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File:Carbon-14-10kyr-Hallstadtzeit Cycles.png

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Summary

Description
English: Records of radiocarbon production, A, as measured in bi-decadal samples of wood (Δ14C) in which the age of the sample is known from counting tree rings (Damon and Sonnett, 1991) for the period from 10,000 calendar years ago to the present. B, Residual (detrended; dashed lines) record of Δ14C in which the long-term secular variation trend has been removed. The heavy red curve is a weighted smoothing function showing Hallstadtzeit Cycles with periodicities of about 2,000 years.
Date
Source http://pubs.usgs.gov/fs/fs-0095-00/
Author USGS
Permission
(Reusing this file)
Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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Original upload log

The original description page was here. All following user names refer to en.wikipedia.
Date/Time Dimensions User Comment
2017-01-27 04:56 1202×815× (103015 bytes) Taiwania Justo bigger file
2005-02-21 21:37 1024×384× (55487 bytes) SEWilco Red curve shows 2,000-year solar Hallstadzeit Cycles. {{PD-USGov-Interior-USGS}} Source: http://pubs.usgs.gov/fs/fs-0095-00/

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August 2000

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Date/TimeThumbnailDimensionsUserComment
current18:20, 27 January 2017Thumbnail for version as of 18:20, 27 January 20171,202 × 815 (101 KB)OgreBot(BOT): Reverting to most recent version before archival
18:20, 27 January 2017Thumbnail for version as of 18:20, 27 January 20171,024 × 384 (54 KB)OgreBot(BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2005-02-21 21:37:12 by SEWilco
04:57, 27 January 2017Thumbnail for version as of 04:57, 27 January 20171,202 × 815 (101 KB)Taiwania JustoTransferred from en.wikipedia

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