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Weather of Southern California
Weather of Southern California
Weather of Southern California
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Weather of Southern California

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LanguageEnglish
Release dateDec 22, 2023
ISBN9780520326194
Weather of Southern California
Author

Harry P. Bailey

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    Book preview

    Weather of Southern California - Harry P. Bailey

    California Natural History Guides: 17

    WEATHER

    OF

    SOUTHERN CALIFORNIA

    BY

    HARRY P. BAILEY

    UNIVERSITY OF CALIFORNIA PRESS

    BERKELEY, LOS ANGELES, LONDON

    CALIFORNIA NATURAL HISTORY GUIDES

    ARTHUR C. SMITH, GENERAL EDITOR

    UNIVERSITY OF CALIFORNIA PRESS

    BERKELEY AND LOS ANGELES, CALIFORNIA

    UNIVERSITY OF CALIFORNIA PRESS, LTD.

    LONDON, ENGLAND

    © 1966 BY THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

    SECOND PRINTING, 1975

    ISBN 0-520-02988-7 (CLOTHBOUND)

    0-520-00062-5 (PAPERBOUND)

    LIBRARY OF CONGRESS CATALOG CARD NUMBER: 65-26070

    PRINTED IN THE UNITED STATES OF AMERICA

    CONTENTS

    CONTENTS

    INTRODUCTION

    GEOGRAPHIC SETTING

    LAND-SURFACE FORMS OF SOUTHERN CALIFORNIA AND AIR FLOW

    THE CALIFORNIAN CLIMATE ABROAD

    CLIMATIC REGIONS OF SOUTHERN CALIFORNIA

    THE MARITIME FRINGE

    INTERMEDIATE VALLEY

    TRANSITION AND MOUNTAIN CLIMATES

    HIGH DESERT

    Low DESERT

    WEATHER TYPES

    WINTER CIRCULATIONS

    SANTA ANA WINDS

    WINTER AIR FROM THE SEA

    SUMMER CIRCULATIONS

    FIRE, FLOOD, DROUGHT, AND SMOG

    FIRE

    FLOOD

    DROUGHT

    SMOG

    FURTHER ACTIVITIES

    SUGGESTED READING LIST

    TABLE 1. Definitions of the Climatic Types of Southern California

    INTRODUCTION

    The subject of the climate of southern California is one of more than usual interest, if we are to follow ordinarily reliable indications of popularity. Comedian Bob Hope has wisecracked for years about California weather events that run contrary to its stereotype as a kind of extra-tropical paradise. The late Monty Woolley, carrying out the same tradition, once remarked that only in southern California could one freeze to death under a rose bush in bloom. Perhaps this kind of nonsense is a necessary antidote to the saccharine, almost worshipful accounts that are to be seen in the writings of early travelers, some of whom were imbued with the notion that what must be good for trees (as evidenced by the size and age of the Giant Sequoia) must also be good for man.

    In a more serious vein, however, we note that the routine publications of the U. S. Weather Bureau dealing with California climate usually run out of print promptly, and that the California issue of the Climates of the States series is no longer to be had, which is one of the reasons for using space in this little book to present tabular data in the appendix. One climatologist, who is the author of a well-known volume on the climates of entire continents, has become so impressed by the popular interest in the climate of California that in the later editions of his book he has interpolated a separate chapter on California alone, the only part of Anglo-America to be treated separately from its continent.

    A decade ago, in a penetrating analysis of the migration of people to California (which has now attained the rank of one of the great migrations of all time), Edward Ullman, a geographer of note, concluded that for the first time in human history large numbers of people could change their location to gain amenities, rather than for economic advantage. Of the amenities that California has offered, Ullman noted that none is more important than the attraction of its climate. And since statistics of comparative regional increase show that southern California has mushroomed most spectacularly, its climate is a legitimate focus of interest.

    What is the essence of the lure of the climate of southern California? Ive asked that question of many people. My grandfather gave his answer in terms of the justifiably high expectation that rain would not spoil an outing scheduled well in advance—a reaction natural enough for a retired preacher who had seen many a church social spoiled in the rainier climate of eastern Pennsylvania. A student who was also a mother of active, runabout boys gave quite a different aspect to the same point: to her the chief climatic advantage of Los Angeles over New York was relief from the dread that lighting would strike down her children while at play.

    Other kinds of answers have been given to the same question. The mild climate of coastal California has seemed to many a kind of deliverance from the tyranny of the elements, not only because of the absence of snow and rarity of rain, but also because of relief from extremes of cold and heat. Still another group places emphasis not on the temperateness of the climate but upon its variety, with considerable change obtainable by relatively short travel from one location to another. Inevitably, the fact of variety leads to partisan regional preferences, a discussion that need not concern us here other than to establish that variety does indeed exist in southern California, and to a degree unknown on the more level terrains east of the Rocky Mountains.

    GEOGRAPHIC SETTING

    The momentary state of the atmosphere we call weather; its long-term state is climate. Since weather is variable, climate embraces a multitude of unlike events, and no simple method has ever been found to express all of them with complete accuracy. The climatologist knows beforehand, then, that in the eyes of some he will commit sins of commission or omission; he must find his satisfaction in bringing any description to a partial state of order.

    Southern California, we note, is at the margin of a continent across which large transfers of air take place at some times, and little at others. Thus the marine effect on climate is strongly variable. The climate usual at the coastline, in other words, moves far inland when sea air in considerable depth moves strongly on land. It is also possible for land air to sweep out to sea. When that happens even the coastline may experience hot, dry air more typical of the desert interior.

    The difference in the state of the air over water and land is considerable, especially in summer when land surfaces are much warmer than the sea surface. The separation between the two is more than a matter of distance, for the terrain itself tends to divide the air of southern California into either the sea or the land variety. A glance at figures 1 and 2 will confirm this fact. If we accept the 35th parallel as the northern boundary to the region, southern California contains two prominent mountain systems. The first, stretching inland from Point Arguello for more than 200 miles, is the Transverse Range. The second, the Peninsular Range, extends northward from the Mexican border. Both ranges gain altitude inland; their highest peaks are only 20 miles apart and are located close to the intersection of the axes of the two ranges, near the town of Beaumont.

    Thus, a triangular coastal sector exists seaward of the Transverse and Peninsular Ranges, of which the hypotenuse is the coastline. For our purposes, this sector will be called the Lowland of Southern California. Open

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