Holocene atmospheric dust deposition in NW Spain

Antonio Martínez Cortizas (Corresponding Author), Olalla López-Costas, Lisa Orme, Tim Mighall, Malin E. Kylander, Richard Bindler, Angela Gallego-Sala

Research output: Contribution to journalArticle

Abstract

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.
Original languageEnglish
Number of pages12
JournalThe Holocene
Early online date18 Sep 2019
DOIs
Publication statusE-pub ahead of print - 18 Sep 2019

Fingerprint

Holocene
dust
raised bog
granodiorite
Spain
Deposition
nutrient
mire
fen
quartzite
North Atlantic Oscillation
batholith
strontium
semiarid region
terrestrial ecosystem
peatland
marine ecosystem
accumulation rate
schist
human activity

Keywords

  • peat records
  • dust
  • Holocene
  • storminess
  • NAO
  • human activities
  • PEAT BOG
  • GREAT BOG
  • STORE MOSSE
  • IBERIAN PENINSULA
  • NORTH-ATLANTIC OSCILLATION
  • TRACE-ELEMENTS
  • PB
  • TIERRA-DEL-FUEGO
  • SOIL-EROSION
  • CLIMATE

Cite this

Martínez Cortizas, A., López-Costas, O., Orme, L., Mighall, T., Kylander, M. E., Bindler, R., & Gallego-Sala, A. (2019). Holocene atmospheric dust deposition in NW Spain. The Holocene. https://doi.org/10.1177/0959683619875193

Holocene atmospheric dust deposition in NW Spain. / Martínez Cortizas, Antonio (Corresponding Author); López-Costas, Olalla; Orme, Lisa; Mighall, Tim; Kylander, Malin E.; Bindler, Richard; Gallego-Sala, Angela.

In: The Holocene, 18.09.2019.

Research output: Contribution to journalArticle

Martínez Cortizas, A, López-Costas, O, Orme, L, Mighall, T, Kylander, ME, Bindler, R & Gallego-Sala, A 2019, 'Holocene atmospheric dust deposition in NW Spain', The Holocene. https://doi.org/10.1177/0959683619875193
Martínez Cortizas A, López-Costas O, Orme L, Mighall T, Kylander ME, Bindler R et al. Holocene atmospheric dust deposition in NW Spain. The Holocene. 2019 Sep 18. https://doi.org/10.1177/0959683619875193
Martínez Cortizas, Antonio ; López-Costas, Olalla ; Orme, Lisa ; Mighall, Tim ; Kylander, Malin E. ; Bindler, Richard ; Gallego-Sala, Angela. / Holocene atmospheric dust deposition in NW Spain. In: The Holocene. 2019.
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abstract = "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.",
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AU - Kylander, Malin E.

AU - Bindler, Richard

AU - Gallego-Sala, Angela

N1 - Acknowledgements The authors would like to extend their thanks to the students of the EcoPast research group (GI-1553, Universidade de Santiago de Compostela, Facultade de Bioloxía) and colleagues who helped with fieldwork and laboratory analyses. Funding The author(s) disclosed receipt of the following financial support for the research, authorship and/or publication of this article: This research was partially funded by Consiliencia network (ED431D2017/08 Xunta de Galicia) and Funding for Consolidation and Structuration of Research Units (ED431B2018/20 Xunta de Galicia).

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N2 - 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.

AB - 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.

KW - peat records

KW - dust

KW - Holocene

KW - storminess

KW - NAO

KW - human activities

KW - PEAT BOG

KW - GREAT BOG

KW - STORE MOSSE

KW - IBERIAN PENINSULA

KW - NORTH-ATLANTIC OSCILLATION

KW - TRACE-ELEMENTS

KW - PB

KW - TIERRA-DEL-FUEGO

KW - SOIL-EROSION

KW - CLIMATE

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DO - 10.1177/0959683619875193

M3 - Article

JO - The Holocene

JF - The Holocene

SN - 0959-6836

ER -