Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-8101-2017 |
Pan-Arctic aerosol number size distributions: seasonality and transport patterns | |
Freud, Eyal1,2; Krejci, Radovan1,2; Tunved, Peter1,2; Leaitch, Richard3; Nguyen, Quynh T.4; Massling, Andreas5; Skov, Henrik5; Barrie, Leonard2,6 | |
2017-07-04 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden; Canada; Denmark |
英文摘要 | The Arctic environment has an amplified response to global climatic change. It is sensitive to human activities that mostly take place elsewhere. For this study, a multi-year set of observed aerosol number size distributions in the diameter range of 10 to 500 nm from five sites around the Arctic Ocean (Alert, Villum Research Station - Station Nord, Zeppelin, Tiksi and Barrow) was assembled and analysed. A cluster analysis of the aerosol number size distributions revealed four distinct distributions. Together with Lagrangian air parcel back-trajectories, they were used to link the observed aerosol number size distributions with a variety of transport regimes. This analysis yields insight into aerosol dynamics, transport and removal processes, on both an intra- and an inter-monthly scale. For instance, the relative occurrence of aerosol number size distributions that indicate new particle formation (NPF) event is near zero during the dark months, increases gradually to similar to 40% from spring to summer, and then collapses in autumn. Also, the likelihood of Arctic haze aerosols is minimal in summer and peaks in April at all sites. The residence time of accumulation-mode particles in the Arctic troposphere is typically long enough to allow tracking them back to their source regions. Air flow that passes at low altitude over central Siberia and western Russia is associated with relatively high concentrations of accumulation-mode particles (N-acc) at all five sites - often above 150 cm(-3). There are also indications of air descending into the Arctic boundary layer after transport from lower latitudes. The analysis of the back-trajectories together with the meteorological fields along them indicates that the main driver of the Arctic annual cycle of N-acc, on the larger scale, is when atmospheric transport covers the source regions for these particles in the 10-day period preceding the observations in the Arctic. The scavenging of these particles by precipitation is shown to be important on a regional scale and it is most active in summer. Cloud processing is an additional factor that enhances the N-acc annual cycle. There are some consistent differences between the sites that are beyond the year-to-year variability. They are the result of differences in the proximity to the aerosol source regions and to the Arctic Ocean sea-ice edge, as well as in the exposure to free-tropospheric air and in precipitation patterns - to mention a few. Hence, for most purposes, aerosol observations from a single Arctic site cannot represent the entire Arctic region. Therefore, the results presented here are a powerful observational benchmark for evaluation of detailed climate and air chemistry modelling studies of aerosols throughout the vast Arctic region. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404773700005 |
WOS关键词 | LONG-TERM OBSERVATIONS ; ATMOSPHERIC AEROSOL ; BLACK CARBON ; NY-ALESUND ; BOUNDARY-LAYER ; AIR-POLLUTION ; PARTICLE FORMATION ; CLUSTER-ANALYSIS ; POLAR SUNRISE ; MID-LATITUDES |
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/24987 |
专题 | 地球科学 |
作者单位 | 1.Stockholm Univ, Dept Environm Sci & Analyt Chem, S-10691 Stockholm, Sweden; 2.Stockholm Univ, Bolin Ctr Climate Res, S-10691 Stockholm, Sweden; 3.Environm & Climate Change, Climate Res Div, Toronto, ON, Canada; 4.Aarhus Univ, Dept Engn, DK-8200 Aarhus, Denmark; 5.Aarhus Univ, Dept Environm Sci, Arctic Res Ctr, DK-4000 Roskilde, Denmark; 6.Stockholm Univ, Dept Geol Sci, S-10691 Stockholm, Sweden |
推荐引用方式 GB/T 7714 | Freud, Eyal,Krejci, Radovan,Tunved, Peter,et al. Pan-Arctic aerosol number size distributions: seasonality and transport patterns[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(13). |
APA | Freud, Eyal.,Krejci, Radovan.,Tunved, Peter.,Leaitch, Richard.,Nguyen, Quynh T..,...&Barrie, Leonard.(2017).Pan-Arctic aerosol number size distributions: seasonality and transport patterns.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(13). |
MLA | Freud, Eyal,et al."Pan-Arctic aerosol number size distributions: seasonality and transport patterns".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.13(2017). |
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