Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-11985-2019 |
Quantifying aerosol size distributions and their temporal variability in the Southern Great Plains, USA | |
Marinescu, Peter J.1; Levin, Ezra J. T.1; Collins, Don2; Kreidenweis, Sonia M.1; van den Heever, Susan C.1 | |
2019-09-26 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:18页码:11985-12006 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A quality-controlled, 5-year dataset of aerosol number size distributions (particles with diameters (D-p) from 7 nm through 14 mu m) was developed using observations from a scanning mobility particle sizer, aerodynamic particle sizer, and a condensation particle counter at the Department of Energy's Southern Great Plains (SGP) site. This dataset was used for two purposes. First, typical characteristics of the aerosol size distribution (number, surface area, and volume) were calculated for the SGP site, both for the entire dataset and on a seasonal basis, and size distribution lognormal fit parameters are provided. While the median size distributions generally had similar shapes (four lognormal modes) in all the seasons, there were some significant differences between seasons. These differences were most significant in the smallest particles (D-p < 30 nm) and largest particles (D-p > 800 nm). Second, power spectral analysis was conducted on this long-term dataset to determine key temporal cycles of total aerosol concentrations, as well as aerosol concentrations in specified size ranges. The strongest cyclic signal was associated with a diurnal cycle in total aerosol number concentrations that was driven by the number concentrations of the smallest particles (D-p < 30 nm). This diurnal cycle in the smallest particles occurred in all seasons in similar to 50% of the observations, suggesting a persistent influence of new particle formation events on the number concentrations observed at the SGP site. This finding is in contrast with earlier studies that suggest new particle formation is observed primarily in the springtime at this site. The timing of peak concentrations associated with this diurnal cycle was shifted by several hours depending on the season, which was consistent with seasonal differences in insolation and boundary layer processes. Significant diurnal cycles in number concentrations were also found for particles with D-p between 140 and 800 nm, with peak concentrations occurring in the overnight hours, which were primarily associated with both nitrate and organic aerosol cycles. Weaker cyclic signals were observed for longer timescales (days to weeks) and are hypothesized to be related to the timescales of synoptic weather variability. The strongest periodic signals (3.5-5 and 7 d cycles) for these longer timescales varied depending on the season, with no cyclic signals and the lowest variability in the summer. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000488023500001 |
WOS关键词 | PARTICLE FORMATION ; SYNOPTIC CLIMATOLOGY ; OPTICAL-PROPERTIES ; GROWTH ; PROFILES ; SITE ; CLOUD ; LAYER |
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/187142 |
专题 | 地球科学 |
作者单位 | 1.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80526 USA; 2.Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA |
推荐引用方式 GB/T 7714 | Marinescu, Peter J.,Levin, Ezra J. T.,Collins, Don,et al. Quantifying aerosol size distributions and their temporal variability in the Southern Great Plains, USA[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(18):11985-12006. |
APA | Marinescu, Peter J.,Levin, Ezra J. T.,Collins, Don,Kreidenweis, Sonia M.,&van den Heever, Susan C..(2019).Quantifying aerosol size distributions and their temporal variability in the Southern Great Plains, USA.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(18),11985-12006. |
MLA | Marinescu, Peter J.,et al."Quantifying aerosol size distributions and their temporal variability in the Southern Great Plains, USA".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.18(2019):11985-12006. |
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