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DOI | 10.1029/2019JD032119 |
Impact of Cloud Ice Particle Size Uncertainty in a Climate Model and Implications for Future Satellite Missions | |
Wang Y.; Su H.; Jiang J.H.; Xu F.; Yung Y.L. | |
发表日期 | 2020 |
ISSN | 2169897X |
卷号 | 125期号:6 |
英文摘要 | Ice particle size is pivotal to determining ice cloud radiative effect and precipitating rate. However, there is a lack of accurate ice particle effective radius (Rei) observation on the global scale to constrain its representation in climate models. In support of future mission design, here we present a modeling assessment of the sensitivity of climate simulations to Rei and quantify the impact of the proposed mission concept on reducing the uncertainty in climate sensitivity. We perturb the parameters pertaining to ice fall speed parameter and Rei in radiation scheme, respectively, in National Center for Atmospheric Research CESM1 model with a slab ocean configuration. The model sensitivity experiments show that a settling velocity increase due to a larger Rei results in a longwave cooling dominating over a shortwave warming, a global mean surface temperature decrease, and precipitation suppression. A similar competition between longwave and shortwave cloud forcing changes also exists when perturbing Rei in the radiation scheme. Linearity generally holds for the climate response for Rei related parameters. When perturbing falling snow particle size (Res) in a similar way, we find much less sensitivity of climate responses. Our quadrupling CO2 experiments with different parameter settings reveal that Rei and Res can account for changes in climate sensitivity significantly from +12.3% to −6.2%. By reducing the uncertainty ranges of Rei and Res from a factor of 2 to ±25%, a future satellite mission under design is expected to improve the climate state simulations and reduce the climate sensitivity uncertainty pertaining to ice particle size by approximately 60%. Our results highlight the importance of better observational constraints on Rei by satellite missions. ©2020. American Geophysical Union. All Rights Reserved. |
英文关键词 | climate modeling; climate sensitivity; ice clouds; ice effective radius |
语种 | 英语 |
来源期刊 | Journal of Geophysical Research: Atmospheres |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/186097 |
作者单位 | Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; School of Meteorology, University of Oklahoma, Norman, OK, United States |
推荐引用方式 GB/T 7714 | Wang Y.,Su H.,Jiang J.H.,et al. Impact of Cloud Ice Particle Size Uncertainty in a Climate Model and Implications for Future Satellite Missions[J],2020,125(6). |
APA | Wang Y.,Su H.,Jiang J.H.,Xu F.,&Yung Y.L..(2020).Impact of Cloud Ice Particle Size Uncertainty in a Climate Model and Implications for Future Satellite Missions.Journal of Geophysical Research: Atmospheres,125(6). |
MLA | Wang Y.,et al."Impact of Cloud Ice Particle Size Uncertainty in a Climate Model and Implications for Future Satellite Missions".Journal of Geophysical Research: Atmospheres 125.6(2020). |
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