摘要:

Shortly after its accretion, Earth was both hot and heterogeneous, according to Don Anderson of the Seismological Laboratory at the California Institute of Technology (Caltech) in Pasadena, President‐Elect of AGU. In a talk to be presented at the 1987 AGU Fall Meeting in San Francisco, Anderson draws on advances in seismology, petrology, and geochemistry for a hypothesis that Earth's mantle has been well differentiated, made up of concentric layers of different kinds of rock, throughout its histor

ISSN:0002-8606    

DOI:10.1029/EO068i047p01609-01

年代:1987

数据来源: WILEY

ISSN:0002-8606    

DOI:10.1029/EO068i047p01610-01

年代:1987

数据来源: WILEY

摘要:

Ambitious new integrated multidisciplinary programs in environmental sciences are being organized by national and international groups. Although the initiatives go under various names, the common theme is a global approach to studying interactions among the biosphere, atmosphere, hydrosphere, and lithosphere.The International Council of Scientific Unions has begun the International Geosphere‐Biosphere Program, supported by the National Academy of Sciences. The National Science Foundation started its Global Geoscience Program in 1986. The National Aeronautics and Space Administration (NASA) and National Oceanic and Atmospheric Administration have been working on Earth System Science since 198

ISSN:0002-8606    

DOI:10.1029/EO068i047p01611

年代:1987

数据来源: WILEY

摘要:

There is a growing awareness by both scientists and policy makers of the importance of understanding Planet Earth as a single interactive environmental system. This is reflected by major programs of action like the International Geosphere‐Biosphere Program (IGBP). According to the booklet “Global Change,” which covers the U.S. efforts in this area (National Academy of Sciences (NAS), 1986, pp. 3–4), the IGBP‐Global Change Program calls for integrated study of the physical, chemical, and biological processes that have produced and now maintain the environment needed for life on earth. Such a program would be based on a well‐planned series of observations and modeling and process studies. It should also include increased efforts to recover a much longer history of the Earth and its environment, from geological records and the records preserved in trees and ice, for we recognize that changes on a wide range of time scales, from years to hundreds of millions of years, are a significant feature of earth history. Knowledge of the past is essential to the tasks of understanding the present or predicting

ISSN:0002-8606    

DOI:10.1029/EO068i047p01617

年代:1987

数据来源: WILEY

摘要:

You can extend your commitment to the continuing vitality of geophysics by helping AGU to build funds that will provide for new initiatives and assist in funding some of the nonrevenue programs of AGU, such as the congressional science fellowship, minority student scholarships, and student travel grants. The AGU Development Committee is seeking gifts and contributions toward building the endowment of the Union: The vitality of AGU and the vitality of geophysics march hand in hand.

ISSN:0002-8606    

DOI:10.1029/EO068i047p01618

年代:1987

数据来源: WILEY