Jonny McAneney

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In 2012 Plummer et al., in presenting the volcanic chronology of the Antarctic Law Dome ice core, chose to list connections to acid layers in other ice cores and also possible chronological coincidences between ice acid dates and the precise dates of frost damage, and/or reduced growth in North American bristlecone pines. We disagree with the chron...

This article was written as a guest commentary for the blog RealClimate.org and can be found here http://www.realclimate.org/index.php/archives/2015/02/the-mystery-of-the-offset-chronologies-tree-rings-and-the-volcanic-record-of-the-1st-millennium/#more-18139

Much evidence exists for the major climate anomaly c2200-2000 BC. In this paper, we demonstrate that precisely dated Irish bog oaks record this climatic event, which appears to begin abruptly in 2206 BC and last until around 1900 BC. However, it might be unwise to ignore the precisely dated, abrupt environmental downturn that occurs some 150 years...

By linking ice-core volcanic horizons with precisely dated frost damage in bristlecone pines, the authors have revised the dating of the principal Greenland ice-core chronologies back to c. 2000 BC. This revision has implications for establishing an absolute calendar date for the Bronze Age eruption of Thera. Three volcanic horizons (1653, 1627 and...

Supplementary Materials referenced in McAneney and Baillie "Absolute tree-ring dates for the Late Bronze Age eruptions of Aniakchak and Thera in light of a proposed revision of ice-core chronologies" Antiquity 93, 367 (2019); 99-112 accessible at https://doi.org/10.15184/aqy.2018.165

Background In response to the COVID-19 pandemic, most countries have introduced non-pharmaceutical interventions, such as stay-at-home orders, to reduce person-to-person contact and break trains of transmission. The aim of this systematic review was to assess the effect of different public health restrictions on mobility across different countries...

This paper and supplementary material can be accessed via Cambridge Core on the following link https://www.cambridge.org/core/journals/antiquity/article/absolute-treering-dates-for-the-late-bronze-age-eruptions-of-aniakchak-and-thera-in-light-of-a-proposed-revision-of-icecore-chronologies/0E06053BFD90C1EA58ED8822814DC6F8/share/a8735201d4b03db20bfa...

This article was written as a guest commentary for the blog RealClimate.org and can be found here http://www.realclimate.org/index.php/archives/2015/08/ice-core-dating-corroborates-tree-ring-chronologies/

This photograph of a lunar rainbow was taken by photographer Alessandra Piasecka at the Castelvecchio Bridge in Verona, Italy, and was chosen as our Facebook "Image of the Day" for 19 September.

Various attempts have been made to link tree-ring and ice-core records, something vital for the understanding of the environmental response to major volcanic eruptions in the past. Here we demonstrate that, by taking note of the spacing between events, it is possible to clarify linkages between tree-response, as witnessed by frost rings in bristlec...

A series of experiments has been undertaken to understand more about the fundamental origin of the thickness-induced permittivity collapse often observed in conventional thin film ferroelectric heterostructures. The various experiments are discussed, highlighting the eventual need to examine permittivity collapse in thin film single crystal materia...

Ba _0.5 Sr _0.5 Ti O ₃ (BST) thin-film capacitor structures with various thicknesses, (50–1200 nm ) and different strain conditions (on lanthanum strontium cobalt oxide La _0.5 Sr _0.5 Co O ₃ and strontium ruthenate Sr Ru O ₃ buffer layers) were made using pulsed laser deposit...

Thin and ultrathin ferroelectric capacitors were fabricated using Pulsed Laser Deposition, and characterised both functionally and structurally to investigate the thickness dependence of the permittivity, and the effects of mechanical boundary conditions on the ferroelectric layer’s structural phase. The series capacitor model was implemented to...

Barium strontium titanate (Ba0.5Sr0.5TiO3–BST) thin film capacitor structures were made using pulsed laser deposition, and their functional properties were monitored with varying temperature. It was found that poling at low temperature could induce distinct differences in the behavior of the dielectric constant and loss tangent, on heating. In rela...

X-ray analysis of ferroelectric thin layers of Ba1/2Sr1/2TiO3 with different thickness reveals the presence of internal strain gradients across the film thickness and allows us to propose a functional form for the internal strain profile. We use this to calculate the direct influence of strain gradient, through flexoelectric coupling, on the degrad...

Thin film Ba0.5Sr0.5TiO3 (BST) capacitors of thickness ∼ 75 nm to ∼ 1200 nm, with Au top electrodes and SrRuO3 (SRO) or (La, Sr)CoO3 (LSCO) bottom electrodes were fabricated using Pulsed Laser Deposition. Implementing the “series capacitor model,” bulk and interfacial capacitance properties were extracted as a function of temperature and frequency....

There is currently a great deal of interest on the degree to which homogeneous misfit strain, induced at the interface between the film and substrate, changes the sequence of phase transitions that occurs in ferroelectric thin films with temperature. Recent modelling by Pertsev et al [Phys. Rev. Lett. 80, 1988 (1998)], Ban et al [J. Appl. Phys. 91,...

Thin film Au/Ba0.5Sr0.5TiO3/SrRuO3 capacitor structures, with a thickness of dielectric varying between ∼70 and ∼950 nm, were deposited on {001} MgO single-crystal substrates using pulsed laser deposition. Low-field dielectric measurements were performed as a function of temperature and frequency. At all temperatures and frequencies, the dielectric...

Thin film Au / Ba0.5Sr0.5TiO3 / SrRuO3 capacitor structures were deposited on {001} MgO single crystal substrates using pulsed laser deposition. The thickness of the dielectric layer was varied from ~70 to ~950nm. Low-field dielectric measurements were performed as a function of temperature between 130 and 400K, and as a function of frequency betwe...

Thin film parallel-plate capacitor structures with Ba0.5Sr0.5TiO3 as the dielectric layer were fabricated using pulsed-laser deposition. The thickness of the dielectric was varied between 7.5 nm and 1.4 μm. Low-field measurements of the dielectric constant showed the system to possess a nonzero interfacial capacitance. Since there is considerable d...