气候变化领域集成服务门户(CCPortal): The role of transient eddies and diabatic heating in the maintenance of European heat waves: a nonlinear quasi-stationary wave perspective

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DOI	10.1007/s00382-021-05628-9
	The role of transient eddies and diabatic heating in the maintenance of European heat waves: a nonlinear quasi-stationary wave perspective
	Ma Q.; Franzke C.L.E.
发表日期	2021
ISSN	0930-7575
卷号	56 期号:2021-09-10
英文摘要	European heat waves result from large-scale stationary waves and have major impacts on the economy and mortality. However, the dynamical processes leading to and maintaining heat waves are still not well understood. Here we use a nonlinear stationary wave model (NSWM) to examine the role played by anomalous stationary waves and how they are forced during heat waves. For our study, we use the Japanese Reanalysis (JRA-55) data for the period 1958 through 2017. We show that the NSWM can successfully reproduce the main features of the observed anomalous stationary waves in the upper troposphere. Our results indicate that the dynamics of heat waves are nonlinear, and transient momentum fluxes are the primary drivers of the observed anomalous stationary waves. The contribution from orographic forcing is moderate and mainly through nonlinear interactions with diabatic heating. Further decomposition of the transients indicates that the high-frequency transient vorticity fluxes make dominant contributions. Furthermore, our results reveal that the response to heating located in the tropical Indian Ocean and the west Pacific region is primarily responsible for maintaining the observed anomalous stationary waves linked to European heat waves. This is confirmed by exploring the relationship between heat waves and the Indian Ocean Dipole strength. The heating in the mid-latitude and tropical Atlantic region plays a secondary role. Our results suggest that European heat waves are potentially predictable by considering the nonlinear effects involved in anomalous stationary waves and the heating sources in the nearby and remote tropical region. © 2021, The Author(s).
英文关键词	Diabatic heating; European heat waves; Nonlinear stationary waves; Transient eddies
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183308
作者单位	Meteorological Institute, University of Hamburg, Hamburg, Germany; School of Integrated Climate System Science, University of Hamburg, Hamburg, Germany; Center for Earth System Research and Sustainability, University of Hamburg, Hamburg, Germany; School of Engineering and Science, Jacobs University, Bremen, Germany
推荐引用方式 GB/T 7714	Ma Q.,Franzke C.L.E.. The role of transient eddies and diabatic heating in the maintenance of European heat waves: a nonlinear quasi-stationary wave perspective[J],2021,56(2021-09-10).
APA	Ma Q.,&Franzke C.L.E..(2021).The role of transient eddies and diabatic heating in the maintenance of European heat waves: a nonlinear quasi-stationary wave perspective.Climate Dynamics,56(2021-09-10).
MLA	Ma Q.,et al."The role of transient eddies and diabatic heating in the maintenance of European heat waves: a nonlinear quasi-stationary wave perspective".Climate Dynamics 56.2021-09-10(2021).