气候变化领域集成服务门户(CCPortal): The spring transition of the North Pacific jet and its relation to deep stratosphere-to-troposphere mass transport over western North America

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DOI	10.5194/acp-21-2781-2021
	The spring transition of the North Pacific jet and its relation to deep stratosphere-to-troposphere mass transport over western North America
	L. Breeden M.; H. Butler A.; R. Albers J.; Sprenger M.; O'Neil Langford A.
发表日期	2021
ISSN	1680-7316
起始页码	2781
结束页码	2794
卷号	21 期号:4
英文摘要	Stratosphere-to-troposphere mass transport to the planetary boundary layer (STT-PBL) peaks over the western United States during boreal spring, when deep stratospheric intrusions are most frequent. The tropopause-level jet structure modulates the frequency and character of intrusions, although the precise relationship between STT-PBL and jet variability has not been extensively investigated. In this study, we demonstrate how the North Pacific jet transition from winter to summer leads to the observed peak in STT-PBL. We show that the transition enhances STT-PBL through an increase in storm track activity which produces highly amplified Rossby waves and more frequent deep stratospheric intrusions over western North America. This dynamic transition coincides with the gradually deepening PBL, further facilitating STT-PBL in spring. We find that La Niña conditions in late winter are associated with an earlier jet transition and enhanced STT-PBL due to deeper and more frequent tropopause folds. An opposite response is found during El Niño conditions. El Niño-Southern Oscillation (ENSO) conditions also influence STT-PBL in late spring or early summer, during which time La Niña conditions are associated with larger and more frequent tropopause folds than both El Niño and ENSO-neutral conditions. These results suggest that knowledge of ENSO state and the North Pacific jet structure in late winter could be leveraged for predicting the strength of STT-PBL in the following months. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	air-sea interaction; El Nino-Southern Oscillation; jet stream; La Nina; mass transport; Rossby wave; spring (season); stratosphere-troposphere interaction; summer; North America; Pacific Ocean; Pacific Ocean (North)
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247118
作者单位	Noaa Chemical Sciences Laboratory, Boulder, CO 80305, United States; Noaa Physical Sciences Laboratory, Boulder, CO 80305, United States; Institute for Atmosphere and Climate Science, Eth Zürich, Zurich, Switzerland; Cooperative Institute for Research in the Environmental Sciences, University of Colorado Boulder, Boulder, CO 80305, United States
推荐引用方式 GB/T 7714	L. Breeden M.,H. Butler A.,R. Albers J.,et al. The spring transition of the North Pacific jet and its relation to deep stratosphere-to-troposphere mass transport over western North America[J],2021,21(4).
APA	L. Breeden M.,H. Butler A.,R. Albers J.,Sprenger M.,&O'Neil Langford A..(2021).The spring transition of the North Pacific jet and its relation to deep stratosphere-to-troposphere mass transport over western North America.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(4).
MLA	L. Breeden M.,et al."The spring transition of the North Pacific jet and its relation to deep stratosphere-to-troposphere mass transport over western North America".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.4(2021).