Sonja Murto, PhD student at MISU.
Sonja Murto, PhD student at MISU.


Sonja Murto
PhD student at MISU


The impact of aerosols on the sensible and latent heat fluxes in Beijing (Aerosolernas inverkan på sensibla och latenta värmeflöden i Beijing)


In recent decades, rapid urbanization together with industrialization has led to an increase in anthropogenic emissions, resulting in high air pollution concentrations and poor air quality particularly in developing countries, such as in China. Due to both the enhanced environmental and severe public health risks poor air quality is causing and the climate impacts of aerosols, it is of great interest to study and understand aerosol particles and their impact on our surroundings. Aerosols affect the radiative properties of the atmosphere and the surface energy balance. The impact of aerosols on the surface radiative fluxes of the urban surface energy balance is widely known, but the impact on the turbulent energy fluxes, which are important components in the energy balance, has until now remained unclear. To extend the knowledge of aerosol impacts on all the energy balance components, a simple urban land surface model (SUEWS) during the period of 2006-2009 is used, together with aerosol data, Aerosol Optical Depth (AOD), received from an AERONET station located in Beijing. With the use of commonly measured meteorological variables together with parameters defined for the study area of 1 km radius around a meteorological tower, the components of the urban surface energy balance are simulated by the model.

In this seminar, I will shortly present my Master’s thesis I wrote at Helsinki University. I will be mainly focusing on the results and discussion related to the results, but also shortly present the methods and some background information. The aim of my study was to analyse how much aerosol particles can modify the different surface energy balance components, particularly focusing on the turbulent fluxes. This study highlights the importance of maintaining measurements of aerosol concentrations and characteristics of the pollutants over urban areas due to their influence not only on the radiative fluxes, but all the components of the surface energy balance, which can further alter the water circulation and give rise to other environmental risks.


Time and Place

Thursday June 14th, 14.15
Rossbysalen C609, Arrhenius Laboratory, 6th floor