Nature of surface flow in the earth's central core : [prepared for National Aeronautics and Space Administration]

by Ernest H. Vestine, Richard Henry Ball, Anne B. Kahle

Purchase Print Copy

 FormatList Price Price
Add to Cart Paperback36 pages $20.00 $16.00 20% Web Discount

The contribution to secular change made by the nonuniform velocity of the fluid at the surface of the earth's core in the presence of the earth's main field is described. It is shown that contributions to secular change made by temporal changes in the flow pattern of the fluid may be important. Results are discussed qualitatively in relation to dynamo theories of the earth's main field. It is also shown that surface fluid motions that can very nearly reproduce secular change also show features compatible with the generator models of Bullard, Herzenberg, Parker, and Tverskoy. The degree of compatibility found does not allow a preferred choice among these various generators.

This report is part of the RAND Corporation Research memorandum series. The Research Memorandum was a product of the RAND Corporation from 1948 to 1973 that represented working papers meant to report current results of RAND research to appropriate audiences.

Our mission to help improve policy and decisionmaking through research and analysis is enabled through our core values of quality and objectivity and our unwavering commitment to the highest level of integrity and ethical behavior. To help ensure our research and analysis are rigorous, objective, and nonpartisan, we subject our research publications to a robust and exacting quality-assurance process; avoid both the appearance and reality of financial and other conflicts of interest through staff training, project screening, and a policy of mandatory disclosure; and pursue transparency in our research engagements through our commitment to the open publication of our research findings and recommendations, disclosure of the source of funding of published research, and policies to ensure intellectual independence. For more information, visit www.rand.org/about/principles.

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.