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1. |
Harold Jeffreys 1891–1989 |
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Eos, Transactions American Geophysical Union,
Volume 70,
Issue 14,
1989,
Page 209-209
Anonymous,
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摘要:
Sir Harold Jeffreys, renowned British seismologist, died on March 18, 1989, at the age of 97. A corresponding member of AGU since 1944, Jeffreys received AGU's highest honor, the William Bowie Medal, in 1952. He became a Fellow of the Union in 1962 and was later made an Honorary Fellow when that category was established. Jeffreys was associated for most of his professional life with St. John's College, Cambridge University, England.
ISSN:0002-8606
DOI:10.1029/EO070i014p00209-04
年代:1989
数据来源: WILEY
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2. |
Global differences between skin and bulk sea surface temperatures |
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Eos, Transactions American Geophysical Union,
Volume 70,
Issue 14,
1989,
Page 211-212
William J. Emery,
Peter Schluessel,
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摘要:
Infrared satellite imagery provides one of the best means of mapping changes in global sea surface temperature (SST). A series of workshops [Hilland et al., 1985], held to compare the various methods of remotely sensing SST, concluded that of the presently available systems, the Advanced Very High Resolution Radiometer (AVHRR), carried on National Oceanic and Atmospheric Administration (NOAA) polar‐orbiting weather satellites, yielded the smallest rms error when compared with ship and buoy in situ data. The widely used Multi Channel SST (MCSST) method, described byMcClain et al. [1983], was used to calibrate the AVHRR SST for this workshop intercomparison. This method uses the differences between the radiances of the two AVHRR thermal infrared channels to correct for atmospheric signal attenuation due primarily to water vapor absorption. To provide absolute temperature calibration, the MCSST coefficients are derived by matching the AVHRR observations with simultaneous SSTs measured in situ by freely drifting ocean buoys [McClain et al., 1985]. These drifting buoys typically measure the ocean temperature 0.5–1 m below the sea surf
ISSN:0002-8606
DOI:10.1029/89EO00113
年代:1989
数据来源: WILEY
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3. |
Snowbird II: Global catastrophes |
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Eos, Transactions American Geophysical Union,
Volume 70,
Issue 14,
1989,
Page 217-218
Clark R. Chapman,
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摘要:
Recently, on a National Public Radio retrospective on American life a quarter‐century ago, a commentator remarked that 1963 was one of the last years when we knew that the dinosaurs died out “because they were stupid, just plain too stupid,” and not due to some exotic mechanism. In 1989, catastrophic causes still reign supreme. Yet, in the public's mind, the controversy has not yet been settled: was it an asteroid, explosive volcanism, or a comet shower? Technical debates have raged since the late Luis Alvarez, his son Walter, and their Berkeley coworkers distributed preprints nearly a decade ago of their seminal paper [Alvarez et al., 1980] on the extraterrestrial cause for mass extinctions at the end of the Cretaceous Period. A recent conference, Global Catastrophes in Earth History, has shown that the debate is now mainly over. The meeting was held October 20–22, 1988, at Snowbird, Utah, and hereafter I refer to it as the “Snowbird II
ISSN:0002-8606
DOI:10.1029/89EO00116
年代:1989
数据来源: WILEY
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4. |
Promoting research in rock deformation |
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Eos, Transactions American Geophysical Union,
Volume 70,
Issue 14,
1989,
Page 219-219
Steve Kirby,
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摘要:
In response to informal discussions at the 1988 AGU Spring Meeting in Baltimore, Md., a dinner colloquium was held December 5, 1988, in San Francisco. Our purpose was to explore ways of promoting basic research in rock deformation, for which no professional organization exists that spans the full range of research interests. In spite of an informal distribution of announcements of the meeting, 54 people attended.Rock deformation is the materials science of the crystalline and amorphous materials that make up the solid Earth. As such, it includes not only the physical processes responsible for brittle and ductile deformation but also the important chemical processes that influence time‐dependent inelastic deformation. Consequently, there is a continuing need to engage interest and collaboration from materials scientists, mineral physicists, metallurgists, surface chemists, and geochemists in the study of the inelastic mechanical behavior of these complex material
ISSN:0002-8606
DOI:10.1029/89EO00117
年代:1989
数据来源: WILEY
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