On the Caltech Active Strand Cloudwater Collectors

Demoz, Belay; Collett, Jeff; Daube, Bruce C.

doi:10.1016/0169-8095(95)00044-5

Cited by 186 publications

(141 citation statements)

References 14 publications

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“…Fog samples were collected using Caltech Active Strand Cloud water Collector (CASCC2; Demoz et al, 1996;Collett et al, 2008). After reviewing different standard methods for dew water collection (Nilsson, 1996;Takenaka et al, 1999;Beysens et al, 2003;Rubio et al, 2002;Sharan et al, 2007;Rubio et al, 2008), dew samples were collected using pre-cleaned CRSQ-0.25 OPUR Dew Condenser (Beysens et al, 2003(Beysens et al, , 2006.…”

Section: Sampling Detailsmentioning

confidence: 99%

A Comparative Study on Fog and Dew Water Chemistry at New Delhi, India

Nath

Yadav

2018

Aerosol Air Qual. Res.

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Fog and dew, formed via different formation mechanisms, are suitable to study the liquid-gas-solid phase chemical interactions in the ambient atmosphere. A total of 24 fog and 19 dew samples were collected using Caltech Active Strand Cloud water Collector 2 and dew condensers, respectively, over New Delhi during winter months of 2014-15 and were characterised for pH and soluble inorganic ion using ion chromatograph. Dew samples were alkaline (pH = 6.26 ± 0.37) in comparison to natural rainwater pH of 5.6 and fog collected at rooftop (pH = 5.38 ± 1.3) and at ground level (pH = 5.96 ± 0.3). The volume weighted mean equivalents of cations followed the order NH ) and dew (Ca 2+ > NH 4 + > Mg 2+ ). The differences in the fog and dew composition are primarily linked to their formation processes.The agricultural fields and fossil fuel combustion were sources for ammonium, sulphates, nitrate and nitrite whereas locally resuspended crustal materials added calcium and magnesium carbonates. Vehicular and plant emissions, biomass burning and the oxidation of volatile organic compounds seems to be responsible for higher organic acids in dew and fog.

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Section: Sampling Detailsmentioning

confidence: 99%

A Comparative Study on Fog and Dew Water Chemistry at New Delhi, India

Nath

Yadav

2018

Aerosol Air Qual. Res.

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“…This singlestage collector (Al-CASCC2) samples bulk cloud water representative of the entire drop size distribution (Demoz et al 1996). Samples were collected for each monitored cloud event (1 to 4 h) in eight events.…”

Section: Sampling and Analysis Of Cloud Watermentioning

confidence: 99%

Chemical Composition of Cloud Water in the Puerto Rican Tropical Trade Wind Cumuli

Gioda

Mayol-Bracero

Morales-García

et al. 2008

Water Air Soil Pollut

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As part of the Rain In Cumulus over the Ocean Experiment (RICO) and the Puerto Rico Aerosol and Cloud Study (PRACS), cloud water was collected at East Peak (EP) in Puerto Rico. The main objective of this study was to determine the concentrations of water-soluble species (Cl liquid phase concentrations of all inorganic substances were similar to those found in clouds in other clean maritime environments.

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“…Fog composition was measured using a compact version of the Caltech Active Strand Cloudwater Collector known as the CASCC2 (Demoz et al, 1996). Eight major fog events were captured during the 14-month baseline study period and are listed in Table 6.…”

Section: Article In Pressmentioning

confidence: 99%

Pittsburgh air quality study overview

Wittig

Anderson

Khlystov

et al. 2004

Atmospheric Environment

112

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Ambient sampling for the Pittsburgh Air Quality Study (PAQS) was conducted from July 2001 to September 2002. The study was designed (1) to characterize particulate matter (PM) by examination of size, surface area, and volume distribution, chemical composition as a function of size and on a single particle basis, morphology, and temporal and spatial variability in the Pittsburgh region; (2) to quantify the impact of the various sources (transportation, power plants, biogenic sources, etc.) on the aerosol concentrations in the area; and (3) to develop and evaluate the next generation of atmospheric aerosol monitoring and modeling techniques. The PAQS objectives, study design, site descriptions and routine and intensive measurements are presented. Special study days are highlighted, including those associated with elevated concentrations of daily average PM 2.5 mass. Monthly average and diurnal patterns in aerosol number concentration, and aerosol nitrate, sulfate, elemental carbon, and organic carbon concentrations, light scattering as well as gas-phase ozone, nitrogen oxides, and carbon monoxide are discussed with emphasis on the processes affecting them. Preliminary findings reveal day-to-day variability in aerosol mass and composition, but consistencies in seasonal average diurnal profiles and concentrations. For example, the seasonal average variations in the diurnal PM 2.5 mass were predominately driven by the sulfate component. r

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On the Caltech Active Strand Cloudwater Collectors

Cited by 186 publications

References 14 publications

A Comparative Study on Fog and Dew Water Chemistry at New Delhi, India

A Comparative Study on Fog and Dew Water Chemistry at New Delhi, India

Chemical Composition of Cloud Water in the Puerto Rican Tropical Trade Wind Cumuli

Pittsburgh air quality study overview

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