气候变化领域集成服务门户(CCPortal): Near-Coastal Winter Waves From Microseisms

CCPortal

DOI	10.1029/2020GL089831
	Near-Coastal Winter Waves From Microseisms
	Bromirski P.D.; Flick R.E.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	Long-term coastal wave climate variability cannot be reliably assessed from relatively short duration buoy observations that began about 1980. Microseisms at double the wave frequency (DFM) provide a proxy record of coastal wave activity. Here, we show that winter (November to March) wave activity can be well characterized from near-coastal seismometer DFM observations, although extreme wave events are not consistently well reproduced. Reconstructed mean winter seismic significant wave height, sHs, determined using simultaneous seismic and buoy observations, closely track nearby buoy Hs over 1992–2017 winters. Buoy-measured mean winter short-period wave variability in the [0.1, 0.15] Hz band is also well reproduced. Generally lower sHs for high amplitude events, compared with offshore buoy Hs, suggests that DFM generation is closer to the coast where shore-reflected long-period opposing wave components are likely higher. These results indicate that digitized pre-1980 archived analog seismograms at near-coastal seismic stations can reliably characterize long-term wave climate changes and decadal variability. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Buoys; Climate change; Offshore oil well production; Buoy observations; Decadal variability; Extreme wave events; High amplitude events; Short durations; Significant wave height; Wave components; Wave frequencies; Seismology; climate variation; coastal zone; extreme event; long-term change; proxy climate record; reconstruction; seismograph; significant wave height; wave climate; winter
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/169712
作者单位	Scripps Institution of Oceanography, UCSD, La Jolla, CA, United States; California State Parks, Natural Resources Division and Division of Boating and Waterways, Sacramento, CA, United States
推荐引用方式 GB/T 7714	Bromirski P.D.,Flick R.E.. Near-Coastal Winter Waves From Microseisms[J],2020,47(18).
APA	Bromirski P.D.,&Flick R.E..(2020).Near-Coastal Winter Waves From Microseisms.Geophysical Research Letters,47(18).
MLA	Bromirski P.D.,et al."Near-Coastal Winter Waves From Microseisms".Geophysical Research Letters 47.18(2020).