摘要:

Historical listings of instrumentally recorded earthquakes raise serious questions about the validity and usefulness of the long‐held presumption that the interiors of ocean plates are aseismic stable masses. Unusual distributions of epicenters within these regions may indicate stress patterns resulting from plate motions, or may indicate nascent subduction zones, ridge systems, or hot spots.Data recorded on ocean‐bottom hydrophones and seismometers in an earlier investigation [Walker and McCreery, 1988] revealed 28 intraplate earthquakes in the deep interior of the Northwestern Pacific Basin that were unreported by the worldwide network of land‐based seismic stations. The data sources included drum recordings of hydrophones near Wake and Enewetok islands in operation for different time intervals from 1963 through 1969, tape recordings from a 9‐element 1500‐km‐long linear array of hydrophones in operation for 2 months in 1981, and tape recordings from September 1982 through 1985 of an 8‐element hydrophone array nea

ISSN:0002-8606    

DOI:10.1029/89EO00378

年代:1989

数据来源: WILEY

摘要:

In reply to your request for suggestions for a new name for the Solar‐Planetary Relations Section of AGU (“SPR: The Right Name?”Eos, August 1, p. 747) I strongly support changing the name to “Space Physics” without further elaboration. It is to be tacitly understood that the space whose physics we are studying specifically includes the regions occupied by the neutral and ionized upper atmospheres of all Solar System bodies (Sun, planets, moons, comets), their magnetospheres, interplanetary space (which may or may not be considered as part of the upper atmosphere and magnetosphere of the Sun) and the heliospheric boundary region (which, incidentally, is not covered by the name SPR).I also would like to suggest that Journal of Geophysical Research‐Atmospheres change its order of articles. Thus articles on the thermosphere of Venus, for example, should be published side by side with articles on Earth's thermosphere and not in a separate “plane

ISSN:0002-8606    

DOI:10.1029/89EO00379

年代:1989

数据来源: WILEY

摘要:

For the first time, experiments have shown in detail how acid clouds can damage high‐elevation forests in eastern North America.The study focused on the way that acidic clouds affect red spruce, a dominant species in some eastern forests. Devastated stands of coniferous trees atop Whiteface Mtn,. N.Y., Mount Mitchell, N.C., and Camel's Hump, Vt., have become highly visible reminders of the damage that can be caused by acid deposition, which results primarily from fossil fuel combustio

ISSN:0002-8606    

DOI:10.1029/89EO00382

年代:1989

数据来源: WILEY

摘要:

It is worth plowing, through House Report 101–309 for insight into the relationship between Congress and a federal agency. The report reveals that Congress was so annoyed by the budget request from the National Science Foundation that it ordered NSF to submit by the end of January 1990 a description of how it sets priorities.The House Subcommittee on Science, Research and Technology was asked by Robert Roe (D‐N.J.), chairman of the full Science, Space, and Technology committee, to review the fiscal year 1990 budget request and three‐year budget projection from NSF, now that the agency has multiyear authoriz

ISSN:0002-8606    

DOI:10.1029/89EO00386

年代:1989

数据来源: WILEY

摘要:

At its 1986 General Assembly in Bern, Switzerland, the International Council of Scientific Unions (ICSU) launched what promises to be the biggest and most ambitious enterprise of international scientific cooperation (see “ICSU Gives Green Light to IGBP,”Eos, 67, p. 777, 1986). The International Geosphere‐Biosphere Program (IGBP), known also as “Global Change,” has as its main objective to describe and understand the interactive physical, chemical and biological processes that regulate the total Earth system, the unique environment that it provides for life, the changes that are occurring in this system, and the manner in which they are influenced by human actions.It should be no wonder, then, that this year's ICSU General Committee Meeting at the Academia das Ciencias de Lisboa (Lisbon, Portugal, October 11–14) was virtually dominated by IGBP matters, even during the discussion of agenda items that did not include this subject explicitly. It is fair to say that the Unions are just becoming fully aware of the real magnitude of the program they themselves helped launch in Bern in 1986—and of how little input and control they have had so far in its development. An indication of this “awakening” was already apparent during the ICSU General Assembly in Beijing in 1988, but the full realization of the enormous impact and ramifications of IGBP inside and outside ICSU is

ISSN:0002-8606    

DOI:10.1029/89EO00388

年代:1989

数据来源: WILEY

摘要:

The American Geological Institute sponsors undergraduate and graduate geoscience scholarships for members of ethnic minority groups. U.S. citizens who are majoring in geology, geophysics, geochemistry, hydrology, meteorology, oceanography, planetary geology, or Earth science education, and who are Black, Hispanic or Native American are eligible.Undergraduate awards can be as large as $10,000 a year; graduate awards, $4000 a year. Application deadline is February 1, 1990. Contact AGI Minority Participation Program Scholarships, American Geological Institute, 4220 King Street, Alexandria, VA 22302‐1507; tel. 703‐379

ISSN:0002-8606    

DOI:10.1029/EO070i050p01554-02

年代:1989

数据来源: WILEY