Dune Worlds

... dune field coverage (million km2) 0.0183 5 0.9 10 Dune field coverage (%) *0.004 *1 *0.6 *12 Predominant dune types (unknown) Linear, transverse Barchan, transverse Linear R. D. Lorenz and J. R. Zimbelman, Dune Worlds, Springer.

Author: Ralph D. Lorenz

Publisher: Springer Science & Business Media

ISBN: 9783540897255

Category: Science

Page: 308

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This book describes how sand dunes work, why they are the way they are in different settings, and how they are being studied. Particular attention is paid to their formation and appearance elsewhere in the solar system. New developments in knowledge about dunes make for an interesting story – like the dunes themselves, dune science is dynamic – and the visual appeal of Aeolian geomorphology ensures that this is an attractive volume. The book is divided into 4 parts, the first of which introduces dunes as a planetary phenomenon, showing a landscape reflecting the balance of geological processes – volcanism, impact, tectonics, erosion, deposition of sediments. Dunes are then considered as emergent dynamical systems: the interaction of sand and wind conspires to generate very characteristic and reproducible shapes. Analogies are given with other emergent structures such as patterned ground before the influence of dunes on desert peoples and infrastructure is studied, together with their use as forensic climatological indicators. Dune Physics is looked at with regard to the mechanics of sand, the physics of wind, saltation – interaction of sand and air – dunes versus ripples and transverse Aeolian ridges, the classification of dune morphology and the sources and sinks of sand. Dune Trafficability considers soil mechanics, effects on mobility on Earth, Mars and elsewhere. In the second part, Earth, Mars, Titan and other moons and planets are examined, beginning with a survey of the major deserts and dunefields on Earth. The authors then turn to Mars and its environment, sediment type, dune stratigraphy, sediment source and sinks and the association of dunes with topographic features. Titan follows - its thick, cold atmosphere, methane dampness, low gravity, morphology – interaction with topography and the implications of dunes for climate and winds. Dunes elsewhere conclude this part. There are few dunefields on Venus, but there is a .possibility of Aeolian transport on Triton and volcanic-related windstreaks on Io.

The Marine World

A cross-section through a hypothetical sand dune system showing the stages of dune development and vegetation succession typically seen in the UK. ... Coastal sand dunes fringe and protect shorelines in many parts of the world.

Author: Frances Dipper

Publisher: Princeton University Press

ISBN: 9780957394629

Category: Nature

Page: 544

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The Marine World is a book for everyone with an interest in the ocean, from the marine biologist or student wanting expert knowledge of a particular group to the naturalist or diver exploring the seashore and beyond. With colour illustrations, line drawings, more than 1,500 colour photographs, and with clear accessible text, this book encompasses all those organisms that live in, on and around the ocean, bringing together in a single text everything from the minuscule to the immense. It includes sections on all but the most obscure marine groups, covering invertebrate phyla from sponges to sea squirts, as well as plants, fungi, bacteria, fish, reptiles, mammals and birds. It incorporates information on identification, distribution, structure, biology, ecology, classification and conservation of each group, addressing the questions of ‘what?’, ‘where?’ and ‘how?’. Today global warming, overfishing, ocean acidification and pollution are just a few of the ever increasing number of threats and challenges faced by ocean life. Without knowledge of the animals, plants and other organisms that live in the marine world, we cannot hope to support or implement successful conservation and management measures, nor truly appreciate the incredible wealth and variety of marine life. The Marine World is the product of a lifetime spent by Frances Dipper happily observing and studying marine organisms the world over. It has been brought to colourful life by a myriad of enthusiastic underwater photographers and by Marc Dando, the renowned natural history illustrator.

The Plant World

dunes . Somewhat dreamy is the aspect of the whole region . It is hardly necessary to say that nowhere wandering dunes are seen to encroach upon human possessions on the inside . How different from this is the situation on the shore of ...

Author:

Publisher:

ISBN: UOM:39015068323792

Category: Botany

Page:

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Atlas of the World s Deserts

that dunes grow, shift, merge, split, and fade in all kinds of mixtures and combinations. ' Linear, or seif (from the Arabic word for “sword”), dunes are strait or slightly sinuous sand ridges that may be up to 300 kilometers (186 mi.) ...

Author: Nathaniel Harris

Publisher: Routledge

ISBN: 9781135456139

Category: Reference

Page: 192

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The Atlas of the World's Deserts examines the hostile and extreme environments that characterize deserts, and is divided into chapters that concentrate on specific aspects of a desert's geology, life forms, history, and future. For more information including sample pages, visit the Atlas of the World's Deserts web site. Also includes 160 color maps and photos.

World Today

have but a little learning ' of the laws A valuable feature of the Lake Michigan which govern wind and weather — there sand - dunes to the student , is that all stages occurs in a place like this one we are of this kind of world ...

Author:

Publisher:

ISBN: UOM:39015074651970

Category:

Page:

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The School World

The veriest by such plants ( called xerophytes ) as are able beginner in botany expects to find marram to restrict their transpiration to correspond grass on a sand dune , gorse on exposed sandy with their powers of water absorption ...

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Publisher:

ISBN: MINN:319510007656128

Category: Education

Page:

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Echinoderms in a Changing World

Multibeam bathymetry showing the subaqueous dunes at Hydrographers Passage, a narrow channel in the outer reef matrix of the central GBR, 200 km northeast of Mackay, Queensland. on the AUV collected data on chlorophyll and turbidity.

Author: Craig Johnson

Publisher: CRC Press

ISBN: 9781138000100

Category: Science

Page: 330

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Echinoderms are an ancient and diverse group of marine animals with a rich fossil record. They occur abundantly in all modern oceans and at all depths, where they contribute importantly to patterns in biodiversity and to the structure and functioning of marine systems. It is therefore vital to understand how they will respond to a rapidly changing ocean climate and other anthropogenic stressors, informed by both the dynamics of the fossil record and responses of extant species. The theme of the 13th International Echinoderm Conference (Hobart, Tasmania, 5-9 January 2009) was the response of echinoderms to global change. Echinoderms in a Changing World contains a selection of plenary and contributed papers, and a comprehensive presentation of abstracts of all oral papers and posters. The collection will be useful to all students of echinoderm biology, ecology and palaeontology, from undergraduate level to professional researchers.

The World To day

have but a little learning " of the laws A valuable feature of the Lake Michigan which govern wind and weather - there sand - dunes to the student , is that all stages occurs in a place like this one we are of this kind of world ...

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Publisher:

ISBN: WISC:89009837824

Category:

Page:

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The Plant World

In low places , especially in the shelter of high dunes , a fairly close plant community may occur , but elsewhere ... TYPICAL DUNE VEGETATION The pioneer plants are chiefly the sand verbena ( Abronia latifolia ) and a low , spreading ...

Author:

Publisher:

ISBN: CHI:73701592

Category: Botany

Page:

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God s World

The rhaniqs' hooves leave rows of dimples in the dunes, sharper and less slurred than they would be on Earth, less prompt to fill—though the breeze is already at work, shifting grains. These sandhills rise a hundred to a hundred and ...

Author: Ian Watson

Publisher: Hachette UK

ISBN: 9780575114593

Category: Fiction

Page: 254

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The sudden appearance of angelic beings bearing a mystical space drive and a summons to ''God's World'' launches an international crew of scientists on a voyage to the far limits of space. There they become embroiled in an alien war that will decide the fate of all creation . . .