8000 years of North Atlantic storminess reconstructed from a Scottish peat record: implications for Holocene atmospheric circulation patterns in Western Europe

Stewart, Helena; Bradwell, Tom; Bullard, Joanna E.; Davies, Sarah J.; Golledge, Nicholas R.; McCulloch, Robert

doi:10.1002/jqs.2983

Cited by 20 publications

(30 citation statements)

References 80 publications

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“…If this scenario was typical of the whole Holocene, our record also suggests that NAO values may have been positive during the mid Holocene, when mineral matter fluxes to TPD were very low. A situation supported by increased storm activity at higher latitude during this period (Stewart et al, 2018).…”

Section: Discussionmentioning

confidence: 85%

Holocene atmospheric dust deposition in NW Spain

et al. 2019

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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.

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Section: Discussionmentioning

confidence: 85%

Holocene atmospheric dust deposition in NW Spain

et al. 2019

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“…Holocene storms or phases of high storm activity and can be used in the long term timescale analyses (e.g. Jong et al, 2006;Liu and Fearn, 1993;Orme et al, 2015;Stewart et al, 2017).…”

Section: Selection Of the Study Sitesmentioning

confidence: 99%

“…These phases can be linked to climate change influenced mechanisms, such as atmospheric circulation patterns (e.g. Goslin et al, 2018;Poirier et al, 2017;Stewart et al, 2017), temperature evolution (e.g. Sabatier et al, 2012;Sorrel et al, 2009;Van Vliet Lanoe et al, 2017) or ecstatic sea level variation (e.g.…”

Section: P R E -P R I N Tmentioning

confidence: 99%

Temporal approaches of historical extreme storm events based on sedimentological archives

Pouzet

Maanan

2020

Journal of African Earth Sciences

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This paper presents the benefits of multiplying environmental indicators to better understand the impacts of past storm events on the environment. It aims to describe the methodological approaches used to reconstruct past extreme events from washover deposits, at the three main temporal scales used in scientific bibliography: i) the long timescale (Holocene, since 12 000 years BP), ii) the meso timescale (for the last millenary) and iii) the short timescale (Anthropocene, for the last centuries). This methodology is based on a "multiproxy" analysis using sedimentology, geochemistry and various methods of isotope dating. Linking these methods with other disciplines such as history, archaeology and meteorology leads us to confirm with great certainty the existence of these extreme events, and to expose their impacts on the environment and on past coastal societies. These different approaches enable us to enhance and refine our knowledge of coastal hazards, but also to apprehend possible storm influences in the context of climate change.

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“…This provides a basis for reviewing the Samoan datasets to assess whether comparable trends are observed for the 2009 event. Distinct elevations in bromine (Br), chlorine (Cl), sulfur (S), calcium (Ca), iron (Fe), silicon (Si), titanium (Ti), rubidium (Rb) and potassium (K), are particularly targeted as these elements are known to represent marine influences [17,18]. The findings are discussed with conclusions provided in the context of tsunami deposits and longer-term hazards in this region.…”

Section: Introductionmentioning

confidence: 99%

Tsunami Elemental Signatures in the Samoan Islands: A Case Study

Williams¹

2020

Applied Geochemistry With Case Studies on Geological Formations, Exploration Techniques and Environmental Issues

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This study uses Itrax X-ray fluorescence element data available for Samoan sediment cores, obtained from three separate locations after the 2009 tsunami in this region, to identify its elemental characteristics in the coastal landscape. Normalization of data using Al reveals a distinct elevated elemental signature for this event at sites which had experienced inundation. This provides benchmarks for identifying comparable signatures in the core profiles which likely represent past tsunamis to have inundated each site. Such information can support a better understanding of the frequency and longer-term threats posed by tsunamis in this region. The findings presented are consistent with benchmark tsunami Itrax observations at Little Pigeon Bay following the 2016 Kaikōura Tsunami in New Zealand. Furthermore, they reinforce the normalization of Itrax element data using Al to interpret tsunami episodes in sediment cores, in addition to using high resolution core scanning as an effective non-destructive tool to screen likely tsunami deposits for more targeted multi-proxy analysis.

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8000 years of North Atlantic storminess reconstructed from a Scottish peat record: implications for Holocene atmospheric circulation patterns in Western Europe

Cited by 20 publications

References 80 publications

Holocene atmospheric dust deposition in NW Spain

Holocene atmospheric dust deposition in NW Spain

Temporal approaches of historical extreme storm events based on sedimentological archives

Tsunami Elemental Signatures in the Samoan Islands: A Case Study

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