Negar Haghipour
Biographic Data
| ID | 4130011 |
|---|---|
| NAME | Negar Haghipour |
| GIVEN NAMES | Negar |
| FAMILY NAME | Haghipour |
| SIGNATURE | HAGHIPOUR N |
| AFFILIATIONS | ETH Zurich |
| ORCID | 0000-0001-8223-0536 |
| VERIFIED | Yes |
| TOTAL WORKS | 17 |
| TOTAL CITATIONS | 9 |
| WORKS AS AUTHOR | 17 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2017 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 2 |
Radiocarbon dating of mortars
The absolute chronology of historical structures in regions with limited documentary evidence or organic remains presents a significant challenge for archaeologists and historians. Radiocarbon dating of anthropogenic carbonates, such as mortar binders, offers a potential solution but is often complicated by contamination from geological carbon sources or post-depositional recrystallization. This study presents the first radiocarbon dates obtained…
A new 14 C sample treatment laboratory at the Maria Curie-Skłodowska University, Lublin, PL
The accuracy and precision of radiocarbon dating largely depend on the quality of sample preparation prior to measurement. Proper selection of material, identification of potential contaminants, and application of appropriate purification procedures are the basis of reliable 14 C analyses. Modern preparation laboratories not only support the process of obtaining reliable results but also play a key role in integrating the scientific community and…
Radiocarbon dating of mortars from monastery hill in Tyniec, Poland
The Benedictine Abbey in Tyniec is the oldest existing monastery in Poland (11th cent. AD). The historic walls of the Monastery have survived to this day and crown the limestone hill on the Vistula River. The geological structure of the surrounding area is reflected in the composition of the mortars. In vicinity of Tyniec one may observe outcrops of Upper Jurassic limestones represented by two facies: bedded limestones with cherts and massive lim…
The Late Weichselian/Holocene transition on the East European Plain
Few sites in the East European Plain have yielded detailed multi-proxy data for the late Weichselian to Holocene transition. This paper provides a comprehensive palaeobotanical analysis of the lower part of a core of biogenic deposits from the Serteya Mire in the western part of the East European Plain (Western Russia). The studied reservoir, is located in a kettle hole and is dated to the Allerød, as confirmed by radiocarbon dating of the basal …
Pollen 14 C dating compared with established dating methods
Radiocarbon ( 14 C) dating is a powerful tool for establishing reliable chronologies for proxy records recovered from environmental archives, including lacustrine sediments. However, lacustrine sediments are often limited with respect to availability of material such as terrestrial macrofossils that are traditionally targeted for 14 C dating. Flow cytometry, in combination with physicochemical preprocessing, is an emerging technique for the isola…
Towards online ramped oxidation (ORO)-AMS for thermal dissection and serial radiocarbon analysis of complex organic matter
By constraining organic carbon (OC) turnover times and ages, radiocarbon ( 14 C) analysis has become a crucial tool to study the global carbon cycle. However, commonly used “bulk” measurements yield average turnover times, masking age variability within complex OC mixtures. One method to unravel intra-sample age distributions is ramped oxidation, in which OC is oxidized with the aid of oxygen at increasing temperatures. The resulting CO 2 is coll…
Mineralogy as a potential driver of irregular radiocarbon patterns among Icelandic fluvial carbon pools
Fluvial export of organic carbon (OC) from the terrestrial biosphere to the ocean forms a key component of the global carbon cycle. Carbon sources and transformations along the land–ocean aquatic continuum are dynamic with a complex interplay between particulate and dissolved organic and inorganic carbon pools (POC, DOC, DIC). Radiocarbon dating serves as a valuable tool, providing crucial insights into turnover and residence times within these p…
A Universal Gas Interface for Simultaneous 14 C and Δ 13 C Measurements
While simultaneous radiocarbon and δ 13 C measurements have been available for organic materials (by accelerator mass spectrometry, AMS, and isotope ratio mass spectrometry, IRMS, respectively), this has not been possible for carbonates until now. Using an existing interface for gas ion source AMS measurements, we developed a prototype for a universal gas interface that allows simultaneous measurement of both carbon isotope ratios from potentiall…
Sample Selection, Characterization and Choice of Treatment for Accurate Radiocarbon Analysis—insights From the Eth Laboratory
Accurate radiocarbon ( 14 C) analysis depends on a successful carbon separation relevant to the studied object. The process of 14 C dating involves the following steps: characterization and sample choice, sample treatment, measurements, and evaluation of the results. Here, we provide an overview of conventional approaches to macromolecular samples and address specific issues such as detecting and removing contamination with roots, dolomite, and c…
