资源环境科技发展态势分析平台

The regime-dependence of aerosol-cloud interaction has recently been highlighted and explored using idealized cloud resolving models in previous studies. We further utilize synergistic observations from satellites and lidars to reinforce understandings of this interaction, and then examine and clarify the regime dependence of aerosol indirect effects. Results from regional satellite retrievals confirm that in clean conditions, the activation of cloud concentration nuclei, CCN is limited by the particle numbers whereas in polluted regimes updraft velocities play a crucial role. Also, warm rain suppression is significantly enhanced especially over inland areas. Similar evidence is provided by a lidar network over a more limited spatial domain. In polluted environments with heterogeneous deep convective cloud occurrence, turbulence-induced updrafts not only act as a dynamical condition for the increase of aerosol particles, but also alter the aerosol-cloud interaction into updraft-limited regime, making the activation of CCN more sensitive to the enhancement of updraft velocities.