10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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Temporal Variability of Fine Particle Liquid Water Content over a National Park in Central India
SAMRESH KUMAR, Ramya Sunder Raman, Indian Institute of Science Education and Research, Bhopal
Abstract Number: 1127 Working Group: Aerosol Chemistry
Abstract Aerosol liquid phase water (ALW) is an important component of ambient aerosols. Water condensed on aerosols promotes heterogeneous chemical reactions along with obscuring the visibility, altering the hydrological cycle and influencing regional climate. It also influences the atmosphere-biosphere interactions, transport, atmospheric processing and fate of trace species. ALW is dependent on relative humidity, temperature, aerosol composition and concentration.
This work focuses on understanding the impacts of relative humidity, temperature, aerosol composition and concentrations on ALW for different time scales. 12 hour integrated samples (PM2.5) were collected over a National Park in Central India for two years (2012-2013, N=329; day and night) on multiple filter substrates using co-located Mini-VolTM samplers. Onsite metrological parameters were also recorded using Vaisala WXT-520 sensors. Water soluble inorganic ions in PM2.5 were determined using Ion Chromatography while organic and elemental carbon were determined using the DRI Thermal Optical Transmittance/Reflectance analyzer. Inorganic ions along with metrological parameters (relative humidity, temperature) were used to calculate the ALW content. Results of ALW content calculated using the Extended Aerosol Inorganic Model (E-AIM) and κ-Köhler theory (organic particle water) will be presented.