!±8± Rivers of ice: A tale, illustrative of Alpine adventure and glacier action

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Post Date : Nov 29, 2011 19:30:48 | N/A

Rivers of ice: A tale, illustrative of Alpine adventure and glacier action

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Rivers of ice: A tale, illustrative of Alpine adventure and glacier action

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Globe Trekker - Ice Trekking the Alps featuring Zay Harding

!±8± Globe Trekker - Ice Trekking the Alps featuring Zay Harding

Globe Trekker Zay Harding ski tours the legendary Haute Route from Chamonix to Zermatt. Taking in Mont Blanc and the Matterhorn along the way, he undertakes a tough journey, traversing three western European countries: France, Italy and Switzerland. The trek begins with a training day on the world's steepest and longest ski slope: La Vallée Blanche. After meeting up with his Irish mountain guide - Robbie Fenlon - Zay takes the highest cable car in Europe - l'Aiguille du Midi - to ski this dangerous run (avalanches are a frequent occurrence on the Haute Route). Here Zay masters the technique of off piste skiing in powder-snow and learns how to skillfully negotiate his way out of a deep crevasse. The Haute Route begins at Argentière with a long day of skinning - walking uphill on skis - across the Argentière glacier to reach an isolated mountain hut. Here Zay meets other skiers touring the region and gets to sample the delicious French speciality tartiflette. Day 2 of the trek is another strenuous day with 5 hours skinning to the Col du Chardonnay, at which point Zay and Robbie have to descend into Switzerland on ropes. They ski on to Champex and make a brief stop-over in Verbier to attend an amazing extreme skiing competition. On day 5, Zay picks up the Haute Route once again at Arolla, on the Swiss side of the Alps, skinning up the Pas de Chèvres and descending via steel ladders to the Dix hut which is perched precariously right on top of a mountain peak. Here mountain ...

Globe Trekker - Ice Trekking the Alps featuring Zay Harding

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Peaks, Passes, and Glaciers; Being Excursions By Members of the Alpine Club. Second Series. Two Volumes.

!±8±Peaks, Passes, and Glaciers; Being Excursions By Members of the Alpine Club. Second Series. Two Volumes.

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Post Date : Nov 22, 2011 08:45:47
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The Changing Alpine Treeline: The Example of Glacier National Park, MT, USA (Developments in Earth Surface Processes)

!±8± The Changing Alpine Treeline: The Example of Glacier National Park, MT, USA (Developments in Earth Surface Processes)

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Post Date : Nov 21, 2011 04:25:00 | N/A

The Changing Alpine Treeline: The Example of Glacier National Park, MT, USA (Developments in Earth Surface Processes)

The alpine treeline ecotone (ATE) is an area of transition high on mountains where closed canopy forests from lower elevations give way to the open alpine tundra and rocky expanses above. Alpine tundra is an island biome and its ecotone with forest is subject to change, and like oceanic islands, alpine tundra is subject to invasion – or the upward advance of treeline. The invasion of tundra by trees will have consequences for the tundra biome as invasion does for other island flora and fauna. To examine the invasibility of tundra we take a plant’s-eye-view, wherein the local conditions become extremely important. Among these local conditions, we find geomorphology to be exceptionally important. We concentrate on aspects of microtopography (and microgeomorphology) and microclimate because these are the factors that matter: from the plant’s-eye-view, but we pay attention to multiple scales. At coarse scales, snow avalanches and debris flows are widespread and create “disturbance treelines” whose elevation is well below those controlled by climate. At medium scales, turf-banked terraces create tread-and-riser topography that is a difficult landscape for a tree seedling to survive upon because of exposure to wind, dryness, and impenetrable surfaces. At fine scales, turf exfoliation of the fronts of turf-banked risers, and boulders, offer microsites where tree seedlings may find shelter and are able to gain a foothold in the alpine tundra; conversely, however, surfaces of needle-ice pans and frost heaving associated with miniature patterned ground production are associated with sites inimical to seedling establishment or survival. We explicitly consider how local scale processes propagate across scales into landscape patterns.

