气候变化领域集成服务门户(CCPortal): Estimating Southern Ocean Storm Positions With Seismic Observations

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DOI	10.1029/2019JC015898
	Estimating Southern Ocean Storm Positions With Seismic Observations
	Hell M.C.; Gille S.T.; Cornuelle B.D.; Miller A.J.; Bromirski P.D.; Crawford A.D.
发表日期	2020
ISSN	21699275
卷号	125 期号:4
英文摘要	Surface winds from Southern Ocean cyclones generate large waves that travel over long distances (>1,000 km). Wave generation regions are often colocated with enhanced air-sea fluxes and upper ocean mixing. Ocean wave spectra contain information about storm wind speed, fetch size, and intensity at their generation site. Two years of seismic observations on the Ross Ice shelf, combined with modern optimization (machine learning) techniques, are used to trace the origins of wave events in the Southern Ocean with an accuracy of ±110 km and ±2 hr from a hypothetical point source. The observed spectral energy attenuated within sea ice and in the ice shelf but retains characteristics that can be compared to parametric wave models. Comparison with the Modern-Era Retrospective Analysis for Research and Applications, Version 2, and ERA5 reanalyses suggests that less than 45% of ocean swell events can be associated with individual Southern Ocean storms, while the majority of the observed wave events cannot be matched with Southern Ocean high wind events. Reanalysis cyclones and winds are often displaced by about 350 km or 10 hr in Modern-Era Retrospective Analysis for Research and Applications, Version 2, and ERA5 compared to the most likely positions inferred from the seismic spectra. This high fraction of displaced storms in reanalysis products over the South Pacific can be explained by the limited availability of remote sensing observations, primarily caused by the presence of sea ice. Deviation of wave rays from their great circle path by wave-current interaction plays a minor role. ©2020. The Authors.
英文关键词	optimization; Ross Ice Shelf; sea ice; storms; surface winds; wave propagation
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186917
作者单位	Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; National Snow and Ice Data Center, Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Department of Earth Sciences, The College of Wooster, Wooster, OH, United States
推荐引用方式 GB/T 7714	Hell M.C.,Gille S.T.,Cornuelle B.D.,et al. Estimating Southern Ocean Storm Positions With Seismic Observations[J],2020,125(4).
APA	Hell M.C.,Gille S.T.,Cornuelle B.D.,Miller A.J.,Bromirski P.D.,&Crawford A.D..(2020).Estimating Southern Ocean Storm Positions With Seismic Observations.Journal of Geophysical Research: Oceans,125(4).
MLA	Hell M.C.,et al."Estimating Southern Ocean Storm Positions With Seismic Observations".Journal of Geophysical Research: Oceans 125.4(2020).