High-resolution records of Be-10 in endogenic travertine from Baishuitai, China: A new proxy record of annual solar activity?

The accurate reconstruction of past solar activity is a prerequisite for assessing the role of solar forcing on climate variations. Cosmogenic Be-10, produced by galactic cosmic rays and stored in natural archives such as ice cores and lake sediments, has been shown to be the most reliable as an ind...

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Bibliographic Details
Published in:Quaternary Science Reviews
Main Authors: Xu, Hongyang, Miyahara, Hiroko, Horiuchi, Kazuho, Matsuzaki, Hiroyuki, Sun, Hailong, Luo, Weijun, Zheng, Xiangmin, Suganuma, Yusuke, Wang, Shijie, Zhou, Limin
Format: Report
Language:English
Published: PERGAMON-ELSEVIER SCIENCE LTD 2019
Subjects:
Physical Geography
Geology
Beryllium-10
Cosmogenic nuclide
Solar activity
Endogenic travertine
Geography
Physical
Geosciences
Multidisciplinary
COSMOGENIC BE-10
LACUSTRINE SEDIMENTS
STABLE-ISOTOPES
LAKE BAIKAL
SW CHINA
ICE
ANTARCTICA
CLIMATE
DEPOSITS
MALT
Antarc*
Antarctica
Online Access:http://ir.gig.ac.cn/handle/344008/41148
https://doi.org/10.1016/j.quascirev.2019.05.012
Description
Summary:The accurate reconstruction of past solar activity is a prerequisite for assessing the role of solar forcing on climate variations. Cosmogenic Be-10, produced by galactic cosmic rays and stored in natural archives such as ice cores and lake sediments, has been shown to be the most reliable as an indicator of past solar activity, although reconstructions at a higher, annual, resolution have remained elusive due to dating imprecision and uncertainties concerning the effect of depositional processes. Here, we employ a methodology that facilitates the annual reconstruction of past cosmic-ray and solar activity variations. An annual Be-10 record is assembled from an endogenic travertine in Baishuitai, China, covering the period 2001-2016 CE. We demonstrate that the effect of depositional processes when Be-10 is incorporated into travertine can be accounted for using the associated 9 Be and potassium (K) contents, and that the resulting corrected Be-10 content significantly correlates with the modeled global Be-10 production rates with a time lag of 1.5-2.5 years. Our results from the Baishuitai endogenic travertine suggest that the Be-10 record in such carbonate sediments has considerable potential as a high resolution proxy for past cosmic-ray and solar activity variations. (C) 2019 Elsevier Ltd. All rights reserved.

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