气候变化领域集成服务门户(CCPortal): Progress in Simulating the Quasi-Biennial Oscillation in CMIP Models

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DOI	10.1029/2019JD032362
	Progress in Simulating the Quasi-Biennial Oscillation in CMIP Models
	Richter J.H.; Anstey J.A.; Butchart N.; Kawatani Y.; Meehl G.A.; Osprey S.; Simpson I.R.
发表日期	2020
ISSN	2169897X
卷号	125 期号:8
英文摘要	The quasi-biennial oscillation (QBO) of the zonal mean zonal wind is the primary mode of variability in the tropical lower stratosphere. The QBO is characterized by alternating easterly westerly shear layers that descend down from ∼10 to 100 hPa. The QBO is also seen in lower stratospheric tropical temperature, water vapor, and ozone and affects tropospheric variability through various teleconnections. We examine here the progress in simulating the QBO in the Coupled Model Intercomparison Project (CMIP) models, more specifically in CMIP3, CMIP5, and CMIP6 models. We show that the number of models that are able to simulate the QBO has increased from 0 in CMIP3, to 5 in CMIP5, to 15 in CMIP6. While the number of models with an internally generated QBO has tripled from CMIP5 to CMIP6, the fidelity of the simulation averaged over the CMIP models has not improved. We show that CMIP5 and CMIP6 models represent the QBO period and latitudinal extent quite well; however the QBO amplitude is shifted upwards relative to observations resulting in large underestimation of QBO amplitude at all levels below 20 hPa. The underestimation of QBO amplitude in the lowermost stratosphere and lack of variations downward to the tropopause and below will likely impact the quality of teleconnections seen in the current generation Earth system models. ©2020. American Geophysical Union. All Rights Reserved.
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/186056
作者单位	Climate and Global Dynamics, National Center for Atmospheric Research, Boulder, CO, United States; Canadian Centre for Climate Modelling and Analysis (CCCma), Environment and Climate Change Canada, Victoria, BC, Canada; Met Office Hadley Centre, Exeter, United Kingdom; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan; National Centre for Atmospheric Science, Leeds, United Kingdom; Department of Physics, University of Oxford, Oxford, United Kingdom
推荐引用方式 GB/T 7714	Richter J.H.,Anstey J.A.,Butchart N.,et al. Progress in Simulating the Quasi-Biennial Oscillation in CMIP Models[J],2020,125(8).
APA	Richter J.H..,Anstey J.A..,Butchart N..,Kawatani Y..,Meehl G.A..,...&Simpson I.R..(2020).Progress in Simulating the Quasi-Biennial Oscillation in CMIP Models.Journal of Geophysical Research: Atmospheres,125(8).
MLA	Richter J.H.,et al."Progress in Simulating the Quasi-Biennial Oscillation in CMIP Models".Journal of Geophysical Research: Atmospheres 125.8(2020).