Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf
Abstract 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 through early 2017 produced continuous vibratio...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2019
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/jog.2019.64 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000649 |
id |
crcambridgeupr:10.1017/jog.2019.64 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/jog.2019.64 2024-09-15T17:41:42+00:00 Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf Baker, Michael G. Aster, Richard C. Anthony, Robert E. Chaput, Julien Wiens, Douglas A. Nyblade, Andrew Bromirski, Peter D. Gerstoft, Peter Stephen, Ralph A. 2019 http://dx.doi.org/10.1017/jog.2019.64 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000649 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 65, issue 254, page 912-925 ISSN 0022-1430 1727-5652 journal-article 2019 crcambridgeupr https://doi.org/10.1017/jog.2019.64 2024-08-07T04:03:15Z Abstract 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 through early 2017 produced continuous vibrational observations of Earth's largest ice shelf at both floating and grounded locations. We characterize temporal and spatial variations in broadband ambient wavefield power, with a focus on period bands associated with primary (10–20 s) and secondary (5–10 s) microseism signals, and an oceanic source process near the ice front (0.4–4.0 s). Horizontal component signals on floating stations overwhelmingly reflect oceanic excitations year-round due to near-complete isolation from solid Earth shear waves. The spectrum at all periods is shown to be strongly modulated by the concentration of sea ice near the ice shelf front. Contiguous and extensive sea ice damps ocean wave coupling sufficiently so that wintertime background levels can approach or surpass those of land-sited stations in Antarctica. Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Journal of Glaciology Ross Ice Shelf Sea ice Cambridge University Press Journal of Glaciology 65 254 912 925 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract 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 through early 2017 produced continuous vibrational observations of Earth's largest ice shelf at both floating and grounded locations. We characterize temporal and spatial variations in broadband ambient wavefield power, with a focus on period bands associated with primary (10–20 s) and secondary (5–10 s) microseism signals, and an oceanic source process near the ice front (0.4–4.0 s). Horizontal component signals on floating stations overwhelmingly reflect oceanic excitations year-round due to near-complete isolation from solid Earth shear waves. The spectrum at all periods is shown to be strongly modulated by the concentration of sea ice near the ice shelf front. Contiguous and extensive sea ice damps ocean wave coupling sufficiently so that wintertime background levels can approach or surpass those of land-sited stations in Antarctica. |
format |
Article in Journal/Newspaper |
author |
Baker, Michael G. Aster, Richard C. Anthony, Robert E. Chaput, Julien Wiens, Douglas A. Nyblade, Andrew Bromirski, Peter D. Gerstoft, Peter Stephen, Ralph A. |
spellingShingle |
Baker, Michael G. Aster, Richard C. Anthony, Robert E. Chaput, Julien Wiens, Douglas A. Nyblade, Andrew Bromirski, Peter D. Gerstoft, Peter Stephen, Ralph A. Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf |
author_facet |
Baker, Michael G. Aster, Richard C. Anthony, Robert E. Chaput, Julien Wiens, Douglas A. Nyblade, Andrew Bromirski, Peter D. Gerstoft, Peter Stephen, Ralph A. |
author_sort |
Baker, Michael G. |
title |
Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf |
title_short |
Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf |
title_full |
Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf |
title_fullStr |
Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf |
title_full_unstemmed |
Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf |
title_sort |
seasonal and spatial variations in the ocean-coupled ambient wavefield of the ross ice shelf |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/jog.2019.64 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000649 |
genre |
Antarc* Antarctica Ice Shelf Journal of Glaciology Ross Ice Shelf Sea ice |
genre_facet |
Antarc* Antarctica Ice Shelf Journal of Glaciology Ross Ice Shelf Sea ice |
op_source |
Journal of Glaciology volume 65, issue 254, page 912-925 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2019.64 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
254 |
container_start_page |
912 |
op_container_end_page |
925 |
_version_ |
1810487943129726976 |