FN Archimer Export Format
PT J
TI The Effect of Water-Column Resonance on the Spectra of Secondary Microseism P-waves
BT 
AF MESCHEDE, Matthias
   STUTZMANN, Eleonore
   FARRA, Veronique
   SCHIMMEL, Martin
   ARDHUIN, Fabrice
AS 1:1;2:1;3:1;4:2;5:3;
FF 1:;2:;3:;4:;5:;
C1 Inst Phys Globe Paris, Paris, France.
   CSIC, Inst Earth Sci Jaume Almera, Barcelona, Spain.
   Univ Brest, CNRS, Lab Oceanog Phys & Spatiale, IRD,Ifremer,IUEM, Brest, France.
C2 IPGP, FRANCE
   CSIC, SPAIN
   CNRS, FRANCE
UM LOPS
IF 3.482
TC 12
UR https://archimer.ifremer.fr/doc/00404/51517/52109.pdf
   https://archimer.ifremer.fr/doc/00404/51517/52110.pdf
LA English
DT Article
DE ;secondary microseisms;body waves;noise source spectra;ocean waves;site effect
AB We compile and analyze a dataset of secondary microseismic P-wave spectra that were observed by North American seismic arrays. Two distinct frequency bands, 0.13–0.15Hz and 0.19–0.21Hz, with enhanced P-wave energy characterize the dataset. Cluster analysis allows to classify the spectra and to associate typical spectral shapes with geographical regions: Low frequency dominated spectra (0.13-0.15Hz) are mostly detected in shallower regions of the North Atlantic and the South Pacific, as well as along the Central and South American Pacific coast. High frequency dominated spectra (0.19-0.21Hz) are mostly detected in deeper regions of the North-Western Pacific and the South Pacific. For a selected subset of high quality sources, we compute synthetic spectra from an ocean wave hindcast. These synthetic spectra are able to reproduce amplitude and shape of the observed spectra, but only if P-wave resonance in the water column at the source site is included in the model. Our datasets therefore indicate that the spectral peaks at 0.13-0.15Hz and 0.19-0.21 Hz correspond to the first and second harmonics of P-wave resonance in the water column that occur in shallower ocean depths (<3000m) and in the deep ocean (∼5000m), respectively. This article demonstrates the important effect of water column resonance on the amplitude and frequency of P-waves that are generated by secondary microseisms, and that the amplitude of high quality sources can be predicted from ocean wave hindcasts within a factor of 0.4 − 6. 
PY 2017
PD OCT
SO Journal Of Geophysical Research-solid Earth
SN 2169-9313
PU Amer Geophysical Union
VL 122
IS 10
UT 000418577900036
BP 8121
EP 8142
DI 10.1002/2017JB014014
ID 51517
ER

EF