The objective of this book is to examine the controls on change at alpine treeline. All the papers are focused on work done in Glacier National Park, Montana, USA. Although any one place is limiting, we are able to examine the alpine treeline here in some detail – and an advantage is that the treeline ecotone in Glacier National Park is quite variable in itself due to the underlying variability in geomorphology at multiple scales.

This book will provide insights into an important ecological phenomenon with a distinctly geomorphic perspective. The editors collectively have over 100 years of experience in working in geomorphology, biogeography, and ecology. They also have each worked on research in Glacier National Park for several decades. The book will be a reference for a variety of professionals and students, both graduate and undergraduate, with interests in Physical Geography, Geomorphology, Ecology, and Environmental Science. Because of the importance of the alpine treeline ecotone for recreation and aesthetic interests in mountain environments, wildland and park managers will also use this book.

* Subject matter: geomorphology at alpine treeline
* Expertise of contributors: each editor brings over 25 years of experience in studies of ecotones and geomorphology, and collectively over 100 years of experience in Glacier National Park
* Changing alpine treeline examines climate change

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The Changing Alpine Treeline, Volume 12: The Example of Glacier National Park, MT, USA (Developments in Earth Surface Processes)

!±8± The Changing Alpine Treeline, Volume 12: The Example of Glacier National Park, MT, USA (Developments in Earth Surface Processes)

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Post Date : Nov 20, 2011 00:16:59 | Usually ships in 24 hours

The alpine treeline ecotone (ATE) is an area of transition high on mountains where closed canopy forests from lower elevations give way to the open alpine tundra and rocky expanses above. Alpine tundra is an island biome and its ecotone with forest is subject to change, and like oceanic islands, alpine tundra is subject to invasion - or the upward advance of treeline. The invasion of tundra by trees will have consequences for the tundra biome as invasion does for other island flora and fauna. To examine the invasibility of tundra we take a plant's-eye-view, wherein the local conditions become extremely important. Among these local conditions, we find geomorphology to be exceptionally important. We concentrate on aspects of microtopography (and microgeomorphology) and microclimate because these are the factors that matter: from the plant's-eye-view, but we pay attention to multiple scales. At coarse scales, snow avalanches and debris flows are widespread and create "disturbance treelines" whose elevation is well below those controlled by climate. At medium scales, turf-banked terraces create tread-and-riser topography that is a difficult landscape for a tree seedling to survive upon because of exposure to wind, dryness, and impenetrable surfaces. At fine scales, turf exfoliation of the fronts of turf-banked risers, and boulders, offer microsites where tree seedlings may find shelter and are able to gain a foothold in the alpine tundra; conversely, however, surfaces of needle-ice pans and frost heaving associated with miniature patterned ground production are associated with sites inimical to seedling establishment or survival. We explicitly consider how local scale processes propagate across scales into landscape patterns.

The objective of this book is to examine the controls on change at alpine treeline. All the papers are focused on work done in Glacier National Park, Montana, USA. Although any one place is limiting, we are able to examine the alpine treeline here in some detail - and an advantage is that the treeline ecotone in Glacier National Park is quite variable in itself due to the underlying variability in geomorphology at multiple scales.

This book will provide insights into an important ecological phenomenon with a distinctly geomorphic perspective. The editors collectively have over 100 years of experience in working in geomorphology, biogeography, and ecology. They also have each worked on research in Glacier National Park for several decades. The book will be a reference for a variety of professionals and students, both graduate and undergraduate, with interests in Physical Geography, Geomorphology, Ecology, and Environmental Science. Because of the importance of the alpine treeline ecotone for recreation and aesthetic interests in mountain environments, wildland and park managers will also use this book.

* Subject matter: geomorphology at alpine treeline
* Expertise of contributors: each editor brings over 25 years of experience in studies of ecotones and geomorphology, and collectively over 100 years of experience in Glacier National Park
* Changing alpine treeline examines climate change

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