气候变化领域集成服务门户(CCPortal): GISS Model E2.2: A Climate Model Optimized for the Middle Atmosphere—2. Validation of Large-Scale Transport and Evaluation of Climate Response

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DOI	10.1029/2020JD033151
	GISS Model E2.2: A Climate Model Optimized for the Middle Atmosphere—2. Validation of Large-Scale Transport and Evaluation of Climate Response
	Orbe C.; Rind D.; Jonas J.; Nazarenko L.; Faluvegi G.; Murray L.T.; Shindell D.T.; Tsigaridis K.; Zhou T.; Kelley M.; Schmidt G.A.
发表日期	2020
ISSN	2169897X
卷号	125 期号:24
英文摘要	Here we examine the large-scale transport characteristics of the new “Middle Atmosphere” NASA Goddard Institute for Space Studies (GISS) climate model (E2.2). First, we evaluate the stratospheric transport circulation in historical atmosphere-only simulations integrated with interactive trace gas and aerosol chemistry. Compared to lower vertical resolution model versions, E2.2 exhibits improved tropical ascent and older stratospheric mean ages that are more consistent with observed values. In the troposphere, poleward transport to the Arctic and interhemispheric mean ages in E2.2 are comparable to models participating in the Chemistry Climate Modeling Initiative. In addition to validating E2.2, we also assess its “transport sensitivity” using the coupled atmosphere-ocean abrupt 4xCO2 and transient 1%CO2 simulations submitted to the Coupled Model Intercomparison Project, Phase 6, along with a 2xCO2 simulation used to evaluate the linearity of the transport circulation's response to increased CO2. We show that decreases (increases) in a stratospheric mean age (idealized surface loss) tracer scale linearly with increased lower stratospheric upwelling, which also increases linearly with warming tropical sea surface temperatures (SSTs). Abrupt 2xCO2 and 4xCO2 experiments constrained with (fixed) pre-industrial SSTs are also used to quantify the relative importance of rapid adjustments versus SST feedbacks to the transport circulation responses in the model. Finally, sensitivity experiments are presented to illustrate the impact of changes in the convective parameterization on stratospheric transport. Published 2020. This article is a U.S. Government work and is in the public domain in the USA.
英文关键词	CMIP6 climate model; large-scale transport; middle atmosphere
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/185587
作者单位	NASA Goddard Institute for Space Studies, New York, NY, United States; Center for Climate Systems Research, Earth Institute, Columbia University, New York, NY, United States; Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY, United States; Nicholas School of the Environment, Duke University, Durham, NC, United States; SciSpace LLC, New York, NY, United States
推荐引用方式 GB/T 7714	Orbe C.,Rind D.,Jonas J.,等. GISS Model E2.2: A Climate Model Optimized for the Middle Atmosphere—2. Validation of Large-Scale Transport and Evaluation of Climate Response[J],2020,125(24).
APA	Orbe C..,Rind D..,Jonas J..,Nazarenko L..,Faluvegi G..,...&Schmidt G.A..(2020).GISS Model E2.2: A Climate Model Optimized for the Middle Atmosphere—2. Validation of Large-Scale Transport and Evaluation of Climate Response.Journal of Geophysical Research: Atmospheres,125(24).
MLA	Orbe C.,et al."GISS Model E2.2: A Climate Model Optimized for the Middle Atmosphere—2. Validation of Large-Scale Transport and Evaluation of Climate Response".Journal of Geophysical Research: Atmospheres 125.24(2020).