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Solar cycles and depositional processes in annual Be-10 from two varved lake sediment records

Czymzik, Markus LU ; Muscheler, Raimund LU ; Brauer, Achim; Adolphi, Florian LU ; Ott, Florian; Kienel, Ulrike; Draeger, Nadine; Slowinski, Michal; Aldahane, Ala and Possnert, Goran (2015) In Earth and Planetary Science Letters 428. p.44-51
Abstract
Beryllium 10 concentrations (Be-10(con)) were measured at annual resolution from varved sediment cores of Lakes Tiefer See (TSK) and Czechowskie (JC) for the period 1983-2009 (similar to solar cycles 22 and 23). Calibrating the Be-10(con) time-series against complementing proxy records from the same archive as well as local precipitation and neutron monitor data, reflecting solar forced changes in atmospheric radionuclide production, allowed (i) identifying the main depositional processes and (ii) evaluating the potential for solar activity reconstruction. Be-10(con) in TSK and JC sediments are significantly correlated to varying neutron monitor counts (TSK: r = 0.5, p = 0.05, n = 16; JC: r = 0.46, p = 0.03, n = 22). However, the further... (More)
Beryllium 10 concentrations (Be-10(con)) were measured at annual resolution from varved sediment cores of Lakes Tiefer See (TSK) and Czechowskie (JC) for the period 1983-2009 (similar to solar cycles 22 and 23). Calibrating the Be-10(con) time-series against complementing proxy records from the same archive as well as local precipitation and neutron monitor data, reflecting solar forced changes in atmospheric radionuclide production, allowed (i) identifying the main depositional processes and (ii) evaluating the potential for solar activity reconstruction. Be-10(con) in TSK and JC sediments are significantly correlated to varying neutron monitor counts (TSK: r = 0.5, p = 0.05, n = 16; JC: r = 0.46, p = 0.03, n = 22). However, the further correlations with changes in organic carbon contents in TSK as well as varying organic carbon and detrital matter contents in JC point to catchment specific biases in the 10Be(con) time-series. In an attempt to correct for these biases multiple regression analysis was applied to extract an atmospheric Be-10 production signal (Be-10(atmosphere)). To increase the signal to noise ratio a Be-10 composite record (Be-10(composite)) was calculated from the TSK time-series. Be-10(composite) and JC Be-10(atmosphere) is significantly correlated to variations in the neutron monitor record (r = 0.49, p = 0.01, n = 25) and matches the expected amplitude changes in 10Be production between solar cycle minima and maxima. This calibration study on 10Be from two sites indicates the large potential but also, partly site-specific, limitations of Be-10 in varved lake sediments for solar activity reconstruction. (C) 2015 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Be-10, cosmogenic radionuclides, solar activity, varved lake sediments
in
Earth and Planetary Science Letters
volume
428
pages
44 - 51
publisher
Elsevier
external identifiers
  • wos:000360952600005
  • scopus:84938153570
ISSN
1385-013X
DOI
10.1016/j.epsl.2015.07.037
language
English
LU publication?
yes
id
97ccba5c-e6fe-44e5-82e0-d6252f993fa3 (old id 8074288)
date added to LUP
2015-10-22 14:42:08
date last changed
2017-03-26 03:22:40
@article{97ccba5c-e6fe-44e5-82e0-d6252f993fa3,
  abstract     = {Beryllium 10 concentrations (Be-10(con)) were measured at annual resolution from varved sediment cores of Lakes Tiefer See (TSK) and Czechowskie (JC) for the period 1983-2009 (similar to solar cycles 22 and 23). Calibrating the Be-10(con) time-series against complementing proxy records from the same archive as well as local precipitation and neutron monitor data, reflecting solar forced changes in atmospheric radionuclide production, allowed (i) identifying the main depositional processes and (ii) evaluating the potential for solar activity reconstruction. Be-10(con) in TSK and JC sediments are significantly correlated to varying neutron monitor counts (TSK: r = 0.5, p = 0.05, n = 16; JC: r = 0.46, p = 0.03, n = 22). However, the further correlations with changes in organic carbon contents in TSK as well as varying organic carbon and detrital matter contents in JC point to catchment specific biases in the 10Be(con) time-series. In an attempt to correct for these biases multiple regression analysis was applied to extract an atmospheric Be-10 production signal (Be-10(atmosphere)). To increase the signal to noise ratio a Be-10 composite record (Be-10(composite)) was calculated from the TSK time-series. Be-10(composite) and JC Be-10(atmosphere) is significantly correlated to variations in the neutron monitor record (r = 0.49, p = 0.01, n = 25) and matches the expected amplitude changes in 10Be production between solar cycle minima and maxima. This calibration study on 10Be from two sites indicates the large potential but also, partly site-specific, limitations of Be-10 in varved lake sediments for solar activity reconstruction. (C) 2015 Elsevier B.V. All rights reserved.},
  author       = {Czymzik, Markus and Muscheler, Raimund and Brauer, Achim and Adolphi, Florian and Ott, Florian and Kienel, Ulrike and Draeger, Nadine and Slowinski, Michal and Aldahane, Ala and Possnert, Goran},
  issn         = {1385-013X},
  keyword      = {Be-10,cosmogenic radionuclides,solar activity,varved lake sediments},
  language     = {eng},
  pages        = {44--51},
  publisher    = {Elsevier},
  series       = {Earth and Planetary Science Letters},
  title        = {Solar cycles and depositional processes in annual Be-10 from two varved lake sediment records},
  url          = {http://dx.doi.org/10.1016/j.epsl.2015.07.037},
  volume       = {428},
  year         = {2015},
}