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1. |
ROV samples vents on Juan de Fuca Ridge |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 15,
1993,
Page 177-182
Robert W. Embley,
James M. Franklin,
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摘要:
In 1991, the JASON Remotely Operated Vehicle (ROV) successfully performed high‐resolution imaging within complex vent fields on the northern Juan de Fuca Ridge. From June 22 to July 16, 1992, a team of Canadian and U.S. scientists and engineers joined in an expedition to develop sampling capabilities for a HYSUB 5000 ROV in a mid‐ocean ridge hydrothermal vent environment. Our experience on the Juan de Fuca Ridge is another starting point for pursuing the science capabilities of deep‐water ROVs.The Remotely Operated Platform for Ocean Science (ROPOS) was built by International Submarine Engineering and is operated by the Institute of Ocean Sciences in Sidney, British Columbia. The cruise was staged off the National Oceanic and Atmospheric Administration's shipDiscoverer, based at NOAA's Pacific Marine Center in Seattle, Wash. Support for the expedition came from the Department of Fisheries and Oceans Canada, the Department of Energy Mines and Resources Canada, the NOAA Vents Program, and the Natural Sciences and Engineering Research Council C
ISSN:0002-8606
DOI:10.1029/93EO00163
年代:1993
数据来源: WILEY
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2. |
Environmental impact of population growth |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 15,
1993,
Page 178-179
Rosamond Naylor,
Pamela Matson,
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摘要:
Earth's population currently numbers 5.4 billion; even given optimistic assumptions for reduction in growth rates, the number will double by the middle of the next century with most of the increase in the developing countries. Rapid population growth in the developing world raises the fundamental dilemma of how to alleviate chronic hunger and poverty in the short run while preserving the atmosphere and ecosystem services required for long‐term human and biospheric sustenance. This dilemma, and the compromises required to solve it, were discussed by twenty‐five researchers from five countries at the Aspen Global Change Institute 1992 Summer Science Session III, Food, Conservation, and Global Environmental Change: Is Compromise Possible?, held from August 16 to 28, in Aspen, C
ISSN:0002-8606
DOI:10.1029/93EO00254
年代:1993
数据来源: WILEY
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3. |
Geophysical activities in Mexico |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 15,
1993,
Page 179-179
J. Umutia‐Fucugauchi,
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摘要:
The Union Geofisica Mexicana (UGM) annual meeting provides an opportunity for presentation and discussion of ongoing research activities in Mexico in the various disciplines of Earth sciences. Because a substantial amount of geophysical data gathered in Mexico remains largely unpublished or is published in internal reports of restricted circulation, the meeting has become an important forum for local and foreign researchers. The meeting attracts geoscientists, students, and professionals from universities, research centers, government institutions, and industry. Although many research groups from the United States and other countries are currently conducting studies in Mexico in such diverse fields as seismology, tectonics, volcanology, economic geology, and geohydrology, participation from those groups is not as large as expected or desired.
ISSN:0002-8606
DOI:10.1029/93EO00351
年代:1993
数据来源: WILEY
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4. |
EqPac benthic leg completed |
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Eos, Transactions American Geophysical Union,
Volume 74,
Issue 15,
1993,
Page 180-181
James McManus,
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PDF (205KB)
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摘要:
In December 1992, the U.S. JGOFS Equatorial Pacific Process Study (EqPac) completed a 43‐day cruise on which benthic processes affecting carbon fluxes were studied. One of the major goals of EqPac is to understand the role of deep water and benthic processes on the cycling and ultimate removal of carbon and related elements from the oceans.Like the other U.S. JGOFS EqPac studies, the benthic expedition followed a track along 140°W from 12°S to 9°N. Data from deep hydrocasts, in‐situ measurements of benthic fluxes, and several coring techniques were used to test four hypotheses: that benthic fluxes and burial rates are a function of particle rain rate, bottom‐water chemistry, and bioturbation; that regions of high burial and benthic flux coincide with areas of surface upwelling and enhanced primary production; that destruction of particulate organic matter below a depth of 1 km in the ocean is dominated by the decomposition that takes place in surface sediments; and that accumulation of biogenic phases in surface sediments is proportional to the present‐day export production modified by bent
ISSN:0002-8606
DOI:10.1029/93EO00269
年代:1993
数据来源: WILEY
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