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1. |
What is a plasma instability? |
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Eos, Transactions American Geophysical Union,
Volume 73,
Issue 49,
1992,
Page 529-533
S. Peter Gary,
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PDF (283KB)
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摘要:
Just as a heated solid will melt into a liquid and a liquid heated further will evaporate into a gas, so will a gas subjected to yet further thermal input become ionized. In other words, if the atoms or molecules of a gas are given sufficient thermal energy, particle collisions can tear individual electrons away from these neutral particles, so that the gas becomes a plasma, or a collection of negatively charged electrons and positively charged ions. Thus, the hot, dense fluid of the Sun's atmosphere becomes a plasma at sufficiently high altitudes, and that state is maintained as this atmosphere expands outward to form the solar wind.Ultraviolet radiation can also kick electrons out of their atomic or molecular orbits. If a planet has a neutral atmosphere, that atmosphere acts as a shield against the ionizing effects of such radiation from the Sun. But at sufficiently high altitudes, the tenuous atmosphere is ionized by solar ultraviolet radiation to form the planetary ionosphere and magnetosphere. Thus, plasma is the primary constituent of both planetary magnetospheres and the interplanetary medium.
ISSN:0002-8606
DOI:10.1029/91EO00388
年代:1992
数据来源: WILEY
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2. |
WHOI Receives $500,000 Grant |
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Eos, Transactions American Geophysical Union,
Volume 73,
Issue 49,
1992,
Page 530-530
Anonymous,
Preview
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PDF (160KB)
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摘要:
The Woods Hole Oceanographic Institution (WHOI) has received a $500,000 grant from the Palisades Geophysical Institute, Inc., to establish the J. Lamar Worzel Assistant Scientist Fund. WHOI must raise an additional $500,000 to match the challenge grant. The $1 million will be used as endowment to support bright, young scientists pursuing careers in geophysical oceanography at WHOI.
ISSN:0002-8606
DOI:10.1029/91EO00390
年代:1992
数据来源: WILEY
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3. |
In Memoriam |
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Eos, Transactions American Geophysical Union,
Volume 73,
Issue 49,
1992,
Page 531-531
Anonymous,
Preview
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PDF (160KB)
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摘要:
Just as a heated solid will melt into a liquid and a liquid heated further will evaporate into a gas, so will a gas subjected to yet further thermal input become ionized. In other words, if the atoms or molecules of a gas are given sufficient thermal energy, particle collisions can tear individual electrons away from these neutral particles, so that the gas becomes a plasma, or a collection of negatively charged electrons and positively charged ions. Thus, the hot, dense fluid of the Sun's atmosphere becomes a plasma at sufficiently high altitudes, and that state is maintained as this atmosphere expands outward to form the solar wind.Ultraviolet radiation can also kick electrons out of their atomic or molecular orbits. If a planet has a neutral atmosphere, that atmosphere acts as a shield against the ionizing effects of such radiation from the Sun. But at sufficiently high altitudes, the tenuous atmosphere is ionized by solar ultraviolet radiation to form the planetary ionosphere and magnetosphere. Thus, plasma is the primary constituent of both planetary magnetospheres and the interplanetary medium.
ISSN:0002-8606
DOI:10.1029/EO073i049p00531-01
年代:1992
数据来源: WILEY
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4. |
Self‐similarity: Theory and applications in hydrology |
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Eos, Transactions American Geophysical Union,
Volume 73,
Issue 49,
1992,
Page 532-532
Efi Foufoula‐Georgiou,
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PDF (307KB)
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摘要:
There is a range of spatial and temporal scales over which measurements are difficult to make and interpret. Understanding, modeling, and prediction of hydrologic processes are needed for this broad range. Questions concerning quantitative interscale relationships of atmospheric, surface, and subsurface processes are at the heart of hydrologic research and are expected to play a key role in understanding large‐scale behavior of hydrologic fluxes and processes. A special session, “Self‐Similarity in Hydrologic Processes: Identification, Estimation, and Use in Modeling/Measurement/Prediction,” was held at the AGU 1991 Fall Meeting to address scaling issues in hydrologic ph
ISSN:0002-8606
DOI:10.1029/91EO00392
年代:1992
数据来源: WILEY
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