- Author and researcher in Geography with specialization in Climatology, Natural Hazards, and Tsunamiedit
Daytime fog at Maddens Plain along the Illawarra escarpment south of Sydney between 1975-1990 can be related either to expansive cooling of air directed onshore against the escarpment, or to cloud under conditions of convective... more
Daytime fog at Maddens Plain along the Illawarra escarpment south of Sydney between 1975-1990 can be related either to expansive cooling of air directed onshore against the escarpment, or to cloud under conditions of convective instability. Because of ground drainage, radiation fogs rarely persist into daytime. Principal component analysis of a suite of regional and local meteorological variables and fog parameters indicates that fog is related to the presence of macro-scale circulation, namely east coast lows, the passage of cold fronts or monsoonal intrusions of low pressure over the interior of New South Wales. The development and persistence of these lows are linked inseparably to the positioning and movement of anticyclonic cells across the continent. Surprisingly there appears to be little consistent relationship of either fog characteristics or the synoptic patterns favouring fog formation to phases of the Southern Oscillation.
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The Tura mega-tsunami event documented from bedrock erosion and deposits on the southeast coast of Australia is not related to the Lanai tsunami events in Hawaii ca 105 ka. Instead, it forms the most recent cosmogenic mega-tsunami event... more
The Tura mega-tsunami event documented from bedrock erosion and deposits on the southeast coast of Australia is not related to the Lanai tsunami events in Hawaii ca 105 ka. Instead, it forms the most recent cosmogenic mega-tsunami event evident along 600 km of coast with a probable date of 1500±85 AD. The tsunami wave approached Tura Point from the northeast, whereas 100 km northwards the direction of approach was reversed. A similar age from tsunami deposits in New Zealand facing the Pacific Ocean and at Kauai, Hawaii 7300 km to the north implies that the comet/meteorite producing the Tura event struck further east, in the Southwest Pacific Ocean. Maori legends dating around the same time support a meteorite or comet impact. A secondary fragment striking the Tasman Sea north of Tura Point, New South Wales, Australia cannot be ruled out. The resulting mega-tsunami had major erosional and deposition impacts on mainland and island shorelines in the region.
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We consider various aspects of the link between solar-modulated geomagnetic activity and the Northern Annular Mode (NAM). Our results indicate that the geo-magnetic forcing of atmospheric circulation in the Northern Hemisphere is... more
We consider various aspects of the link between solar-modulated geomagnetic activity and the Northern Annular Mode (NAM). Our results indicate that the geo-magnetic forcing of atmospheric circulation in the Northern Hemisphere is temporally and seasonally restricted, modulated by the Quasi-Biennial Oscillation (QBO), and reliant on stratosphere-troposphere coupling. When the data are restricted to January values after 1965, for years in which the January QBO is eastwards, the correlation coefficient between the geomagnetic AA index and the NAM is 0.85. These results can account for many of the enigmatic features of Northern Hemisphere circulation.
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This updated new edition presents a comprehensive, inter-disciplinary analysis of the complete range of natural hazards. Edward Bryant describes and explains how hazards occur, examines prediction methods, considers recent and historical... more
This updated new edition presents a comprehensive, inter-disciplinary analysis of the complete range of natural hazards. Edward Bryant describes and explains how hazards occur, examines prediction methods, considers recent and historical hazard events and explores the social impact of such disasters. Supported by over 180 maps, diagrams and photographs, this standard text is an invaluable guide for students and professionals in the field. First Edition Hb (1991): 0-521-37295-X First Edition Pb (1991): 0-521-37889-3
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Remnants of the Last Interglacial shoreline occur at Middle Lagoon on the far south coast of New South Wales. Relict beach sediments can be traced to a height of at least +4.8 m and are indicative of a former mean sea level of about +3 m.... more
Remnants of the Last Interglacial shoreline occur at Middle Lagoon on the far south coast of New South Wales. Relict beach sediments can be traced to a height of at least +4.8 m and are indicative of a former mean sea level of about +3 m. Thermoluminescence (TL) ages of 126 ± 13 ka and 114 ± 15 ka were determined for beach and aeolian facies respectively. Sands in the lower part of an exposure on the adjacent Gillards Beach gave TL ages of 108 ± 13 ka, but sands in the upper part of that exposure gave an age of 19.9 ± 3.5 ka. This chronological evidence of a stratigraphic unconformity in what was initially taken as pedogenic differentiation at Gillards Beach is supported by contrasting electron traps and colour centres in crystal lattices of quartz grains in these two samples. No tectonic displacement is apparent. This site provides the first evidence of the Last Interglacial sea level for 1000 km along the coast between Gippsland and Newcastle.