Seasonal variability in particulate organic carbon degradation in the Kolyma River, Siberia
Major Arctic rivers are undergoing changes due to climate warming with higher discharge and increased amounts of solutes and organic carbon (OC) draining into rivers and coastal seas. Permafrost thaw mobilizes previously frozen OC to the fluvial network where it can be degraded into greenhouse gases and emitted to the atmosphere. Degradation of OC during downstream transport, especially of the particulate OC (POC), is however poorly characterized…
Preferential export of permafrost-derived organic matter as retrogressive thaw slumping intensifies
Enhanced warming of the Northern high latitudes has intensified thermokarst processes throughout the permafrost zone. Retrogressive thaw slumps (RTS), where thaw-driven erosion caused by ground ice melt creates terrain disturbances extending over tens of hectares, represent particularly dynamic thermokarst features. Biogeochemical transformation of the mobilized substrate may release CO 2 to the atmosphere and impact downstream ecosystems, yet it…
Source forensics of n-alkanes and n-fatty acids in urban aerosols using compound specific radiocarbon/stable carbon isotopic composition
n -Alkanes and fatty acids are important molecular markers for the source apportionment of organic matter in the atmosphere. Traditional approaches to date have mostly relied upon the source-specific differences in their molecular distributions and carbon preference index. Alternatively, we demonstrate here the use of stable carbon and radiocarbon isotopic composition ( δ 13 C and Δ 14 C, respectively) of n -alkanes and n -fatty acids in aerosols…
Warming and monsoonal climate lead to large export of millennial-aged carbon from permafrost catchments of the Qinghai-Tibet Plateau
Permafrost carbon pool destabilization causes substantial fluvial export of soil carbon, yet the export patterns and magnitudes are not well understood. Here we investigated the radiocarbon ( 14 C) in dissolved organic and inorganic carbon (DOC and DIC, respectively) exported from a mid-sized river in the central Qinghai-Tibet Plateau (QTP) permafrost region. We utilized the radiocarbon dating technique to reveal the ages of riverine dissolved ca…
C Blank Assessment in Small-Scale Compound-Specific Radiocarbon Analysis of Lipid Biomarkers and Lignin Phenols
Compound-specific radiocarbon ( 14 C) dating often requires working with small samples of 14 C) and the mass of the procedural blanks introduced during the preparation procedures of lipid biomarkers (i.e. n -alkanoic acids) and lignin phenols. We isolated differently sized aliquots (6–151 μgC) of n -alkanoic acids and lignin phenols obtained from standard materials with known F 14 C values. Each compound class was extracted from two standard mate…
Towards Organic Carbon Isotope Records from Stalagmites
Speleothem organic matter can be a powerful tracer for past environmental conditions and karst processes. Carbon isotope measurements (δ 13 C and 14 C) in particular can provide crucial information on the provenance and age of speleothem organic matter, but are challenging due to low concentrations of organic matter in stalagmites. Here, we present a method development study on extraction and isotopic characterization of speleothem organic matter…
Comprehensive radiocarbon analysis of benzene polycarboxylic acids (BPCAs) derived from pyrogenic carbon in environmental samples
Compound-specific radiocarbon analysis (CSRA) of benzene polycarboxylic acids (BPCAs) yields molecular-level, source-specific information necessary to constrain isotopic signatures of pyrogenic carbon. However, the purification of individual BPCAs requires a multistep procedure that typically results in only microgram quantities of the target analyte(s). Such small samples are highly susceptible to contamination by extraneous carbon, which needs …
Online 13 C and 14 C Gas Measurements by EA-IRMS–AMS at ETH Zürich
Studies using carbon isotopes to understand the global carbon cycle are critical to identify and quantify sources, sinks, and processes and how humans may impact them. 13 C and 14 C are routinely measured individually; however, there is a need to develop instrumentation that can perform concurrent online analyses that can generate rich data sets conveniently and efficiently. To satisfy these requirements, we coupled an elemental analyzer to a sta…
C Blank Assessment in Small-Scale Compound-Specific Radiocarbon Analysis of Lipid Biomarkers and Lignin Phenols
Compound-specific radiocarbon ( 14 C) dating often requires working with small samples of 14 C) and the mass of the procedural blanks introduced during the preparation procedures of lipid biomarkers (i.e. n -alkanoic acids) and lignin phenols. We isolated differently sized aliquots (6–151 μgC) of n -alkanoic acids and lignin phenols obtained from standard materials with known F 14 C values. Each compound class was extracted from two standard mate…
Online 13 C and 14 C Gas Measurements by EA-IRMS–AMS at ETH Zürich
