Download e-book for iPad: Atmospheric Halos by Walter Tape

By Walter Tape

ISBN-10: 0875908349

ISBN-13: 9780875908342

ISBN-10: 111866793X

ISBN-13: 9781118667934

About The Product

Published through the yank Geophysical Union as a part of the Antarctic study Series.

Archdeacon caught was once seeing halos shaped in moonlight. Their daylight hours opposite numbers are strangely universal, not just within the arctic yet in temperate climates in addition. Many halos are attainable, forming arcs of coloured or white gentle nearly anyplace within the sky. Their occasional brilliance, sort, and unique shapes have inspired skywatchers for centuries.

This publication introduces halos and attempts to exhibit a few of their good looks. It tells a lot of what's identified approximately them: how they come up, how such a lot of are attainable, and why a few are infrequent, whereas others ensue each few days or so. No such insights, in fact, are useful for the joy of a halo show; certainly, an difficult reveal is considered one of Nature's wonders. however, figuring out can upload to entertainment, in particular because the makings of an excellent reveal become as extraordinary because the show itself.

Chapter 1 Halos from Plate Crystals (pages 1–12): Walter Tape
Chapter 2 Halos from Column Crystals (pages 13–27): Walter Tape
Chapter three Halos from Parry orientated Crystals (pages 29–44): Walter tape
Chapter four The 22° and forty six° Halos (pages 45–51): Walter Tape
Chapter five Why Are the infrequent Halos infrequent? (pages 53–57): Walter Tape
Chapter 6 The function of solar Elevation (pages 58–68): Walter Tape
Chapter 7 Subhorizon Halos (pages 69–76): Walter Tape
Chapter eight chilly climate Halos (page 77): Walter Tape
Chapter nine Organizing the Halos (pages 78–81): Walter Tape
Chapter 10 Pyramidal Crystals and abnormal Radius round Halos (pages 82–94): Walter Tape
Chapter eleven Hevel'S Halo and different Mysteries (pages 95–104): Walter Tape

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Extra info for Atmospheric Halos

Example text

In weak displays,I sometimescould not confirm that the halos were nearby,andcrystalsamplesfrom suchdisplaysdo not appearin thisbook. Figure 3-18. Towerusedasa background to detectnearbyhalos. No halosarepresent. Copyright American Geophysical Union Antarctic Research Series 40 Atmospheric Halos ATMOSPHERIC HALOS Display 3-4 South Pole, February 16, 1986 The Parry arc describedpreviouslyis technicallythe (upper) suncaveParry arc. Its ray pathwas shownin Figure 3-8, where the sunelevationwas 20ø.

And the outerhalo is indistinguishable from the 46ø halo made by the randomlyorientedcrystals in Figure 4-2. 3 In Figure 4-4 the crystal flits were reducedfurther, to 5ø. To give easilyidentifiablesupralateraland infralateral arcs,the crystaltilts mustbe reducedto about2ø,as in Figure4-5. Conversely,a strong22ø halo and a weak or absentuppertangentarc would confirmthe identificationas a 46øhalo. As explainedin step3 of AppendixF, 68% of them are within 30ø of horizontal,and 95% within 60ø, whereasfor randomlyorientedcrystals,50% are within 30 ø of horizontal, and 87% within 60 ø.

SomecrystalscollectedduringDisplay2-4, aboutfive minutesafterthe halophotographs weretaken. Copyright American Geophysical Union Antarctic Research Series Atmospheric Halos Vol. 64 22 Figure 2-17. All-sky view, Display 2-4. Examination in direct sunlight may bringout faint halosin the photograph. Figure 2-18. Singlyorientedcolumns made the labeled halos. Other crystal shapesand orientations were also used in making the simulation. For a comparable simulationusingsingly oriented columnsalone, see Figure C-13 of AppendixC.

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