Physical Chemistry Seminar

Calendar
Department of Physics Calendar
Date
Wed, Apr 18, 2018 11:00 am - 12:00 pm
Location
Chemistry 0112 (Marker Seminar Room)

Description

Speaker: Akua Asa-Awuku, UMCP, Chemical and Biomolecular Engineering

Title: Why are Aerosols Important? Understanding the Links between Air Quality and Climate

Abstract: Aerosols, or particles, emitted into the air have adverse effects for regional air quality and health.  In addition, aerosols significantly impact earth’s climate and the hydrological cycle. They can directly reflect the amount of incoming solar radiation into space; by acting as cloud condensation nuclei (CCN), they can indirectly impact climate by affecting cloud albedo. Our current assessment of the interactions of aerosols and clouds is uncertain and parameters used to estimate cloud droplet formation in global climate models are not well constrained. Organic aerosols attribute much of the uncertainty in these estimates and are known to affect the ability of aerosol to form cloud droplets by i) providing solute, thus reducing the equilibrium water vapor pressure of the droplet and ii) acting as surfactants capable of depressing surface tension, and potentially, growth kinetics. Understanding the chemical and thermodynamic properties that control the ability of particles to form droplets, CCN activity, and droplet growth are necessary for constraining impacts on the hydrological cycle and uncertainties from the aerosol indirect effect.  In particular, quantifying organic effects that are not well understood are important for predicting water uptake, CCN concentrations and cloud droplet formation.   In this presentation, we explore and identify parameters that affect droplet growth and discuss the links between cloud formation and air quality.

Upcoming Events

Apr
25

Wed, Apr 25, 2018 11:00 am - 12:00 pm

Apr
25

Wed, Apr 25, 2018 3:00 pm - 4:00 pm

Apr
25

Wed, Apr 25, 2018 4:00 pm - 5:30 pm

Apr
26

Thu, Apr 26, 2018 12:30 pm - 1:30 pm

Apr
26

Thu, Apr 26, 2018 3:30 pm - 4:30 pm

Apr
27

Fri, Apr 27, 2018 11:00 am - 12:15 pm

Apr
27

Fri, Apr 27, 2018 1:00 pm - 2:00 pm

Apr
27

Fri, Apr 27, 2018 4:00 pm - 4:40 pm

Apr
27

Fri, Apr 27, 2018 4:00 pm - 5:00 pm