气候变化领域集成服务门户(CCPortal): Role of synoptic activity on projected changes in upwelling-favourable winds at the ocean’s eastern boundaries

CCPortal

DOI	10.1038/s41612-019-0101-9
	Role of synoptic activity on projected changes in upwelling-favourable winds at the ocean’s eastern boundaries
	Aguirre C.; Rojas M.; Garreaud R.D.; Rahn D.A.
发表日期	2019
ISSN	23973722
卷号	2 期号:1
英文摘要	The climate of the ocean’s eastern boundaries is strongly influenced by subtropical anticyclones, which drive a surface wind stress that promotes coastal upwelling of nutrient-rich subsurface water that supports high primary productivity and an abundance of food resources. Understanding the projected response of upwelling-favourable winds to climate change has broad implications for coastal biogeochemistry, ecology, and fisheries. Here we use a reanalysis, an ensemble of global climate simulations, and an objective algorithm to track anticyclones to investigate the projected changes in upwelling-favourable wind events at the California, Canary, Humboldt, and Benguela coastal upwelling systems. Except for the north Pacific, we find consistent poleward shifts of mean and upper percentile daily winds over the ocean basins. We propose that extratropical, synoptic-scale migratory anticyclones that force intense coastal upwelling events—which become more frequent at higher latitudes and less frequent at lower latitudes in the future—play an important role in the projected changes in upwelling-favourable wind events in these coastal upwelling systems. These changes complement large-scale processes such as the poleward shift of the subtropical ridge (STR) and stationary subtropical highs. Hence, both extratropical and tropical processes need to be considered to fully explain projected changes at the coastal upwelling systems under anthropogenic climate change. © 2019, The Author(s).
语种	英语
scopus关键词	anthropogenic effect; anticyclone; climate change; climate modeling; computer simulation; ensemble forecasting; extratropical environment; marine atmosphere; numerical model; synoptic meteorology; tropical environment; weather forecasting; wind field; wind stress; Angola; Benguela; California; Canada; Canary Islands; Humboldt; Saskatchewan; Spain; United States
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178076
作者单位	Centro de Ciencia del Clima y la Resiliencia, CR2, Santiago, Chile; Escuela de Ingeniería Civil Oceánica, Facultad de Ingeniería, Universidad de Valparaíso, Valparaíso, Chile; Centro de Observación Marino para estudios de Riesgos del ambiente costero, COSTAR, Valparaíso, Chile; Departamento de Geofísica, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago, Chile; Department of Geography and Atmospheric Science, University of Kansas, Lawrence, KS, United States
推荐引用方式 GB/T 7714	Aguirre C.,Rojas M.,Garreaud R.D.,等. Role of synoptic activity on projected changes in upwelling-favourable winds at the ocean’s eastern boundaries[J],2019,2(1).
APA	Aguirre C.,Rojas M.,Garreaud R.D.,&Rahn D.A..(2019).Role of synoptic activity on projected changes in upwelling-favourable winds at the ocean’s eastern boundaries.npj Climate and Atmospheric Science,2(1).
MLA	Aguirre C.,et al."Role of synoptic activity on projected changes in upwelling-favourable winds at the ocean’s eastern boundaries".npj Climate and Atmospheric Science 2.1(2019).