M H Garnett
Datos Biográficos
| ID | 5597129 |
|---|---|
| NOMBRE | M H Garnett |
| NOMBRES | M H |
| APELLIDO | Garnett |
| FIRMA | GARNETT M H |
| AFILIACIONES | Scottish Universities Environmental Research Centre |
| ORCID | 0000-0001-6486-2126 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 22 |
| TOTAL DE CITAS | 48 |
| TOTAL COMO AUTOR | 22 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 1998 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2026 |
| ÍNDICE H | 4 |
Carbonate removal from radiocarbon samples using a “no leach” acid pretreatment to retain mobile organic carbon
Inorganic carbon can be a significant contaminant of radiocarbon samples. It usually occurs in the form of carbonate which must be removed prior to measurement of the organic carbon fraction in a sample. This can be achieved by an acid wash, however, this approach results in the loss of mobile organic carbon components and is therefore unsuitable for situations where all organic carbon in a sample should be retained for measurement (e.g., carbon …
Ramped oxidation and fine scale serial 14 C analyses of saltmarsh soils
Combined ramped oxidation and radiocarbon analysis (RO- 14 C) determines the age of carbon pools that have differing thermochemical stability (decomposability), providing powerful insights for studying the carbon cycle. We performed RO- 14 C of surface soils from a saltmarsh and dated the narrowest temperature intervals so far undertaken for any samples, finding that no modern (post-bomb) 14 C contents were resolved. We compared these ramped oxid…
Processing of samples by ramped oxidation at the Neif Radiocarbon Laboratory, Suerc
Carbon occurs as organic and inorganic matter in numerous complex forms and mixtures. Thermal separation of sample mixtures (e.g. sediment or soil), coupled with radiocarbon analysis, is a valuable approach for investigating the source, residence time, or age of different carbon components. At the NEIF Radiocarbon Laboratory we have built equipment for thermally separating samples for radiocarbon analysis using ramped oxidation. The original inst…
C Measurement of Samples for Environmental Science Applications at the National Environmental Isotope Facility (Neif) Radiocarbon Laboratory, Suerc, Uk
The National Environmental Isotope Facility (NEIF) Radiocarbon Laboratory at the Scottish Universities Environmental Research Centre (SUERC) performs radiocarbon measurement of a wide range of sample matrices for applications in environmental research. Radiocarbon is applied to palaeoenvironmental, palaeoceanographic, and palaeoclimatic investigations, as well as work to understand the source, fate, turnover, and age of carbon in the modern carbo…
A Time-Integrated Sampler for Radiocarbon Analysis of Aquatic Methane
Freshwater ecosystems are responsible for a large proportion of global methane emissions to the atmosphere. The radiocarbon ( 14 C) content of this aquatic methane is useful for determining the age and source of this important greenhouse gas. Several methods already exist for the collection of aquatic methane for radiocarbon analysis, but they tend to only sample over short periods of time, which can make them unsuitable for characterizing aquati…
A Database of Nerc Radiocarbon Measurements Determined by Accelerator Mass Spectrometry
Radiocarbon ( 14 C) measurements undertaken by the NERC Radiocarbon Laboratory using accelerator mass spectrometry (AMS) are now freely available on a new online database. The data presented covers measurement of the wide range of sample types that are processed for research projects in the fields of Earth and environmental science, supported by the United Kingdom’s Natural Environment Research Council. Sample types within the database include or…
A New Ramped Oxidation- 14 C Analysis Facility at the Neif Radiocarbon Laboratory, East Kilbride, Uk
Sample materials such as sediments and soils contain complex mixtures of different carbon-containing compounds. These bulk samples can be split into individual fractions, based on the temperature of thermal decomposition of their components. When coupled with radiocarbon ( 14 C) measurement of the isolated fractions, this approach offers the advantage of directly investigating the residence time, turnover time, source, or age of the different com…
A Highly Portable and Inexpensive Field Sampling Kit for Radiocarbon Analysis of Carbon Dioxide
Radiocarbon ( 14 C) analysis of carbon dioxide (CO 2 ) can be extremely useful in carbon cycle studies because it provides unique information that can infer the age and source of this greenhouse gas. Cartridges containing the CO 2 -adsorbing zeolite molecular sieve are small and highly portable, which makes them more suitable for field campaigns in remote locations compared to some other CO 2 collection methods. However, sampling with molecular s…
