caa a22 4500 445800372 CHVBK 20180317145139.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00704-011-0436-6 doi (NATIONALLICENCE)springer-10.1007/s00704-011-0436-6 A modeling study of the effects of aerosols on clouds and precipitation over East Asia [Elektronische Daten] [Xiaodong Liu, Xiaoning Xie, Zhi-Yong Yin, Changhai Liu, Andrew Gettelman] The National Center for Atmospheric Research Community Atmosphere Model (version 3.5) coupled with the Morrison-Gettelman two-moment cloud microphysics scheme is employed to simulate the aerosol effects on clouds and precipitation in two numerical experiments, one representing present-day conditions (year2000) and the other the pre-industrial conditions (year1750) over East Asia by considering both direct and indirect aerosol effects. To isolate the aerosol effects, we used the same set of boundary conditions and only altered the aerosol emissions in both experiments. The simulated results show that the cloud microphysical properties are markedly affected by the increase in aerosols, especially for the column cloud droplet number concentration (DNC), liquid water path (LWP), and the cloud droplet effective radius (DER). With increased aerosols, DNC and LWP have been increased by 137% and 28%, respectively, while DER is reduced by 20%. Precipitation rates in East Asia and East China are reduced by 5.8% and 13%, respectively, by both the aerosol's second indirect effect and the radiative forcing that enhanced atmospheric stability associated with the aerosol direct and first indirect effects. The significant reduction in summer precipitation in East Asia is also consistent with the weakening of the East Asian summer monsoon, resulting from the decreasing thermodynamic contrast between the Asian landmass and the surrounding oceans induced by the aerosol's radiative effects. The increase in aerosols reduces the surface net shortwave radiative flux over the East Asia landmass, which leads to the reduction of the land surface temperature. With minimal changes in the sea surface temperature, hence, the weakening of the East Asian summer monsoon further enhances the reduction of summer precipitation over East Asia. Springer-Verlag, 2011 Liu Xiaodong SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 710075, Xi'an, China aut Xie Xiaoning SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 710075, Xi'an, China aut Yin Zhi-Yong SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 710075, Xi'an, China aut Liu Changhai National Center for Atmospheric Research, PO Box3000, 80307, Boulder, CO, USA aut Gettelman Andrew National Center for Atmospheric Research, PO Box3000, 80307, Boulder, CO, USA aut Theoretical and Applied Climatology Springer Vienna 106/3-4(2011-12-01), 343-354 0177-798X 106:3-4<343 2011 106 704 https://doi.org/10.1007/s00704-011-0436-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00704-011-0436-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Xiaodong SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 710075, Xi'an, China aut NATIONALLICENCE 700 1- Xie Xiaoning SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 710075, Xi'an, China aut NATIONALLICENCE 700 1- Yin Zhi-Yong SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 710075, Xi'an, China aut NATIONALLICENCE 700 1- Liu Changhai National Center for Atmospheric Research, PO Box3000, 80307, Boulder, CO, USA aut NATIONALLICENCE 700 1- Gettelman Andrew National Center for Atmospheric Research, PO Box3000, 80307, Boulder, CO, USA aut NATIONALLICENCE 773 0- Theoretical and Applied Climatology Springer Vienna 106/3-4(2011-12-01), 343-354 0177-798X 106:3-4<343 2011 106 704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer