Holocene atmospheric dust deposition in NW Spain
Atmospheric dust plays an important role in terrestrial and marine ecosystems, particularly those that are nutrient limited. Despite that most dust originates from arid and semi-arid regions, recent research has shown that past dust events may have been involved in boosting productivity in nutrient-...
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crsagepubl:10.1177/0959683619875193 2024-05-19T07:45:18+00:00 Holocene atmospheric dust deposition in NW Spain Martínez Cortizas, Antonio López-Costas, Olalla Orme, Lisa Mighall, Tim Kylander, Malin E Bindler, Richard Gallego Sala, Ángela xunta de galicia xunta de galicia 2019 http://dx.doi.org/10.1177/0959683619875193 http://journals.sagepub.com/doi/pdf/10.1177/0959683619875193 http://journals.sagepub.com/doi/full-xml/10.1177/0959683619875193 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 30, issue 4, page 507-518 ISSN 0959-6836 1477-0911 journal-article 2019 crsagepubl https://doi.org/10.1177/0959683619875193 2024-04-25T08:13:05Z Atmospheric dust plays an important role in terrestrial and marine ecosystems, particularly those that are nutrient limited. Despite that most dust originates from arid and semi-arid regions, recent research has shown that past dust events may have been involved in boosting productivity in nutrient-poor peatlands. We investigated dust deposition in a mid-latitude, raised bog, which is surrounded by a complex geology (paragneiss/schist, granite, quartzite and granodiorite). As proxies for dust fluxes, we used accumulation rates of trace (Ti, Zr, Rb, Sr and Y) as well as major (K and Ca) lithogenic elements. The oldest, largest dust deposition event occurred between ~8.6 and ~7.4 ka BP, peaking at ~8.1 ka BP (most probably the 8.2 ka BP event). The event had a large impact on the evolution of the mire, which subsequently transitioned from a fen into a raised bog in ~1500 years. From ~6.7 to ~4.0 ka BP, fluxes were very low, coeval with mid-Holocene forest stability and maximum extent. In the late Holocene, after ~4.0 ka BP, dust events became more prevalent with relatively major deposition at ~3.2–2.5, ~1.4 ka BP and ~0.35–0.05 ka BP, and minor peaks at ~4.0–3.7, ~1.7, ~1.10–0.95 ka BP and ~0.74–0.58 ka BP. Strontium fluxes display a similar pattern between ~11 and ~6.7 ka BP but then became decoupled from the other elements from the mid Holocene onwards. This seems to be a specific signal of the granodiorite batholith, which has an Sr anomaly. The reconstructed variations in dust fluxes bear a strong climatic imprint, probably related to storminess controlled by North Atlantic Oscillation conditions. Complex interactions also arise because of increased pressure from human activities. Article in Journal/Newspaper North Atlantic North Atlantic oscillation SAGE Publications The Holocene 30 4 507 518 |
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English |
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Atmospheric dust plays an important role in terrestrial and marine ecosystems, particularly those that are nutrient limited. Despite that most dust originates from arid and semi-arid regions, recent research has shown that past dust events may have been involved in boosting productivity in nutrient-poor peatlands. We investigated dust deposition in a mid-latitude, raised bog, which is surrounded by a complex geology (paragneiss/schist, granite, quartzite and granodiorite). As proxies for dust fluxes, we used accumulation rates of trace (Ti, Zr, Rb, Sr and Y) as well as major (K and Ca) lithogenic elements. The oldest, largest dust deposition event occurred between ~8.6 and ~7.4 ka BP, peaking at ~8.1 ka BP (most probably the 8.2 ka BP event). The event had a large impact on the evolution of the mire, which subsequently transitioned from a fen into a raised bog in ~1500 years. From ~6.7 to ~4.0 ka BP, fluxes were very low, coeval with mid-Holocene forest stability and maximum extent. In the late Holocene, after ~4.0 ka BP, dust events became more prevalent with relatively major deposition at ~3.2–2.5, ~1.4 ka BP and ~0.35–0.05 ka BP, and minor peaks at ~4.0–3.7, ~1.7, ~1.10–0.95 ka BP and ~0.74–0.58 ka BP. Strontium fluxes display a similar pattern between ~11 and ~6.7 ka BP but then became decoupled from the other elements from the mid Holocene onwards. This seems to be a specific signal of the granodiorite batholith, which has an Sr anomaly. The reconstructed variations in dust fluxes bear a strong climatic imprint, probably related to storminess controlled by North Atlantic Oscillation conditions. Complex interactions also arise because of increased pressure from human activities. |
author2 |
xunta de galicia xunta de galicia |
format |
Article in Journal/Newspaper |
author |
Martínez Cortizas, Antonio López-Costas, Olalla Orme, Lisa Mighall, Tim Kylander, Malin E Bindler, Richard Gallego Sala, Ángela |
spellingShingle |
Martínez Cortizas, Antonio López-Costas, Olalla Orme, Lisa Mighall, Tim Kylander, Malin E Bindler, Richard Gallego Sala, Ángela Holocene atmospheric dust deposition in NW Spain |
author_facet |
Martínez Cortizas, Antonio López-Costas, Olalla Orme, Lisa Mighall, Tim Kylander, Malin E Bindler, Richard Gallego Sala, Ángela |
author_sort |
Martínez Cortizas, Antonio |
title |
Holocene atmospheric dust deposition in NW Spain |
title_short |
Holocene atmospheric dust deposition in NW Spain |
title_full |
Holocene atmospheric dust deposition in NW Spain |
title_fullStr |
Holocene atmospheric dust deposition in NW Spain |
title_full_unstemmed |
Holocene atmospheric dust deposition in NW Spain |
title_sort |
holocene atmospheric dust deposition in nw spain |
publisher |
SAGE Publications |
publishDate |
2019 |
url |
http://dx.doi.org/10.1177/0959683619875193 http://journals.sagepub.com/doi/pdf/10.1177/0959683619875193 http://journals.sagepub.com/doi/full-xml/10.1177/0959683619875193 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
The Holocene volume 30, issue 4, page 507-518 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683619875193 |
container_title |
The Holocene |
container_volume |
30 |
container_issue |
4 |
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507 |
op_container_end_page |
518 |
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1799485317542051840 |