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1. |
Federal Environmental R&D System examined |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 46,
1993,
Page 537-538
Susan Bucci Mockler,
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PDF (295KB)
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摘要:
The current federal efforts in environmental research and development and their effectiveness in meeting environmental needs for the future were the focus of a hearing held by the House Subcommittee on Technology, Environment, and Aviation on November 4. The current system operates through about twenty agencies and departments working within a $5 billion R&D budget.The committee is examining whether the system needs to be reorganized to make it more effective in anticipating and addressing current and emerging environmental concerns such as the loss of the ozone layer, loss of biodiversity, and quality of water and air.
ISSN:0002-8606
DOI:10.1029/93EO00679
年代:1993
数据来源: WILEY
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2. |
Statistical methods in physical oceanography |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 46,
1993,
Page 539-546
Peter Müller,
Greg Holloway,
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PDF (434KB)
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摘要:
Like many researchers, physical oceanographers deal with randomness and uncertainties when analyzing data or formulating models. Probability theory, statistical inference, and stochastic processes are applied. Space‐time averages are interpreted as ensemble averages, variances and spectra are estimated, and stochastic terms are added to dynamic equations. Analytical challenges more unique to the field arise when the huge amount of real or model ocean data and the complexities of ocean physics are considered. Algorithms for efficient data representation and analysis are sought and idealized dynamics that incorporate statistical and chaotic tendencies are explore
ISSN:0002-8606
DOI:10.1029/93EO00467
年代:1993
数据来源: WILEY
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3. |
McMurdo Dry Valleys of Antarctica |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 46,
1993,
Page 540-540
Robert A. Wharton,
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PDF (150KB)
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摘要:
The largest relatively ice‐free region on the Antarctic continent is the McMurdo Dry Valleys, located along the western coast of the Ross Sea. The term dry valleys refers to the deeply incised, ice‐free valleys that run perpendicular to the coast. The dry valleys were formed by the advances and retreats of glaciers through the coastal ranges of the Transantarctic Mountains, which rise to several thousand meters above sea level and actas barriers to the flow of ice from the Polar Plateau. Glacial and periglacial features are a major component of the landscape, and the valleys contain numerous closed basins in which perennially ice‐covered lakes are
ISSN:0002-8606
DOI:10.1029/93EO00550
年代:1993
数据来源: WILEY
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4. |
Vincent J. Schaefer (1906–1993) |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 46,
1993,
Page 541-542
Earl G. Droessler,
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PDF (1360KB)
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摘要:
In 1946, Vincent Schaefer carried out two simple experiments, the results of which echoed around the world in the meteorological research community.As the afternoon temperatures in the General Electric Research Laboratory at Schenectady, N.Y., inched higher on a hot day in 1946, Schaefer noticed that his cold box (an ordinary home freezer he had lined with black velvet and into which was directed a narrow beam of light) was not as cold as usual, so he placed a block of dry ice in the bottom of the freezer. Within seconds the entire cloud of water droplets in the cold box was turned into millions of tiny, sparkling ice crystals. Serendipitously, Schaefer found the trigger that converted super‐cooled droplets into ice crystal
ISSN:0002-8606
DOI:10.1029/93EO00684
年代:1993
数据来源: WILEY
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5. |
A new geomagnetic observatory network? |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 46,
1993,
Page 542-542
J. R. Heirtzler,
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PDF (1226KB)
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摘要:
Input and comments are solicited for a study of the network of geomagnetic observatories. Although there are some 200 geomagnetic observatories around the world recording the intensity and direction of the geomagnetic field, they were established over the last 2 centuries without any overall plan and do not satisfy many of today's scientific and technical needs.As a follow‐on to the National Geomagnetic Initiative Report currently being prepared, a small task group has been established with the encouragement of the U.S. Geodynamics Committee of the National Research Council's Board on Earth Sciences and Resources. The group consists of J. Heirtzler, chair, coordination, agency contacts; J. Booker, portable magnetometer arrays; A. Chave, seafloor observatories; A. W. Green, rapid data archiving; R. Langel and N. Peddle, optimum station distributio
ISSN:0002-8606
DOI:10.1029/93EO00685
年代:1993
数据来源: WILEY
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