Radiocarbon Analysis of Methane at the Nerc Radiocarbon Facility (East Kilbride)
Methane is the second most important anthropogenically produced greenhouse gas, and radiocarbon ( 14 C) analysis is extremely valuable in identifying its age and source in the environment. At the NERC Radiocarbon Facility (East Kilbride, UK) we have developed expertise in analysis of methane 14 C concentration and methodological approaches to field sampling over the past 20 years. This has opened a wide range of applications, which have mainly fo…
Advances in the Radiocarbon Analysis of Carbon dioxide at the Nerc Radiocarbon Facility (East Kilbride) using Molecular sieve Cartridges
Radiocarbon ( 14 C) analysis of carbon dioxide (CO 2 ) provides unique information on the age, turnover and source of this important greenhouse gas, raising the prospect of novel scientific investigations into a range of natural and anthropogenic processes. To achieve these measurements, cartridges containing zeolite molecular sieves are a reliable and convenient method for collecting CO 2 samples. At the NERC Radiocarbon Facility (East Kilbride)…
Abundant pre-industrial carbon detected in Canadian Arctic headwaters
Mobilization of soil/sediment organic carbon into inland waters constitutes a substantial, but poorly-constrained, component of the global carbon cycle. Radiocarbon (14C) analysis has proven a valuable tool in tracing the sources and fate of mobilized carbon, but aquatic 14C studies in permafrost regions rarely detect 'old' carbon (assimilated from the atmosphere into plants and soil prior to AD1950). The emission of greenhouse gases derived from…
Processing of CO 2 Samples Collected Using Zeolite Molecular Sieve for 14 C Analysis at the Nerc Radiocarbon Facility (East Kilbride, UK)
Cartridges containing a zeolite molecular sieve are used for the field collection of CO 2 from a variety of environments (e.g. atmosphere, soil respiration, evasion from surface waters) for accelerator mass spectrometry (AMS) radiocarbon analysis by the NERC Radiocarbon Facility. Previously, sample CO 2 was recovered from the sieves by heating under vacuum prior to cryogenic purification and graphitization. An additional heating and evacuation st…
Radiocarbon and Stable Carbon Analysis of Dissolved Methane and Carbon Dioxide from the Profile of a Raised Peat Bog
We developed and tested a new method to separate CO 2 and CH 4 from bulk gas samples for radiocarbon and stable-carbon analysis that utilizes a zeolite molecular sieve. To validate the technique, tests were performed using a suite of standard gases, composed of CO 2 and CH 4 of distinctly different isotopic composition. We employed the method to investigate the carbon isotopic composition of samples of dissolved CO 2 and CH 4 collected in situ fr…
Nerc Radiocarbon Age Measurements Determined By Radiometric Counting 1996–2005
We describe a new compilation of radiocarbon age measurements performed by the NERC Radiocarbon Laboratory that is freely available to access over the World Wide Web. The database contains 1000 14 C measurements performed using the liquid scintillation counting method between 1996 and 2005, and further results will be added as the information is compiled. Contextual information including sampling location and the nature of sample material is prov…
The use of ‘bomb spike’ calibration and high-precision AMS 14 C analyses to date salt-marsh sediments deposited during the past three centuries
A combination of ‘bomb spike’ calibration and conventional calibration of AMS 14 C dating has been used to determine a detailed age-depth model for a 1-m sediment section collected from a salt marsh in Poole Harbour, southern England. These data were compared with the chronology obtained from 210 Pb analysis and 137 Cs age markers. We report post bomb values of over 1.46 F 14 C (> 146% modern 14 C), and both the rising and falling limbs of the at…
Do Riparian Plants Fix CO 2 Lost by Evasion from Surface Waters? An Investigation Using Carbon Isotopes
Rivers and streams in many parts of the world contain high concentrations of dissolved carbon dioxide, which is lost to the atmosphere by evasion (outgassing). Recent methodological advances now enable the carbon isotopic composition of this evaded CO 2 to be measured directly, with early results from peatland streams showing it to be depleted in 13 C relative to the atmosphere. The first direct measurements of the radiocarbon age of evaded CO 2 …
Spatial Variability of Bomb 14 C in an Upland Peat Bog
