FN Archimer Export Format
PT J
TI How ocean waves rock the Earth: two mechanisms explain microseisms with periods 3 to 300 s
BT 
AF ARDHUIN, Fabrice
   GUALTIERI, Lucia
   STUTZMANN, Eleonore
AS 1:1,2;2:3;3:3;
FF 1:PDG-ODE-LOPS;2:;3:;
C1 IFREMER, Lab Oceanog Spatiale, Brest, France.
   CNRS Ifremer UBO IRD, Lab Phys Oceans, Brest, France.
   PRES Sorbonne Paris Cite, Inst Phys Globe, Paris, France.
C2 IFREMER, FRANCE
   CNRS, FRANCE
   IPG, FRANCE
SI BREST
SE PDG-ODE-LOPS
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
IF 4.212
TC 178
UR https://archimer.ifremer.fr/doc/00251/36219/34769.pdf
   https://archimer.ifremer.fr/doc/00251/36219/34770.pdf
LA English
DT Article
DE ;hum;infragravity waves;numerical model;microseisms
AB Microseismic activity, recorded everywhere on Earth, is largely due to ocean waves. Recent progress has clearly identified sources of microseisms in the most energetic band, with periods from 3 to 10 s. In contrast, the generation of longer-period microseisms has been strongly debated. Two mechanisms have been proposed to explain seismic wave generation: a primary mechanism, by which ocean waves propagating over bottom slopes generate seismic waves, and a secondary mechanism which relies on the nonlinear interaction of ocean waves. Here we show that the primary mechanism explains the average power, frequency distribution, and most of the variability in signals recorded by vertical seismometers, for seismic periods ranging from 13 to 300 s. The secondary mechanism only explains seismic motions with periods shorter than 13 s. Our results build on a quantitative numerical model that gives access to time-varying maps of seismic noise sources.
PY 2015
PD FEB
SO Geophysical Research Letters
SN 0094-8276
PU Amer Geophysical Union
VL 42
IS 3
UT 000351355600013
BP 765
EP 772
DI 10.1002/2014GL062782
ID 36219
ER

EF