EGU2020-13479
https://doi.org/10.5194/egusphere-egu2020-13479
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Estimation of winter PM2.5 concentrations in East Asia associated with climate variability

Jaein Jeong1, Rokjin Park1, Sang-Wook Yeh2, and Joon-Woo Roh1
Jaein Jeong et al.
  • 1Seoul National University, Seoul, Korea, Republic of (ss99@snu.ac.kr)
  • 2Hanyang University, Seoul, Korea, Republic of

Interannual variability in large circulations associated with climate connections, such as monsoon and El Niño, have a significant impact on winter PM2.5 concentrations in East Asia. In this study, we use the global 3D chemical transport model (GEOS-Chem) over the last 35 years to investigate the relationship between major climate variability and winter PM2.5 concentrations in East Asia. First, the model is evaluated by comparing the simulated and observed aerosol concentrations with the ground and satellite-based aerosol concentrations. The results indicate that this model well reproduces the variability and magnitude of aerosol concentrations observed in East Asia. Sensitivity simulations are then used with fixed anthropogenic emissions to investigate the effects of meteorological variability on changes in aerosol concentrations in East Asia. The variability of winter PM2.5 concentrations in northern East Asia was found to be closely correlated with ENSO and Siberian high position. To predict PM2.5 concentrations using key climate indices, we develop multiple linear regression models. As a result, the predicted winter PM2.5 concentrations using the key climate index are well reproduced in the simulated PM2.5 concentrations, especially in northern East Asia.

How to cite: Jeong, J., Park, R., Yeh, S.-W., and Roh, J.-W.: Estimation of winter PM2.5 concentrations in East Asia associated with climate variability, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-13479, https://doi.org/10.5194/egusphere-egu2020-13479, 2020

This abstract will not be presented.