气候变化领域集成服务门户(CCPortal): Subsurface Evolution and Persistence of Marine Heatwaves in the Northeast Pacific

CCPortal

DOI	10.1029/2020GL090548
	Subsurface Evolution and Persistence of Marine Heatwaves in the Northeast Pacific
	Scannell H.A.; Johnson G.C.; Thompson L.; Lyman J.M.; Riser S.C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	The reappearance of a northeast Pacific marine heatwave (MHW) sounded alarms in late summer 2019 for a warming event on par with the 2013–2016 MHW known as The Blob. Despite these two events having similar magnitudes in surface warming, differences in seasonality and salinity distinguish their evolutions. We compare and contrast the ocean's role in the evolution and persistence of the 2013–2016 and 2019–2020 MHWs using mapped temperature and salinity data from Argo floats. An unusual near-surface freshwater anomaly in the Gulf of Alaska during 2019 increased the stability of the water column, preventing the MHW from penetrating deep as strongly as the 2013–2016 event. This freshwater anomaly likely contributed to the intensification of the MHW by increasing the near-surface buoyancy. The gradual buildup of subsurface heat content throughout 2020 in the region suggests the potential for persistent ecological impacts. © 2020. The Authors.
英文关键词	Water; Argo float; Ecological impacts; Gulf of Alaska; Heatwaves; Near surfaces; Seasonality; Surface warming; Water columns; Hydrographic surveys; Argo; buoyancy; freshwater input; sea surface salinity; sea surface temperature; seasonality; subsurface flow; temperature anomaly; Gulf of Alaska; Pacific Ocean; Pacific Ocean (Northeast)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169330
作者单位	School of Oceanography, University of Washington, Seattle, WA, United States; Pacific Marine Environmental Laboratory, NOAA, Seattle, WA, United States; Joint Institute for Marine and Atmospheric Research, University of Hawai‘i at Mānoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Scannell H.A.,Johnson G.C.,Thompson L.,et al. Subsurface Evolution and Persistence of Marine Heatwaves in the Northeast Pacific[J],2020,47(23).
APA	Scannell H.A.,Johnson G.C.,Thompson L.,Lyman J.M.,&Riser S.C..(2020).Subsurface Evolution and Persistence of Marine Heatwaves in the Northeast Pacific.Geophysical Research Letters,47(23).
MLA	Scannell H.A.,et al."Subsurface Evolution and Persistence of Marine Heatwaves in the Northeast Pacific".Geophysical Research Letters 47.23(2020).