A J Dugmore
Biographic Data
| ID | 3641998 |
|---|---|
| NAME | A J Dugmore |
| GIVEN NAMES | A J |
| FAMILY NAME | Dugmore |
| SIGNATURE | DUGMORE A J |
| AFFILIATIONS | University of Edinburgh |
| VERIFIED | No |
| TOTAL WORKS | 12 |
| TOTAL CITATIONS | 187 |
| WORKS AS AUTHOR | 12 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1992 |
| LATEST PUBLICATION YEAR | 2011 |
| H-INDEX | 8 |
An Icelandic freshwater radiocarbon reservoir effect
A freshwater radiocarbon ( 14 C) reservoir effect (FRE) is a 14 C age offset between the atmospheric and freshwater carbon reservoirs. FREs can be on the order of 10 000 14 C yr in extreme examples and are a crucial consideration for 14 C dating of palaeoenvironmental and archaeological samples. Correction for a FRE may be possible, provided the FRE and the proportion of FRE-affected carbon within a sample can be accurately quantified. However, a…
Examining the Inherent Variability in ΔR
Currently, there is significant ongoing research into the temporal and spatial variability of marine radiocarbon reservoir effects (MREs) through quantification of ΔR values. In turn, MRE studies often use large changes in ΔR values as proxies for changes in ocean circulation. ΔR values are published in a variety of formats with variations in how the errors on these values are calculated, making it difficult to identify trends or to compare value…
Temporal and Spatial Variations in Freshwater 14 C Reservoir Effects
Lake Mývatn is an interior highland lake in northern Iceland that forms a unique ecosystem of international scientific importance and is surrounded by a landscape rich in archaeological and paleoenvironmental sites. A significant freshwater reservoir effect (FRE) has been identified in carbon from the lake at some Viking (about AD 870–1000) archaeological sites in the wider region (Mývatnssveit). Previous accelerator mass spectrometry (AMS) measu…
Spatial Variation in the Marine Radiocarbon Reservoir Effect Throughout the Scottish Post-Roman to Late Medieval Period
The marine radiocarbon reservoir effect (MRE) occurs as a spatially and temporally dependent variable owing to localized changes in oceanic water composition. This study investigates ΔR values (deviations from the global average MRE whose ΔR = 0) during the period 500–1350 BP for the east coast of Scotland, where a complex estuarine system exists that drains into the semi-enclosed North Sea basin. Due to the availability of suitable archaeologica…
Charcoal Production During the Norse and Early Medieval Periods in Eyjafjallahreppur, Southern Iceland
Timber procurement and the use of woodlands are key issues in understanding the open landscapes of the Norse and Medieval periods in the North Atlantic islands. This paper outlines evidence for the timing and mechanisms of woodland use and deforestation in an area of southern Iceland, which is tracked through the mapping and analysis of charcoal production pits. Precise dating of the use of these charcoal production pits within a Bayesian framewo…
Variability in North Atlantic marine radiocarbon reservoir effects at c. AD 1000
14 C age measurements made on samples from three archaeological sites located on North Atlantic coasts were used to investigate the marine reservoir effect (MRE) at c.AD 1000. This is an important period within human cultural and palaeoenvironmental research as it is a time when Norse expansion to the North Atlantic islands occurred, during what appears to be a period of ameliorating climatic conditions. This makes improved chronological precisio…
Interdisciplinary investigations of the end of the Norse Western Settlement in Greenland
The loss of the Norse Western Settlement in Greenland around the mid-fourteenth century has long been taken as a prime example of the impact of changing climate on human populations. This study employs an interdisciplinary approach combining historical documents, detailed archaeological investigations, and a high-resolution proxy climate record from the Greenland Ice Sheet Project 2 (GISP2) to investigate possible causes for the end of this settl…
The Influence of Pretreatment on Humic Acid Yield and 14 C Age of Carex Peat
The object of the study was to assess the effects of a range of pretreatment/extraction schemes on the yields of humic acid and humin obtained from peat and the subsequent radiocarbon ages. We analyzed peat from Flókadalur in northern Iceland, collecting material from a profile containing seven visible tephra horizons in the upper 3 m, whose form and extent indicated little disturbance to the section over the last 4000 yr. The results of a range …
