we introduce a new method that uses lidar retrievals of the elastic backscatter and Doppler velocity to obtain surface number emissions of particles with a diameter greater than 0.53 mu m . The technique is applied to study particle number fluxes over a 2-month period from 1 June to 10 August 2022 during the TRACER campaign at an urban site near Houston, TX, USA. We found that all the observed fluxes were positive (upwards), indicating particle emission from the surface. The fluxes followed a diurnal pattern and peaked near noon local time. Flux intensity varied through the 2 months with multi-day periods of strong fluxes and multi-day periods of weak fluxes. Emission particle number fluxes peaked near similar to 100 cm - 2 s - 1 . The daily averaged emission fluxes correlated with friction velocity and were anticorrelated with surface relative humidity. The emission flux can be parameterized as F = 3000 u * 4 , where u * is the friction velocity in m s - 1 and the emission flux F is in cm - 2 s - 1 . The u * dependence is consistent with emission from wind-driven erosion. Estimated values for the mass flux are in the lower range of literature values from non-urban sites. These results demonstrate that urban environments may play an important role in supplying coarse-mode particles to the boundary layer. We anticipate that quantification of these emissions will help constrain aerosol-cloud interaction models that use prognostic aerosol schemes. |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:001168767900001 |
| 来源期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/303593 |
| 作者单位 | North Carolina State University; University of California System; University of California Riverside |
| 推荐引用方式 GB/T 7714 | . Wind-driven emissions of coarse-mode particles in an urban environment[J],2024,24(1). |
| APA | (2024).Wind-driven emissions of coarse-mode particles in an urban environment.ATMOSPHERIC CHEMISTRY AND PHYSICS,24(1). |
| MLA | "Wind-driven emissions of coarse-mode particles in an urban environment".ATMOSPHERIC CHEMISTRY AND PHYSICS 24.1(2024). |
| 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 |
| 百度学术 |
| 百度学术中相似的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| 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。