As part of a study investigating the carbon balance of a blanket bog, we made an assessment of the spatial variation of radiocarbon concentrations in the surface layers of a small area of peatland in the north of England. The peat depth at which bomb- 14 C content was the highest varied considerably between cores sampled from across the site. At several sampling locations, 14 C levels >100% Modern were confined to the surface 8 cm, whereas bomb 1…
A Direct Method to Measure 14 CO 2 Lost by Evasion from Surface Waters
Recent methodological advances in the use of zeolite molecular sieves for measuring the isotopic signature of CO 2 have provided the opportunity to make direct measurements of 14 CO2 in various field situations. We linked a portable molecular sieve/pump/IRGA system to a floating chamber to demonstrate the potential of the method to quantify the isotopic signature (δ 13 C and 14 C) of CO 2 lost by evasion (outgassing) from surface waters. The syst…
Carbon Dioxide Capture Using a Zeolite Molecular Sieve Sampling System for Isotopic Studies ( 13 C and 14 C) of Respiration
A method for collecting an isotopically representative sample of CO 2 from an air stream using a zeolite molecular sieve is described. A robust sampling system was designed and developed for use in the field that includes reusable molecular sieve cartridges, a lightweight pump, and a portable infrared gas analyzer (IRGA). The system was tested using international isotopic standards ( 13 C and 14 C). Results showed that CO 2 could be trapped and r…
Testing the Use of Bomb Radiocarbon to Date the Surface Layers of Blanket Peat
The recently formed surface layers of peatlands are archives of past environmental conditions and can have a temporal resolution considerably greater than deeper layers. The low density and conditions of fluctuating water table have hindered attempts to construct chronologies for these peats. We tested the use of the radiocarbon bomb pulse to date recently accumulated peat in a blanket mire. The site was chosen because the peat profiles contained…
Effects of burning and grazing on carbon sequestration in a Pennine blanket bog, UK
Terrestrial ecosystems contain large amounts of carbon (C) and have the potential to significantly increase atmospheric carbon dioxide (CO 2 ) concentrations. Peatlands are particularly important for C storage, although little is known about the effects of anthropogenic activities on C balance in these ecosystems. Sheep-grazing and rotational burning are widely practised on blanket peat moorlands in the United Kingdom. The effects of these activi…
Use of near-infrared reflectance spectroscopy (Nirs) in palaeoecological studies of peat
Bulk density, degree of humification,% moisture content and the% occurrence of plant macrofossils were determined down a single peat core. Near-infrared reflectance spectroscopy (NIRS) was used to obtain spectra for each sample and calibration equations were developed between the conventional analyses and the NIRS spectra using modified partial least squares and stepwise regressions. Conventional analyses were then correlated with values predicte…
Carbon Dioxide Capture Using a Zeolite Molecular Sieve Sampling System for Isotopic Studies ( 13 C and 14 C) of Respiration
A method for collecting an isotopically representative sample of CO 2 from an air stream using a zeolite molecular sieve is described. A robust sampling system was designed and developed for use in the field that includes reusable molecular sieve cartridges, a lightweight pump, and a portable infrared gas analyzer (IRGA). The system was tested using international isotopic standards ( 13 C and 14 C). Results showed that CO 2 could be trapped and r…
Effects of burning and grazing on carbon sequestration in a Pennine blanket bog, UK
Terrestrial ecosystems contain large amounts of carbon (C) and have the potential to significantly increase atmospheric carbon dioxide (CO 2 ) concentrations. Peatlands are particularly important for C storage, although little is known about the effects of anthropogenic activities on C balance in these ecosystems. Sheep-grazing and rotational burning are widely practised on blanket peat moorlands in the United Kingdom. The effects of these activi…
Radiocarbon Analysis of Methane at the Nerc Radiocarbon Facility (East Kilbride)
Methane is the second most important anthropogenically produced greenhouse gas, and radiocarbon ( 14 C) analysis is extremely valuable in identifying its age and source in the environment. At the NERC Radiocarbon Facility (East Kilbride, UK) we have developed expertise in analysis of methane 14 C concentration and methodological approaches to field sampling over the past 20 years. This has opened a wide range of applications, which have mainly fo…
