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 nutrientp...
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ftunivmaynooth:oai:mural.maynoothuniversity.ie:13604 2023-05-15T17:35:26+02:00 Holocene atmospheric dust deposition in NW Spain Martínez Cortizas, Antonio López-Costas, Olalla Orme, Lisa C. Mighall, Timothy Kylander, Malin E. Bindler, Richard Gallego-Sala, Angela V. 2019 text https://mural.maynoothuniversity.ie/13604/ https://mural.maynoothuniversity.ie/13604/1/LO_holocene.pdf en eng SAGE Publications https://mural.maynoothuniversity.ie/13604/1/LO_holocene.pdf Martínez Cortizas, Antonio and López-Costas, Olalla and Orme, Lisa C. and Mighall, Timothy and Kylander, Malin E. and Bindler, Richard and Gallego-Sala, Angela V. (2019) Holocene atmospheric dust deposition in NW Spain. Holocene, 30 (4). pp. 507-518. ISSN 0959-6836 Article PeerReviewed 2019 ftunivmaynooth 2022-06-13T18:47:59Z 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 nutrientpoor 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 Maynooth University ePrints and eTheses Archive (National University of Ireland) |
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Open Polar |
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Maynooth University ePrints and eTheses Archive (National University of Ireland) |
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ftunivmaynooth |
language |
English |
description |
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 nutrientpoor 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. |
format |
Article in Journal/Newspaper |
author |
Martínez Cortizas, Antonio López-Costas, Olalla Orme, Lisa C. Mighall, Timothy Kylander, Malin E. Bindler, Richard Gallego-Sala, Angela V. |
spellingShingle |
Martínez Cortizas, Antonio López-Costas, Olalla Orme, Lisa C. Mighall, Timothy Kylander, Malin E. Bindler, Richard Gallego-Sala, Angela V. Holocene atmospheric dust deposition in NW Spain |
author_facet |
Martínez Cortizas, Antonio López-Costas, Olalla Orme, Lisa C. Mighall, Timothy Kylander, Malin E. Bindler, Richard Gallego-Sala, Angela V. |
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 |
https://mural.maynoothuniversity.ie/13604/ https://mural.maynoothuniversity.ie/13604/1/LO_holocene.pdf |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://mural.maynoothuniversity.ie/13604/1/LO_holocene.pdf Martínez Cortizas, Antonio and López-Costas, Olalla and Orme, Lisa C. and Mighall, Timothy and Kylander, Malin E. and Bindler, Richard and Gallego-Sala, Angela V. (2019) Holocene atmospheric dust deposition in NW Spain. Holocene, 30 (4). pp. 507-518. ISSN 0959-6836 |
_version_ |
1766134595269427200 |