| DOI: | 10.1175/JCLI-D-16-0864.1
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| Scopus记录号: | 2-s2.0-85025671502
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| 论文题名: | Eddy-driven jet sensitivity to diabatic heating in an idealized GCM |
| 作者: | Baker H.S.; Woollings T.; Mbengue C.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2017
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| 卷: | 30, 期:16 | | 起始页码: | 6413
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| 结束页码: | 6431
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| 语种: | 英语
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| Scopus关键词: | Jets
; Troposphere
; Anthropogenic climate changes
; Climate sensitivity
; Diabatic heating
; Idealized models
; Isentropic surfaces
; Sensitivity distributions
; Size and position
; Storm track
; Climate change
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| 英文摘要: | The eddy-driven jet is studied using a dry idealized model to determine its sensitivity to thermal forcings. The jet latitude, speed, and variability are investigated under a series of Gaussian patch thermal forcing simulations applied systematically on a latitude-sigma grid in the troposphere. This work builds on previous studies by isolating the responses of the jet speed and latitude as opposed to combining them into a single annular mode index. It also explores the sensitivity of the jet to much smaller spatial heatings rather than applying forcing patterns to simulate anthropogenic climate change, as the size and magnitude of the forcings due to anthropogenic climate change are uncertain. The jet speed and latitude are found to have different sensitivity distributions from each other, which also vary between summer and winter. A simple mechanistic understanding of these sensitivities is presented by considering how the individual thermal forcingsmodifymean isentropic surfaces. In the cases analyzed, the jet response to forcing scales approximately linearly with the strength of the forcing and when forcings are applied in combination. The findings show a rich latitude-pressure distribution of jet sensitivities to thermal forcings, which will aid interpretation of jet responses in a changing climate. Furthermore, they highlight the areas where uncertainty needs to be reduced in the size and position of expected anthropogenic forcings, in order that the uncertainty in changes of the eddy-driven jet can be reduced. © 2017 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/48791
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| Appears in Collections: | 气候减缓与适应
气候变化与战略
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作者单位: | Atmospheric, Oceanic and Planetary Physics, University of Oxford, Oxford, United Kingdom
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| Recommended Citation: | |
Baker H.S.,Woollings T.,Mbengue C.. Eddy-driven jet sensitivity to diabatic heating in an idealized GCM[J]. Journal of Climate,2017-01-01,30(16)
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