globalchange  > 气候变化事实与影响
Scopus记录号: 2-s2.0-85061719338
论文题名:
Detection and attribution of upper-tropospheric warming over the tropical western Pacific
作者: Li Y.; Yang S.; Deng Y.; Hu X.; Cai M.; Zhou W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
语种: 英语
英文关键词: Attribution analyses ; Long-term change ; The tropical western Pacific ; The upper-tropospheric warming
英文摘要: Both model and satellite observations suggest that the warming in the tropical upper troposphere is more pronounced than in the lower troposphere. This study describes the tropical upper-tropospheric-warming (UTW) in the ECMWF Reanalysis Interim dataset, and reveals radiative and non-radiative processes contributing to the long-term change in UTW. The maximum intensity of the UTW is found between 250 and 400 hPa with a warming rate about 3K/decade over the tropical Atlantic and western Pacific oceans. The warming is more prominent from boreal winter to early spring than the rest of the year. In the tropical western Pacific, where the warmest ocean water resides, the long-term change in the annual mean UTW is mainly contributed by the variations of atmospheric deep convection and the oceanic dynamical process and heat storage (Ocn) with the latter playing a more important role. The UTW caused by the deep convection is mainly through the latent heat release associated with enhanced upward motion and condensation. The UTW related to Ocn is mainly a result of enhanced upward long-wave radiation from the ocean surface due to the large heat storage in the thermocline. The variations in Ocn mainly contribute to the UTW from winter to early spring, while the changes in deep convection play a more essential role from summer to fall. Also shown by the differences in deep convection, a strengthening of the Walker circulation since the early 2000s is also found in the reanalysis, which is most apparent in boreal summer and fall over the tropical Pacific, facilitating the deep convection to dominate. © 2019, The Author(s).
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122533
Appears in Collections:气候变化事实与影响

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作者单位: School of Atmospheric Sciences, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, 510275, China; Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, China; Southern Laboratory of Ocean Science and Engineering, Sun Yat-sen University, Zhuhai, China; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; Department of Earth, Ocean, and Atmosphere Science, Florida State University, Tallahassee, FL, United States; School of Energy and Environment, City University of Hong Kong, Hong Kong

Recommended Citation:
Li Y.,Yang S.,Deng Y.,et al. Detection and attribution of upper-tropospheric warming over the tropical western Pacific[J]. Climate Dynamics,2019-01-01
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