Bioarchaeological and climatological evidence for the fate of Norse farmers in medieval Greenland
Greenland, far north land of the Atlantic, has often been beyond the limit of European farming settlement. One of its Norse settlements, colonized just before AD 1000, is - astonishingly - not even at the southern tip, but a way up the west coast, the 'Western Settlement'. Environmental studies show why its occupation came to an end within five centuries, leaving Greenland once more a place of Arctic-adapted hunters
The 14 C Content of Modern Vegetation Samples from the Flanks of the Katla Volcano, Southern Iceland
Samples of living terrestrial plants comprising a moss ( Calliergon sp.), Carex spp. and Alchemilla spp. were collected from the surface of the mire at Engimýri in Mýrdalur, southern Iceland, 10 km from the crater rim of the central complex of the Katla volcano. This area is 16 km from the fissures active in ad 1918 and was directly affected by the tephra fall. Although there is no hot-spring or fumerole activity in the area, sufficient volcanic …
Radiocarbon Dating Tephra Layers in Britain and Iceland
Layers of volcanic ash, or tephra form widespread chronostratigraphic marker horizons which are important because of their distinctive characteristics and rapid deposition over large areas. Absolute dating of prehistoric layers effectively depends upon 14 C analysis. We focus here on Icelandic tephra layers at both proximal and distal sites and consider three strategies to obtain age estimates: 1) the conventional dating of individual profiles; 2…
Thin tephra layers in peat revealed by X-radiography
Interdisciplinary investigations of the end of the Norse Western Settlement in Greenland
The loss of the Norse Western Settlement in Greenland around the mid-fourteenth century has long been taken as a prime example of the impact of changing climate on human populations. This study employs an interdisciplinary approach combining historical documents, detailed archaeological investigations, and a high-resolution proxy climate record from the Greenland Ice Sheet Project 2 (GISP2) to investigate possible causes for the end of this settl…
Temporal and Spatial Variations in Freshwater 14 C Reservoir Effects
Lake Mývatn is an interior highland lake in northern Iceland that forms a unique ecosystem of international scientific importance and is surrounded by a landscape rich in archaeological and paleoenvironmental sites. A significant freshwater reservoir effect (FRE) has been identified in carbon from the lake at some Viking (about AD 870–1000) archaeological sites in the wider region (Mývatnssveit). Previous accelerator mass spectrometry (AMS) measu…
Examining the Inherent Variability in ΔR
Currently, there is significant ongoing research into the temporal and spatial variability of marine radiocarbon reservoir effects (MREs) through quantification of ΔR values. In turn, MRE studies often use large changes in ΔR values as proxies for changes in ocean circulation. ΔR values are published in a variety of formats with variations in how the errors on these values are calculated, making it difficult to identify trends or to compare value…
An Icelandic freshwater radiocarbon reservoir effect
A freshwater radiocarbon ( 14 C) reservoir effect (FRE) is a 14 C age offset between the atmospheric and freshwater carbon reservoirs. FREs can be on the order of 10 000 14 C yr in extreme examples and are a crucial consideration for 14 C dating of palaeoenvironmental and archaeological samples. Correction for a FRE may be possible, provided the FRE and the proportion of FRE-affected carbon within a sample can be accurately quantified. However, a…
Thin tephra layers in peat revealed by X-radiography
Variability in North Atlantic marine radiocarbon reservoir effects at c. AD 1000
14 C age measurements made on samples from three archaeological sites located on North Atlantic coasts were used to investigate the marine reservoir effect (MRE) at c.AD 1000. This is an important period within human cultural and palaeoenvironmental research as it is a time when Norse expansion to the North Atlantic islands occurred, during what appears to be a period of ameliorating climatic conditions. This makes improved chronological precisio…
Spatial Variation in the Marine Radiocarbon Reservoir Effect Throughout the Scottish Post-Roman to Late Medieval Period