Radiocarbon and Stable Carbon Analysis of Dissolved Methane and Carbon Dioxide from the Profile of a Raised Peat Bog
We developed and tested a new method to separate CO 2 and CH 4 from bulk gas samples for radiocarbon and stable-carbon analysis that utilizes a zeolite molecular sieve. To validate the technique, tests were performed using a suite of standard gases, composed of CO 2 and CH 4 of distinctly different isotopic composition. We employed the method to investigate the carbon isotopic composition of samples of dissolved CO 2 and CH 4 collected in situ fr…
Processing of CO 2 Samples Collected Using Zeolite Molecular Sieve for 14 C Analysis at the Nerc Radiocarbon Facility (East Kilbride, UK)
Cartridges containing a zeolite molecular sieve are used for the field collection of CO 2 from a variety of environments (e.g. atmosphere, soil respiration, evasion from surface waters) for accelerator mass spectrometry (AMS) radiocarbon analysis by the NERC Radiocarbon Facility. Previously, sample CO 2 was recovered from the sieves by heating under vacuum prior to cryogenic purification and graphitization. An additional heating and evacuation st…
Advances in the Radiocarbon Analysis of Carbon dioxide at the Nerc Radiocarbon Facility (East Kilbride) using Molecular sieve Cartridges
Radiocarbon ( 14 C) analysis of carbon dioxide (CO 2 ) provides unique information on the age, turnover and source of this important greenhouse gas, raising the prospect of novel scientific investigations into a range of natural and anthropogenic processes. To achieve these measurements, cartridges containing zeolite molecular sieves are a reliable and convenient method for collecting CO 2 samples. At the NERC Radiocarbon Facility (East Kilbride)…
Testing the Use of Bomb Radiocarbon to Date the Surface Layers of Blanket Peat
The recently formed surface layers of peatlands are archives of past environmental conditions and can have a temporal resolution considerably greater than deeper layers. The low density and conditions of fluctuating water table have hindered attempts to construct chronologies for these peats. We tested the use of the radiocarbon bomb pulse to date recently accumulated peat in a blanket mire. The site was chosen because the peat profiles contained…
C Measurement of Samples for Environmental Science Applications at the National Environmental Isotope Facility (Neif) Radiocarbon Laboratory, Suerc, Uk
The National Environmental Isotope Facility (NEIF) Radiocarbon Laboratory at the Scottish Universities Environmental Research Centre (SUERC) performs radiocarbon measurement of a wide range of sample matrices for applications in environmental research. Radiocarbon is applied to palaeoenvironmental, palaeoceanographic, and palaeoclimatic investigations, as well as work to understand the source, fate, turnover, and age of carbon in the modern carbo…
A Direct Method to Measure 14 CO 2 Lost by Evasion from Surface Waters
Recent methodological advances in the use of zeolite molecular sieves for measuring the isotopic signature of CO 2 have provided the opportunity to make direct measurements of 14 CO2 in various field situations. We linked a portable molecular sieve/pump/IRGA system to a floating chamber to demonstrate the potential of the method to quantify the isotopic signature (δ 13 C and 14 C) of CO 2 lost by evasion (outgassing) from surface waters. The syst…
A New Ramped Oxidation- 14 C Analysis Facility at the Neif Radiocarbon Laboratory, East Kilbride, Uk
Sample materials such as sediments and soils contain complex mixtures of different carbon-containing compounds. These bulk samples can be split into individual fractions, based on the temperature of thermal decomposition of their components. When coupled with radiocarbon ( 14 C) measurement of the isolated fractions, this approach offers the advantage of directly investigating the residence time, turnover time, source, or age of the different com…
A Highly Portable and Inexpensive Field Sampling Kit for Radiocarbon Analysis of Carbon Dioxide
Radiocarbon ( 14 C) analysis of carbon dioxide (CO 2 ) can be extremely useful in carbon cycle studies because it provides unique information that can infer the age and source of this greenhouse gas. Cartridges containing the CO 2 -adsorbing zeolite molecular sieve are small and highly portable, which makes them more suitable for field campaigns in remote locations compared to some other CO 2 collection methods. However, sampling with molecular s…
Nerc Radiocarbon Age Measurements Determined By Radiometric Counting 1996–2005
