Staffordshire University logo
STORE - Staffordshire Online Repository

Discussion of ‘Field evidence and hydraulic modeling of a large Holocene jökulhlaup at Jökulsá á Fjöllum channel, Iceland’ by Douglas Howard, Sheryl Luzzadder-Beach and Timothy Beach, 2012

Carrivick, Jonathan L. and TWEED, Fiona S. and Carling, Paul and Alho, Petteri and Marren, Philip M. and Staines, Kate and Russell, Andrew J. and Rushmer, E. Lucy and Duller, Robert (2013) Discussion of ‘Field evidence and hydraulic modeling of a large Holocene jökulhlaup at Jökulsá á Fjöllum channel, Iceland’ by Douglas Howard, Sheryl Luzzadder-Beach and Timothy Beach, 2012. Geomorphology, 201. pp. 512-519. ISSN 0169555X

Full text not available from this repository.

Abstract or description

This paper discusses Howard et al. (2012) who reconstruct the peak discharge of a glacial outburst flood, or ‘jökulhlaup’, for part of the Jökulsá á Fjöllum in north-central Iceland. They propose that this flood was the largest on Earth. We consider that the magnitude of the jökulhlaup proposed by Howard et al. (2012) warrants much more robust field evidence and demands more carefully parameterised hydraulic modelling. For these reasons we firstly (i) present their study in the context of previous research (ii) highlight issues with attributing landforms and sediments to jökulhlaups, and (iii) consider uncertainty regarding the timing and magnitude of jökulhlaups along the Jökulsá á Fjöllum. We argue herein that whilst a range of landforms and sediments that are attributable to jökulhlaups can be observed along the Jökulsá á Fjöllum, these are not necessarily diagnostic of jökulhlaups. Secondly, we critically discuss (iv) the major underlying assumptions of their study, and (v) their calculations and subsequent interpretations. These assessments lead us to consider that the proposal by Howard et al. (2012) of the largest flood on Earth is highly unrealistic, especially when due consideration is given to a possible source area and a trigger mechanism.
Keywords

Jökulsá á Fjöllum;
Iceland;
Outburst flood;
Landscape;
Hydraulics

Item Type: Article
Subjects: F800 Physical and Terrestrial Geographical and Environmental Sciences
Depositing User: Fiona TWEED
Date Deposited: 11 Nov 2013 11:42
Last Modified: 11 Nov 2013 11:42
URI: http://eprints.staffs.ac.uk/id/eprint/1724

Actions (login required)

View Item View Item

DisabledGo Staffordshire University is a recognised   Investor in People. Sustain Staffs
Legal | Freedom of Information | Site Map | Job Vacancies
Staffordshire University, College Road, Stoke-on-Trent, Staffordshire ST4 2DE t: +44 (0)1782 294000