气候变化领域集成服务门户(CCPortal): Hidden heatwaves and severe coral bleaching linked to mesoscale eddies and thermocline dynamics

CCPortal

DOI	10.1038/s41467-022-35550-5
	Hidden heatwaves and severe coral bleaching linked to mesoscale eddies and thermocline dynamics
	Wyatt, Alex S. J.; Leichter, James J.; Washburn, Libe; Kui, Li; Edmunds, Peter J.; Burgess, Scott C.
发表日期	2023
EISSN	2041-1723
卷号	14 期号:1 页码:17
英文摘要	Hidden marine heatwaves, associated with ocean eddies that modulate undersea internal waves, threaten coastal ecosystems by driving unexpected sub-surface heating and severe coral bleaching and mortality across depths. The severity of marine heatwaves (MHWs) that are increasingly impacting ocean ecosystems, including vulnerable coral reefs, has primarily been assessed using remotely sensed sea-surface temperatures (SSTs), without information relevant to heating across ecosystem depths. Here, using a rare combination of SST, high-resolution in-situ temperatures, and sea level anomalies observed over 15 years near Moorea, French Polynesia, we document subsurface MHWs that have been paradoxical in comparison to SST metrics and associated with unexpected coral bleaching across depths. Variations in the depth range and severity of MHWs was driven by mesoscale (10s to 100s of km) eddies that altered sea levels and thermocline depths and decreased (2007, 2017 and 2019) or increased (2012, 2015, 2016) internal-wave cooling. Pronounced eddy-induced reductions in internal waves during early 2019 contributed to a prolonged subsurface MHW and unexpectedly severe coral bleaching, with subsequent mortality offsetting almost a decade of coral recovery. Variability in mesoscale eddy fields, and thus thermocline depths, is expected to increase with climate change, which, along with strengthening and deepening stratification, could increase the occurrence of subsurface MHWs over ecosystems historically insulated from surface ocean heating by the cooling effects of internal waves.
学科领域	Multidisciplinary Sciences
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS记录号	WOS:000935587000003
来源期刊	NATURE COMMUNICATIONS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/274028
作者单位	Hong Kong University of Science & Technology; University of California System; University of California San Diego; Scripps Institution of Oceanography; University of California System; University of California Santa Barbara; University of California System; University of California Santa Barbara; California State University System; California State University Northridge; State University System of Florida; Florida State University
推荐引用方式 GB/T 7714	Wyatt, Alex S. J.,Leichter, James J.,Washburn, Libe,et al. Hidden heatwaves and severe coral bleaching linked to mesoscale eddies and thermocline dynamics[J],2023,14(1):17.
APA	Wyatt, Alex S. J.,Leichter, James J.,Washburn, Libe,Kui, Li,Edmunds, Peter J.,&Burgess, Scott C..(2023).Hidden heatwaves and severe coral bleaching linked to mesoscale eddies and thermocline dynamics.NATURE COMMUNICATIONS,14(1),17.
MLA	Wyatt, Alex S. J.,et al."Hidden heatwaves and severe coral bleaching linked to mesoscale eddies and thermocline dynamics".NATURE COMMUNICATIONS 14.1(2023):17.