Studies using carbon isotopes to understand the global carbon cycle are critical to identify and quantify sources, sinks, and processes and how humans may impact them. 13 C and 14 C are routinely measured individually; however, there is a need to develop instrumentation that can perform concurrent online analyses that can generate rich data sets conveniently and efficiently. To satisfy these requirements, we coupled an elemental analyzer to a sta…
Sample Selection, Characterization and Choice of Treatment for Accurate Radiocarbon Analysis—insights From the Eth Laboratory
Accurate radiocarbon ( 14 C) analysis depends on a successful carbon separation relevant to the studied object. The process of 14 C dating involves the following steps: characterization and sample choice, sample treatment, measurements, and evaluation of the results. Here, we provide an overview of conventional approaches to macromolecular samples and address specific issues such as detecting and removing contamination with roots, dolomite, and c…
Comprehensive radiocarbon analysis of benzene polycarboxylic acids (BPCAs) derived from pyrogenic carbon in environmental samples
Compound-specific radiocarbon analysis (CSRA) of benzene polycarboxylic acids (BPCAs) yields molecular-level, source-specific information necessary to constrain isotopic signatures of pyrogenic carbon. However, the purification of individual BPCAs requires a multistep procedure that typically results in only microgram quantities of the target analyte(s). Such small samples are highly susceptible to contamination by extraneous carbon, which needs …
Online 13 C and 14 C Gas Measurements by EA-IRMS–AMS at ETH Zürich
Studies using carbon isotopes to understand the global carbon cycle are critical to identify and quantify sources, sinks, and processes and how humans may impact them. 13 C and 14 C are routinely measured individually; however, there is a need to develop instrumentation that can perform concurrent online analyses that can generate rich data sets conveniently and efficiently. To satisfy these requirements, we coupled an elemental analyzer to a sta…
Towards Organic Carbon Isotope Records from Stalagmites
Speleothem organic matter can be a powerful tracer for past environmental conditions and karst processes. Carbon isotope measurements (δ 13 C and 14 C) in particular can provide crucial information on the provenance and age of speleothem organic matter, but are challenging due to low concentrations of organic matter in stalagmites. Here, we present a method development study on extraction and isotopic characterization of speleothem organic matter…
Source forensics of n-alkanes and n-fatty acids in urban aerosols using compound specific radiocarbon/stable carbon isotopic composition
n -Alkanes and fatty acids are important molecular markers for the source apportionment of organic matter in the atmosphere. Traditional approaches to date have mostly relied upon the source-specific differences in their molecular distributions and carbon preference index. Alternatively, we demonstrate here the use of stable carbon and radiocarbon isotopic composition ( δ 13 C and Δ 14 C, respectively) of n -alkanes and n -fatty acids in aerosols…
Warming and monsoonal climate lead to large export of millennial-aged carbon from permafrost catchments of the Qinghai-Tibet Plateau
Permafrost carbon pool destabilization causes substantial fluvial export of soil carbon, yet the export patterns and magnitudes are not well understood. Here we investigated the radiocarbon ( 14 C) in dissolved organic and inorganic carbon (DOC and DIC, respectively) exported from a mid-sized river in the central Qinghai-Tibet Plateau (QTP) permafrost region. We utilized the radiocarbon dating technique to reveal the ages of riverine dissolved ca…
C Blank Assessment in Small-Scale Compound-Specific Radiocarbon Analysis of Lipid Biomarkers and Lignin Phenols
Compound-specific radiocarbon ( 14 C) dating often requires working with small samples of 14 C) and the mass of the procedural blanks introduced during the preparation procedures of lipid biomarkers (i.e. n -alkanoic acids) and lignin phenols. We isolated differently sized aliquots (6–151 μgC) of n -alkanoic acids and lignin phenols obtained from standard materials with known F 14 C values. Each compound class was extracted from two standard mate…
Preferential export of permafrost-derived organic matter as retrogressive thaw slumping intensifies
Enhanced warming of the Northern high latitudes has intensified thermokarst processes throughout the permafrost zone. Retrogressive thaw slumps (RTS), where thaw-driven erosion caused by ground ice melt creates terrain disturbances extending over tens of hectares, represent particularly dynamic thermokarst features. Biogeochemical transformation of the mobilized substrate may release CO 2 to the atmosphere and impact downstream ecosystems, yet it…
Seasonal variability in particulate organic carbon degradation in the Kolyma River, Siberia
Major Arctic rivers are undergoing changes due to climate warming with higher discharge and increased amounts of solutes and organic carbon (OC) draining into rivers and coastal seas. Permafrost thaw mobilizes previously frozen OC to the fluvial network where it can be degraded into greenhouse gases and emitted to the atmosphere. Degradation of OC during downstream transport, especially of the particulate OC (POC), is however poorly characterized…
