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1. |
Energy and environmental responsibility—An alternate view |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 3,
1980,
Page 17-17
James R. Dunn,
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摘要:
Earth scientists working throughout the world must be dismayed by the obviously destructive impact of land use practices in virtually all of the less developed countries (LDCs). Their landscapes show the negative imprint of the human hand of both ancient and contemporary civilizations. It is apparent to many that even a short extrapolation of current environmental trends would show that their continuation could take a deadly toll in terms of human misery and in terms of the flora and fauna of the world.Seeing such problems through the practiced eyes of the geologic observer is relatively simple. Not nearly so easy is understanding the cause of the destructive land use practices of the poorer nations. Although the roots of the causes are cultural and ancient, the recent enormous acceleration of environmental degradation in the LDCs is complexly related to world politics and economics. Thus, although it has long been known that the civilizations of the world are economically and sociologically interrelated, it can also be shown that the world's environments are interdependent and cross‐culturally influenced. In a real sense, an attitude in the United States can influence the erosion rate of an area in Bolivia or have an impact on an elephant in Afric
ISSN:0002-8606
DOI:10.1029/EO061i003p00017
年代:1980
数据来源: WILEY
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2. |
Energetic particles and collisionless shocks |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 3,
1980,
Page 18-18
Anonymous,
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PDF (136KB)
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摘要:
The interplanetary medium provides three generic types of collisionless shocks, all of which play an important role in the acceleration and modulation of energetic electrons and ions found in the solar wind. These types are (1) standing bow shock waves found in front of some planetary objects (e.g., Earth and Jupiter); (2) shocks propagating outward from the sun in association with solar mass ejection events; and (3) shocks formed at heliocentric distances greater than ∼ 2.5 AU by the steepening of high‐speed solar wind streams.Traditionally, the study of particle acceleration processes active within the solar system has focused on the more energetic particles (above ∼200 keV and extending well up into the MeV range). This is at least in part attributable to the fact that most of the observations were made at high energy. Recently, however, sensitive instruments have been exploring the region below 200 keV, where most of the accelerated particles are found. These new measurements are providing fresh insights into the acceleration processes involved and are reviving interest in the su
ISSN:0002-8606
DOI:10.1029/EO061i003p00018-01
年代:1980
数据来源: WILEY
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3. |
Statements of candidates for president‐elect of AGU |
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Eos, Transactions American Geophysical Union,
Volume 61,
Issue 3,
1980,
Page 24-24
Anonymous,
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PDF (2632KB)
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摘要:
As I understand it, this is the first election where the new AGU rules require that there be two candidates for the officers to be chosen in the spring elections. Why else would one agree to oppose such an outstanding candidate for the office of president‐elect? The questions and opportunities facing the AGU are staggeringly complex. One of its main purposes, to act as an intelligence service in the geophysical sciences, requires countless inputs to be somehow reviewed and collated into a limited number of useful journal outputs. The AGU's publication power is impressive, but it must always be concerned with C2QD; coverage, cost, quality, and distributio
ISSN:0002-8606
DOI:10.1029/EO061i003p00024-01
年代:1980
数据来源: WILEY
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