气候变化领域集成服务门户(CCPortal): Recent trends in the wind-driven California current upwelling system

CCPortal

DOI	10.1016/j.rse.2021.112486
	Recent trends in the wind-driven California current upwelling system
	Quilfen Y.; Shutler J.; Piolle J.-F.; Autret E.
发表日期	2021
ISSN	00344257
卷号	261
英文摘要	Long-term changes in the marine ecosystems of the Eastern Boundary Upwelling Systems (EBUS) are predicted due to anthropogenic climate change. In particular, global ocean acidification is having a profound effect on the coastal waters of the EBUS, affecting the entire trophic chain, net primary production (NPP) and related economic activities such as fisheries. Another predicted change related to human activity is that of upwelling dynamics with expected long-term changes in upwelling winds as proposed by Bakun (1990), Bakun et al. (2015) and Rykaczewski et al. (2015). Although these predicted long-term changes may emerge only later in the 21st century, this has fueled many studies using historical data. Long-term increase in upwelling winds has thus been a much debated topic, showing that there is considerable uncertainty depending on the EBUS considered, the effect of natural climate fluctuations, the choice of wind dataset, the time period considered, and the methodologies and significance tests applied. Therefore, there is an immediate interest in being able to monitor upwelling using verified and self-consistent wind data sets. This work focused on a sensitivity study of the estimated trends in upwelling winds in the California Current Upwelling System (CCUS), for the most recent period 1996–2018, using the two state-of-the-art satellite wind analyses and two atmospheric model re-analyses. Embedded into the strong modulation by natural climate fluctuations on interannual and decadal time scales, we do see an increase in upwelling-favorable winds in the core of the CCUS, with a local increase of more than 25% in seasonal upwelling transport for the period considered. In this central upwelling zone, a good agreement on stronger equatorward winds for the winter and spring seasons is found between the different datasets, although with different significance levels. Conversely, conflicting results are found in the southernmost part of the CCUS between the satellite analyses and the model reanalyses. Systematic, time-dependent differences are found between the wind products, highlighting the need to further investigate the poorly documented temporal stability of these widely used wind long-term climatology products. The observed spatial structuring of the estimated wind trends is consistent with the trend analysis of water chlorophyll-a, partial pressure of CO2, and basity (pH) analysis products. This result is consistent with changes being important for modulating the carbonate system within the CCUS. © 2021 Elsevier Inc.
语种	英语
scopus关键词	Climate change; Climate models; Economics; Ecosystems; Statistical tests; Anthropogenic climate changes; California Current; Climate fluctuations; Coastal waters; Global ocean; Long-term changes; Ocean acidifications; Reanalysis; Recent trends; Upwelling systems; Wind; Varanidae
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178816
作者单位	IFREMER, Univ. Brest, CNRS, IRD, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, Brest, France; College of Life and Environmental Sciences, University of Exeter, Penryn, United Kingdom
推荐引用方式 GB/T 7714	Quilfen Y.,Shutler J.,Piolle J.-F.,et al. Recent trends in the wind-driven California current upwelling system[J],2021,261.
APA	Quilfen Y.,Shutler J.,Piolle J.-F.,&Autret E..(2021).Recent trends in the wind-driven California current upwelling system.Remote Sensing of Environment,261.
MLA	Quilfen Y.,et al."Recent trends in the wind-driven California current upwelling system".Remote Sensing of Environment 261(2021).