摘要:

Comets are renowned for their rapid evolution and for unexpected changes in their structure and brightness, particularly when they are within the inner part of the solar system. Because of this, up‐to‐date information on the development of the gas, dust, and ion production rates and of the ion tail structure of Comet Halley was required by scientists involved in the European Space Agency (ESA) Giotto mission throughout the spacecraft encounter period. It was obvious that images of the 1910 apparition, from the preperihelion period, or even from a week prior to encounter, would not be representative of the structure and activity during the encoun

ISSN:0002-8606    

DOI:10.1029/EO067i050p01385

年代:1986

数据来源: WILEY

摘要:

With the start of the 1987 fiscal year (FY) on October 1, 1986, the National Science Foundation (NSF) officially began conducting—with the explicit blessings of Congress—the United States' first large‐scale funded program for multidisciplinary cooperative global studies, an effort NSF calls “Global Geosciences.” The agency's budget commits about $35 million to global geosciences, which is the full amount that NSF originally requested from Congress in February 1986 (Eos, February 25, 1986, p.95). The $35 million represents an impressive increase of $18 million over the $17 million in the FY 1986 budget that NSF considers itself to have spent for global studies. “To propose an increase for global geosciences within an environment of shrinking budgets illustrates the level of commitment NSF attaches to this effort,” the agency's director, Erich Bloch, said earl

ISSN:0002-8606    

DOI:10.1029/EO067i050p01387-01

年代:1986

数据来源: WILEY

摘要:

Eosperiodically lists information on recently accepted doctoral dissertations in the disciplines of geophysics. Faculty members are invited to submit the following information, on institution letterhead, above the signature of the faculty advisor or department chairman:the dissertation title,author's name,name of the degree‐granting department and institution,faculty advisor,month and year degree was awarded,category of dissertation subject (Atmospheric Sciences, Hydrology, Ocean Sciences, Solid Earth, or Space Sciences).If possible, include the current address and telephone number of the degree recipient (this information will not be published

ISSN:0002-8606    

DOI:10.1029/EO067i050p01388

年代:1986

数据来源: WILEY