Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2019.104838 |
Characterizing atmospheric controls on winter urban pollution in a topographic basin setting using Radon-222 | |
Kikaj, Dafina1,2; Chambers, Scott D.3; Kobal, Matjaz4; Crawford, Jagoda3; Vaupotic, Janja2 | |
2020-06-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2020 |
卷号 | 237 |
文章类型 | Article |
语种 | 英语 |
国家 | Slovenia; Australia |
英文摘要 | Using hourly meteorological, air quality and radon observations over two winters (2016-2017 and 2017-2018), we combine diurnal and synoptic timescale radon-based mixing classification techniques, for the first time, to better understand air quality variability in the sub-Alpine city of Ljubljana. Of the two winters, only the second experienced significant snow cover (> 1 month). A total of six mixing classes were defined for each winter: 5 diurnal and 1 synoptic ("persistent temperature inversion", PTI); the latter being internally categorised as "strong" or "weak". Diurnal and synoptic changes in mixing state played an important role in air quality variability in both winters. Little diurnal accumulation of local pollutants (CO, NO2, PM10, and BC) was observed for wind speeds >= 1.5 m s(-1) (mixing classes #1 to #3). Under these windy conditions significant remote contributions to SO2 and O-3 concentrations in Ljubljana were observed, primarily from the Po Valley region. The most stable conditions (class #5 and PTI days), characterized by nocturnal wind speeds <= 0.5 m s(-1) or rates of 2 m air temperature change >= 1.5 degrees C h(-1), were associated with the worst air quality conditions. Only under class #5 and PTI conditions did daily-mean PM10, concentrations exceed both EU and WHO guideline values. The absence of snow cover in the first winter resulted in stronger thermodynamic stability and higher pollution concentrations. Other contributing factors included a 28% larger traffic source near the monitoring site and a 17% greater consumption of heating fuel that winter in Ljubljana. |
英文关键词 | Radon Stability Persistent temperature inversion Complex topography Urban pollution |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000525323100013 |
WOS关键词 | PARTICULATE AIR-POLLUTION ; BLACK CARBON ; METEOROLOGICAL VARIABLES ; TURBULENT DISSIPATION ; RADON CONCENTRATION ; SUB-ALPINE ; STABILITY ; LAKE ; TRANSPORT ; POOL |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/278893 |
专题 | 地球科学 |
作者单位 | 1.Jozef Stefan Int Postgrad Sch, Jamova Cesta 39, Ljubljana 1000, Slovenia; 2.Jozef Stefan Inst, Dept Environm Sci, Jamova Cesta 39, Ljubljana 1000, Slovenia; 3.ANSTO, Environm Res, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia; 4.Aerosol Doo, Kamniska Ulica 39A, Ljubljana 1000, Slovenia |
推荐引用方式 GB/T 7714 | Kikaj, Dafina,Chambers, Scott D.,Kobal, Matjaz,et al. Characterizing atmospheric controls on winter urban pollution in a topographic basin setting using Radon-222[J]. ATMOSPHERIC RESEARCH,2020,237. |
APA | Kikaj, Dafina,Chambers, Scott D.,Kobal, Matjaz,Crawford, Jagoda,&Vaupotic, Janja.(2020).Characterizing atmospheric controls on winter urban pollution in a topographic basin setting using Radon-222.ATMOSPHERIC RESEARCH,237. |
MLA | Kikaj, Dafina,et al."Characterizing atmospheric controls on winter urban pollution in a topographic basin setting using Radon-222".ATMOSPHERIC RESEARCH 237(2020). |
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