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Global Climate Change DigestArchives of the
Global Climate Change Digest

A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999

FROM VOLUME 5, NUMBER 11, NOVEMBER 1992

PROFESSIONAL PUBLICATIONS...
TREND ANALYSIS: BOREHOLE TEMPERATURE TRENDS


Item #d92nov27

"Geothermal Evidence from Canada for a Cold Period before Recent Climatic Warming," K. Wang (Pac. Geosci. Ctr., Geol. Survey Canada, Sidney, B.C. V8L 4B2, Can.), T.J. Lewis, Science, 256(5059), 1003-1005, May 15, 1992.

High-accuracy temperature logs from three deep boreholes in a small area of Quebec show that recent climatic warming was preceded by a cold period near the end of the 19th century in that area. This result is consistent with results from other areas in Canada.


Item #d92nov28

"Underground Temperature Fields and Changing Climate: Evidence from Cuba," V. Cermák (Geophys. Inst., Czech. Acad. Sci., 141-31 Prague 4, Czech.), L. Bodri, J. Safanda, Global Planet. Change, 5(4), 325-337, 1992.

Application of heat conduction theory to data from 30 boreholes distributed within Cuba consistently shows a surface warming of 2-3 ° C during the last 200-300 years. The climatic effect has been possibly combined with the influence of forest clearing in most areas 100-200 years ago.

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