PPT-` 5/1/23 1 Strong Aerosol Indirect Forcing from Increasing Low-cloud Coverage

Tianle Yuan UMBC GESTAR II NASA Goddard Space Flight Center Tianle Yuan MODISVIIRS STM 2023 5123 Tianle Yuan MODISVIIRS STM 2023 2 Acknowledgement Coauthors Hua Song. Investigate how pollution interacts with storm clouds and the impacts on the large-scale circulation and radiative forcing.. Research. Used . high-resolution, . cloud-resolving model to simulate two different types of storm systems at a regional scale: warm summer thunderstorms in southeastern China and cool, windy frontal systems on the Great Plains of . Two key impacts. Cloud feedback. Response of clouds to increased CO. 2. Aerosol indirect effects (AIEs). Response of clouds to changes in aerosol particles. Cloud feedbacks. Uncertainty in cloud feedbacks is main source of uncertainty in climate sensitivity. SPECIFICS. OF STUDY. FINDINGS. Kohler,. 193. 6 (“The nucleus in and the growth of hygroscopic droplets”). Evaporate. 2kg of hoar-frost and . determined . Cl. content. ; used optics to . measure droplet size. . E. CHAM5-HAM. B. Croft. 1. , J.R. . . Pierce. 1. , R.V. Martin. 1,2. , C. Hoose. 3. , and U. Lohmann. 4. 1. Dalhouse University, Canada. 2. Harvard-Smithsonian Centre for Astrophysics, USA. 3. Karlsruhe Institute of Technology, Germany. 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: . Matthew Toohey. 1. Kirstin . Krüger. 1,2. , . Claudia . Timmreck. 3. , . Hauke . Schmidt. 3. 1 . GEOMAR. , Helmholtz Centre for Ocean Research Kiel, Germany. 2 . Now at . University . of Oslo, Norway. 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 . Jón. Egill . Kristjánsson. (Univ. Oslo). Many thanks to: Alf . Kirkevåg. (. met.no. ), . 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 – . 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. Contents Radiative Forcing of Climate Change . 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 . Elisabeth Andrews. CATCOS Workshop, June 2016. What is climate?. Climate is the average weather. The standard averaging time for climate is 30 years. “Weather is what you’re wearing, climate is what’s in your closet”. the Characterization of Clouds, Aerosols and the . Cryosphere. in Climate . Models. Parameterization development. How have changing forcing agents influenced sea ice over the last few decades?. How do improvements to process level representation influence our interpretation of that climate change?.