气候变化领域集成服务门户(CCPortal): The building blocks of northern hemisphere wintertime stationary waves

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DOI	10.2196/10.1175/JCLI-D-19-0181.1
	The building blocks of northern hemisphere wintertime stationary waves
	Garfinkel C.I.; White I.; Gerber E.P.; Jucker M.; Erez M.
发表日期	2020
ISSN	0894-8755
起始页码	5611
结束页码	5633
卷号	33 期号:3
英文摘要	An intermediate-complexity moist general circulationmodel is used to investigate the forcing of stationary waves in theNorthernHemisphere boreal winter by land-sea contrast, horizontal heat fluxes in the ocean, and topography. The additivity of the response to these building blocks is investigated. In the Pacific sector, the stationary wave pattern is not simply the linear additive sum of the response to each forcing. In fact, over the northeast Pacific and western North America, the sum of the responses to each forcing is actually opposite to that when all three are imposed simultaneously due to nonlinear interactions among the forcings. The source of the nonlinearity is diagnosed using the zonally anomalous steady-state thermodynamic balance, and it is shown that the background-state temperature field set up by each forcing dictates the stationary wave response to the other forcings. As all three forcings considered here strongly impact the temperature field and its zonal gradients, the nonlinearity and nonadditivity in our experiments can be explained, but only in a diagnostic sense. This nonadditivity extends up to the stratosphere, and also to surface temperature, where the sum of the responses to each forcing differs from the response if all forcings are included simultaneously. Only over western Eurasia is additivity a reasonable (though not perfect) assumption; in this sector land-sea contrast is most important over Europe, while topography is most important over western Asia. In other regions, where nonadditivity is pronounced, the question of which forcing is most important is ill-posed. © 2020 American Meteorological Society.
英文关键词	Topography; Building blockes; Intermediate complexity; Nonlinear interactions; Northern Hemispheres; Stationary wave patterns; Stationary waves; Surface temperatures; Thermodynamic balance; Temperature; atmospheric general circulation model; heat flux; Northern Hemisphere; standing wave; stratosphere; surface temperature; thermodynamics; winter; Europe; North America; Pacific Ocean; Pacific Ocean (Northeast)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171241
作者单位	Fredy and Nadine Herrmann Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem, Israel; Courant Institute of Mathematical Sciences, New York University, New York City, NY, United States; Climate Change Research Center, ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, Australia
推荐引用方式 GB/T 7714	Garfinkel C.I.,White I.,Gerber E.P.,et al. The building blocks of northern hemisphere wintertime stationary waves[J],2020,33(3).
APA	Garfinkel C.I.,White I.,Gerber E.P.,Jucker M.,&Erez M..(2020).The building blocks of northern hemisphere wintertime stationary waves.Journal of Climate,33(3).
MLA	Garfinkel C.I.,et al."The building blocks of northern hemisphere wintertime stationary waves".Journal of Climate 33.3(2020).