Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data

Jones, G. A.; G., A. M.; Kulessa, Bernd; Schimmel, M.; Berbellini, A.; Morelli, A.; Jones, Glenn

doi:10.1029/2023gl103673

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Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data

G. A. Jones

, A. M. G. Ferreira

, Bernd Kulessa

, M. Schimmel

, A. Berbellini

, A. Morelli, Glenn Jones

Geophysical Research Letters, Volume: 50, Issue: 15

Swansea University Authors: Bernd Kulessa , Glenn Jones

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DOI (Published version): 10.1029/2023gl103673

Abstract

Rayleigh wave ellipticity measurements from seismic ambient noise recorded on the Greenland Ice Sheet (GrIS) show complex and anomalous behaviour at wave periods sensitive to ice (T < 3–4 s). To understand these complex observations, we compare them with synthetic ellipticity measurements obtaine...

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Published in:	Geophysical Research Letters
ISSN:	0094-8276 1944-8007
Published:	American Geophysical Union (AGU) 2023
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa63708
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spelling	v2 63708 2023-06-26 Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data 52acda616e9f6073cbebf497def874c9 0000-0002-4830-4949 Bernd Kulessa Bernd Kulessa true false 7f3ed841381af3c71e3be0dda5e0543a Glenn Jones Glenn Jones true false 2023-06-26 SGE Rayleigh wave ellipticity measurements from seismic ambient noise recorded on the Greenland Ice Sheet (GrIS) show complex and anomalous behaviour at wave periods sensitive to ice (T < 3–4 s). To understand these complex observations, we compare them with synthetic ellipticity measurements obtained from synthetic ambient noise computed for various seismic velocity and attenuation models, including surface wave overtone effects. We find that in dry snow conditions within the interior of the GrIS, to first order the anomalous ellipticity observations can be explained by ice models associated with the accumulation and densification of snow into firn. We also show that the distribution of ellipticity measurements is strongly sensitive to seismic attenuation and the thermal structure of the ice. Our results suggest that Rayleigh wave ellipticity is well suited for monitoring changes in firn properties and thermal composition of the Greenland and Antarctic ice sheets in a changing climate. Journal Article Geophysical Research Letters 50 15 American Geophysical Union (AGU) 0094-8276 1944-8007 16 8 2023 2023-08-16 10.1029/2023gl103673 http://dx.doi.org/10.1029/2023gl103673 In Press 2023 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University G.A.J. is funded by the Sˆer Cymru II Program in Low Carbon Energy and the Environment (European Regional Development Fund and Welsh European Funding Office; Project number 80761-SU-SU093). A.M.G.F. is grateful to support from NERC grant NE/N011791/1. M.S. thanks SANIMS (RTI2018-095594-B-I00). This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No 101001601). 2023-09-05T11:25:47.1116466 2023-06-26T14:19:44.5917297 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography G. A. Jones 0000-0002-7691-332x 1 A. M. G. Ferreira 0000-0002-9492-6415 2 Bernd Kulessa 0000-0002-4830-4949 3 M. Schimmel 0000-0003-2601-4462 4 A. Berbellini 0000-0002-3372-123x 5 A. Morelli 6 Glenn Jones 7 63708__28371__85ab146139a14019b69728574c0cd1fa.pdf 63708VoR.pdf 2023-08-24T14:38:58.1249433 Output 2852787 application/pdf Version of Record true This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited true eng https://creativecommons.org/licenses/by/4.0/
title	Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data
spellingShingle	Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data Bernd Kulessa Glenn Jones
title_short	Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data
title_full	Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data
title_fullStr	Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data
title_full_unstemmed	Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data
title_sort	Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data
author_id_str_mv	52acda616e9f6073cbebf497def874c9 7f3ed841381af3c71e3be0dda5e0543a
author_id_fullname_str_mv	52acda616e9f6073cbebf497def874c9_*_Bernd Kulessa 7f3ed841381af3c71e3be0dda5e0543a_*_Glenn Jones
author	Bernd Kulessa Glenn Jones
author2	G. A. Jones A. M. G. Ferreira Bernd Kulessa M. Schimmel A. Berbellini A. Morelli Glenn Jones
format	Journal article
container_title	Geophysical Research Letters
container_volume	50
container_issue	15
publishDate	2023
institution	Swansea University
issn	0094-8276 1944-8007
doi_str_mv	10.1029/2023gl103673
publisher	American Geophysical Union (AGU)
college_str	Faculty of Science and Engineering
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hierarchy_top_title	Faculty of Science and Engineering
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department_str	School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
url	http://dx.doi.org/10.1029/2023gl103673
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description	Rayleigh wave ellipticity measurements from seismic ambient noise recorded on the Greenland Ice Sheet (GrIS) show complex and anomalous behaviour at wave periods sensitive to ice (T < 3–4 s). To understand these complex observations, we compare them with synthetic ellipticity measurements obtained from synthetic ambient noise computed for various seismic velocity and attenuation models, including surface wave overtone effects. We find that in dry snow conditions within the interior of the GrIS, to first order the anomalous ellipticity observations can be explained by ice models associated with the accumulation and densification of snow into firn. We also show that the distribution of ellipticity measurements is strongly sensitive to seismic attenuation and the thermal structure of the ice. Our results suggest that Rayleigh wave ellipticity is well suited for monitoring changes in firn properties and thermal composition of the Greenland and Antarctic ice sheets in a changing climate.
published_date	2023-08-16T11:25:48Z
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score	11.035634

Constraints on the Cryohydrological Warming of Firn and Ice in Greenland From Rayleigh Wave Ellipticity Data

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