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.