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Author(s): Berger WH; Patzold K; Wefer G
Title: A case for climate cycles: Orbit, sun and moon
Source: CLIMATE DEVELOPMENT AND HISTORY OF THE NORTH ATLANTIC REALM : 101-123
Date: 2002
Document Type: B : Proceedings Paper
DOI:
Language: English
Comment:
Address: Univ Calif San Diego, Calif Space Inst, La Jolla, CA 92093 USA.
Reprint: Berger, WH, Univ Calif San Diego, Calif Space Inst, La Jolla, CA 92093
USA. E-mail:
Author Keywords:
KeyWords Plus: SOLAR IRRADIANCE; LAST MILLENNIUM; AFRICAN MONSOON; NORTH-AMERICA;
ICE-CORE; OCEAN; TEMPERATURE; VARIABILITY; OSCILLATIONS; RECORD
Abstract: The success of Milankovitch Theory - which states that ice age cycles are real and are a result of orbital forcing - has made climate cycle research thoroughly respectable. This; was not the case when E. Bruckner (1862-1927) pioneered climate cycles on the scale of decade-to.-century, for the last 1000 years, publishing a century ago. In the last 20 years or so, Bruckner's claim that climate cycles exist at this scale has received much support. Work on solar-forced climate cycles suggests that such cycles interfere with the assessment of human-induced global warming. A portion of the general warming observed over the last century may be owing to solar activity. If so, this shows considerable sensitivity of climate to modest changes in forcing. The original Bruckner cycle of 35 years is here suggested to be of tidal origin (twice the lunar perigee period). Likewise, the 1470-y Greenland cycle is proposed to be tidal in nature (as a beat between nodal and perigee cycles, effective during the summer season).
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