1. |
Roving for rocks on the red planet: The Mars Pathfinder Mission |
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Eos, Transactions American Geophysical Union,
Volume 77,
Issue 49,
1996,
Page 477-481
M. Golombek,
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摘要:
Mars is the most Earth‐like planet in our solar system. After Earth, it is the only other planet that is capable of supporting life. Recent scientific evidence suggests that life did once exist on Mars and makes the planet a doubly exciting target for exploration. Mars is a unique terrestrial planet. Evidence suggests it underwent major climatic changes and has a geologic record of surface rocks that spans the entire history of the solar system. The geologic record suggests that early climate on Mars was warmer and wetter, and that liquid water—a requirement for life—may have been present. Studying the geological, climatological, and exobiological conditions of Mars may provide the data science needs to address the almost theological question of: “Are we alone in the un
ISSN:0002-8606
DOI:10.1029/96EO00322
年代:1996
数据来源: WILEY
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2. |
Tropospheric chemistry: Global change and urban neglect |
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Eos, Transactions American Geophysical Union,
Volume 77,
Issue 49,
1996,
Page 490-490
Sanford Sillman,
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摘要:
During the past decade, major advances have been made in the field of tropospheric chemistry, especially with regard to ozone and associated species (reactive nitrogen, peroxides, and OH). These advances have been driven largely by a series of field measurement campaigns in locations ranging from Brazil and Hawaii to Greenland and Nova Scotia. There is a major gap in the coverage of the tropospheric research program, however. Ozone chemistry is not measured in urban and downwind locations in the United States that are subject to violations of air quality standards.
ISSN:0002-8606
DOI:10.1029/96EO00324
年代:1996
数据来源: WILEY
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3. |
Opal studied as a marker of paleoproductivity |
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Eos, Transactions American Geophysical Union,
Volume 77,
Issue 49,
1996,
Page 491-491
Olivier Ragueneau,
Aude Leynaert,
Paul Tréguer,
David J. Demaster,
Robert F. Anderson,
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摘要:
Biogenic silica, better known as opal, is one of the three biogenic components of pelagic sediments, along with carbonate and organic matter, and it is a powerful tool for understanding the carbon cycle of the present and past. Opal is formed in surface waters during the photosynthesis of siliceous phytoplankton such as diatoms. After cells die, they sink through the water column; the fraction that is not dissolved ultimately is buried in the underlying sediments. In the modern ocean, siliceous phytoplankton generates more than 50% of the biological pump of CO2.
ISSN:0002-8606
DOI:10.1029/96EO00325
年代:1996
数据来源: WILEY
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4. |
A note about JGR's citation rate |
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Eos, Transactions American Geophysical Union,
Volume 77,
Issue 49,
1996,
Page 493-493
Michael Carlowicz,
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摘要:
If you read the September 2 issue ofThe Scientist, you may have seen the statistics on citation rates for scientific journals and thought: “TheJournal of Geophysical Research (JGR)has really grown by leaps and bounds these last few years.” WhileJGRdoes continue to grow in size, influence, and excellence, its progress is not quite as astounding as the article made it s
ISSN:0002-8606
DOI:10.1029/96EO00327
年代:1996
数据来源: WILEY
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