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TL determinations of the ages of aeolian sands and U/Th determinations of the ages of crusts on rock platforms in the Illawarra region, especially at Red Point, indicate that these techniques give considerable promise of a major advance... more
TL determinations of the ages of aeolian sands and U/Th determinations of the ages of crusts on rock platforms in the Illawarra region, especially at Red Point, indicate that these techniques give considerable promise of a major advance in deciphering the Pleistocene coastal record in Australia. The methods of dating are outlined, and problems of laboratory and field interpretation are considered. The longstanding debate as to whether the +2 m level of platforms is modern or is a Pleistocene relict has been resolved for the Illawarra coast, where these platforms can be shown to have been formed during the Last Interglacial high stand of the sea. By inference, the +4 m level must be of at least the same age. The +6 to 7 m level was cut by about 300Ka and may be as old as Pliocene. Four aeolian units at Red Point reworked from nearby barrier beach complexes date from c. 25Ka, 45Ka, 125Ka, and 300 to >400Ka. Reconnaissance surveys and dating indicate that aeolian sands of similar ages occur elsewhere along the New South Wales coast.
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... 1). A detailed study of the morphology of 26 of these vegetated dunes has shown that most exceed 3 m in height and range from 500 m to 3000 m in length (Thom et al., 1992). Smaller undulations also trend east-west. Steepest ...
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A recent analysis has suggested that meteorological tsunami (meteo-tsunami) have occurred around the coasts of the United Kingdom (UK), generated by a range of source mechanisms, such as seiching related to storm activity in enclosed... more
A recent analysis has suggested that meteorological tsunami (meteo-tsunami) have occurred around the coasts of the United Kingdom (UK), generated by a range of source mechanisms, such as seiching related to storm activity in enclosed basins, the arrival of large far-travelled waves generated in the open ocean, and the local generation of large waves near the coast by thunderstorms and squalls. Fatalities have occurred during meteo-tsunami events in the UK, including those of beach users killed by meteo-tsunami arriving unexpectedly at beaches during summer months, when beaches attract large numbers of recreational users, particularly due to thunderstorm-generated meteo-tsunami. This study surveys historic accounts of tsunami-like waves arriving at the coast in association with near-coastal thunderstorms and identifies up to nine meteo-tsunami events that have occurred in the period 1892–1966, up to five of which may have resulted in fatalities. The risk related to such events is discussed and recommends that some measures be made to educate beach users to the meteo-tsunami hazard associated with offshore thunderstorms.
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T he Villach. Austrian Confer-ence on Greenhouse warming predicted in 1985 a rise in sea-level in the next 50 years of between 20-140 cm caused by either melting of ice-caps (including mountain glaciers) or thermal expansion of oceans... more
T he Villach. Austrian Confer-ence on Greenhouse warming predicted in 1985 a rise in sea-level in the next 50 years of between 20-140 cm caused by either melting of ice-caps (including mountain glaciers) or thermal expansion of oceans (World Meteorological ...
