Self-consistent binary cluster size distributions of sulfuric acid-water system

2000 ◽  
Author(s):  
Madis Noppel
Keyword(s):  
Sulfuric Acid ◽  
Cluster Size ◽  
Water System ◽  
Acid Water ◽  
Size Distributions ◽  
Self Consistent

Investigation the solubility difference of sodium 4-nitrotoluene-2-sulfonate and 4-nitrotoluene-2-sulfonic acid in (sulfuric acid+water) system

2013 ◽  
Vol 358 ◽  
pp. 151-155 ◽  
Author(s):  
Ying Yang ◽  
Qing Xia ◽  
Hui Zhang ◽  
Feng-Bao Zhang ◽  
Guo-Liang Zhang
Keyword(s):  
Sulfuric Acid ◽  
Sulfonic Acid ◽  
Water System ◽  
Acid Water

scholarly journals The potential role of organics in new particle formation and initial growth in the remote tropical upper troposphere

2020 ◽  
Vol 20 (23) ◽  
pp. 15037-15060
Author(s):  
Agnieszka Kupc ◽  
Christina J. Williamson ◽  
Anna L. Hodshire ◽  
Jan Kazil ◽  
Eric Ray ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Sulfuric Acid ◽  
Nucleation And Growth ◽  
Box Model ◽  
Acid Water ◽  
Size Distributions ◽  
Global Models ◽  
Upper Troposphere ◽  
Organic Species ◽  
Organic Growth

Abstract. Global observations and model studies indicate that new particle formation (NPF) in the upper troposphere (UT) and subsequent particles supply 40 %–60 % of cloud condensation nuclei (CCN) in the lower troposphere, thus affecting the Earth's radiative budget. There are several plausible nucleation mechanisms and precursor species in this atmospheric region, which, in the absence of observational constraints, lead to uncertainties in modeled aerosols. In particular, the type of nucleation mechanism and concentrations of nucleation precursors, in part, determine the spatial distribution of new particles and resulting spatial distribution of CCN from this source. Although substantial advances in understanding NPF have been made in recent years, NPF processes in the UT in pristine marine regions are still poorly understood and are inadequately represented in global models. Here, we evaluate commonly used and state-of-the-art NPF schemes in a Lagrangian box model to assess which schemes and precursor concentrations best reproduce detailed in situ observations. Using measurements of aerosol size distributions (0.003 < Dp < 4.8 µm) in the remote marine troposphere between ∼0.18 and 13 km altitude obtained during the NASA Atmospheric Tomography (ATom) mission, we show that high concentrations of newly formed particles in the tropical UT over both the Atlantic and Pacific oceans are associated with outflow regions of deep convective clouds. We focus analysis on observations over the remote Pacific Ocean, which is a region less perturbed by continental emissions than the Atlantic. Comparing aerosol size distribution measurements over the remote Pacific with box model simulations for 32 cases shows that none of the NPF schemes most commonly used in global models, including binary nucleation of sulfuric acid and water (neutral and ion-assisted) and ternary involving sulfuric acid, water, and ammonia, are consistent with observations, regardless of precursor concentrations. Through sensitivity studies, we find that the nucleation scheme among those tested that is able to explain most consistently (21 of 32 cases) the observed size distributions is that of Riccobono et al. (2014), which involves both organic species and sulfuric acid. The method of Dunne et al. (2016), involving charged sulfuric acid–water–ammonia nucleation, when coupled with organic growth of the nucleated particles, was most consistent with the observations for 5 of 32 cases. Similarly, the neutral sulfuric acid–water–ammonia method of Napari (2002), when scaled with a tuning factor and with organic growth added, was most consistent for 6 of 32 cases. We find that to best reproduce both nucleation and growth rates, the mixing ratios of gas-phase organic precursors generally need to be at least twice that of SO2, a proxy for dimethyl sulfide (DMS). Unfortunately, we have no information on the nature of oxidized organic species that participated in NPF in this region. Global models rarely include organic-driven nucleation and growth pathways in UT conditions where globally significant NPF takes place, which may result in poor estimates of NPF and CCN abundance and contribute to uncertainties in aerosol–cloud–radiation effects. Furthermore, our results indicate that the organic aerosol precursor vapors may be important in the tropical UT above marine regions, a finding that should guide future observational efforts.

scholarly journals On the Equilibria of Titanous Sulfate-Sulfuric Acid-Water System

1960 ◽  
Vol 80 (2) ◽  
pp. 236-239
Author(s):  
Masao Yamanaka ◽  
Yoshiko Hagihira ◽  
Yasaburo Akazawa
Keyword(s):  
Sulfuric Acid ◽  
Water System ◽  
Acid Water
Sign in / Sign up

Export Citation Format

Share Document