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Markku Kulmala
University of Helsinki
1,542Publications
112H-index
54.6kCitations
Publications 1542
Newest
Published on Oct 1, 2019in Agricultural and Forest Meteorology 4.19
J. Tuure (UH: University of Helsinki), Antti Korpela2
Estimated H-index: 2
(VTT Technical Research Centre of Finland)
+ 8 AuthorsMarkku Kulmala112
Estimated H-index: 112
(UH: University of Helsinki)
Abstract This study characterized different polyethylene (PE) and polyvinyl chloride (PVC) plastic foil materials effectiveness for dew collection in arid field-conditions in Kenya. Dew yields were collected daily for one year. Ten dew collectors with four different plastic foils were setup in the experimental field. The cumulated dew yields ranged from 18.9 to 25.3 mm. The greatest cumulated dew yields were 25.3 mm (nightly mean 0.096 mm) and 24.3 mm (nightly mean 0.093) measured with PVC and O...
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Published on Aug 1, 2019in Environment International 7.94
Alma Lorelei de Jesus1
Estimated H-index: 1
,
M M Rahman BEng MEng Mieb Mbsme51
Estimated H-index: 51
+ 28 AuthorsAijun Ding39
Estimated H-index: 39
Abstract Can mitigating only particle mass, as the existing air quality measures do, ultimately lead to reduction in ultrafine particles (UFP)? The aim of this study was to provide a broader urban perspective on the relationship between UFP, measured in terms of particle number concentration (PNC) and PM 2.5 (mass concentration of particles with aerodynamic diameter 2.5 were acquired from 10 cities located in North America, Europe, Asia, and Australia over a 12-month period. A pairwise compariso...
1 Citations Source Cite
Published on Jun 7, 2019in Atmospheric Chemistry and Physics 5.67
Jingda Liu (NUIST: Nanjing University of Information Science and Technology), Lili Wang (UH: University of Helsinki)+ 11 AuthorsDongsheng Ji22
Estimated H-index: 22
Abstract. The ozone variation characteristics and the impact of synoptic and local meteorological factors in North China were analysed quantitively during the warm season from 2013 to 2017 based on multi-city, in-situ ozone and meteorological data, as well as meteorological reanalysis. The domain-averaged maximum daily 8-h running average O 3 (MDA8 O 3 ) concentration was 122 ± 11 μg m −3 with an increase rate of 7.88 μg m −3 year −1 , and the three most highly-polluted months were June (149 μg ...
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Published on Mar 21, 2019in Journal of Geophysical Research 3.23
Maher Sahyoun (CNRS: Centre national de la recherche scientifique), Evelyn Freney18
Estimated H-index: 18
(CNRS: Centre national de la recherche scientifique)
+ 12 AuthorsChao Yan9
Estimated H-index: 9
(UH: University of Helsinki)
Volcanic emissions can significantly affect the Earth's radiation budget by emitting aerosol particles and gas‐phase species that can result in the new particle formation (NPF). These particles can scatter solar radiation or modify cloud properties, with consequences on health, weather, and climate. To our knowledge, this is the first dedicated study detailing how gas‐phase precursors emitted from volcanic plumes can influence the NPF. A series of airborne measurements were performed around the ...
1 Citations Source Cite
Published on May 16, 2019
Ugo Molteni9
Estimated H-index: 9
(Paul Scherrer Institute),
M. Savrie124
Estimated H-index: 124
(Goethe University Frankfurt)
+ 34 AuthorsJonathan Duplissy32
Estimated H-index: 32
(UH: University of Helsinki)
Terpenes are emitted by vegetation and their oxidation in the atmosphere is an important source of secondary organic aerosol (SOA). A part of this oxidation can proceed through an autoxidation process yielding highly-oxygenated organic molecules (HOM) with low saturation vapour pressure. They can therefore contribute, even in the absence of sulphuric acid, to new-particle formation (NPF). The understanding of the autoxidation mechanism and its kinetics is still far from complete. Here we present...
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Published on Apr 18, 2019in Journal of Physical Chemistry Letters 7.33
Lauri R. Ahonen5
Estimated H-index: 5
(UH: University of Helsinki),
Chenxi Li3
Estimated H-index: 3
(ETH Zurich)
+ 5 AuthorsChristopher J. Hogan22
Estimated H-index: 22
(UMN: University of Minnesota)
Nanometer-scale clusters form from vapor-phase precursors and can subsequently grow into nanoparticles during atmospheric nucleation events. A particularly interesting set of clusters relevant to nucleation is hybrid iodine pentoxide–iodic acid clusters of the form (I2O5)x(HIO3)y as these clusters have been observed in coastal region nucleation events in anomalously high concentrations. To better understand their properties, we utilized ion mobility-mass spectrometry to probe the structures of c...
1 Citations Source Cite
Published on Mar 27, 2019in Chemical Reviews 54.30
Federico Bianchi21
Estimated H-index: 21
(UH: University of Helsinki),
Theo Kurtén36
Estimated H-index: 36
(UH: University of Helsinki)
+ 16 AuthorsThomas F. Mentel29
Estimated H-index: 29
(Forschungszentrum Jülich)
Highly oxygenated organic molecules (HOM) are formed in the atmosphere via autoxidation involving peroxy radicals arising from volatile organic compounds (VOC). HOM condense on pre-existing particles and can be involved in new particle formation. HOM thus contribute to the formation of secondary organic aerosol (SOA), a significant and ubiquitous component of atmospheric aerosol known to affect the Earth’s radiation balance. HOM were discovered only very recently, but the interest in these compo...
2 Citations Source Cite
Published on Mar 13, 2019in Atmospheric Chemistry and Physics 5.67
Ying Zhou (Huada: Beijing University of Chemical Technology), Lubna Dada4
Estimated H-index: 4
(Huada: Beijing University of Chemical Technology)
+ 15 AuthorsFederico Bianchi21
Estimated H-index: 21
(UH: University of Helsinki)
Abstract. Aerosol number concentration varying spatially and temporally is a good indicator of the dynamic behavior of Beijing's atmospheric cocktail. This variation represents the strength of different contributing primary and secondary sources such as traffic and new particle formation, respectively. In this paper we report size-segregated particle number concentrations observed at newly developed Beijing station during winter 2018. Our measurements cover number size distributions of particles...
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Published on Feb 28, 2019in Atmospheric Chemistry and Physics 5.67
Yicheng Shen3
Estimated H-index: 3
(UH: University of Helsinki),
A. Virkkula23
Estimated H-index: 23
(UH: University of Helsinki)
+ 10 AuthorsXin Huang30
Estimated H-index: 30
(NU: Nanjing University)
Abstract. The concentration of cloud condensation nuclei (CCN) is an essential parameter affecting aerosol-cloud interactions within warm clouds. Long-term CCN number concentration (NCCN) data are scarce, there are a lot more data on aerosol optical properties (AOPs). It is therefore valuable to derive parameterizations for estimating NCCN from AOP measurements. Such parameterizatios have been made earlier, in the present work a new one is presented. The relationships between AOPs, NCCN and part...
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Published on Feb 27, 2019in Journal of Geophysical Research 3.23
Dmitri Moisseev18
Estimated H-index: 18
(UH: University of Helsinki),
Susanna Lautaportti1
Estimated H-index: 1
(UH: University of Helsinki)
+ 4 AuthorsMarkku Kulmala112
Estimated H-index: 112
(UH: University of Helsinki)
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