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1. |
The Freja satellite mission |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 29,
1993,
Page 321-324
Rickard Lundin,
Gerhard Haerendel,
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摘要:
Freja, a Swedish and German scientific satellite, was launched successfully on October 6, 1992. Novel plasma instruments give Freja the capability to increase the spatial/temporal resolution orders of magnitudes above that previously achieved on satellites. Freja's high spatial/temporal resolution permits studies of meso‐ and micro‐scale phenomena in the 100‐m range for particles and in the 10‐m range for electric and magnetic fields. The on‐board ultraviolet imager will resolve auroral structures of kilometer size, that is, about an order of magnitude better than Viking (see
ISSN:0002-8606
DOI:10.1029/93EO00394
年代:1993
数据来源: WILEY
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2. |
Major surge of the Bering Glacier |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 29,
1993,
Page 322-322
Bruce Molnia,
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摘要:
Definitive evidence has been obtained in the last few weeks documenting that a new and potentially major surge of Bering Glacier is beginning. According to Bruce F. Molnia, U.S. Geological Survey, Reston, Va., and spokesperson for a USGS research group that includes Austin Post, Dennis Trabant, and Robert Krimmel, as of June 28, several hundred kilometers of the glacier were involved in the surge, displaying intensive crevassing, displaced moraines, ice overriding previously exposed bedrock, and pressure ridge development (Figure 1).
ISSN:0002-8606
DOI:10.1029/93EO00582
年代:1993
数据来源: WILEY
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3. |
In Memoriam |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 29,
1993,
Page 323-323
Anonymous,
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摘要:
AGU FellowBrian O'Briendied last year at age 95. He had been a member of AGU (Space Physics and Aeronomy) since 1937.James F. Rychel died recently at age 37. He joined AGU (Geodesy) in 1984. Woody L. Cowan, 90, died on June 29. He had been a member of AGU (Hydrology) since 1940.
ISSN:0002-8606
DOI:10.1029/EO074i029p00323-03
年代:1993
数据来源: WILEY
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4. |
Hazardous crater lakes studied |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 29,
1993,
Page 325-325
Minoru Kusakabe,
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摘要:
Crater lakes usually sit on top of volcanic conduits and act as condensers of magmatic vapor. Studies of crater lakes can therefore provide information on both deep magmatic activity and variations in the degassing state of a shallow magmatic body. The Lake Nyos gas disaster of August 1986 and a similar event in August 1984 at Lake Monoun, both in Cameroon, resulted from the accumulation of magmatic CO2in the bottom layers of the lakes. Geochemical monitoring of crater lakes is a promising tool for forecasting not only limnic but also volcanic eruptions. Acid‐mineralized waters formed by condensation of hot magmatic volatiles in crater lakes are thought to bear some resemblance to hydrothermal fluids acting in the genesis of acid‐sulfate alteration and Au‐Cu‐Ag mineralization of volcanic‐hosted precious metal
ISSN:0002-8606
DOI:10.1029/93EO00398
年代:1993
数据来源: WILEY
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