scholarly journals Parameterization of new particle formation and growth at the Preila station

2005 ◽  
Vol 45 (2) ◽  
pp. 139-147 ◽  
Author(s):  
Kristina Plauškaitė ◽  
Rita Kazlauskaitė ◽  
Jelena Andriejauskienė ◽  
Vidmantas Ulevičius
Keyword(s):  
Particle Formation ◽  
New Particle Formation ◽  
Particle Formation And Growth

Connection of organics to atmospheric new particle formation and growth at an urban site of Beijing

2015 ◽  
Vol 103 ◽  
pp. 7-17 ◽  
Author(s):  
Z.B. Wang ◽  
M. Hu ◽  
X.Y. Pei ◽  
R.Y. Zhang ◽  
P. Paasonen ◽  
...  
Keyword(s):  
Particle Formation ◽  
Urban Site ◽  
New Particle Formation ◽  
Particle Formation And Growth

scholarly journals New particle formation, growth and apparent shrinkage at a rural background site in western Saudi Arabia

2019 ◽  
Vol 19 (16) ◽  
pp. 10537-10555 ◽  
Author(s):  
Simo Hakala ◽  
Mansour A. Alghamdi ◽  
Pauli Paasonen ◽  
Ville Vakkari ◽  
Mamdouh I. Khoder ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Growth Rates ◽  
Particle Formation ◽  
Anthropogenic Sources ◽  
New Particle Formation ◽  
Rural Background ◽  
Background Site ◽  
High Solar Radiation ◽  
Particle Formation And Growth ◽  
Condensation Sink

Abstract. Atmospheric aerosols have significant effects on human health and the climate. A large fraction of these aerosols originates from secondary new particle formation (NPF), where atmospheric vapors form small particles that subsequently grow into larger sizes. In this study, we characterize NPF events observed at a rural background site of Hada Al Sham (21.802∘ N, 39.729∘ E), located in western Saudi Arabia, during the years 2013–2015. Our analysis shows that NPF events occur very frequently at the site, as 73 % of all the 454 classified days were NPF days. The high NPF frequency is likely explained by the typically prevailing conditions of clear skies and high solar radiation, in combination with sufficient amounts of precursor vapors for particle formation and growth. Several factors suggest that in Hada Al Sham these precursor vapors are related to the transport of anthropogenic emissions from the coastal urban and industrial areas. The median particle formation and growth rates for the NPF days were 8.7 cm−3 s−1 (J7 nm) and 7.4 nm h−1 (GR7−12 nm), respectively, both showing highest values during late summer. Interestingly, the formation and growth rates increase as a function of the condensation sink, likely reflecting the common anthropogenic sources of NPF precursor vapors and primary particles affecting the condensation sink. A total of 76 % of the NPF days showed an unusual progression, where the observed diameter of the newly formed particle mode started to decrease after the growth phase. In comparison to most long-term measurements, the NPF events in Hada Al Sham are exceptionally frequent and strong both in terms of formation and growth rates. In addition, the frequency of the decreasing mode diameter events is higher than anywhere else in the world.

scholarly journals Seasonal Characteristics of New Particle Formation and Growth in Urban Beijing

2020 ◽  
Vol 54 (14) ◽  
pp. 8547-8557 ◽  
Author(s):  
Chenjuan Deng ◽  
Yueyun Fu ◽  
Lubna Dada ◽  
Chao Yan ◽  
Runlong Cai ◽  
...  
Keyword(s):  
Particle Formation ◽  
New Particle Formation ◽  
Seasonal Characteristics ◽  
Particle Formation And Growth

scholarly journals Ambient observations of dimers from terpene oxidation in the gas phase: Implications for new particle formation and growth

2017 ◽  
Vol 44 (6) ◽  
pp. 2958-2966 ◽  
Author(s):  
Claudia Mohr ◽  
Felipe D. Lopez-Hilfiker ◽  
Taina Yli-Juuti ◽  
Arto Heitto ◽  
Anna Lutz ◽  
...  
Keyword(s):  
Gas Phase ◽  
Particle Formation ◽  
New Particle Formation ◽  
Terpene Oxidation ◽  
Particle Formation And Growth

scholarly journals New particle formation infrequently observed in Himalayan foothills – why?

