Global Climate Change

Most of the last 100,000 years or longer has been characterized by large, abrupt, regional-to-global climate changes. Agriculture and industry have developed during anomalously stable climatic conditions. New, high-resolution analyses of sediment cores using multiproxy and physically based transfer...

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Published inProceedings of the National Academy of Sciences - PNAS Vol. 96; no. 18; pp. 9987 - 9988
Main Authors Alley, Richard B., Lynch-Stieglitz, Jean, Severinghaus, Jeffrey P.
Format Journal Article
LanguageEnglish
Published United States National Academy of Sciences of the United States of America 31.08.1999
National Acad Sciences
National Academy of Sciences
The National Academy of Sciences
SeriesFrom the Academy
Subjects
Agriculture
Alleys
Climate
Climate change
Climate models
Dendroclimatology
From the Academy
Geology
Global climate models
Global warming
Greenhouse Effect
Human Activities
Humans
Ice sheets
Industry
Oceans
Sediments
Temperature gradients
Time
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Summary:Most of the last 100,000 years or longer has been characterized by large, abrupt, regional-to-global climate changes. Agriculture and industry have developed during anomalously stable climatic conditions. New, high-resolution analyses of sediment cores using multiproxy and physically based transfer functions allow increasingly confident interpretation of these past changes as having been caused by "band jumps" between modes of operation of the climate system. Recurrence of such band jumps is possible and might be affected by human activities.
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This paper is a summary of a session presented at the tenth annual symposium on Frontiers of Science, held November 19–21, 1998, at the Arnold and Mabel Beckman Center of the National Academies of Sciences and Engineering in Irvine, CA.
To whom reprint requests should be addressed. E-mail: ralley@essc.psu.edu.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.96.18.9987