气候变化领域集成服务门户(CCPortal): New particle formation and its effect on cloud condensation nuclei abundance in the summer Arctic: A case study in the Fram Strait and Barents Sea

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DOI	10.5194/acp-19-14339-2019
	New particle formation and its effect on cloud condensation nuclei abundance in the summer Arctic: A case study in the Fram Strait and Barents Sea
	Kecorius S.; Vogl T.; Paasonen P.; Lampilahti J.; Rothenberg D.; Wex H.; Zeppenfeld S.; Van Pinxteren M.; Hartmann M.; Henning S.; Gong X.; Welti A.; Kulmala M.; Stratmann F.; Herrmann H.; Wiedensohler A.
发表日期	2019
ISSN	16807316
起始页码	14339
结束页码	14364
卷号	19 期号:22
英文摘要	In a warming Arctic the increased occurrence of new particle formation (NPF) is believed to originate from the declining ice coverage during summertime. Understanding the physico-chemical properties of newly formed particles, as well as mechanisms that control both particle formation and growth in this pristine environment, is important for interpreting aerosol-cloud interactions, to which the Arctic climate can be highly sensitive. In this investigation, we present the analysis of NPF and growth in the high summer Arctic. The measurements were made on-board research vessel Polarstern during the PS106 Arctic expedition. Four distinctive NPF and subsequent particle growth events were observed, during which particle (diameter in a range 10-50 nm) number concentrations increased from background values of approx. 40 up to 4000 cm-3. Based on particle formation and growth rates, as well as hygroscopicity of nucleation and the Aitken mode particles, we distinguished two different types of NPF events. First, some NPF events were favored by negative ions, resulting in more-hygroscopic nucleation mode particles and suggesting sulfuric acid as a precursor gas. Second, other NPF events resulted in less-hygroscopic particles, indicating the influence of organic vapors on particle formation and growth. To test the climatic relevance of NPF and its influence on the cloud condensation nuclei (CCN) budget in the Arctic, we applied a zero-dimensional, adiabatic cloud parcel model. At an updraft velocity of 0.1 m s-1, the particle number size distribution (PNSD) generated during nucleation processes resulted in an increase in the CCN number concentration by a factor of 2 to 5 compared to the background CCN concentrations. This result was confirmed by the directly measured CCN number concentrations. Although particles did not grow beyond 50 nm in diameter and the activated fraction of 15-50 nm particles was on average below 10 %, it could be shown that the sheer number of particles produced by the nucleation process is enough to significantly influence the background CCN number concentration. This implies that NPF can be an important source of CCN in the Arctic. However, more studies should be conducted in the future to understand mechanisms of NPF, sources of precursor gases and condensable vapors, as well as the role of the aged nucleation mode particles in Arctic cloud formation. © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	atmospheric chemistry; atmospheric modeling; cloud condensation nucleus; condensation; particulate matter; trace element; vapor pressure; Arctic; Arctic Ocean; Barents Sea; Fram Strait
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144015
作者单位	Leibniz Institute for Tropospheric Research (TROPOS), Leipzig, 04318, Germany; Institute for Meteorology, University of Leipzig, Leipzig, 04103, Germany; Department of Physics, University of Helsinki, P.O. Box 64, Helsinki, 00014, Finland; Clima Cell Inc., Boston, MA 02210, United States
推荐引用方式 GB/T 7714	Kecorius S.,Vogl T.,Paasonen P.,et al. New particle formation and its effect on cloud condensation nuclei abundance in the summer Arctic: A case study in the Fram Strait and Barents Sea[J],2019,19(22).
APA	Kecorius S..,Vogl T..,Paasonen P..,Lampilahti J..,Rothenberg D..,...&Wiedensohler A..(2019).New particle formation and its effect on cloud condensation nuclei abundance in the summer Arctic: A case study in the Fram Strait and Barents Sea.Atmospheric Chemistry and Physics,19(22).
MLA	Kecorius S.,et al."New particle formation and its effect on cloud condensation nuclei abundance in the summer Arctic: A case study in the Fram Strait and Barents Sea".Atmospheric Chemistry and Physics 19.22(2019).