Dahlen, F. A. and Zhou, Ying (2006) Surface-wave group-delay and attenuation kernels. Geophysical Journal International, 165 (2). pp. 545-554. ISSN 0956-540X http://resolver.caltech.edu/CaltechAUTHORS:DAHjgi06
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We derive both 3-D and 2-D Fréchet sensitivity kernels for surface-wave group-delay and anelastic attenuation measurements. A finite-frequency group-delay exhibits 2-D off-ray sensitivity either to the local phase-velocity perturbation δc/c or to its dispersion ω(∂/∂ω)(δc/c) as well as to the local group-velocity perturbation δC/C. This dual dependence makes the ray-theoretical inversion of measured group delays for 2-D maps of δC/C a dubious procedure, unless the lateral variations in group velocity are extremely smooth.
|Additional Information:||© The authors Accepted 2005 December 23. Received 2005 October 26; in original form 2005 August 8 This work was motivated by enquiries from Guy Masters regarding group-delay kernels and from Colleen Dalton and Karen Fischer regarding anelastic attenuation kernels. If Geophysical Journal International gave an award for excellence in reviewing, we would enthusiastically nominate Mike Ritzwoller. Financial support has been provided by the US National Science Foundation under Grants EAR-0105387 and EAR-0113050. This is contribution No. 9122 of the Division of Geological and Planetary Sciences, California Institute of Technology.|
|Subject Keywords:||attenuation, Fréchet derivatives, global seismology, Q, sensitivity, surface waves|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Archive Administrator|
|Deposited On:||27 Jul 2006|
|Last Modified:||26 Dec 2012 08:57|
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