Universität zu Köln

May, Simon Matthias ORCID: 0000-0001-6762-7500, Brill, Dominik ORCID: 0000-0001-8637-4641, Leopold, Matthias ORCID: 0000-0003-0716-0093, Callow, John Nikolaus, Engel, Max ORCID: 0000-0002-2271-4229, Scheffers, Anja, Opitz, Stephan, Norpoth, Maike and Brueckner, Helmut (2017). Chronostratigraphy and geomorphology of washover fans in the Exmouth Gulf (NW Australia) - A record of tropical cyclone activity during the late Holocene. Quat. Sci. Rev., 169. S. 65 - 85. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0277-3791

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Abstract

Washover fans typically form due to barrier overwash or breaching and coastal inundation and generally represent geomorphological and depositional evidence of intense storms. Few studies have investigated the chronostratigraphy of washover fans in order to infer magnitude frequency patterns of extreme wave events over longer time scales. Here we present new data on the chronostratigraphy of late Holocene washover fans in the Exmouth Gulf (Western Australia) by using ground penetrating radar and unmanned aerial vehicle (UAV) survey techniques, as well as geomorphological, sedimentological and chronological investigations. This study aims to (i) provide a detailed characterization of the washover fans' geomorphology and stratigraphical architecture; (ii) document depositional processes involved in their formation; (iii) establish a chronostratigraphy based on optically stimulated luminescence (OSL); and (iv) understand the significance of the washover fans for recording past tropical cyclone (TC) activity. The fans consist of multiple sequences of sand, shell debris and coral rubble comprising depositional units related to TC-induced inundation. The units are separated by palaeosurfaces with incipient soil formation, formed during periods of reduced depositional activity. In combination with the interpretation of a UAV-based high-resolution digital surface model, multiple phases of reactivation are inferred. OSL results allow the establishment of a local long-term TC record and suggest storm-induced deposition at similar to 170, similar to 360, similar to 850 and similar to 1300 years ago. Further units were dated to similar to 1950, similar to 2300, and similar to 2850 years ago. The chronology of TC events is consistent with other work relating TC activity with El Nino Southern Oscillation (ENSO) and sea surface temperature (SST) patterns, corroborating the regional palaeotempestological relevance of this unique geomorphological record. (C) 2017 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code May, Simon Matthias UNSPECIFIED orcid.org/0000-0001-6762-7500 UNSPECIFIED Brill, Dominik UNSPECIFIED orcid.org/0000-0001-8637-4641 UNSPECIFIED Leopold, Matthias UNSPECIFIED orcid.org/0000-0003-0716-0093 UNSPECIFIED Callow, John Nikolaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Engel, Max UNSPECIFIED orcid.org/0000-0002-2271-4229 UNSPECIFIED Scheffers, Anja UNSPECIFIED UNSPECIFIED UNSPECIFIED Opitz, Stephan UNSPECIFIED UNSPECIFIED UNSPECIFIED Norpoth, Maike UNSPECIFIED UNSPECIFIED UNSPECIFIED Brueckner, Helmut UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-224482
DOI:	10.1016/j.quascirev.2017.05.023
Journal or Publication Title:	Quat. Sci. Rev.
Volume:	169
Page Range:	S. 65 - 85
Date:	2017
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	0277-3791
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EL-NINO/SOUTHERN-OSCILLATION; GROUND-PENETRATING RADAR; CLAST RIDGE SEQUENCES; HOUTMAN-ABROLHOS; SUITABLE ARCHIVES; OVERWASH DEPOSITS; NINGALOO REEF; BEACH RIDGES; STORM-SURGE; VARIABILITY Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22448