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1. |
A sunspot maximum prediction using a neural network |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 18,
1990,
Page 677-688
H. C. Koons,
D. J. Gorney,
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摘要:
Solar activity near the maximum of each 11‐year cycle causes a number of adverse effects on space systems. Satellites experience increased electrical charging of their surface and internal dielectric components, resulting in disruptive electrostatic discharges, and micro‐electronic devices experience upsets more often. Satellite communications links in the VHF/UHF range suffer signal fades more often and with greater severity. The increased atmospheric density increases the drag on satellites at low altitudes, causing difficulties in tracking and in predicting their orbit decay and time of reen
ISSN:0002-8606
DOI:10.1029/EO071i018p00677-01
年代:1990
数据来源: WILEY
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2. |
Hydrothermal activity in the Lau Basin: First results from the NAUTILAU Cruise |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 18,
1990,
Page 678-679
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摘要:
The Lau Basin, a back arc spreading center, is one of the most active hydrothermal areas in the ocean. A scientific team from France, Germany, and Tonga investigated the southern Lau Basin near Tonga in 1989 to study the processes of seafloor ore‐mineral formation associated with hydrothermal circulation along the volcanic Valu Fa ridge (Ride de Valu Fa in Figure 1), which lies in back of the Tonga‐Kermadec trench.Between April 17 and May 10 scientists on the R/VNadirused the submersibleNautileto make 22 dives in the southern Lau Basin. The cruise was called NAUTILAU, forNautilein Lau Basin. In addition to the standard equipment of the submersible (video and photo cameras, and temperature probe), a CTD (conductivity‐temperature‐depth) instrument was integrated with a “mini rosette” water sampling device used for the first time on theNautileto obtain correlations between the geological observations and the physical and chemical anomalies measured in t
ISSN:0002-8606
DOI:10.1029/90EO00166
年代:1990
数据来源: WILEY
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3. |
Margins: A new conceptual approach to continental margin research |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 18,
1990,
Page 679-688
John Mutter,
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摘要:
The geology of continents is to a large degree the geology of continental margins. The margins mark the site where materials that form major components of the continental crust are distilled from Earth's mantle and where continents grow through plate interactions that progressively incorporate these margins into the continental mass.Much of the continents consists of the remnants of ancient margins that offer an extensive and detailed record of continental evolution over time and space. Knowledge of this record is essential for understanding processes of global change, their diversity, and long‐term history. Unraveling this record is one of the major challenges in modern Earth science
ISSN:0002-8606
DOI:10.1029/90EO00167
年代:1990
数据来源: WILEY
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4. |
Edward A. Flinn, III, 1931”1989 |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 18,
1990,
Page 680-680
Anonymous,
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摘要:
Edward A. Flinn, III, 57, died of prostate cancer on August 13, 1989, after a long debilitating illness. He will be well remembered for his contributions to science as well as his human qualities.Ted Flinn was an internationally renowned Earth scientist, expert particularly in the fields of seismology and space geodesy. Ted's most recent and probably greatest impact on the scientific community was in geodesy. As Chief of the National Aeronautics and Space Administration (NASA) Geodynamics Program, he directed a global research effort using laser‐ranging to satellites and to the Moon, together with radiation from quasars, to detect the motion and deformation of the Earth's crust. Under his leadership, the program expanded to include five other federal agencies and about 24 foreign countries. This spectacularly successful international cooperation is exemplary of Ted Flinn's broad vision and scop
ISSN:0002-8606
DOI:10.1029/EO071i018p00680-01
年代:1990
数据来源: WILEY
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5. |
Coastal oceanography |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 18,
1990,
Page 688-689
Ken Brink,
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摘要:
Coastal Ocean Processes (CoOP) is a new organization, formed with the encouragement of the National Science Foundation (NSF). Its goal is to organize the community of coastal oceanographers in planning for interdisciplinary coastal oceanography for the next 1–2 decades. We expect to help NSF with their planning for an enhanced effort in this field. NSF would like to begin funding CoOP work during Fiscal Year 1992. They have made it clear that, to obtain new funds, such work must be interdisciplinary in characte
ISSN:0002-8606
DOI:10.1029/90EO00168
年代:1990
数据来源: WILEY
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6. |
Acoustical oceanography |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 18,
1990,
Page 689-689
Anonymous,
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摘要:
The Acoustical Society of America has formed a Technical Specialty Group on Acoustical Oceanography. At ASA meetings the new group will have special sessions where they will give invited and contributed papers and have panel discussions about ocean parameters that are measured effectively by acoustical techniques.The first special sessions will be May 22–23, 1990, at the ASA meeting at Pennsylvania State University, University Park. The focus on May 22 will be acoustical techniques for detection and measurement of internal waves and turbulence; conveners are Robert Pinkel of Scripps Institution of Oceanography, La Jolla, Calif., and Herman Medwin of the Naval Postgraduate School, Monterey, Calif. Acoustical studies of the physical and biological characteristics of ocean mass boundaries are the discussion topic on May 23. The convener is C. S. Clay, University of Wisconsin, Madiso
ISSN:0002-8606
DOI:10.1029/EO071i018p00689
年代:1990
数据来源: WILEY
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7. |
Seafloor quake detector |
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Eos, Transactions American Geophysical Union,
Volume 71,
Issue 18,
1990,
Page 690-690
Anonymous,
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PDF (1597KB)
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摘要:
New seafloor seismic equipment designed at Sandia National Laboratories in Albuquerque, N. Mex., has shown greater sensitivity to earthquakes and a longer lifespan than earlier models. The Seafloor Earthquake Measurement System (SEMS) will monitor undersea seismic disturbances off the southern California coast for the next 8 years, gathering information to aid in the design of earthquake‐resistant offshore oil platform
ISSN:0002-8606
DOI:10.1029/EO071i018p00690-01
年代:1990
数据来源: WILEY
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