Dendrochemical analysis of a tree-ring growth anomaly associated with the Late Bronze Age eruption of Thera

Pearson, Charlotte; Dale, Darren; Brewer, Peter W.; Kuniholm, Peter Ian; Lipton, Jeffrey; Manning, Sturt W.

doi:10.1016/j.jas.2009.01.009

Cited by 42 publications

(29 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In an earlier attempt to trace the Thera eruption, Pearson et al (24) conducted elemental analysis on a wide growth-ring anomaly from one of the tree-ring site chronologies overlapping with the Gordion record (Porsuk in southern central Turkey) (Fig. 1).…”

Section: Significancementioning

confidence: 99%

Securing timelines in the ancient Mediterranean using multiproxy annual tree-ring data

Pearson

Salzer

Wacker

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

Calendar-dated tree-ring sequences offer an unparalleled resource for high-resolution paleoenvironmental reconstruction. Where such records exist for a few limited geographic regions over the last 8,000 to 12,000 years, they have proved invaluable for creating precise and accurate timelines for past human and environmental interactions. To expand such records across new geographic territory or extend data for certain regions further backward in time, new applications must be developed to secure “floating” (not yet absolutely dated) tree-ring sequences, which cannot be assigned single-calendar year dates by standard dendrochronological techniques. This study develops two approaches to this problem for a critical floating tree-ring chronology from the East Mediterranean Bronze–Iron Age. The chronology is more closely fixed in time using annually resolved patterns of 14C, modulated by cosmic radiation, between 1700 and 1480 BC. This placement is then tested using an anticorrelation between calendar-dated tree-ring growth responses to climatically effective volcanism in North American bristlecone pine and the Mediterranean trees. Examination of the newly dated Mediterranean tree-ring sequence between 1630 and 1500 BC using X-ray fluorescence revealed an unusual calcium anomaly around 1560 BC. While requiring further replication and analysis, this anomaly merits exploration as a potential marker for the eruption of Thera.

show abstract

Section: Significancementioning

confidence: 99%

Securing timelines in the ancient Mediterranean using multiproxy annual tree-ring data

Pearson

Salzer

Wacker

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

“…Less attention has been given to the elemental and isotopic composition of tree rings in years when they might be subject to the influence of remote volcanic eruptions. Dated tree rings have been examined for traces of elements associated with both local and very distant volcanic eruptions (for example, Pearson et al, 2009). Although some studies using isotopic signals in tree rings showed physiological responses of trees to volcanic eruptions at mid-latitudes (for example, Battipaglia et al, 2007), there are no other isotopic studies of this kind for high-latitude and high-altitude regions of Eurasia in the context of explosive volcanic events.…”

Section: Introductionmentioning

confidence: 99%

A cluster of stratospheric volcanic eruptions in the AD 530s recorded in Siberian tree rings

Churakova

Bryukhanova

Saurer

et al. 2014

Global and Planetary Change

View full text Add to dashboard Cite

“…X-ray fluorescence (XRF) is a widely used analytical technique employed in different fields, [13][14][15] such as environmental studies, [16] medicine, [17] polymers, [18] biology, [19] botany, [20] archeology, [21] pharmacology, [22] and planetary studies. [23] Attractive features of the XRF technique include the fact that it is nondestructive, has high elemental selectivity, simplicity of quantification, and low detection limits.…”

Section: Introductionmentioning

confidence: 99%

X‐ray Fluorescence Investigation of Ordered Intermetallic Phases as Electrocatalysts towards the Oxidation of Small Organic Molecules

Liu

Lowe

Finkelstein

et al. 2010

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

The composition of ordered intermetallic nanoparticles (PtBi and PtPb) has been quantitatively studied by in situ X-ray fluorescence (XRF) during active electrochemical control in solutions of supporting electrolyte and small organic molecules (SOMs). Because the Pt L(β1,2) lines and the Bi L(α1,2) lines are only separated by 200 eV, an energy-dispersive detector and a multiple-channel analyzer (MCA) were used to record the major fluorescent emission lines from these two elements. The molar ratios of platinum to the less-noble elements (Bi, Pb) in the nanoparticles dramatically changed as a function of the applied upper limit potentials (E(ulp)) in cyclic voltammetric (CV) characterization. Similar to previous investigations for bulk intermetallic surfaces, the less-noble elements leached out from the surfaces of the intermetallic nanoparticles. For PtBi nanoparticles, the ratios of fluorescence intensities of Pt/Bi in the samples were 0.42, 0.96, and 1.36 for E(ulp)=+0.40, +0.80, and 1.20 V, respectively, while cycling the potential from -0.20 V to the E(ulp) value for 10 cycles. The leaching-out process of the less-noble elements occurred at more negative E(ulp) values than expected. After cycling to relatively positive E(ulp) values, nonuniform PtM (M=Bi of Pb) nanoparticles formed with a Pt-rich shell and intermetallic PtM core. When the supporting solutions contained active fuel molecules in addition to the intermetallic nanoparticles (formic acid for PtBi, formic acid and methanol for PtPb), kinetic stabilization effects were observed for E(ulp)=+0.80 V, in a way similar to the response of the bulk materials. It was of great importance to quantitatively explore the change in composition and structure of the intermetallic nanoparticles under active electrochemical control. More importantly, this approach represents a simple, universal, and multifunctional method for the study of multi-element nanoparticles as electrocatalysts. This is, to our knowledge, the first report of nondestructive, quantitative characterization of bimetallic or multi-elemental nanoparticles electrocatalysts under active electrochemical control.

show abstract

Dendrochemical analysis of a tree-ring growth anomaly associated with the Late Bronze Age eruption of Thera

Cited by 42 publications

References 58 publications

Securing timelines in the ancient Mediterranean using multiproxy annual tree-ring data

Securing timelines in the ancient Mediterranean using multiproxy annual tree-ring data

A cluster of stratospheric volcanic eruptions in the AD 530s recorded in Siberian tree rings

X‐ray Fluorescence Investigation of Ordered Intermetallic Phases as Electrocatalysts towards the Oxidation of Small Organic Molecules

Contact Info

Product

Resources

About