DOI: 10.1038/s41561-021-00751-y
论文题名: Open ocean and coastal new particle formation from sulfuric acid and amines around the Antarctic Peninsula
作者: Brean J. ; Dall’Osto M. ; Simó R. ; Shi Z. ; Beddows D.C.S. ; Harrison R.M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2021
卷: 14, 期: 6 起始页码: 383
结束页码: 388
语种: 英语
英文关键词: aerosol
; aerosol formation
; concentration (composition)
; ice-ocean interaction
; marginal ice zone
; open ocean
; sulfuric acid
; volcanic cloud
; Antarctic Peninsula
; Antarctica
; Southern Ocean
; Weddell Sea
; West Antarctica
英文摘要: New particle formation is globally one of the major sources of aerosol particles and cloud condensation nuclei. As primary emissions are a minor contributor to particle concentrations, secondary new particle formation processes are probably key in determining Antarctic aerosol number concentrations. However, our knowledge of new particle formation and its mechanisms in Antarctica is very limited. Here we study summertime open ocean and coastal new particle formation in the Antarctic Peninsula region based on both ship and station measurements. The rates of particle formation relative to sulfuric acid concentrations, as well as the sulfuric acid dimer-to-monomer ratios, were similar to those seen for sulfuric acid–dimethylamine–water nucleation. Numerous sulfuric acid–amine peaks were identified during new particle formation events, providing evidence that alkylamines were the bases that facilitated sulfuric acid nucleation. Most new particle formation events occurred in air masses arriving from the ice-covered Weddell Sea and its marginal ice zone, which are an important source of volatile sulfur and alkylamines. This nucleation mechanism is more efficient than the ion-induced sulfuric acid–ammonia pathway previously observed in Antarctica, and one that can occur rapidly under neutral conditions. This hitherto overlooked pathway to biologically driven aerosol formation should be considered for estimating aerosol and cloud condensation nuclei numbers in ocean–sea ice–aerosols–climate feedback models. © 2021, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169722
Appears in Collections: 气候变化与战略
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作者单位: Division of Environmental Health and Risk Management, School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; Institute of Marine Science, Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain; Department of Environmental Sciences/Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, Saudi Arabia
Recommended Citation:
Brean J.,Dall’Osto M.,Simó R.,et al. Open ocean and coastal new particle formation from sulfuric acid and amines around the Antarctic Peninsula[J]. Nature Geoscience,2021-01-01,14(6)