P17     The evaluation of precipitation susceptibility from satellite and WRF-Chem model over Northeast Asia.

Park, Shin-Young, Hyo-Jung Lee, Hyun-Young Jo, Yu-Jin Jo, Geum-Hee Yang, Jong-Min Kim and Cheol-Hee Kim, Pusan National University, Republic of Korea

Northeast Asia emits large amounts of emissions. Specifically, the eastern regions of China, including Northeast, East, and Southeast China generate pollution composed of various emission components (Ohara et al., 2007; Li et al., 2014, 2017), and thus characteristics associated with the development of cloud water vary depending on aerosol components and polluted regions over Northeast Asia. Aerosol particles are well known to play a role in the earth-atmosphere system by altering the cloud microphysics and precipitation, referred to aerosol–cloud interactions or indirect effects (Twomey, 1977; Albrecht, 1989; Pincus and Baker, 1994; Haywood and Boucher, 2000; Rosenfeld et al., 2008). Numerous studies have attempted to understand and quantify the complexity in aerosol effects on clouds and precipitation. The precipitation susceptibility (So) quantifies how aerosol perturbations alter the magnitude of the precipitation rate (R) while minimizing the effects of macro-physical factors (Feingold and Siebert, 2009).
In this study, the CLAVR-x satellite data and the WRF-Chem model were used to evaluate the So over the domain of Northeast Asia. To examine the difference between model and satellite, the behavior of So as function of liquid water path (LWP), the relation of cloud droplet number concentration, and R for LWP were investigated through the WRF-Chem model. The results showed that the absolute value of So evaluated from WRF-Chem was higher than that from satellite data, and the shape of So behavior line from WRF-Chem was different to some extents compared to the results from satellite, indicating the requirements of further study for better cloud parameterization and model optimization over the Northeast Asia.