Estimating Southern Ocean Storm Positions With Seismic Observations
Estimating Southern Ocean Storm Positions With Seismic Observations
复制标题
通过地震观测估计南大洋风暴位置
DOI:
10.1029/2019jc015898
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Crawford, Alex D.
中科院分区:
文献类型:
--
作者:
Hell, Momme C.;Gille, Sarah T.;Cornuelle, Bruce D.;Miller, Arthur J.;Bromirski, Peter D.;Crawford, Alex D.
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.
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影响因子:
5.2
作者:
Chen, Z.;Bromirski, P. D.;Gerstoft, P.;Stephen, R. A.;Lee, W. S.;Yun, S.;Olinger, S. D.;Aster, R. C.;Wiens, D. A.;Nyblade, A. A.
通讯作者:
Nyblade, A. A.
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
A. B. V. Bôas;S. Gille;M. Mazloff;B. Cornuelle
通讯作者:
B. Cornuelle
影响因子:
3.7
作者:
J. Miles
通讯作者:
J. Miles
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
K. Hodges;B. Hoskins;J. Boyle;C. Thorncroft
通讯作者:
C. Thorncroft
影响因子:
5.2
作者:
Kidston, J.;Taschetto, A. S.;England, M. H.
通讯作者:
England, M. H.