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1. |
NSF's role in Antarctic environment scrutinized |
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Eos, Transactions American Geophysical Union,
Volume 72,
Issue 22,
1991,
Page 241-242
Susan Bush,
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摘要:
In the last few years, the National Science Foundation has come under criticism by environmental groups for inadequate stewardship in the U.S. Antarctic Program's environmental issues. Since 1978, NSF was given full responsibility, by Executive Order, for budgeting and managing the entire U.S. national program in Antarctica, including logistics support. NSF has also been responsible for the compliance of the U.S. Antarctic Program with environmental protection measures agreed to by the Antarctic Treaty nations.Specifically under fire by environmentalists have been NSF's maintenance of a land‐fill, open‐air burning of solid waste, and the removal of toxic substances. According to Peter E. Wilkniss, director of the Division of Polar Programs at NSF, open burning is no longer taking place and will not be allowed in the fut
ISSN:0002-8606
DOI:10.1029/EO072i022p00241-03
年代:1991
数据来源: WILEY
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2. |
An Allen receives Vannevar Bush Award |
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Eos, Transactions American Geophysical Union,
Volume 72,
Issue 22,
1991,
Page 242-
Anonymous,
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摘要:
James A. Van Allen, an internationally known pioneer in space science research and education, was recently honored with the National Science Board's Vannevar Bush Award. Van Allen, who served as AGU president from 1982 to 1984, “has pioneered with vision, boldness, and drive the discovery and exploration of new frontiers in space science,” commented Mary Good, NSB chair. “His career as a scientist and mentor reflects hard work, frugality, and devotion to education.”The award acknowledges outstanding contributions in science and technology that are significant to the national welfare. It was named after Vannevar Bush, director of the Office of Scientific Research and Development during World War II, who managed the first successful federal efforts to support large‐scale scientific research. In receiving the award, Van Allen was recognized for his long and productive career in space science, including his discovery of the radiation belt around Earth (the Van Allen belt), his advocacy of the use of satellites for exploring the planets, his role as a government advisor on space science policy, and his effectiveness and dedication as an educator of young s
ISSN:0002-8606
DOI:10.1029/EO072i022p00242-02
年代:1991
数据来源: WILEY
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3. |
Hydrology Sessions at 1990 Fall AGU Meeting |
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Eos, Transactions American Geophysical Union,
Volume 72,
Issue 22,
1991,
Page 243-244
Roger C. Bales,
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摘要:
A total of 380 papers were presented in 32 half‐day hydrology sessions at the 1990 Fall AGU Meeting, December 3–7 in San Francisco, including those organized by AGU's Snow, Ice and Permafrost committee.About half of the sessions focused on sub‐surface hydrology, with surface‐water hydrology, snow and ice, and water quality making up the balance. Session chairs contributed the following highlights.Ice‐stream mechanics was a dominant theme of two of the three well‐attended sessions on glaciers and ice sheets. Ice streams are narrow zones of fast‐flowing ice within the Greenland and Antarctic ice sheets that dominate the outflux of ice from the central regions of ice sheets to surrounding oceans. Recent interest in ice streams stems from the discovery that West Antarctic ice‐stream B is underlain by a meters‐thick layer of water‐saturated deforming sediment. The original discovery, inferred from seismic data, has now been completely confirmed by drilling to the base of the ice stream and sampling subglacial material. An early highlight was a report by Englehardt on the physical characteristics of these samples. Kamb then challenged the prevailing views by contending that shear deformation of subglacial sediment is subject to a vigorous instability that would result in much faster flow rates than are presently observed. In Kamb's view, the absence of extreme flow rates argues against an important role for subglacial deformation. Geophysical studies of West‐Antarctic ice streams are being extended by Bentley's group, colleagues from Ohio
ISSN:0002-8606
DOI:10.1029/90EO00189
年代:1991
数据来源: WILEY
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4. |
Chemical episodes in streams and lakes |
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Eos, Transactions American Geophysical Union,
Volume 72,
Issue 22,
1991,
Page 244-244
M. Robbins Church,
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摘要:
To provide a forum for discussion of recent advances in the studies of chemical episodes in lakes and streams was the purpose of “Episodic Chemical Changes in Streams and Lakes as Related to Acidic Deposition,“ a Hydrology section session at the 1990 AGU Fall Meeting in San Francisco. The session was cochaired by M. Robbins Church and Keith Eshleman.In recent years this topic has been of special concern to federal and state regulatory agencies because of the demonstrated contribution of acidic deposition to chemical episodes (via heavy rainstorms or snow‐melts) with consequent adverse effects on aquatic biota. With heightened public and regulatory agency concern has come increased funding for this topic and consequent advances in scientific understanding. We hosted a similar session at the 1989 AGU Fall Meeting, which drew some 36 oral and poster presentations. Work has continued apace in this field and the 1990 session drew 12 oral presentations and 9 po
ISSN:0002-8606
DOI:10.1029/EO072i022p00244
年代:1991
数据来源: WILEY
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