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Chevrons are enigmatic yet understudied sedimentary structures. This paper presents a comprehensive description of chevrons along the world's coastlines, and with use of Google Earth, 221 chevron sites were identified.... more
Chevrons are enigmatic yet understudied sedimentary structures. This paper presents a comprehensive description of chevrons along the world's coastlines, and with use of Google Earth, 221 chevron sites were identified. Although morphologically variable, chevrons all show ...
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Summary A general model relating morphology, hydrodynamics and sediment transport behaviour of beach foreshores is outlined. This model states that on a reflective foreshore, where wave energy is reflected from the beach face, sediment... more
Summary A general model relating morphology, hydrodynamics and sediment transport behaviour of beach foreshores is outlined. This model states that on a reflective foreshore, where wave energy is reflected from the beach face, sediment increases steeply in size ( ...
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Page 1. Journal of Coastal Research 1 12 I 4 I 831-840 I Fort Lauderdale, Florida I Fall 1996 Tsunami as a Major Control on Coastal Evolution, Southeastern Australia Edward A. Bryant, Robert W. Young and David M. Price Dept. ...
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Abstract Erosion of natural river banks by boat-generated waves is an increasingly serious problem on the navigable reaches of many rivers, particularly on the middle and estuarine reaches. An experiment designed to link bank erosion... more
Abstract Erosion of natural river banks by boat-generated waves is an increasingly serious problem on the navigable reaches of many rivers, particularly on the middle and estuarine reaches. An experiment designed to link bank erosion rates with easily measured wave ...
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ABSTRACT: Beach morphology, wave-current dynamics, or sediment attributes such as grain-size changes and sorting processes intrinsically characterize each other. The extreme cases of the morphological spectrum include reflective beaches... more
ABSTRACT: Beach morphology, wave-current dynamics, or sediment attributes such as grain-size changes and sorting processes intrinsically characterize each other. The extreme cases of the morphological spectrum include reflective beaches which are steep and ...
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Research Interests: Engineering, Earth Sciences, Coastal Dunes, Sea Level, Coastal, and 8 moreStorm, New South Wales, South, Sea, SAND, Organic Matter, Level, and Sea Level Change
Page 1. Edward Bryant Tsunami The Underrated Hazard (Second Edition) F uDiisnea in association witn S pringer Praxis Publishing PublisheS in association with ris Publisl Chichester, UK Page 2. Contents Preface xi Acknowledgements xv List... more
Page 1. Edward Bryant Tsunami The Underrated Hazard (Second Edition) F uDiisnea in association witn S pringer Praxis Publishing PublisheS in association with ris Publisl Chichester, UK Page 2. Contents Preface xi Acknowledgements xv List of figures xxi List of tables xxvii ...
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(1School of Tropical Environment Studies and Geography, James Cook University of North Queensland, PO Box 6811, Cairns, Queensland 4870, Australia; 2School of Geosciences, University of Wollongong, Northfields Avenue, Wollongong, New... more
(1School of Tropical Environment Studies and Geography, James Cook University of North Queensland, PO Box 6811, Cairns, Queensland 4870, Australia; 2School of Geosciences, University of Wollongong, Northfields Avenue, Wollongong, New South Wales 2522, Australia)
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Summary A direct linear transformation method was used to locate the position of high tide run‐up from oblique and vertical aerial photographs of Stanwell Park beach, NSW between 1890–1980 on a plan map accurate to±2.5 m. Results indicate... more
Summary A direct linear transformation method was used to locate the position of high tide run‐up from oblique and vertical aerial photographs of Stanwell Park beach, NSW between 1890–1980 on a plan map accurate to±2.5 m. Results indicate minor net erosion of less ...
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Stratigraphic differentiation of Wuaternary coastal sedimentary sequences is frequently based upon the recognition of individual palaeosols. A number of assumptions are commonly made in the compilation of such lithostratigraphies; first,... more
Stratigraphic differentiation of Wuaternary coastal sedimentary sequences is frequently based upon the recognition of individual palaeosols. A number of assumptions are commonly made in the compilation of such lithostratigraphies; first, that the development of soil profiles ( ...
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