2011 ◽  
Vol 11 (4) ◽  
pp. 13193-13228 ◽  
Author(s):  
K. Neitola ◽  
E. Asmi ◽  
M. Komppula ◽  
A.-P. Hyvärinen ◽  
T. Raatikainen ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Growth Rates ◽  
Secondary Particle ◽  
Particle Formation ◽  
Meteorological Conditions ◽  
New Particle Formation ◽  
Secondary Sources ◽  
Himalayan Foothills ◽  
Particle Formation And Growth ◽  
Himalayan Aerosols

Abstract. A fraction of the Himalayan aerosols originate from secondary sources, which are currently poorly quantified. To clarify the climatic importance of regional secondary particle formation at Himalayas, data from 2005 to 2010 of continuous aerosol measurements at a high-altitude (2180 m) Indian Himalayan site, Mukteshwar, were analyzed. For this period, the days were classified, and the particle formation and growth rates were calculated for clear new particle formation (NPF) event days. The NPF events showed a pronounced seasonal cycle. The frequency of the events peaked in spring, when the ratio between event and non-event days was 53 %, whereas the events were truly sporadic on any other seasons. The annual mean particle formation and growth rates were 0.40 cm−3 s−1 and 2.43 nm h−1, respectively. The clear annual cycle was found to be mainly controlled by the seasonal evolution of the Planetary Boundary Layer (PBL) height together with local meteorological conditions. Spring NPF events were connected with increased PBL height, and therefore characterised as boundary layer events, while the rare events in other seasons represented lower free tropospheric particle formation.

scholarly journals Atmospheric new particle formation and growth: review of field observations

2018 ◽  
Vol 13 (10) ◽  
pp. 103003 ◽  
Author(s):  
Veli-Matti Kerminen ◽  
Xuemeng Chen ◽  
Ville Vakkari ◽  
Tuukka Petäjä ◽  
Markku Kulmala ◽  
...  
Keyword(s):  
Particle Formation ◽  
Field Observations ◽  
New Particle Formation ◽  
Particle Formation And Growth

scholarly journals Connections between atmospheric sulphuric acid and new particle formation during QUEST III–IV campaigns in Heidelberg and Hyytiälä

2006 ◽  
Vol 6 (5) ◽  
pp. 10837-10882 ◽  
Author(s):  
I. Riipinen ◽  
S.-L. Sihto ◽  
M. Kulmala ◽  
F. Arnold ◽  
M. Dal Maso ◽  
...  
Keyword(s):  
Sulphuric Acid ◽  
Power Law ◽  
Growth Rates ◽  
Particle Production ◽  
Particle Formation ◽  
Rural Site ◽  
Main Process ◽  
Time Lags ◽  
New Particle Formation ◽  
Particle Formation And Growth

Abstract. This study investigates the connections between atmospheric sulphuric acid and new particle formation during QUEST III and BACCI/QUEST IV campaigns. The campaigns have been conducted in Heidelberg (2004) and Hyytiälä (2005), the first representing a polluted site surrounded by deciduous forest, and the second a rural site in a boreal forest environment. We have studied the role of sulphuric acid in particle formation and growth by determining 1) the power-law dependencies between sulphuric acid ([H2SO4]), and particle concentrations (N3–6) or formation rates at 1 nm and 3 nm (J1 and J3; 2) the time delays between [H2SO4] and N3–6 or J3, and the growth rates for 1–3 nm particles; 3) the empirical nucleation coefficients A and K in relations J1=A[H2SO4] and J1=K[H2SO4]2, respectively; 4) theoretical predictions for J1 and J3 for the days when no significant particle formation is observed, based on the observed sulphuric acid concentrations and condensation sinks. In both environments, N3–6 or J3 and [H2SO4] were linked via a power-law relation with exponents typically ranging from 1 to 2. The result suggests that the cluster activation theory and kinetic nucleation have the potential to explain the observed particle formation. However, some differences between the sites existed: The 1–3 nm growth rates were slightly higher and the nucleation coefficients about an order of magnitude greater in Heidelberg than in Hyytiälä conditions. The time lags between J3 and [H2SO4] were consistently lower than the corresponding delays between N3–6 and [H2SO4]. The exponents in the J3∝[H2SO4]nJ3-connection were consistently higher than or equal to the exponents in the relation N3–6∝[H2SO4]nN36. In the J1 values, no significant differences were found between the observed rates on particle formation event days and the predictions on non-event days. The J3 values predicted by the cluster activation or kinetic nucleation hypotheses, on the other hand, were considerably lower on non-event days than the rates observed on particle formation event days. This study provides clear evidence implying that the main process limiting the observable particle formation is the competition between the growth of the freshly formed particles and their loss by scavenging, rather than the initial particle production by nucleation of sulphuric acid. In general, it can be concluded that the simple models based on sulphuric acid concentrations and particle formation by cluster activation or kinetic nucleation can predict the occurence of atmospheric particle formation and growth well, if the particle scavenging is accurately accounted for.

New Particle Formation and Growth in the Troposphere†

2010 ◽  
Vol 82 (19) ◽  
pp. 7871-7878 ◽  
Author(s):  
Bryan R. Bzdek ◽  
Murray V. Johnston
Keyword(s):  
Particle Formation ◽  
New Particle Formation ◽  
Particle Formation And Growth
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