Enthalpy balance theory unifies diverse glacier surge behaviour

Benn, Douglas I.; Hewitt, Ian J.; Luckman, Adrian

doi:10.1017/aog.2023.23

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Enthalpy balance theory unifies diverse glacier surge behaviour

Douglas I. Benn, Ian J. Hewitt, Adrian Luckman

Annals of Glaciology, Pages: 1 - 7

Swansea University Author: Adrian Luckman

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DOI (Published version): 10.1017/aog.2023.23

Abstract

It is commonly asserted that there are two distinct classes of glacier surges: slow, long-duration ‘Svalbard-type’ surges, triggered by a transition from cold- to warm-based conditions (thermal switching), and fast, shorter-duration ‘Alaska-type’ surges triggered by a reorganisation of the basal dra...

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Published in:	Annals of Glaciology
ISSN:	0260-3055 1727-5644
Published:	Cambridge University Press (CUP)
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa63226
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first_indexed	2023-05-24T10:45:39Z
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spelling	v2 63226 2023-04-21 Enthalpy balance theory unifies diverse glacier surge behaviour 008cb668b2671b653a88677f075799a9 0000-0002-9618-5905 Adrian Luckman Adrian Luckman true false 2023-04-21 SGE It is commonly asserted that there are two distinct classes of glacier surges: slow, long-duration ‘Svalbard-type’ surges, triggered by a transition from cold- to warm-based conditions (thermal switching), and fast, shorter-duration ‘Alaska-type’ surges triggered by a reorganisation of the basal drainage system (hydraulic switching). This classification, however, reflects neither the diversity of surges in Svalbard and Alaska (and other regions), nor the fundamental dynamic processes underlying all surges. We argue that enthalpy balance theory offers a framework for understanding the spectrum of glacier surging behaviours while emphasising their essential dynamic unity. In this paper, we summarise enthalpy balance theory, illustrate its potential to explain so-called ‘Svalbard-type’ and ‘Alaska-type’ surges using a single set of principles, and show examples of a much wider range of glacier surge behaviour than previously observed. We then identify some future directions for research, including strategies for testing predictions of the theory against field and remote sensing data, and priorities for numerical model development. Journal Article Annals of Glaciology 1 7 Cambridge University Press (CUP) 0260-3055 1727-5644 Glacier modelling, glacier surges, subglacial processes 0 0 0 0001-01-01 10.1017/aog.2023.23 http://dx.doi.org/10.1017/aog.2023.23 COLLEGE NANME Geography COLLEGE CODE SGE Swansea University Another institution paid the OA fee 2023-05-31T11:25:54.7195199 2023-04-21T16:05:14.8391053 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Douglas I. Benn 1 Ian J. Hewitt 2 Adrian Luckman 0000-0002-9618-5905 3 63226__27591__9da24e57a6854d5da42477b829f242e4.pdf 63226.pdf 2023-05-24T11:42:52.8956044 Output 2770070 application/pdf Version of Record true This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited. true eng http://creativecommons.org/licenses/by/4.0/
title	Enthalpy balance theory unifies diverse glacier surge behaviour
spellingShingle	Enthalpy balance theory unifies diverse glacier surge behaviour Adrian Luckman
title_short	Enthalpy balance theory unifies diverse glacier surge behaviour
title_full	Enthalpy balance theory unifies diverse glacier surge behaviour
title_fullStr	Enthalpy balance theory unifies diverse glacier surge behaviour
title_full_unstemmed	Enthalpy balance theory unifies diverse glacier surge behaviour
title_sort	Enthalpy balance theory unifies diverse glacier surge behaviour
author_id_str_mv	008cb668b2671b653a88677f075799a9
author_id_fullname_str_mv	008cb668b2671b653a88677f075799a9_***_Adrian Luckman
author	Adrian Luckman
author2	Douglas I. Benn Ian J. Hewitt Adrian Luckman
format	Journal article
container_title	Annals of Glaciology
container_start_page	1
institution	Swansea University
issn	0260-3055 1727-5644
doi_str_mv	10.1017/aog.2023.23
publisher	Cambridge University Press (CUP)
college_str	Faculty of Science and Engineering
hierarchytype
hierarchy_top_id	facultyofscienceandengineering
hierarchy_top_title	Faculty of Science and Engineering
hierarchy_parent_id	facultyofscienceandengineering
hierarchy_parent_title	Faculty of Science and Engineering
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/10.1017/aog.2023.23
document_store_str	1
active_str	0
description	It is commonly asserted that there are two distinct classes of glacier surges: slow, long-duration ‘Svalbard-type’ surges, triggered by a transition from cold- to warm-based conditions (thermal switching), and fast, shorter-duration ‘Alaska-type’ surges triggered by a reorganisation of the basal drainage system (hydraulic switching). This classification, however, reflects neither the diversity of surges in Svalbard and Alaska (and other regions), nor the fundamental dynamic processes underlying all surges. We argue that enthalpy balance theory offers a framework for understanding the spectrum of glacier surging behaviours while emphasising their essential dynamic unity. In this paper, we summarise enthalpy balance theory, illustrate its potential to explain so-called ‘Svalbard-type’ and ‘Alaska-type’ surges using a single set of principles, and show examples of a much wider range of glacier surge behaviour than previously observed. We then identify some future directions for research, including strategies for testing predictions of the theory against field and remote sensing data, and priorities for numerical model development.
published_date	0001-01-01T11:25:54Z
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Enthalpy balance theory unifies diverse glacier surge behaviour

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