PPT-Constraining the aerosol indirect effect

Jón Egill Kristjánsson Univ Oslo Many thanks to Alf Kirkevåg metno Corinna Hoose Univ Oslo Leo Donner GFDL Problem Definition Most GCMs give an aerosol indirect effect which is too high compared to results from residual calculations . Orographic. Precipitation. William R Cotton. Dept of Atmospheric Science. Colorado State University. In the case of wintertime . orographic. clouds, we expect that increased concentrations of CCN will increase the cloud droplet number concentration, reduce cloud droplet diameters, reduce riming growth of ice, and thereby reduce precipitation. . That is, Indirect Effects. What is . a Mediator?. An intervening variable.. X causes M and then M causes Y.. MacKinnon et al., 2002. 14 different ways to test mediation models. Grouped into 3 general approaches. Implementation, Certification, and Testing (ICT) Workgroup. March 13, 2015. Sarah Corley, MD. David Kates. John Travis. Recommendations for Constraining CCDA. General Considerations. 2. Category.  . Robert Wood. University of Washington. Radiative. “forcing” components. Cloud effects. Direct . Twomey. Mixed ph.. Semi-dir 2. nd. AIE. t. cld. .  . N. d. eulerian. model WRF/. Chem. Paolo Tuccella, Gabriele Curci, . Suzanne. . Crumeyrolle. , Guido Visconti. Direct and . Indirect. aerosol . effects. Clean. Polluted. Direct . effect. Indirect. . effect. Aerosol-Cloud-Climate Interactions. . Spring Quarter 2015. Logistics. Class . webpage. . Class meets 1:30-2:50 Mondays and Wednesdays in Room 406, ATG Building. Instructor: . Riga, 12-13 April 2016. Type of indirect (negative) effects. What is the evidence by effect size and category of ALMPs ?. Content. Indirect effects of ALMPs/1 . The resources invested in the programme benefit individuals that would have been hired also in its absence. For example a training scheme targeting young graduates benefit . Robert Wood, Atmospheric Sciences,. University of Washington. Motivation. Aerosols can potentially influence earth’s radiation budget both by direct interaction with sunlight (aerosol . direct . effect), and also by altering cloud radiative properties (aerosol . the responses . of . low clouds . to . aerosols. Robert . Wood, Atmospheric . Sciences,. University of Washington. Motivation. Aerosol impacts on clouds are not simply explained by . Twomey’s. arguments. Mediation. In an intervening variable model, variable X, is postulated to exert an effect on an outcome variable, Y, through one or more intervening variables called . mediators . (M). “. mediational. . 1. ) . Satellite group, Max Planck institute for Chemistry, Mainz, Germany. 2) Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, China. 3) Belgian Institute for Space . of. aerosols over clouds . and. clear skies determined using CALIPSO . and. the A-Train. Robert Wood. , . Duli. . Chand. , Tad Anderson. University of Washington. VOCALS RF04, 21 November 2008. Effect of aerosol layer on TOA SW radiation. . Spring Quarter 2015. Logistics. Class . webpage. . Class meets 1:30-2:50 Mondays and Wednesdays in Room 406, ATG Building. Instructor: . Prof. . Robert . Wood . [ATG . 718, Phone . Tianle Yuan. . UMBC - GESTAR II. NASA Goddard Space Flight Center. Tianle Yuan @ MODIS/VIIRS STM 2023. 5/1/23. Tianle Yuan @ MODIS/VIIRS STM 2023. 2. Acknowledgement:. Co-authors: . . Hua Song.