By John Moynier
Should you commute, ski, snowmobile, snowshoe, or mountaineer in a space the place there's lots of slope and many snow, you then are uncovered to avalanche probability. In Avalanche acutely aware, veteran backcountry ski consultant and avalanche forecaster John Moynier deftly publications you thru the fundamentals of the way avalanches paintings, spotting avalanche terrain, and trying out the snow pack-before you enterprise onto risky flooring. priceless black-and-white illustrations of right apparatus, slope attitude, snow pit assessments, and the results of wind and climate accompany his witty, informative motives of the way to prevent avalanche threat. No ebook on avalanche safeguard will be whole with no description of seek tools within the occasion of an unforeseen slide, and Moynier's necessary causes of the way to head approximately discovering a misplaced good friend offers you additional self assurance should you take on the slopes. For actually stress-free and profitable wintry weather expeditions, research Avalanche conscious ahead of you head out and make it a part of the security apparatus you hold within the box.
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Additional resources for Avalanche Aware: Safe Travel in Avalanche Country
Sometimes a hard slab will be so strong that it can support itself even when part of the underlying weak layer collapses. When this happens, the slab will feel hollow underneath your feet or skis. This is a very dangerous condition! If the underlying layer collapses there may be an audible "whoomph" as the air is pressed out. Due to the release of elastic tension in the layer, cracks may shoot out across the slope as the slab fails. Page 25 Wet and Dry Avalanches Avalanches can also be characterized as being either "wet" or "dry" based on the amount of free water in the snow.
Most of them are made of heat-treated aluminum or Lexan plastic. The shaft needs to be very strong, and preferably with a telescopic length adjustmentmost offer a detachable blade. The handle should be comfortable to grip; a T- or D-shaped handle is best (see Figure 4, which shows a T-shaped handle). Shovels can also be used to dig pits for conducting snow-pit tests and to build snow shelters. Just remember that while some shovels work better for these tasks than others, the primary objective is to cut through dense debris and recover a buried friend.
Watch for denser layers overlying less dense or weaker layers. Checking the Snow As you dig, look for red flag situations such as denser layers overlying weaker layers, hard ice lenses, or weak, faceted crystals on top of a smooth crust. How the snow behaves as you dig the pit Page 77 will supply a few important clues. As mentioned before, it is not usually necessary to dig the pit more than 3 to 4 feet deep. ) If it is early or late in the season, and you suspect deep slab or layers of depth hoar, you may want to dig to the ground.