Analysis of cloud and precipitation chemistry at Whiteface Mountain, NY

Aleksic, Nenad; Roy, Karen M.; Sistla, Gopal; Dukett, James E.; Houck, Nathan; Casson, P.

doi:10.1016/j.atmosenv.2009.02.053

Cited by 65 publications

(58 citation statements)

References 22 publications

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“…2). Past studies also reported similar results in ion constituent (Aleksic et al, 2009;Klemm and Wrzesinsky, 2007;Mohnen and Kadlecek, 1989) because sulfates act as cloud condensation nuclei (Boucher and Lohmann, 1995).…”

Section: Fog Characteristicssupporting

confidence: 62%

Aerosol Deposition and Behavior on Leaves in Cool-temperate Deciduous Forests. Part 2: Characteristics of Fog Water Chemistry and Fog Deposition in Northern Japan

Yamaguchi¹,

Noguchi²,

Watanabe³

et al. 2013

Asian J. Atmos. Environ

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The fog water chemistry and deposition in northern Japan were investigated by fog water and throughfall measurements in 2010. Fog water was sampled weekly by an active-string fog sampler at Lake Mashu from May to November. Throughfall measurements were conducted using rain gauges under three deciduous trees along the somma of the lake from August to October. The mean fog deposition rate (flux) was calculated using throughfall data to estimate the total fog water deposition amount for the entire sampling period. NH 4 + + and SO 4 2-were the most abundant cation and anion, respectively, in the fog water samples. A mean pH of 5.08 in the fog water, which is higher than those in rural areas in Japan, was observed. The [NH 4 + + ]/[SO 4 2-] equivalent ratio in fog water was larger than 1.0 throughout the study period, indicating that NH 3 gas was the primary neutralizing agent for fog water acidity. The mean rate and total amount of fog water deposition were estimated as 0.15 mm h -1 and 164 mm, respectively. The amounts of nitrogen and sulfate deposition via fog water deposition were corresponded to those reported values of the annual deposition amounts via rainfall.

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Section: Fog Characteristicssupporting

confidence: 62%

Aerosol Deposition and Behavior on Leaves in Cool-temperate Deciduous Forests. Part 2: Characteristics of Fog Water Chemistry and Fog Deposition in Northern Japan

Yamaguchi¹,

Noguchi²,

Watanabe³

et al. 2013

Asian J. Atmos. Environ

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“…We expect the chemically relevant cloud water pH to be somewhat lower than the pH of precipitation reported by Cragin et al (1987), as precipitation is likely made up of larger, more dilute droplets than bulk cloud water. This is further supported by the correlation between pH and droplet size (Straub et al, 2007) and seasonally averaged measurements of both cloud droplet and precipitation pH, which show an offset of 0.7 ± 0.1 between the precipitation and cloud pH at Whiteface Mountain, NY (Aleksic et al, 2009). …”

Section: Model Limitationsmentioning

confidence: 50%

The impact of anthropogenic emissions on atmospheric sulfate production pathways, oxidants, and ice core Δ17O(SO42–)

2011

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Abstract. We use a global three-dimensional chemical transport model to quantify the influence of anthropogenic emissions on atmospheric sulfate production mechanisms and oxidant concentrations constrained by observations of the oxygen isotopic composition ( ). Additional model simulations are conducted to explore the sensitivity of the oxygen isotopic composition of sulfate to uncertainties in the preindustrial emissions of oxidant precursors.

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“…However, they can be altered by absorbing chemical components of soluble gases and further multiphase chemical reactions taking place in the cloud phase (Ravishankara, 1997). Non-precipitating clouds play a more crucial role in ion deposition and aggregation than precipitating clouds do (Aleksic et al, 2009). The concentrations of soluble compounds and dissolved acids have gener-ally been reported to be much higher in cloud liquid water compared with precipitation (Błaś et al, 2008;Zapletal et al, 2007;Zimmermann et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Chemical composition and droplet size distribution of cloud at the summit of Mount Tai, China

Li¹,

Wang²,

Chen³

et al. 2017

Atmos. Chem. Phys.

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Abstract. The chemical composition of 39 cloud samples and droplet size distributions in 24 cloud events were investigated at the summit of Mt. Tai from July to October 2014. Inorganic ions, organic acids, metals, HCHO, H 2 O 2 , sulfur(IV), organic carbon, and elemental carbon as well as pH and electrical conductivity were analyzed. The acidity of the cloud water significantly decreased from a reported value of pH 3.86 during (Guo et al., 2012 to pH 5.87 in the present study. The concentrations of nitrate and ammonium were both increased since 2007-2008, but the overcompensation of ammonium led to an increase in the mean pH value. The microphysical properties showed that cloud droplets were smaller than 26.0 µm and most were in the range of 6.0-9.0 µm at Mt. Tai. The maximum droplet number concentration (N d ) was associated with a droplet size of 7.0 µm. High liquid water content (LWC) values could facilitate the formation of larger cloud droplets and broadened the droplet size distribution. Cloud droplets exhibited a strong interaction with atmospheric aerosols. Higher PM 2.5 levels resulted in higher concentrations of water-soluble ions and smaller sizes with increased numbers of cloud droplets. The lower pH values were likely to occur at higher PM 2.5 concentrations. Clouds were an important sink for soluble materials in the atmosphere. The dilution effect of cloud water should be considered when estimating concentrations of soluble components in the cloud phase.

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Analysis of cloud and precipitation chemistry at Whiteface Mountain, NY

Cited by 65 publications

References 22 publications

Aerosol Deposition and Behavior on Leaves in Cool-temperate Deciduous Forests. Part 2: Characteristics of Fog Water Chemistry and Fog Deposition in Northern Japan

Aerosol Deposition and Behavior on Leaves in Cool-temperate Deciduous Forests. Part 2: Characteristics of Fog Water Chemistry and Fog Deposition in Northern Japan

The impact of anthropogenic emissions on atmospheric sulfate production pathways, oxidants, and ice core Δ<sup>17</sup>O(SO<sub>4</sub><sup>2–</sup>)

Chemical composition and droplet size distribution of cloud at the summit of Mount Tai, China

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Analysis of cloud and precipitation chemistry at Whiteface Mountain, NY

Cited by 65 publications

References 22 publications

Aerosol Deposition and Behavior on Leaves in Cool-temperate Deciduous Forests. Part 2: Characteristics of Fog Water Chemistry and Fog Deposition in Northern Japan

Aerosol Deposition and Behavior on Leaves in Cool-temperate Deciduous Forests. Part 2: Characteristics of Fog Water Chemistry and Fog Deposition in Northern Japan

The impact of anthropogenic emissions on atmospheric sulfate production pathways, oxidants, and ice core Δ&lt;sup&gt;17&lt;/sup&gt;O(SO&lt;sub&gt;4&lt;/sub&gt;&lt;sup&gt;2–&lt;/sup&gt;)

Chemical composition and droplet size distribution of cloud at the summit of Mount Tai, China

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The impact of anthropogenic emissions on atmospheric sulfate production pathways, oxidants, and ice core Δ<sup>17</sup>O(SO<sub>4</sub><sup>2–</sup>)