We describe a new compilation of radiocarbon age measurements performed by the NERC Radiocarbon Laboratory that is freely available to access over the World Wide Web. The database contains 1000 14 C measurements performed using the liquid scintillation counting method between 1996 and 2005, and further results will be added as the information is compiled. Contextual information including sampling location and the nature of sample material is prov…
Do Riparian Plants Fix CO 2 Lost by Evasion from Surface Waters? An Investigation Using Carbon Isotopes
Rivers and streams in many parts of the world contain high concentrations of dissolved carbon dioxide, which is lost to the atmosphere by evasion (outgassing). Recent methodological advances now enable the carbon isotopic composition of this evaded CO 2 to be measured directly, with early results from peatland streams showing it to be depleted in 13 C relative to the atmosphere. The first direct measurements of the radiocarbon age of evaded CO 2 …
Spatial Variability of Bomb 14 C in an Upland Peat Bog
As part of a study investigating the carbon balance of a blanket bog, we made an assessment of the spatial variation of radiocarbon concentrations in the surface layers of a small area of peatland in the north of England. The peat depth at which bomb- 14 C content was the highest varied considerably between cores sampled from across the site. At several sampling locations, 14 C levels >100% Modern were confined to the surface 8 cm, whereas bomb 1…
Use of near-infrared reflectance spectroscopy (Nirs) in palaeoecological studies of peat
Bulk density, degree of humification,% moisture content and the% occurrence of plant macrofossils were determined down a single peat core. Near-infrared reflectance spectroscopy (NIRS) was used to obtain spectra for each sample and calibration equations were developed between the conventional analyses and the NIRS spectra using modified partial least squares and stepwise regressions. Conventional analyses were then correlated with values predicte…
Use of near-infrared reflectance spectroscopy (Nirs) in palaeoecological studies of peat
Bulk density, degree of humification,% moisture content and the% occurrence of plant macrofossils were determined down a single peat core. Near-infrared reflectance spectroscopy (NIRS) was used to obtain spectra for each sample and calibration equations were developed between the conventional analyses and the NIRS spectra using modified partial least squares and stepwise regressions. Conventional analyses were then correlated with values predicte…
Effects of burning and grazing on carbon sequestration in a Pennine blanket bog, UK
Terrestrial ecosystems contain large amounts of carbon (C) and have the potential to significantly increase atmospheric carbon dioxide (CO 2 ) concentrations. Peatlands are particularly important for C storage, although little is known about the effects of anthropogenic activities on C balance in these ecosystems. Sheep-grazing and rotational burning are widely practised on blanket peat moorlands in the United Kingdom. The effects of these activi…
Testing the Use of Bomb Radiocarbon to Date the Surface Layers of Blanket Peat
The recently formed surface layers of peatlands are archives of past environmental conditions and can have a temporal resolution considerably greater than deeper layers. The low density and conditions of fluctuating water table have hindered attempts to construct chronologies for these peats. We tested the use of the radiocarbon bomb pulse to date recently accumulated peat in a blanket mire. The site was chosen because the peat profiles contained…
Carbon Dioxide Capture Using a Zeolite Molecular Sieve Sampling System for Isotopic Studies ( 13 C and 14 C) of Respiration
A method for collecting an isotopically representative sample of CO 2 from an air stream using a zeolite molecular sieve is described. A robust sampling system was designed and developed for use in the field that includes reusable molecular sieve cartridges, a lightweight pump, and a portable infrared gas analyzer (IRGA). The system was tested using international isotopic standards ( 13 C and 14 C). Results showed that CO 2 could be trapped and r…
A Direct Method to Measure 14 CO 2 Lost by Evasion from Surface Waters
Recent methodological advances in the use of zeolite molecular sieves for measuring the isotopic signature of CO 2 have provided the opportunity to make direct measurements of 14 CO2 in various field situations. We linked a portable molecular sieve/pump/IRGA system to a floating chamber to demonstrate the potential of the method to quantify the isotopic signature (δ 13 C and 14 C) of CO 2 lost by evasion (outgassing) from surface waters. The syst…
The use of ‘bomb spike’ calibration and high-precision AMS 14 C analyses to date salt-marsh sediments deposited during the past three centuries
