Get Alaska Science Nuggets (Natural History) PDF

By Neil Davis

ISBN-10: 058518626X

ISBN-13: 9780585186269

ISBN-10: 0912006382

ISBN-13: 9780912006383

Do iceworms devour ice?  are you able to pay attention the aurora?  How does mosquito repellent work?  Why are Alaskan volcanoes flippantly spaced alongside the coast?  Is it attainable for warm water to freeze speedier than chilly water?  the place are Alaska's greater than a hundred twenty five scorching springs?  Why are northern twilights so long?  Do glaciers slide or do they flow?  Why do snowflakes flutter as they fall? In Alaska technological know-how Nuggets, Neil Davis solutions those and lots of different exciting questions within the wonderful and informative variety that makes him one in every of Alaska's favourite technological know-how writers.  This compendium of approximately four hundred articles, together with articles by means of different participants to a technological know-how column carried by way of numerous Alaska newspapers, discusses phenomena as assorted because the northern lighting fixtures, permafrost, glaciers, meteorology, volcanoes, earthquakes, archaeology, Alaskan vegetation, mammoths, early people, and northern living. Tourists and long-time Alaskans alike have made this much-loved e-book a bestseller for years.  Alaska technological know-how Nuggets is a brilliant reference or present for a person attracted to the exceptional average historical past of the North.

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Additional resources for Alaska Science Nuggets (Natural History)

Sample text

15 Auroral Flights 15 Auroral Sounds 15 Insight into Auroral Sounds? 16 Auroras and Migrating Birds 16 More on Auroras and Birds 16 Abnormal Radio Propagation 17 Radio Waves and Aurora 17 The Aurora Versus CB'ers 17 Aurora Versus Power Lines 19 Aurora and Climate 19 Red Aurora 20 December 19, 1980 Red Aurora 20 Historical Auroras 21 Man-Made Aurora 21 Barium Releases 23 International Barium Releases 23 Barium Releases from Orbit 24 Lithium Red Sky 24 Flying Rockets 25 Old Reliable 25 Whistlers 26 Chapter Two Astronomy and Keeping Time The Stars at Night 27 The Night Airglow 27 "The Jupiter Effect" 28 Venus 28 Reporting Unusual Events 28 Unusual Events in the Sky 29 An Unidentified Flying Object 30 Seeing Satellites 30 The Truth about Sputnik 31 Skylab Predictions 31 Alaskan Eclipses 32 February 1979 Eclipse 33 Streakers in the Night 33 Alaskan Meteorites 33 The Aggie Creek Meteorite 34 The 1929 Kuskokwim Meteor 34 The Savonoski Problem 35 Document Page vi Cold Meteorites 35 Meteor Sounds 36 Halloween Fireball Meteor 36 The Missing Night 36 Snowball in Siberia 37 Shortest DayShortest Night 37 Twilight Zone 37 Photograph the Midnight Sun 38 Moon and Sun Chart for Fairbanks 39 Sunrise and Sunset Times 41 Changing Time 41 Solstices, Equinoxes and Leap Years 41 Tanana Moon Calendar 42 A Sundial for Fairbanks 42 Compass Accuracy 44 Chapter Three Northern Sky and Weather Sun and Weather 45 The Moon and Weather 45 High-Altitude Winds 46 Noctilucent Clouds 46 On Climatic Cycles 46 1816, Year Without Summer 47 Predicting Local Weather 47 Serious Weather Predictions 47 Climatic Variations 47 Fairbanks' Changing Climate 48 Glaciers Advancing or Retreating?

That Page 3 energy is again converted to energy of motion of those electrons and protons which stream down into the atmosphere to collide with the air to cause the aurora we see. The details of energy conversion and energy transfer processes are very complex and not yet entirely understood. If we can understand the details, the knowledge should give valuable insight into cosmological processes, since we suspect that the processes in the aurora are those which also occur in stellar bodies and perhaps elsewhere in the Universe.

Use a ''night light'' in the foreground, such as a cabin window. Regular outside lights are too bright and may overexpose the film during the 3 to 30 seconds it takes to catch ordinary auroral arcs. These arcs follow a daily pattern, so if you notice a composition you missed, chances are it will occur again some other night. Open the camera's shutter while the arcs are more or less stationary or "painted' across the sky. Too much motion during exposure results in blurry non-descript forms. Don't let the film and camera "cold soak" by standing out for hours.

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Alaska Science Nuggets (Natural History) by Neil Davis

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