The marine radiocarbon reservoir effect (MRE) occurs as a spatially and temporally dependent variable owing to localized changes in oceanic water composition. This study investigates ΔR values (deviations from the global average MRE whose ΔR = 0) during the period 500–1350 BP for the east coast of Scotland, where a complex estuarine system exists that drains into the semi-enclosed North Sea basin. Due to the availability of suitable archaeologica…
Bioarchaeological and climatological evidence for the fate of Norse farmers in medieval Greenland
Greenland, far north land of the Atlantic, has often been beyond the limit of European farming settlement. One of its Norse settlements, colonized just before AD 1000, is - astonishingly - not even at the southern tip, but a way up the west coast, the 'Western Settlement'. Environmental studies show why its occupation came to an end within five centuries, leaving Greenland once more a place of Arctic-adapted hunters
The 14 C Content of Modern Vegetation Samples from the Flanks of the Katla Volcano, Southern Iceland
Samples of living terrestrial plants comprising a moss ( Calliergon sp.), Carex spp. and Alchemilla spp. were collected from the surface of the mire at Engimýri in Mýrdalur, southern Iceland, 10 km from the crater rim of the central complex of the Katla volcano. This area is 16 km from the fissures active in ad 1918 and was directly affected by the tephra fall. Although there is no hot-spring or fumerole activity in the area, sufficient volcanic …
Charcoal Production During the Norse and Early Medieval Periods in Eyjafjallahreppur, Southern Iceland
Timber procurement and the use of woodlands are key issues in understanding the open landscapes of the Norse and Medieval periods in the North Atlantic islands. This paper outlines evidence for the timing and mechanisms of woodland use and deforestation in an area of southern Iceland, which is tracked through the mapping and analysis of charcoal production pits. Precise dating of the use of these charcoal production pits within a Bayesian framewo…
Radiocarbon Dating Tephra Layers in Britain and Iceland
Layers of volcanic ash, or tephra form widespread chronostratigraphic marker horizons which are important because of their distinctive characteristics and rapid deposition over large areas. Absolute dating of prehistoric layers effectively depends upon 14 C analysis. We focus here on Icelandic tephra layers at both proximal and distal sites and consider three strategies to obtain age estimates: 1) the conventional dating of individual profiles; 2…
The Influence of Pretreatment on Humic Acid Yield and 14 C Age of Carex Peat
The object of the study was to assess the effects of a range of pretreatment/extraction schemes on the yields of humic acid and humin obtained from peat and the subsequent radiocarbon ages. We analyzed peat from Flókadalur in northern Iceland, collecting material from a profile containing seven visible tephra horizons in the upper 3 m, whose form and extent indicated little disturbance to the section over the last 4000 yr. The results of a range …
Thin tephra layers in peat revealed by X-radiography
The 14 C Content of Modern Vegetation Samples from the Flanks of the Katla Volcano, Southern Iceland
Samples of living terrestrial plants comprising a moss ( Calliergon sp.), Carex spp. and Alchemilla spp. were collected from the surface of the mire at Engimýri in Mýrdalur, southern Iceland, 10 km from the crater rim of the central complex of the Katla volcano. This area is 16 km from the fissures active in ad 1918 and was directly affected by the tephra fall. Although there is no hot-spring or fumerole activity in the area, sufficient volcanic …
Radiocarbon Dating Tephra Layers in Britain and Iceland
Layers of volcanic ash, or tephra form widespread chronostratigraphic marker horizons which are important because of their distinctive characteristics and rapid deposition over large areas. Absolute dating of prehistoric layers effectively depends upon 14 C analysis. We focus here on Icelandic tephra layers at both proximal and distal sites and consider three strategies to obtain age estimates: 1) the conventional dating of individual profiles; 2…
Bioarchaeological and climatological evidence for the fate of Norse farmers in medieval Greenland
Greenland, far north land of the Atlantic, has often been beyond the limit of European farming settlement. One of its Norse settlements, colonized just before AD 1000, is - astonishingly - not even at the southern tip, but a way up the west coast, the 'Western Settlement'. Environmental studies show why its occupation came to an end within five centuries, leaving Greenland once more a place of Arctic-adapted hunters