A combination of ‘bomb spike’ calibration and conventional calibration of AMS 14 C dating has been used to determine a detailed age-depth model for a 1-m sediment section collected from a salt marsh in Poole Harbour, southern England. These data were compared with the chronology obtained from 210 Pb analysis and 137 Cs age markers. We report post bomb values of over 1.46 F 14 C (> 146% modern 14 C), and both the rising and falling limbs of the at…
Do Riparian Plants Fix CO 2 Lost by Evasion from Surface Waters? An Investigation Using Carbon Isotopes
Rivers and streams in many parts of the world contain high concentrations of dissolved carbon dioxide, which is lost to the atmosphere by evasion (outgassing). Recent methodological advances now enable the carbon isotopic composition of this evaded CO 2 to be measured directly, with early results from peatland streams showing it to be depleted in 13 C relative to the atmosphere. The first direct measurements of the radiocarbon age of evaded CO 2 …
Spatial Variability of Bomb 14 C in an Upland Peat Bog
As part of a study investigating the carbon balance of a blanket bog, we made an assessment of the spatial variation of radiocarbon concentrations in the surface layers of a small area of peatland in the north of England. The peat depth at which bomb- 14 C content was the highest varied considerably between cores sampled from across the site. At several sampling locations, 14 C levels >100% Modern were confined to the surface 8 cm, whereas bomb 1…
Nerc Radiocarbon Age Measurements Determined By Radiometric Counting 1996–2005
We describe a new compilation of radiocarbon age measurements performed by the NERC Radiocarbon Laboratory that is freely available to access over the World Wide Web. The database contains 1000 14 C measurements performed using the liquid scintillation counting method between 1996 and 2005, and further results will be added as the information is compiled. Contextual information including sampling location and the nature of sample material is prov…
Radiocarbon and Stable Carbon Analysis of Dissolved Methane and Carbon Dioxide from the Profile of a Raised Peat Bog
We developed and tested a new method to separate CO 2 and CH 4 from bulk gas samples for radiocarbon and stable-carbon analysis that utilizes a zeolite molecular sieve. To validate the technique, tests were performed using a suite of standard gases, composed of CO 2 and CH 4 of distinctly different isotopic composition. We employed the method to investigate the carbon isotopic composition of samples of dissolved CO 2 and CH 4 collected in situ fr…
Processing of CO 2 Samples Collected Using Zeolite Molecular Sieve for 14 C Analysis at the Nerc Radiocarbon Facility (East Kilbride, UK)
Cartridges containing a zeolite molecular sieve are used for the field collection of CO 2 from a variety of environments (e.g. atmosphere, soil respiration, evasion from surface waters) for accelerator mass spectrometry (AMS) radiocarbon analysis by the NERC Radiocarbon Facility. Previously, sample CO 2 was recovered from the sieves by heating under vacuum prior to cryogenic purification and graphitization. An additional heating and evacuation st…
Abundant pre-industrial carbon detected in Canadian Arctic headwaters
Mobilization of soil/sediment organic carbon into inland waters constitutes a substantial, but poorly-constrained, component of the global carbon cycle. Radiocarbon (14C) analysis has proven a valuable tool in tracing the sources and fate of mobilized carbon, but aquatic 14C studies in permafrost regions rarely detect 'old' carbon (assimilated from the atmosphere into plants and soil prior to AD1950). The emission of greenhouse gases derived from…
Radiocarbon Analysis of Methane at the Nerc Radiocarbon Facility (East Kilbride)
Methane is the second most important anthropogenically produced greenhouse gas, and radiocarbon ( 14 C) analysis is extremely valuable in identifying its age and source in the environment. At the NERC Radiocarbon Facility (East Kilbride, UK) we have developed expertise in analysis of methane 14 C concentration and methodological approaches to field sampling over the past 20 years. This has opened a wide range of applications, which have mainly fo…
Advances in the Radiocarbon Analysis of Carbon dioxide at the Nerc Radiocarbon Facility (East Kilbride) using Molecular sieve Cartridges
Radiocarbon ( 14 C) analysis of carbon dioxide (CO 2 ) provides unique information on the age, turnover and source of this important greenhouse gas, raising the prospect of novel scientific investigations into a range of natural and anthropogenic processes. To achieve these measurements, cartridges containing zeolite molecular sieves are a reliable and convenient method for collecting CO 2 samples. At the NERC Radiocarbon Facility (East Kilbride)…
