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The dynamics of Beryllium 10 transport and deposition in lake sediments

Henriksson, Oskar LU (2016) In Dissertations in Geology at Lund University GEOL01 20161
Department of Geology
Abstract
Lake sediments have lately been explored as a 10Be archive, complementing previous research on ice cores and marine sediments. 10Be is an important proxy as it can be used to study past solar activity, a factor which
affects the climate. Where other methods studying solar activity only cover a brief period of history, 10Be has the potential to go further back in time. The concentrations of 10Be studied in lake sediments is however potentially influenced by other processes than solar activity. Despite this, the solar signal has successfully been identified with a resolution which in some studies is sufficient to show the 11-year (Schwabe) cycle. This paper aims to improve the understanding of processes affecting the 10Be in lake sediments... (More)
Lake sediments have lately been explored as a 10Be archive, complementing previous research on ice cores and marine sediments. 10Be is an important proxy as it can be used to study past solar activity, a factor which
affects the climate. Where other methods studying solar activity only cover a brief period of history, 10Be has the potential to go further back in time. The concentrations of 10Be studied in lake sediments is however potentially influenced by other processes than solar activity. Despite this, the solar signal has successfully been identified with a resolution which in some studies is sufficient to show the 11-year (Schwabe) cycle. This paper aims to improve the understanding of processes affecting the 10Be in lake sediments in order to identify weather measured 10Be concentrations reflect changes in atmospheric production or environmental processes related to transport and deposition. By reviewing previous research, it has been found that influences from the surrounding environment are present in the preserved 10Be concentrations in lake sediments and have to be accounted for in order to obtain a reliable solar signal. However, when these influencing factors are corrected for, a solar signal with annual resolution can be obtained. This leads to the conclusion that 10Be in lake sediments could be comparable to other archives such as ice cores, with the benefit of reaching further into the past. (Less)
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author
Henriksson, Oskar LU
supervisor
organization
course
GEOL01 20161
year
type
M2 - Bachelor Degree
subject
keywords
solar activity, Beryllium-10, lake sediment, 10Be, solar cycle
publication/series
Dissertations in Geology at Lund University
report number
488
language
English
id
8884146
date added to LUP
2016-06-22 10:03:37
date last changed
2016-06-22 10:03:37
@misc{8884146,
  abstract     = {Lake sediments have lately been explored as a 10Be archive, complementing previous research on ice cores and marine sediments. 10Be is an important proxy as it can be used to study past solar activity, a factor which
affects the climate. Where other methods studying solar activity only cover a brief period of history, 10Be has the potential to go further back in time. The concentrations of 10Be studied in lake sediments is however potentially influenced by other processes than solar activity. Despite this, the solar signal has successfully been identified with a resolution which in some studies is sufficient to show the 11-year (Schwabe) cycle. This paper aims to improve the understanding of processes affecting the 10Be in lake sediments in order to identify weather measured 10Be concentrations reflect changes in atmospheric production or environmental processes related to transport and deposition. By reviewing previous research, it has been found that influences from the surrounding environment are present in the preserved 10Be concentrations in lake sediments and have to be accounted for in order to obtain a reliable solar signal. However, when these influencing factors are corrected for, a solar signal with annual resolution can be obtained. This leads to the conclusion that 10Be in lake sediments could be comparable to other archives such as ice cores, with the benefit of reaching further into the past.},
  author       = {Henriksson, Oskar},
  keyword      = {solar activity,Beryllium-10,lake sediment,10Be,solar cycle},
  language     = {eng},
  note         = {Student Paper},
  series       = {Dissertations in Geology at Lund University},
  title        = {The dynamics of Beryllium 10 transport and deposition in lake sediments},
  year         = {2016},
}