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1. |
Are marine and nonmarine extinctions correlated? |
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Eos, Transactions American Geophysical Union,
Volume 69,
Issue 40,
1988,
Page 889-895
Michael R. Rampino,
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摘要:
Recent papers inEoshave debated the possible relationships between marine mass extinctions, comet showers, and volcanism [Alvarez, 1986;Officer and Grieve, 1986], and ail three might be linked [Rampino, 1987]. Moreover, asOfficer and Grieve[ 1986] point out, various other causes have been suggested for given extinction events, including changes in climate, ocean circulation, and sea level fluctuations, possibly related to plate tectonics and continental positions. Also under debate is the issue of whether mass extinctions were gradual, stepped, or geologically sudden events (see, for example,Hut et al. [1987]). A missing ingredient thus far in these debates has been the record of faunal diversity of nonmarine animals. Does this show any agreement with the marine extinction record?
ISSN:0002-8606
DOI:10.1029/88EO01139
年代:1988
数据来源: WILEY
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2. |
NOAA's Fisheries Oceanography Coordinated Investigations in the western Gulf of Alaska |
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Eos, Transactions American Geophysical Union,
Volume 69,
Issue 40,
1988,
Page 890-894
R. K. Reed,
J. D. Schumacher,
A. W. Kendall,
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PDF (563KB)
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摘要:
Efforts to understand the growth and decline of various commercial fish stocks in relation to their environment have a long history. For example, systematic studies of the northeast Atlantic started with the establishment of the International Commission for the Exploration of the Sea in 1902 [Mills, 1983]; a large part of this effort has been investigations of fisheries resources and surveys and descriptions of the physical environment (temperature, salinity, and circulation). Numerous other programs in “fishery oceanography” have had similar goals. A general premise in these studies has been that changes in abundance are related to biological and physical events that occur during the early life stages of f
ISSN:0002-8606
DOI:10.1029/88EO01143
年代:1988
数据来源: WILEY
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3. |
Galveston Symposium: Physical Oceanography of the Louisiana/Texas Continental Shelf |
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Eos, Transactions American Geophysical Union,
Volume 69,
Issue 40,
1988,
Page 894-895
Thomas M. Mitchell,
Murray Brown,
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PDF (171KB)
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摘要:
The Minerals Management Service (MMS), Gulf of Mexico Outer Continental Shelf (OCS) Region sponsored a symposium on the Physical Oceanography of the Louisiana/Texas (LA/TX) Shelf in Galveston, Texas, on May 24–26, 1988. The symposium brought together a number of physical oceanographers, meteorologists, and ecologists to discuss the state of knowledge and to begin the planning process for a long‐term study of shelf circulation covering the region from the mouth of the Mississippi River to approximately 24° latitude along the Mexican coast and from the shore out to a depth of approximately 500 m. The proposed study, to be a component of the ongoing MMS Environmental Studies Program, is expected to take place during the period 1989–1991. It is anticipated that the work will be done principally through contracts after a competitive procurement process. Specific charges to the participants were as follows:to assess the current state of knowledge concerning the circulation on the LA/TX shelfto identify significant gaps in that knowledgeto recommend a field measurement program to address these gapsto recommend a circulation modeling program for the LA/TX shelf that will improve MMS' oil spill risk assessmentsto identify and initiate coordination mechanisms and data‐sharing arrangements with other proposed researc
ISSN:0002-8606
DOI:10.1029/88EO01144
年代:1988
数据来源: WILEY
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