Mineralogy as a potential driver of irregular radiocarbon patterns among Icelandic fluvial carbon pools
Fluvial export of organic carbon (OC) from the terrestrial biosphere to the ocean forms a key component of the global carbon cycle. Carbon sources and transformations along the land–ocean aquatic continuum are dynamic with a complex interplay between particulate and dissolved organic and inorganic carbon pools (POC, DOC, DIC). Radiocarbon dating serves as a valuable tool, providing crucial insights into turnover and residence times within these p…
A Universal Gas Interface for Simultaneous 14 C and Δ 13 C Measurements
While simultaneous radiocarbon and δ 13 C measurements have been available for organic materials (by accelerator mass spectrometry, AMS, and isotope ratio mass spectrometry, IRMS, respectively), this has not been possible for carbonates until now. Using an existing interface for gas ion source AMS measurements, we developed a prototype for a universal gas interface that allows simultaneous measurement of both carbon isotope ratios from potentiall…
Sample Selection, Characterization and Choice of Treatment for Accurate Radiocarbon Analysis—insights From the Eth Laboratory
Accurate radiocarbon ( 14 C) analysis depends on a successful carbon separation relevant to the studied object. The process of 14 C dating involves the following steps: characterization and sample choice, sample treatment, measurements, and evaluation of the results. Here, we provide an overview of conventional approaches to macromolecular samples and address specific issues such as detecting and removing contamination with roots, dolomite, and c…
The Late Weichselian/Holocene transition on the East European Plain
Few sites in the East European Plain have yielded detailed multi-proxy data for the late Weichselian to Holocene transition. This paper provides a comprehensive palaeobotanical analysis of the lower part of a core of biogenic deposits from the Serteya Mire in the western part of the East European Plain (Western Russia). The studied reservoir, is located in a kettle hole and is dated to the Allerød, as confirmed by radiocarbon dating of the basal …
Pollen 14 C dating compared with established dating methods
Radiocarbon ( 14 C) dating is a powerful tool for establishing reliable chronologies for proxy records recovered from environmental archives, including lacustrine sediments. However, lacustrine sediments are often limited with respect to availability of material such as terrestrial macrofossils that are traditionally targeted for 14 C dating. Flow cytometry, in combination with physicochemical preprocessing, is an emerging technique for the isola…
Towards online ramped oxidation (ORO)-AMS for thermal dissection and serial radiocarbon analysis of complex organic matter
By constraining organic carbon (OC) turnover times and ages, radiocarbon ( 14 C) analysis has become a crucial tool to study the global carbon cycle. However, commonly used “bulk” measurements yield average turnover times, masking age variability within complex OC mixtures. One method to unravel intra-sample age distributions is ramped oxidation, in which OC is oxidized with the aid of oxygen at increasing temperatures. The resulting CO 2 is coll…
Radiocarbon dating of mortars
The absolute chronology of historical structures in regions with limited documentary evidence or organic remains presents a significant challenge for archaeologists and historians. Radiocarbon dating of anthropogenic carbonates, such as mortar binders, offers a potential solution but is often complicated by contamination from geological carbon sources or post-depositional recrystallization. This study presents the first radiocarbon dates obtained…
A new 14 C sample treatment laboratory at the Maria Curie-Skłodowska University, Lublin, PL
The accuracy and precision of radiocarbon dating largely depend on the quality of sample preparation prior to measurement. Proper selection of material, identification of potential contaminants, and application of appropriate purification procedures are the basis of reliable 14 C analyses. Modern preparation laboratories not only support the process of obtaining reliable results but also play a key role in integrating the scientific community and…
Radiocarbon dating of mortars from monastery hill in Tyniec, Poland
The Benedictine Abbey in Tyniec is the oldest existing monastery in Poland (11th cent. AD). The historic walls of the Monastery have survived to this day and crown the limestone hill on the Vistula River. The geological structure of the surrounding area is reflected in the composition of the mortars. In vicinity of Tyniec one may observe outcrops of Upper Jurassic limestones represented by two facies: bedded limestones with cherts and massive lim…
Radiocarbon dating (12 works) · Geology and Paleoclimatology Research (10 works) · Chemistry (9 works) · Geology (9 works) · Archaeology and ancient environmental studies (8 works) · Carbon fibers (7 works) · Environmental Chemistry (6 works) · Isotope Analysis in Ecology (6 works) · Accelerator mass spectrometry (5 works) · Environmental Science (5 works)