Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-20-3151-2020 |
Long-term sub-micrometer aerosol chemical composition in the boreal forest: inter- and intra-annual variability | |
Heikkinen, Liine1; Aijala, Mikko1; Riva, Matthieu1,2; Luoma, Krista1; Dallenbach, Kaspar1; Aalto, Juho3; Aalto, Pasi1; Aliaga, Diego1; Aurela, Minna4; Keskinen, Helmi1; Makkonen, Ulla4; Rantala, Pekka1; Kulmala, Markku1; Petaja, Tuukka1; Worsnop, Douglas1,5; Ehn, Mikael1 | |
2020-03-16 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2020 |
卷号 | 20期号:5页码:3151-3180 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland; France; USA |
英文摘要 | The Station for Measuring Ecosystem Atmosphere Relations (SMEAR) II is well known among atmospheric scientists due to the immense amount of observational data it provides of the Earth atmosphere interface. Moreover, SMEAR II plays an important role for the large European research infrastructure, enabling the large scientific community to tackle climate- and air-pollution-related questions, utilizing the high-quality long-term data sets recorded at the site. So far, this well-documented site was missing the description of the seasonal variation in aerosol chemical composition, which helps understanding the complex biogeochemical and physical processes governing the forest ecosystem. Here, we report the sub-micrometer aerosol chemical composition and its variability, employing data measured between 2012 and 2018 using an Aerosol Chemical Speciation Monitor (ACSM). We observed a bimodal seasonal trend in the sub-micrometer aerosol concentration culminating in February (2.7, 1.6, and 5.1 mu g m(-3) for the median, 25th, and 75th percentiles, respectively) and July (4.2, 2.2, and 5.7 mu g m(-3) for the median, 25th, and 75th percentiles, respectively). The wintertime maximum was linked to an enhanced presence of inorganic aerosol species (ca. 50 %), whereas the summertime maximum (ca. 80 % organics) was linked to biogenic secondary organic aerosol (SOA) formation. During the exceptionally hot months of July of 2014 and 2018, the organic aerosol concentrations were up to 70 % higher than the 7-year July mean. The projected increase in heat wave frequency over Finland will most likely influence the loading and chemical composition of aerosol particles in the future. Our findings suggest strong influence of meteorological conditions such as radiation, ambient temperature, and wind speed and direction on aerosol chemical composition. To our understanding, this is the longest time series reported describing the aerosol chemical composition measured online in the boreal region, but the continuous monitoring will also be maintained in the future. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000521134700003 |
WOS关键词 | VOLATILE ORGANIC-COMPOUNDS ; SOURCE APPORTIONMENT ; MASS-SPECTROMETER ; INORGANIC AEROSOL ; ATMOSPHERIC AEROSOL ; SEMICONTINUOUS GAS ; DATA SETS ; PTR-MS ; PARTICLE ; HYYTIALA |
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/278688 |
专题 | 地球科学 |
作者单位 | 1.Univ Helsinki, Inst Atmospher & Earth Syst Res Phys, Fac Sci, FIN-00014 Helsinki, Finland; 2.Univ Lyon, Univ Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626 Villeurbanne, France; 3.Univ Helsinki, Inst Atmospher & Earth Syst Res Forest Sci, Fac Agr & Forestry, FIN-00014 Helsinki, Finland; 4.Finnish Meteorol Inst, Atmospher Composit Res, FIN-00101 Helsinki, Finland; 5.Aerodyne Res Inc, Billerica, MA USA |
推荐引用方式 GB/T 7714 | Heikkinen, Liine,Aijala, Mikko,Riva, Matthieu,et al. Long-term sub-micrometer aerosol chemical composition in the boreal forest: inter- and intra-annual variability[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(5):3151-3180. |
APA | Heikkinen, Liine.,Aijala, Mikko.,Riva, Matthieu.,Luoma, Krista.,Dallenbach, Kaspar.,...&Ehn, Mikael.(2020).Long-term sub-micrometer aerosol chemical composition in the boreal forest: inter- and intra-annual variability.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(5),3151-3180. |
MLA | Heikkinen, Liine,et al."Long-term sub-micrometer aerosol chemical composition in the boreal forest: inter- and intra-annual variability".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.5(2020):3151-3180. |
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