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1. |
December streamflow |
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Eos, Transactions American Geophysical Union,
Volume 65,
Issue 3,
1984,
Page 17-17
Anonymous,
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摘要:
The high streamflows of recent months in the West eased somewhat during December, but streamflows increased in much of the eastern United States, setting many record or near record high flows in several states, according to the monthly check on national water resources conditions by the U.S. Geological Survey (USGS).USGS hydrologists said that record or near record high average streamflows for the month were set at 36 stations in 24 states from Georgia to Alaska. In contrast to the many historic high flows, reports of low streamflows were isolated and unusual, with most low flows occurring between the Mississippi River and the Rocky Mountains and in the Pacific Northwest (see map, courtesy USGS).
ISSN:0002-8606
DOI:10.1029/EO065i003p00017-02
年代:1984
数据来源: WILEY
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2. |
A relation among geomagnetic reversals, seafloor spreading rate, paleoclimate, and black shales |
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Eos, Transactions American Geophysical Union,
Volume 65,
Issue 3,
1984,
Page 18-19
Eric R. Force,
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PDF (1608KB)
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摘要:
The Mesozoic‐Cenozoic histories of reversals in the earth's magnetic field and of periods of widespread anoxia in the ocean basins show a remarkable correlation (Figure 1); periods of black‐shale deposition (“anoxic events”) occur during lengthy periods without magnetic reversals (“quiet” periods). My assembly of published work indicates a remote connection between quiet periods and anoxic events and suggests its form: Magnetic quiet periods coincide with fast seafloor spreading. During these periods, buoyant spreading ridges displace seawater onto broad shelves, thus decreasing earth's albedo and causing global warming. Temperature gradients, and thus density gradients, from pole to equator decrease in surface waters, and the deep ocean currents of oxygenated polar waters wane. Oxygen minimum zones intensify and widen; anoxic conditions throughout entire basins are indicated by black shales deposited in the deep sea. These relations thus suggest that the earth's interior processes and its climate are related and their status recorded by both magnetic polarity and anoxic event chronologies of the earth. A test of the model for the Palezoic is proposed and some implications for mineral reso
ISSN:0002-8606
DOI:10.1029/EO065i003p00018
年代:1984
数据来源: WILEY
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3. |
Water in silicate melts |
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Eos, Transactions American Geophysical Union,
Volume 65,
Issue 3,
1984,
Page 19-19
Paul McMillan,
Edward Stolper,
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摘要:
Water is one of the more important volatile species in magmas, both in terms of its abundance and its influence on the properties of a given magma. Many workers in the geological sciences have measured, modeled, and speculated on the interaction of water with silicate melts as a function of pressure. At the same time, glass and materials scientists have collected a considerable body of data on the effect of water on the properties of liquid and glassy silicates at 1 atmosphere (1.01325×105N m−2) and below. A special session on “Solubility and Transport Properties of Water in Silicate Melts” was held during the 1983 AGU Spring Meeting, May 30–June 3, in Baltimore. The session had three main objectives: (1) review the present data base and discuss the status of current models in order to identify areas where further work is needed; (2) introduce interested geologists to the large body of work being carried out in the glass and materials sciences; and (3) consider static properties, such as thermodynamic relations, structure of hydrous melts, and dynamic properties including diffusion and viscosity. This report summarizes the major topics discussed. More detailed information may be found in the published abstracts (Eos, May 3, 1983, pp.
ISSN:0002-8606
DOI:10.1029/EO065i003p00019
年代:1984
数据来源: WILEY
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4. |
Geophysics in the Affairs of Man: A Personalized History of Exploration Geophysics and Its Allied Sciences of Seismology and Oceanography |
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Eos, Transactions American Geophysical Union,
Volume 65,
Issue 3,
1984,
Page 20-20
Carl Kisslinger,
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摘要:
This book traces the developments of the applications of the geophysical sciences to a variety of societal needs from misty beginnings to now, with emphasis on the “golden age,” the early 1920s through the 1960s. The phrase “applied geophysics” is so often taken as synonymous with “geophysical exploration” that the broader viewpoint of this work is especially welcome. The authors certainly devoted much of their treatment to exploration geophysics, as is appropriate in view of the large commitment of human and financial resources to this endeavor and the practical importance of the results. However, they have also included interesting sketches of military applications of geophysical techniques and the important technological advances that have come from these, as well as much material on ocean science. Atmospheric and space science receives less detail
ISSN:0002-8606
DOI:10.1029/EO065i003p00020
年代:1984
数据来源: WILEY
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5. |
1983 Robert E. Horton Award |
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Eos, Transactions American Geophysical Union,
Volume 65,
Issue 3,
1984,
Page 22-22
Peter S. Eagleson,
David A. Woolhiser,
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摘要:
The recipient of this year's American Geophysical Union Robert E. Horton Award is David A. Woolhiser of the U.S. Department of Agriculture's Agricultural Research Service. Dr. Woolhiser is Supervisory Research Hydraulic Engineer and Research Leader for Watershed Hydrology at the Southwest Rangeland Watershed Research Center in Tucson, Arizona. His academic training was at the University of Wisconsin, where he received degrees of Bachelor of Science and Doctor of Philosophy, both in Civil Engineering, and at the University of Arizona, where he received an M.S., also in Civil Engineering.Dr. Woolhiser's career has spanned government and academia and his contributions to hydrology have ranged from theoretical developments to practical applications
ISSN:0002-8606
DOI:10.1029/EO065i003p00022
年代:1984
数据来源: WILEY
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