Weather: How It Works and Why It Matters

Overview

Scientists have delved deep into the smallest particles of matter and have extended their view to the far reaches of the universe, but still they are unable to predict the temperature five days hence. In this intriguing book, two experts in meteorology and astronomy take us on a grand tour of Earth's weather. Amid colorful anecdotes of the Galápagos, Siberia, and places closer to home, they describe the factors involved in shaping our weather, from humidity and prevailing winds to air-pressure systems and the ...

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Weather: How It Works And Why It Matters

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Overview

Scientists have delved deep into the smallest particles of matter and have extended their view to the far reaches of the universe, but still they are unable to predict the temperature five days hence. In this intriguing book, two experts in meteorology and astronomy take us on a grand tour of Earth's weather. Amid colorful anecdotes of the Galápagos, Siberia, and places closer to home, they describe the factors involved in shaping our weather, from humidity and prevailing winds to air-pressure systems and the causes of seasonal change. They also explore the history of Earth's climate and its pivotal role in the development of life and human evolution. The authors end with a discussion of the major threats to Earth's atmosphere brought on by human activity, including global warming and ozone depletion, and argue that pure science-not politics-should dictate our policy responses.

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Product Details

  • ISBN-13: 9780738205212
  • Publisher: Basic Books
  • Publication date: 10/23/2001
  • Pages: 240
  • Product dimensions: 6.08 (w) x 9.10 (h) x 0.67 (d)

Meet the Author

Arthur Upgren is Professor of Astronomy at Wesleyan University and has been director of its Van Vleck Observatory. He is the author of Night Has a Thousand Eyes: A Naked-Eye Guide to the Sky, Its Science, and Lore.Jurgen Stock has been on the faculty of Hamburg and Case-Western Reserve Universities. He has also been director of the Cerro Tololo Inter-American Observatory at La Serena, Chile, as well as founding director of CIDA, the Venezuelan National Observatory at Mérida.

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Read an Excerpt

1: Introduction

We have not inherited the World from our ancestors, we have borrowed it from our children.
--Native American Saying

THE STORM INTENSIFIED THROUGHOUT THE NIGHT; from intermittent wind gusts it heaved itself into a raging turmoil. Off the east coast of the United States, no less than three low-pressure vortices, or lows, converged into a fury. The tide was high and the sea swept landward far beyond its normal range. The waves, whipped by hurricane-level winds, ripped at houses and high-rise buildings near the shore, tearing many of them to pieces in minutes. This storm had no equal.

Outside our suburban Philadelphia flat, the air pressure dropped. As the wind rushed past the outside wall, the consequence of a well-known natural law, the Bernoulli Theorem, set in. (This natural law has the same effect on an airplane wing; the resulting difference in pressure above and below the wing creates lift.) As the rising velocity of the air outside created a lower pressure, the pressure difference between the outside and inside wall surfaces of our building continued to build with the wind's velocity. The wind whined, its varied pitch a descant of parallel voices.

I heard a shattering crash. The bathroom window smashed out of the wall; glass, frame, casement and all went careening into the street. I was now part of the action as I scrambled to grab the papers blowing everywhere; some were even being sucked out through the jagged hole in the bathroom wall. Only much later in the night did this behemoth of a storm move out to sea and leave us in relative peace.

The storm of March 1962 was not a hurricane. Not at all. It did not form in the tropics and the season was wrong. But it behaved like a hurricane: It packed a hurricane's punch and caused extensive damage along the Delaware and Maryland coasts. Winds and wave action reduced entire blocks of homes to rubble. The juxtaposition of three lows in conjunction with high tides raised one of the worst storms in the East Coast's history, not unlike the powerful and deadly storm Sebastian Junger described in The Perfect Storm.

This was a storm, then, full of sound and fury; but it faces an opposite number on the weather spectrum; this weather steams languidly upon the sky's stage, as it did for me one summer day in Vienna. It shows no rage, nor does it sing in a crashing, whining chorus. In recent years during the summer, a heavy and uniform yellow-gray sky often glowers darkly on an afternoon; only the Sun's diffuse rays shining through the haze breaks the oppressiveness. As we endure the pervasive, stifling heat and intense headache-breeding glare, no breath of air breaks the stillness; no zephyr relieves the miasma; no cloud breaks the uniform sky. When the Sun sets, no one sees it; the dull orange-red ball vanishes into the grayness while still well above the western horizon. Thus do we describe the most common of all types of weather, especially in or near urban regions. As the twentieth century drew to a close, this desolate weather pattern grew ever more common during the summers. It affected not only cities known for oppressive summer heat-Washington, Rome, and Athens-but also Vienna, Copenhagen, and London, cities that during the nineteenth century and most of the twentieth century were refuges from intense heat.

