Zobrazeno 1 - 10
of 177
pro vyhledávání: '"Richard C. Aster"'
Autor:
Yan Yang, Zhongwen Zhan, Martin Karrenbach, Auden Reid‐McLaughlin, Ettore Biondi, Douglas A. Wiens, Richard C. Aster
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 13, Pp n/a-n/a (2024)
Abstract The firn layer covers 98% of Antarctica's ice sheets, protecting underlying glacial ice from the external environment. Accurate measurement of firn properties is essential for assessing cryosphere mass balance and climate change impacts. Cha
Externí odkaz:
https://doaj.org/article/732a45c175fc47fbac13fa766fa4520a
Autor:
Douglas A. Wiens, Richard C. Aster, Andrew A. Nyblade, Peter D. Bromirski, Peter Gerstoft, Ralph A. Stephen
Publikováno v:
Geophysical Research Letters, Vol 51, Iss 7, Pp n/a-n/a (2024)
Abstract Ice shelves are assumed to flow steadily from their grounding lines to the ice front. We report the detection of ice‐propagating extensional Lamb (plate) waves accompanied by pulses of permanent ice shelf displacement observed by co‐loca
Externí odkaz:
https://doaj.org/article/a05f82536d464abb80a062443d152de4
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-15 (2023)
Abstract Ocean waves excite continuous globally observable seismic signals. We use data from 52 globally distributed seismographs to analyze the vertical component primary microseism wavefield at 14–20 s period between the late 1980s and August 202
Externí odkaz:
https://doaj.org/article/da9d3b44073a471fa52cea6691b08af2
Publikováno v:
Annals of Glaciology, Vol 63, Pp 137-142 (2022)
Antarctic firn presents an exotic seismological environment in which the behaviors of propagating waves can be significantly at odds with those in other Earth media. We present a condensed view of the nascent field of ambient noise seismology in Anta
Externí odkaz:
https://doaj.org/article/c33473de7631416fbc1e49001a59c846
Autor:
Michael G. Baker, Richard C. Aster, Douglas A. Wiens, Andrew Nyblade, Peter D. Bromirski, Peter Gerstoft, Ralph A. Stephen
Publikováno v:
Journal of Glaciology, Vol 67, Pp 58-74 (2021)
Observations of teleseismic earthquakes using broadband seismometers on the Ross Ice Shelf (RIS) must contend with environmental and structural processes that do not exist for land-sited seismometers. Important considerations are: (1) a broadband, mu
Externí odkaz:
https://doaj.org/article/dc4cbbeaba5f45968e61add8f780e6b2
Autor:
Michael G. Baker, Richard C. Aster, Robert E. Anthony, Julien Chaput, Douglas A. Wiens, Andrew Nyblade, Peter D. Bromirski, Peter Gerstoft, Ralph A. Stephen
Publikováno v:
Journal of Glaciology, Vol 65, Pp 912-925 (2019)
The Ross Ice Shelf (RIS) is host to a broadband, multimode seismic wavefield that is excited in response to atmospheric, oceanic and solid Earth source processes. A 34-station broadband seismographic network installed on the RIS from late 2014 throug
Externí odkaz:
https://doaj.org/article/c19e068fd6c146ebb36f9fff0dfd8585
Autor:
Erica M. Lucas, Andrew A. Nyblade, Andrew J. Lloyd, Richard C. Aster, Douglas A. Wiens, John Paul O'Donnell, Graham W. Stuart, Terry J. Wilson, Ian W. D. Dalziel, J. Paul Winberry, Audrey D. Huerta
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 2, Pp n/a-n/a (2021)
Abstract We have located 117 previously undetected seismic events mainly occurring between 2015 and 2017 that originated from glacial, tectonic, and volcanic processes in central West Antarctica using data recorded on Polar Earth Observing Network (P
Externí odkaz:
https://doaj.org/article/dc78b009d54e44f5a3790c0211496072
Autor:
ZHAO CHEN, PETER D. BROMIRSKI, PETER GERSTOFT, RALPH A. STEPHEN, DOUGLAS A. WIENS, RICHARD C. ASTER, ANDREW A. NYBLADE
Publikováno v:
Journal of Glaciology, Vol 64, Pp 730-744 (2018)
Ice shelves play an important role in buttressing land ice from reaching the sea, thus restraining the rate of grounded ice loss. Long-period gravity-wave impacts excite vibrations in ice shelves that can expand pre-existing fractures and trigger ice
Externí odkaz:
https://doaj.org/article/4670a4ece2544c488572411b813fe74e
Autor:
Derek L. Schutt, Robert W. Porritt, Clément Estève, Pascal Audet, Jeremy M. Gosselin, Andrew J. Schaeffer, Richard C. Aster, Jeffrey T. Freymueller, Joel F. Cubley
Publikováno v:
Journal of Geophysical Research: Solid Earth. 128
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4f713738c11a0e7e4d5856a7efaa8a0
https://doi.org/10.1029/2022jb025517
https://doi.org/10.1029/2022jb025517
Publikováno v:
Seismological Research Letters. 92:2866-2875
Recent studies have shown that the Antarctic cryosphere is sensitive to external disturbances such as tidal stresses or dynamic stresses from remote large earthquakes. In this study, we systematically examine evidence of remotely triggered microseism
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37d85223caad4ea65e7764c0009b9562
https://doi.org/10.1785/0220210027
https://doi.org/10.1785/0220210027