Show simple item record

dc.contributor.authorArran, Matthew
dc.contributor.authorVriend, Nathalie
dc.contributor.authorMuyzert, E
dc.date.accessioned2018-09-11T17:31:22Z
dc.date.available2018-09-11T17:31:22Z
dc.date.issued2018-07
dc.identifier.issn2169-9313
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/280174
dc.description.abstractGround roll is a significant source of noise in land seismic data, with crossline scattered ground roll particularly difficult to suppress. This noise arises from surface heterogeneities lateral to the receiver spread, and in desert regions sand dunes are a major contributor. However, the nature of this noise is poorly understood, preventing the design of more effective data acquisition or processing techniques. Here, we present numerical simulations demonstrating that a barchan sand dune acts as a resonator, absorbing energy from ground roll and reemitting it over an extensive period of time. We derive and validate a mathematical framework that quantitatively describes the properties of the emitted waves, and demonstrate that wave amplitude is estimable from easily‐measurable bulk properties of the dune. Having identified regions in time, space, and frequency space at which noise will be more significant, we propose reducing dune‐scattered noise through careful survey design and data processing. In particular, we predict that seismic noise will be lower upwind of barchan dunes, and at frequencies far from a ‘resonant’ frequency 2cS/H, for dune height H and typical seismic velocity within the dune cS. This work is especially relevant to seismic acquisition in the vicinity of a dune field, where scattered noise appears incoherent and difficulties arise with alternative approaches to noise suppression.
dc.description.sponsorshipThis work was performed at Schlumberger Cambridge Research, where M. I. Arran was a CASE Student/Intern and E. Muyzert is a Senior Research Scientist.
dc.publisherAmerican Geophysical Union (AGU)
dc.titleSeismic Ground Roll Absorption and Reemission by Sand Dunes
dc.typeArticle
prism.endingPage5689
prism.issueIdentifier7
prism.publicationDate2018
prism.publicationNameJournal of Geophysical Research: Solid Earth
prism.startingPage5675
prism.volume123
dc.identifier.doi10.17863/CAM.27542
dcterms.dateAccepted2018-05-29
rioxxterms.versionofrecord10.1029/2018JB015580
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-07-01
dc.contributor.orcidArran, Matthew [0000-0001-5711-1033]
dc.contributor.orcidVriend, Nathalie [0000-0002-1456-2317]
dc.contributor.orcidMuyzert, E [0000-0003-1941-4222]
dc.identifier.eissn2169-9356
rioxxterms.typeJournal Article/Review
pubs.funder-project-idNERC (1500911)
pubs.funder-project-idRoyal Society (RG130403)
pubs.funder-project-idNERC (NE/L002507/1)
cam.issuedOnline2018-07-05
rioxxterms.freetoread.startdate2019-01-01


Files in this item

Thumbnail
Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record