We have described two extremes in the weather of the temperate regions of the world. In the first, the winds of winter storms wreak havoc in barbaric proportions; in the second, not even a gentle susurrus stirs the leaves wilting in the unrelenting heat. Climatologists know that both these extremes are growing more common. Extreme though they appear, they constitute the "normal" weather of the future. Most of the twentieth century saw a gentle period of weather that was abnormal in its very normality and relative calm. The floods and drought, the long steamy summers and cold snowy winters are our likely lot for the coming century, and our adding greenhouse gases can only further and prolong the misery.

The swirling highs and lows, the warm and cold fronts, and the storms and calm interludes are normal features of the atmosphere of a rotating planet. Even if we could somehow smooth these irregularities into an undisturbed clear and even state, it would take only a few weeks for the air to return to its present diverse condition. Earth, with its endless procession of sunshine, overcast skies, and sunshine again, is unique among the objects in the solar system. Our marbled blue-and-white globe appears half clear and half cloudy from space. Ours is the only planet from which the Sun and the stars are visible on clear days and nights, but not on cloudy ones.

The other worlds in our solar system either hide behind impenetrable veiled atmospheres or bare their surfaces to the universe. In the first group we find Venus and the four gassy giant planets: Jupiter, Saturn, Uranus, and Neptune, along with Saturn's largest satellite, Titan, and, in a sense, the Sun, which is gaseous throughout. The terrestrial planets have desolate, barren surfaces covered with craters; these were formed in the early days of the system, when debris collided with debris everywhere before, during, and after the larger, gassy planets had coalesced and formed. Our globe is not interchangeable with any other; we must care for it if only because there is no other worthy real estate around.

No part of our natural environment is as visible and as variable as the weather. Neither the solid surface of our world nor the oceans undergo the variety and rapidity of change that occurs in the atmosphere. The atmosphere is the gaseous part of our planet and as such it is subject not only to a number of influences but to a rapidity of change that liquids and solids rarely experience. Together with the topography and composition of the surface, the atmosphere forms the background for a diversity of life, which it helps sustain. Through its normal diurnal and seasonal variation, the atmosphere defines the limits of agriculture, a discovery that, perhaps more than any other, led us from lives as nomadic hunter-gatherers to settled lives in villages and cities. A stable supply of food, in turn, allowed some citizens to take up trades not related directly to the accumulation of food: People became priests and scribes (and eventually, even meteorologists), developments that led to our modern complex society.

Climatic conditions once dominated human activity and to some extent still do; what natural sequence of events provokes more praise or vexation than the weather? Extreme weather conditions may cause disruptions in climate, but vegetation soon recovers, as does animal and human life. Primitive people learned to adapt to the varying conditions of their surroundings, but as civilization became more complex, with its globally intertwined economies, people were not always well prepared to survive during extreme weather conditions.

The state of our preparedness is the key to our future. Evidence for imminent major changes in the global climate is substantial and growing. Chief among these is a change, increasing at an ever faster rate, in the composition of the Earth's atmosphere. Most, if not all, of the changes result from human activity. The recognition of this fact has only recently brought climatology into the forefront of scientific study the world over...

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Table of Contents

List of Illustrations XI
Preface XV
1 Introduction 1
2 Temperature and Pressure: The Fundamentals of Air 7
3 It's Not the Heat ... It's the Heat and the Humidity 15
4 The Four Seasons 30
5 Other Worlds: Lessons from Comparative Planetology 42
6 Weather Wisdom and Lore 50
7 Stormy Weather 70
8 When Time Stood Still: The Ancient History of the Climate 76
9 Here Come the Glaciets 92
10 The Post-Glacial Period: Homo Sapiens Comes of Age 108
11 The Greenhouse Gases: Making Our Own World 124
12 Oceans: The Majority Rules 146
13 El Nino: From Hoax to Menace 154
14 Ozone, Good and Bad 159
15 Two Worlds 166
16 Energy: Production and Consumption 172
17 The World in a Future Climate 183
18 Global Warming: The Everyman Misconception 188
Appendix I Mass and Weight 200
Appendix II Air Pressure and Density 202
Appendix III Absorption and Condensation 205
Appendix IV The Coriolis Effect and the Prevailing Westerlies 209
Appendix V Further Remarks on the Causes of Mass Extinctions 211
Appendix VI Instances of Global Warming 213
Bibliography 216
Index 218
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Sort by: Showing 1 Customer Reviews
  • Anonymous

    Posted September 22, 2002

    buy this book!

    i sure wanna know how weather works and why it matters. Everyday you feel cold or hot but you never know how it works or why it even matters to know ,but buy this book and you'll know everything of how weather works.I sure love this book

    2 out of 2 people found this review helpful.

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