Interdisciplinary investigations of the end of the Norse Western Settlement in Greenland
The loss of the Norse Western Settlement in Greenland around the mid-fourteenth century has long been taken as a prime example of the impact of changing climate on human populations. This study employs an interdisciplinary approach combining historical documents, detailed archaeological investigations, and a high-resolution proxy climate record from the Greenland Ice Sheet Project 2 (GISP2) to investigate possible causes for the end of this settl…
The Influence of Pretreatment on Humic Acid Yield and 14 C Age of Carex Peat
The object of the study was to assess the effects of a range of pretreatment/extraction schemes on the yields of humic acid and humin obtained from peat and the subsequent radiocarbon ages. We analyzed peat from Flókadalur in northern Iceland, collecting material from a profile containing seven visible tephra horizons in the upper 3 m, whose form and extent indicated little disturbance to the section over the last 4000 yr. The results of a range …
Variability in North Atlantic marine radiocarbon reservoir effects at c. AD 1000
14 C age measurements made on samples from three archaeological sites located on North Atlantic coasts were used to investigate the marine reservoir effect (MRE) at c.AD 1000. This is an important period within human cultural and palaeoenvironmental research as it is a time when Norse expansion to the North Atlantic islands occurred, during what appears to be a period of ameliorating climatic conditions. This makes improved chronological precisio…
Charcoal Production During the Norse and Early Medieval Periods in Eyjafjallahreppur, Southern Iceland
Timber procurement and the use of woodlands are key issues in understanding the open landscapes of the Norse and Medieval periods in the North Atlantic islands. This paper outlines evidence for the timing and mechanisms of woodland use and deforestation in an area of southern Iceland, which is tracked through the mapping and analysis of charcoal production pits. Precise dating of the use of these charcoal production pits within a Bayesian framewo…
Temporal and Spatial Variations in Freshwater 14 C Reservoir Effects
Lake Mývatn is an interior highland lake in northern Iceland that forms a unique ecosystem of international scientific importance and is surrounded by a landscape rich in archaeological and paleoenvironmental sites. A significant freshwater reservoir effect (FRE) has been identified in carbon from the lake at some Viking (about AD 870–1000) archaeological sites in the wider region (Mývatnssveit). Previous accelerator mass spectrometry (AMS) measu…
Spatial Variation in the Marine Radiocarbon Reservoir Effect Throughout the Scottish Post-Roman to Late Medieval Period
The marine radiocarbon reservoir effect (MRE) occurs as a spatially and temporally dependent variable owing to localized changes in oceanic water composition. This study investigates ΔR values (deviations from the global average MRE whose ΔR = 0) during the period 500–1350 BP for the east coast of Scotland, where a complex estuarine system exists that drains into the semi-enclosed North Sea basin. Due to the availability of suitable archaeologica…
An Icelandic freshwater radiocarbon reservoir effect
A freshwater radiocarbon ( 14 C) reservoir effect (FRE) is a 14 C age offset between the atmospheric and freshwater carbon reservoirs. FREs can be on the order of 10 000 14 C yr in extreme examples and are a crucial consideration for 14 C dating of palaeoenvironmental and archaeological samples. Correction for a FRE may be possible, provided the FRE and the proportion of FRE-affected carbon within a sample can be accurately quantified. However, a…
Examining the Inherent Variability in ΔR
Currently, there is significant ongoing research into the temporal and spatial variability of marine radiocarbon reservoir effects (MREs) through quantification of ΔR values. In turn, MRE studies often use large changes in ΔR values as proxies for changes in ocean circulation. ΔR values are published in a variety of formats with variations in how the errors on these values are calculated, making it difficult to identify trends or to compare value…
Geology (12 works) · Geology and Paleoclimatology Research (12 works) · Geography (11 works) · Paleontology (10 works) · Archaeology and ancient environmental studies (9 works) · Radiocarbon dating (9 works) · Archaeology (8 works) · Physical geography (7 works) · Oceanography (6 works) · Tephra (5 works)