Search Results - "Ascough, Philippa L."

Charcoal reflectance measurements: implications for structural characterization and assessment of diagenetic alteration by Ascough, Philippa L., Bird, Michael I., Scott, Andrew C., Collinson, Margaret E., Cohen-Ofri, Illit, Snape, Colin E., Le Manquais, Katherine

“…Charcoal is a valuable source of archaeological and palaeoenvironmental proxy data. However growing evidence suggests that production conditions can strongly…”
Get full text

The efficiency of charcoal decontamination for radiocarbon dating by three pre-treatments – ABOX, ABA and hypy by Bird, Michael I., Levchenko, Vladimir, Ascough, Philippa L., Meredith, Will, Wurster, Christopher M., Williams, Alan, Tilston, Emma L., Snape, Colin E., Apperley, David C.

“…Here we report results of a direct inter-comparison of the ability of three radiocarbon pre-treatment techniques to remove radiocarbon contamination introduced…”
Get full text

Chemical Characteristics of Macroscopic Pyrogenic Carbon Following Millennial-Scale Environmental Exposure by Ascough, Philippa L., Brock, Fiona, Collinson, Margaret E., Painter, Jon D., Lane, David W., Bird, Michael I.

“…Pyrogenic Carbon (PyC) is ubiquitous in global environments, and is now known to form a significant, and dynamic component of the global carbon cycle, with at…”
Get full text

Isotopes in pyrogenic carbon: A review by Bird, Michael I., Ascough, Philippa L.

“…Pyrogenic carbon (PC; also known as biochar, charcoal, black carbon and soot) derived from natural and anthropogenic burning plays a major, but poorly…”
Get full text

A rapid throughput technique to isolate pyrogenic carbon by hydrogen pyrolysis for stable isotope and radiocarbon analysis by Haig, Jordahna, Ascough, Philippa L., Wurster, Christopher M., Bird, Michael I.

“…Rationale Rapid, reliable isolation of pyrogenic carbon (PyC; also known as char, soot, black carbon, or biochar) for the determination of stable carbon…”
Get full text

Rapid Removal of Atmospheric CO2 by Urban Soils by Washbourne, Carla-Leanne, Lopez-Capel, Elisa, Renforth, Phil, Ascough, Philippa L, Manning, David A. C

“…The measured calcium carbonate content of soils to a depth of 100 mm at a large urban development site has increased over 18 months at a rate that corresponds…”
Get full text

Quantifying CO2 Removal at Enhanced Weathering Sites: a Multiproxy Approach by Knapp, William J., Stevenson, Emily I., Renforth, Phil, Ascough, Philippa L., Knight, Alasdair C. G., Bridgestock, Luke, Bickle, Michael J., Lin, Yongjie, Riley, Alex L., Mayes, William M., Tipper, Edward T.

“…Enhanced weathering is a carbon dioxide (CO2) mitigation strategy that promises large scale atmospheric CO2 removal. The main challenge associated with…”
Get full text

Quantifying CO 2 Removal at Enhanced Weathering Sites: a Multiproxy Approach by Knapp, William J, Stevenson, Emily I, Renforth, Phil, Ascough, Philippa L, Knight, Alasdair C G, Bridgestock, Luke, Bickle, Michael J, Lin, Yongjie, Riley, Alex L, Mayes, William M, Tipper, Edward T

“…Enhanced weathering is a carbon dioxide (CO ) mitigation strategy that promises large scale atmospheric CO removal. The main challenge associated with enhanced…”
Get full text

8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry by Estrella-Martínez, Juan, Ascough, Philippa L., Schöne, Bernd R., Scourse, James D., Butler, Paul G.

“…The abrupt 8.2 ka cold event has been widely described from Greenland and North Atlantic records. However, its expression in shelf seas is poorly documented,…”
Get full text

Alkali extraction of archaeological and geological charcoal: evidence for diagenetic degradation and formation of humic acids by Ascough, Philippa L., Bird, Michael I., Francis, S.M., Lebl, T.

“…Charcoal forms a crucial source of archaeological and palaeoenvironmental data, providing a record of cultural activities, past climatic conditions and a means…”
Get full text

Forest Fire History in Amazonia Inferred From Intensive Soil Charcoal Sampling and Radiocarbon Dating by Feldpausch, Ted R., Carvalho, Lidiany, Macario, Kita D., Ascough, Philippa L., Flores, César F., Coronado, Eurídice N. Honorio, Kalamandeen, Michelle, Phillips, Oliver L., Staff, Richard A.