A Highly Portable and Inexpensive Field Sampling Kit for Radiocarbon Analysis of Carbon Dioxide
Radiocarbon ( 14 C) analysis of carbon dioxide (CO 2 ) can be extremely useful in carbon cycle studies because it provides unique information that can infer the age and source of this greenhouse gas. Cartridges containing the CO 2 -adsorbing zeolite molecular sieve are small and highly portable, which makes them more suitable for field campaigns in remote locations compared to some other CO 2 collection methods. However, sampling with molecular s…
A New Ramped Oxidation- 14 C Analysis Facility at the Neif Radiocarbon Laboratory, East Kilbride, Uk
Sample materials such as sediments and soils contain complex mixtures of different carbon-containing compounds. These bulk samples can be split into individual fractions, based on the temperature of thermal decomposition of their components. When coupled with radiocarbon ( 14 C) measurement of the isolated fractions, this approach offers the advantage of directly investigating the residence time, turnover time, source, or age of the different com…
C Measurement of Samples for Environmental Science Applications at the National Environmental Isotope Facility (Neif) Radiocarbon Laboratory, Suerc, Uk
The National Environmental Isotope Facility (NEIF) Radiocarbon Laboratory at the Scottish Universities Environmental Research Centre (SUERC) performs radiocarbon measurement of a wide range of sample matrices for applications in environmental research. Radiocarbon is applied to palaeoenvironmental, palaeoceanographic, and palaeoclimatic investigations, as well as work to understand the source, fate, turnover, and age of carbon in the modern carbo…
A Time-Integrated Sampler for Radiocarbon Analysis of Aquatic Methane
Freshwater ecosystems are responsible for a large proportion of global methane emissions to the atmosphere. The radiocarbon ( 14 C) content of this aquatic methane is useful for determining the age and source of this important greenhouse gas. Several methods already exist for the collection of aquatic methane for radiocarbon analysis, but they tend to only sample over short periods of time, which can make them unsuitable for characterizing aquati…
A Database of Nerc Radiocarbon Measurements Determined by Accelerator Mass Spectrometry
Radiocarbon ( 14 C) measurements undertaken by the NERC Radiocarbon Laboratory using accelerator mass spectrometry (AMS) are now freely available on a new online database. The data presented covers measurement of the wide range of sample types that are processed for research projects in the fields of Earth and environmental science, supported by the United Kingdom’s Natural Environment Research Council. Sample types within the database include or…
Processing of samples by ramped oxidation at the Neif Radiocarbon Laboratory, Suerc
Carbon occurs as organic and inorganic matter in numerous complex forms and mixtures. Thermal separation of sample mixtures (e.g. sediment or soil), coupled with radiocarbon analysis, is a valuable approach for investigating the source, residence time, or age of different carbon components. At the NEIF Radiocarbon Laboratory we have built equipment for thermally separating samples for radiocarbon analysis using ramped oxidation. The original inst…
Carbonate removal from radiocarbon samples using a “no leach” acid pretreatment to retain mobile organic carbon
Inorganic carbon can be a significant contaminant of radiocarbon samples. It usually occurs in the form of carbonate which must be removed prior to measurement of the organic carbon fraction in a sample. This can be achieved by an acid wash, however, this approach results in the loss of mobile organic carbon components and is therefore unsuitable for situations where all organic carbon in a sample should be retained for measurement (e.g., carbon …
Ramped oxidation and fine scale serial 14 C analyses of saltmarsh soils
Combined ramped oxidation and radiocarbon analysis (RO- 14 C) determines the age of carbon pools that have differing thermochemical stability (decomposability), providing powerful insights for studying the carbon cycle. We performed RO- 14 C of surface soils from a saltmarsh and dated the narrowest temperature intervals so far undertaken for any samples, finding that no modern (post-bomb) 14 C contents were resolved. We compared these ramped oxid…
Chemistry (17 obras) · Geology (16 obras) · Radiocarbon dating (16 obras) · Environmental Science (15 obras) · Geology and Paleoclimatology Research (12 obras) · Carbon fibers (11 obras) · Archaeology (9 obras) · Geography (8 obras) · Peat (8 obras) · Atmospheric and Environmental Gas Dynamics (7 obras)