Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-6185-2019 |
Regional new particle formation as modulators of cloud condensation nuclei and cloud droplet number in the eastern Mediterranean | |
Kalkavouras, Panayiotis1,2; Bougiatioti, Aikaterini1,2; Kalivitis, Nikos1; Stavroulas, Iasonas1,2,3; Tombrou, Maria4; Nenes, Athanasios2,5,6; Mihalopoulos, Nikolaos1,2 | |
2019-05-09 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:9页码:6185-6203 |
文章类型 | Article |
语种 | 英语 |
国家 | Greece; Cyprus; Switzerland |
英文摘要 | A significant fraction of atmospheric particles that serve as cloud condensation nuclei (CCN) are thought to originate from the condensational growth of new particle formation (NPF) from the gas phase. Here, 7 years of continuous aerosol and meteorological measurements (June 2008 to May 2015) at a remote background site of the eastern Mediterranean were recorded and analyzed to assess the impact of NPF (of 162 episodes identified) on CCN and cloud droplet number concentration (CDNC) formation in the region. A new metric is introduced to quantitatively determine the initiation and duration of the influence of NPF on the CCN spectrum. NPF days were found to increase CCN concentrations (from 0.10 % to 1.00 % supersaturation) between 29 % and 77 %. Enhanced CCN concentrations from NPF are mostly observed, as expected, under low preexisting particle concentrations and occur in the afternoon, relatively later in the winter and autumn than in the summer. Potential impacts of NPF on cloud formation were quantified by introducing the observed aerosol size distributions and chemical composition into an established cloud droplet parameterization. We find that the supersaturations that develop are very low (ranging between 0.03 % and 0.27 %) for typical boundary layer dynamics (sigma(w) similar to 0.3 m s(-1)) and NPF is found to enhance CDNC by a modest 13 %. This considerable contrast between CCN and CDNC response is in part from the different supersaturation levels considered, but also because supersaturation drops from increasing CCN because of water vapor competition effects during the process of droplet formation. The low cloud supersaturation further delays the appearance of NPF impacts on CDNC to clouds formed in the late evening and nighttime - which has important implications for the extent and types of indirect effects induced by NPF events. An analysis based on CCN concentrations using prescribed supersaturation can provide very different, even misleading, conclusions and should therefore be avoided. The proposed approach here offers a simple, yet highly effective way for a more realistic impact assessment of NPF events on cloud formation. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467454600004 |
WOS关键词 | SPECIATION MONITOR ACSM ; GLOBAL CLIMATE MODELS ; BOUNDARY-LAYER ; AEGEAN SEA ; ATMOSPHERIC AEROSOLS ; CHEMICAL-COMPOSITION ; ACTIVATION KINETICS ; SUBMICRON AEROSOLS ; SIZE DISTRIBUTION ; CCN PRODUCTION |
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/183180 |
专题 | 地球科学 |
作者单位 | 1.Univ Crete, Dept Chem, Envirom Chem Proc Lab, Iraklion 71003, Greece; 2.Natl Observ Athens, Inst Environm Res & Sustainable Dev, Palea Penteli 15236, Greece; 3.Cyprus Inst, Energy Environm & Water Res Ctr, CY-2121 Nicosia, Cyprus; 4.Univ Athens, Dept Phys, Athens 15784, Greece; 5.Ecole Polytech Fed Lausanne, Sch Architecture Civil & Environm Engn, Lab Atmospher Proc & Their Impacts, CH-1015 Lausanne, Switzerland; 6.Fdn Res & Technol Hellas, Inst Chem Engn Sci, Patras 26504, Greece |
推荐引用方式 GB/T 7714 | Kalkavouras, Panayiotis,Bougiatioti, Aikaterini,Kalivitis, Nikos,et al. Regional new particle formation as modulators of cloud condensation nuclei and cloud droplet number in the eastern Mediterranean[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(9):6185-6203. |
APA | Kalkavouras, Panayiotis.,Bougiatioti, Aikaterini.,Kalivitis, Nikos.,Stavroulas, Iasonas.,Tombrou, Maria.,...&Mihalopoulos, Nikolaos.(2019).Regional new particle formation as modulators of cloud condensation nuclei and cloud droplet number in the eastern Mediterranean.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(9),6185-6203. |
MLA | Kalkavouras, Panayiotis,et al."Regional new particle formation as modulators of cloud condensation nuclei and cloud droplet number in the eastern Mediterranean".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.9(2019):6185-6203. |
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