“…Fire has a historical role in tropical forests related to past climate and ancient land use spanning the Holocene; however, it is unclear from charcoal records…”
Get full text

X-ray microtomographic imaging of charcoal by Bird, Michael I., Ascough, Philippa L., Young, Iain M., Wood, Cheryl V., Scott, Andrew C.

“…We assess the potential of X-ray microtomography as a tool for the non-destructive, three-dimensional examination of the internal structure of charcoal…”
Get full text

Sources of n-alkanes in an urbanized estuary: Insights from molecular distributions and compound-specific stable and radiocarbon isotopes by Ahad, Jason M.E., Ganeshram, Raja S., Bryant, Charlotte L., Cisneros-Dozal, Luz M., Ascough, Philippa L., Fallick, Anthony E., Slater, Greg F.

“…Diagnostic molecular ratios and compound-specific 13C and 14C analyses were used to identify n-alkane sources in surface sediments collected along a transect…”
Get full text

Investigation of growth responses in saprophytic fungi to charred biomass by Ascough, Philippa L., Sturrock, Craig J., Bird, Michael I.

“…We present the results of a study testing the response of two saprophytic white-rot fungi species, Pleurotus pulmonarius and Coriolus versicolor, to charred…”
Get full text

Deciphering diet and monitoring movement: Multiple stable isotope analysis of the viking age settlement at Hofstaðir, Lake Mývatn, Iceland by Sayle, Kerry L., Hamilton, W. Derek, Cook, Gordon T., Ascough, Philippa L., Gestsdóttir, Hildur, McGovern, Thomas H.

“…ABSTRACT Objectives A previous multi‐isotope study of archaeological faunal samples from Skútustaðir, an early Viking age settlement on the southern shores of…”
Get full text

Radiocarbon reservoir effects in human bone collagen from northern Iceland by Ascough, Philippa L., Church, Mike J., Cook, Gordon T., Dunbar, Elaine, Gestsdóttir, Hildur, McGovern, Thomas H., Dugmore, Andrew J., Friðriksson, Adolf, Edwards, Kevin J.

“…Human bone collagen from a series of Icelandic human pagan graves was radiocarbon (14C) dated to aid understanding of early settlement (landnám) chronologies…”
Get full text

Performance of the rebuilt SUERC single-stage accelerator mass spectrometer by Shanks, Richard P., Ascough, Philippa L., Dougans, Andrew, Gallacher, Paul, Gulliver, Pauline, Rood, Dylan H., Xu, Sheng, Freeman, Stewart P.H.T.

“…The SUERC bipolar single-stage accelerator mass spectrometer (SSAMS) has been dismantled and rebuilt to accommodate an additional rotatable pre-accelerator…”
Get full text

Dynamics of Charcoal Alteration in a Tropical Biome: A Biochar-Based Study by Ascough, Philippa L., Bird, Michael I., Meredith, William, Snape, Colin, Large, D., Tilston, Emma, Apperley, David, Bernabé, Ana, Shen, Licheng

“…Pyrogenic carbon (PyC) is a polyaromatic residue of the incomplete combustion of biomass or fossil fuels. There is a growing recognition that PyC forms an…”
Get full text

Application of 34S analysis for elucidating terrestrial, marine and freshwater ecosystems: Evidence of animal movement/husbandry practices in an early Viking community around Lake Mývatn, Iceland by Sayle, Kerry L., Cook, Gordon T., Ascough, Philippa L., Hastie, Helen R., Einarsson, Árni, McGovern, Thomas H., Hicks, Megan T., Edwald, Ágústa, Friðriksson, Adolf

“…Carbon and nitrogen stable isotope ratios (δ13C and δ15N) have been used widely in archaeology to investigate palaeodiet. Sulphur stable isotope ratios (δ34S)…”
Get full text

Stable Isotopic (δ13C and δ15N) Characterization of Key Faunal Resources from Norse Period Settlements in North Iceland by Ascough, Philippa L, Church, Mike J, Cook, Gordon T, Einarsson, Árni, McGovern, Thomas H, Dugmore, Andrew J, Edwards, Kevin J

“…During the Viking Age, Norse peoples established settlements across the North Atlantic, colonizing the pristine and near-pristine landscapes of the Faroe…”
Get full text