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Wind regime changes in the Euro-Atlantic region driven by Late-Holocene Grand Solar Minima

Harding, P. ; Martin-Puertas, C. ; Sjolte, J. LU orcid ; Walsh, A. A. ; Tjallingii, R. ; Langdon, C. ; Blockley, S. P.E. ; Brauer, A. ; Langdon, P. and Milner, A. M. , et al. (2022) In Climate Dynamics
Abstract

Understanding atmospheric response to radiative forcing, including the intensity and distribution of wind patterns is critical as this might have important implications in the coming decades. Long-term episodes of reduced solar activity (i.e. Grand Solar Minima, GSM) have triggered rapid climate change in the past, recorded in proxy-based records, including varved sediments from Meerfelder Maar, Germany, where the Homeric GSM (~ 2800 years ago) was studied. This study reconstructs windy conditions during the same GSM from Diss Mere, another varved record in England, to support the solar-wind linkage in the North Atlantic-European region. We use diatoms as proxies for windiness and support the palaeolimnological and palaeoclimate... (More)

Understanding atmospheric response to radiative forcing, including the intensity and distribution of wind patterns is critical as this might have important implications in the coming decades. Long-term episodes of reduced solar activity (i.e. Grand Solar Minima, GSM) have triggered rapid climate change in the past, recorded in proxy-based records, including varved sediments from Meerfelder Maar, Germany, where the Homeric GSM (~ 2800 years ago) was studied. This study reconstructs windy conditions during the same GSM from Diss Mere, another varved record in England, to support the solar-wind linkage in the North Atlantic-European region. We use diatoms as proxies for windiness and support the palaeolimnological and palaeoclimate interpretation with a multi-proxy approach, including sedimentological, geochemical, and biological (chironomids and pollen) evidence. The diatom assemblage documents a shift from Pantocsekiella ocellata dominance to Stephanodiscus parvus and Lindavia comta, indicating a shift to more turbulent waters from ~ 2767 ± 28, linked to increased windiness. This shift is synchronous with changes in 14C production, linked to solar activity changes during the GSM. Both proxy records reflect a rapid and synchronous atmospheric response (i.e. stronger winds) at the onset and during the GSM in the North Atlantic and continental Europe. In order to test whether this solar-wind linkage is consistent during other GSMs and to understand the underlying climate dynamics, we analyse the wind response to solar forcing at the two study sites during the Little Ice Age, a period that includes several GSMs. For this, we have used a reconstruction based on a 1200-year-long simulation with an isotope-enabled climate model. Our study suggests that wind anomalies in the North Atlantic-European sector may relate to an anomalous atmospheric circulation in response to long-term solar forcing leading to north-easterlies modulated by the East Atlantic pattern.

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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Atmospheric circulation, Climate change, Diatoms, Solar activity, Varves
in
Climate Dynamics
publisher
Springer
external identifiers
  • scopus:85135265721
ISSN
0930-7575
DOI
10.1007/s00382-022-06388-w
language
English
LU publication?
yes
id
e2a2932f-5529-4a2d-a4a5-8aa59c45195f
date added to LUP
2022-11-29 11:17:42
date last changed
2023-05-10 11:26:05
@article{e2a2932f-5529-4a2d-a4a5-8aa59c45195f,
  abstract     = {{<p>Understanding atmospheric response to radiative forcing, including the intensity and distribution of wind patterns is critical as this might have important implications in the coming decades. Long-term episodes of reduced solar activity (i.e. Grand Solar Minima, GSM) have triggered rapid climate change in the past, recorded in proxy-based records, including varved sediments from Meerfelder Maar, Germany, where the Homeric GSM (~ 2800 years ago) was studied. This study reconstructs windy conditions during the same GSM from Diss Mere, another varved record in England, to support the solar-wind linkage in the North Atlantic-European region. We use diatoms as proxies for windiness and support the palaeolimnological and palaeoclimate interpretation with a multi-proxy approach, including sedimentological, geochemical, and biological (chironomids and pollen) evidence. The diatom assemblage documents a shift from Pantocsekiella ocellata dominance to Stephanodiscus parvus and Lindavia comta, indicating a shift to more turbulent waters from ~ 2767 ± 28, linked to increased windiness. This shift is synchronous with changes in <sup>14</sup>C production, linked to solar activity changes during the GSM. Both proxy records reflect a rapid and synchronous atmospheric response (i.e. stronger winds) at the onset and during the GSM in the North Atlantic and continental Europe. In order to test whether this solar-wind linkage is consistent during other GSMs and to understand the underlying climate dynamics, we analyse the wind response to solar forcing at the two study sites during the Little Ice Age, a period that includes several GSMs. For this, we have used a reconstruction based on a 1200-year-long simulation with an isotope-enabled climate model. Our study suggests that wind anomalies in the North Atlantic-European sector may relate to an anomalous atmospheric circulation in response to long-term solar forcing leading to north-easterlies modulated by the East Atlantic pattern.</p>}},
  author       = {{Harding, P. and Martin-Puertas, C. and Sjolte, J. and Walsh, A. A. and Tjallingii, R. and Langdon, C. and Blockley, S. P.E. and Brauer, A. and Langdon, P. and Milner, A. M. and Muscheler, R. and Perez, M.}},
  issn         = {{0930-7575}},
  keywords     = {{Atmospheric circulation; Climate change; Diatoms; Solar activity; Varves}},
  language     = {{eng}},
  month        = {{07}},
  publisher    = {{Springer}},
  series       = {{Climate Dynamics}},
  title        = {{Wind regime changes in the Euro-Atlantic region driven by Late-Holocene Grand Solar Minima}},
  url          = {{http://dx.doi.org/10.1007/s00382-022-06388-w}},
  doi          = {{10.1007/s00382-022-06388-w}},
  year         = {{2022}},
}