Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf
© The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Baker, M. G., Aster, R. C., Anthony, R. E., Chaput, J., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. Seasonal and...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Cambridge University Press
2019
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/25530 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/25530 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/25530 2023-05-15T13:48:31+02:00 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 A. Bromirski, Peter D. Gerstoft, Peter Stephen, Ralph A. 2019-09-30 https://hdl.handle.net/1912/25530 unknown Cambridge University Press https://doi.org/10.1017/jog.2019.64 Baker, M. G., Aster, R. C., Anthony, R. E., Chaput, J., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. (2019). Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf. Journal of Glaciology, 65(254), 912-925. https://hdl.handle.net/1912/25530 doi:10.1017/jog.2019.64 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Baker, M. G., Aster, R. C., Anthony, R. E., Chaput, J., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. (2019). Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf. Journal of Glaciology, 65(254), 912-925. doi:10.1017/jog.2019.64 Antarctic glaciology Ice shelves Seismology Article 2019 ftwhoas https://doi.org/10.1017/jog.2019.64 2022-10-29T22:57:20Z © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Baker, M. G., Aster, R. C., Anthony, R. E., Chaput, J., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf. Journal of Glaciology, 65(254), (2019): 912-925, doi:10.1017/jog.2019.64. 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. This research was supported by NSF grants PLR-1142518, 1141916, 1142126, 1246151 and 1246416. JC was additionally supported by Yates funds in the Colorado State University Department of Mathematics. PDB also received support from the California Department of Parks and Recreation, Division of Boating and Waterways under contract 11-106-107. We thank Reinhard Flick and Patrick Shore for their support during field work, Tom Bolmer in locating stations and preparing maps, and the US Antarctic ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Journal of Glaciology Ross Ice Shelf Sea ice Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Antarctic Ross Ice Shelf Journal of Glaciology 65 254 912 925 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
Antarctic glaciology Ice shelves Seismology |
spellingShingle |
Antarctic glaciology Ice shelves Seismology Baker, Michael G. Aster, Richard C. Anthony, Robert E. Chaput, Julien Wiens, Douglas A. Nyblade, Andrew A. Bromirski, Peter D. Gerstoft, Peter Stephen, Ralph A. Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf |
topic_facet |
Antarctic glaciology Ice shelves Seismology |
description |
© The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Baker, M. G., Aster, R. C., Anthony, R. E., Chaput, J., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf. Journal of Glaciology, 65(254), (2019): 912-925, doi:10.1017/jog.2019.64. 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. This research was supported by NSF grants PLR-1142518, 1141916, 1142126, 1246151 and 1246416. JC was additionally supported by Yates funds in the Colorado State University Department of Mathematics. PDB also received support from the California Department of Parks and Recreation, Division of Boating and Waterways under contract 11-106-107. We thank Reinhard Flick and Patrick Shore for their support during field work, Tom Bolmer in locating stations and preparing maps, and the US Antarctic ... |
format |
Article in Journal/Newspaper |
author |
Baker, Michael G. Aster, Richard C. Anthony, Robert E. Chaput, Julien Wiens, Douglas A. Nyblade, Andrew A. Bromirski, Peter D. Gerstoft, Peter Stephen, Ralph A. |
author_facet |
Baker, Michael G. Aster, Richard C. Anthony, Robert E. Chaput, Julien Wiens, Douglas A. Nyblade, Andrew A. 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 |
publishDate |
2019 |
url |
https://hdl.handle.net/1912/25530 |
geographic |
Antarctic Ross Ice Shelf |
geographic_facet |
Antarctic Ross Ice Shelf |
genre |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Journal of Glaciology Ross Ice Shelf Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Journal of Glaciology Ross Ice Shelf Sea ice |
op_source |
Baker, M. G., Aster, R. C., Anthony, R. E., Chaput, J., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. (2019). Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf. Journal of Glaciology, 65(254), 912-925. doi:10.1017/jog.2019.64 |
op_relation |
https://doi.org/10.1017/jog.2019.64 Baker, M. G., Aster, R. C., Anthony, R. E., Chaput, J., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. (2019). Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf. Journal of Glaciology, 65(254), 912-925. https://hdl.handle.net/1912/25530 doi:10.1017/jog.2019.64 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
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_ |
1766249382518194176 |