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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ghan, Steven J. Molina, Mario J. Wang, Minghuai Pan, Bowen Lin, Yun Jiang, Jonathan H. Wang, Yuan Zhang, Renyi Hu, Jiaxi Levy, Misti |
| Spatial Coverage | Pacific Ocean |
| Description | Author Affiliation: Wang Y ( Department of Atmospheric Sciences, Texas A&M University, College Station, TX 77843); Wang M ( Pacific Northwest National Laboratory, Richland, WA 99354); Zhang R ( Department of Atmospheric Sciences, Texas A&M University, College Station, TX 77843); Ghan SJ ( Pacific Northwest National Laboratory, Richland, WA 99354); Lin Y ( Department of Atmospheric Sciences, Texas A&M University, College Station, TX 77843); Hu J ( Department of Atmospheric Sciences, Texas A&M University, College Station, TX 77843); Pan B ( Department of Atmospheric Sciences, Texas A&M University, College Station, TX 77843); Levy M ( Department of Atmospheric Sciences, Texas A&M University, College Station, TX 77843); Jiang JH ( Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109); Molina MJ ( Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093 renyi-zhang@tamu.edu mjmolina@ucsd.edu.); |
| Abstract | Atmospheric aerosols affect weather and global general circulation by modifying cloud and precipitation processes, but the magnitude of cloud adjustment by aerosols remains poorly quantified and represents the largest uncertainty in estimated forcing of climate change. Here we assess the effects of anthropogenic aerosols on the Pacific storm track, using a multiscale global aerosol-climate model (GCM). Simulations of two aerosol scenarios corresponding to the present day and preindustrial conditions reveal long-range transport of anthropogenic aerosols across the north Pacific and large resulting changes in the aerosol optical depth, cloud droplet number concentration, and cloud and ice water paths. Shortwave and longwave cloud radiative forcing at the top of atmosphere are changed by -2.5 and +1.3 W m(-2), respectively, by emission changes from preindustrial to present day, and an increased cloud top height indicates invigorated midlatitude cyclones. The overall increased precipitation and poleward heat transport reflect intensification of the Pacific storm track by anthropogenic aerosols. Hence, this work provides, for the first time to the authors' knowledge, a global perspective of the effects of Asian pollution outflows from GCMs. Furthermore, our results suggest that the multiscale modeling framework is essential in producing the aerosol invigoration effect of deep convective clouds on a global scale. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 19 |
| Volume Number | 111 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2014-05-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Aerosols Chemistry Air Pollutants Atmosphere Climate Cyclonic Storms Models, Theoretical Pacific Ocean Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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