Peter Köhler
Biographic Data
| ID | 5597096 |
|---|---|
| NAME | Peter Köhler |
| GIVEN NAMES | Peter |
| FAMILY NAME | Köhler |
| SIGNATURE | KOHLER P |
| AFFILIATIONS | Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung |
| ORCID | 0000-0003-0904-8484 |
| VERIFIED | Yes |
| TOTAL WORKS | 11 |
| TOTAL CITATIONS | 1,147 |
| WORKS AS AUTHOR | 11 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1984 |
| LATEST PUBLICATION YEAR | 2023 |
| H-INDEX | 4 |
Marine Radiocarbon Calibration in Polar Regions
The Marine20 radiocarbon ( 14 C) age calibration curve, and all earlier marine 14 C calibration curves from the IntCal group, must be used extremely cautiously for the calibration of marine 14 C samples from polar regions (outside ∼ 40oS–40oN) during glacial periods. Calibrating polar 14 C marine samples from glacial periods against any Marine calibration curve (Marine20 or any earlier product) using an estimate of ${\rm{\Delta R}}$ , the regiona…
A Response to Community Questions on the Marine20 Radiocarbon Age Calibration Curve
Radiocarbon ( 14 C) concentrations in the oceans are different from those in the atmosphere. Understanding these ocean-atmospheric 14 C differences is important both to estimate the calendar ages of samples which obtained their 14 C in the marine environment, and to investigate the carbon cycle. The Marine20 radiocarbon age calibration curve is created to address these dual aims by providing a global-scale surface ocean record of radiocarbon from…
Marine20—The Marine Radiocarbon Age Calibration Curve (0–55,000 cal BP)
The concentration of radiocarbon ( 14 C) differs between ocean and atmosphere. Radiocarbon determinations from samples which obtained their 14 C in the marine environment therefore need a marine-specific calibration curve and cannot be calibrated directly against the atmospheric-based IntCal20 curve. This paper presents Marine20, an update to the internationally agreed marine radiocarbon age calibration curve that provides a non-polar global-aver…
A Short Note on Marine Reservoir Age Simulations Used in IntCal20
Beyond ~13.9 cal kBP, the IntCal20 radiocarbon ( 14 C) calibration curve is based upon combining data across a range of different archives including corals and planktic foraminifera. In order to reliably incorporate such marine data into an atmospheric curve, we need to resolve these records into their constituent atmospheric signal and marine reservoir age. We present results of marine reservoir age simulations enabling this resolution, applying…
The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)
Radiocarbon ( 14 C) ages cannot provide absolutely dated chronologies for archaeological or paleoenvironmental studies directly but must be converted to calendar age equivalents using a calibration curve compensating for fluctuations in atmospheric 14 C concentration. Although calibration curves are constructed from independently dated archives, they invariably require revision as new data become available and our understanding of the Earth syste…
Permafrost-carbon mobilization in Beringia caused by deglacial meltwater runoff, sea-level rise and warming
During the last deglaciation (18–8 kyr BP), shelf flooding and warming presumably led to a large-scale decomposition of permafrost soils in the mid-to-high latitudes of the Northern Hemisphere. Microbial degradation of old organic matter released from the decomposing permafrost potentially contributed to the deglacial rise in atmospheric CO 2 and also to the declining atmospheric radiocarbon contents (Δ 14 C). The significance of permafrost for t…
Using the Suess effect on the stable carbon isotope to distinguish the future from the past in radiocarbon
The depletion of 14C due to the emission of radiocarbon-free fossil fuels (14C Suess effect) might lead to similar values in future and past radiocarbon signatures potentially introducing ambiguity in dating. I here test if a similar impact on the stable carbon isotope via the 13C Suess effect might help to distinguish between ancient and future carbon sources. To analyze a wide range of possibilities, I add to future emission scenarios carbon di…
Iron fertilisation and century-scale effects of open ocean dissolution of olivine in a simulated CO 2 removal experiment
Carbon dioxide removal (CDR) approaches are efforts to reduce the atmospheric CO2 concentration. Here we use a marine carbon cycle model to investigate the effects of one CDR technique: the open ocean dissolution of the iron-containing mineral olivine. We analyse the maximum CDR potential of an annual dissolution of 3 Pg olivine during the 21st century and focus on the role of the micro-nutrient iron for the biological carbon pump. Distributing t…
Health Beliefs of Marshallese Regarding Type 2 Diabetes
The research grounded in the Health Belief Model provides important contributions that can help advance diabetes self-management efforts within Pacific Islander communities
Geoengineering impact of open ocean dissolution of olivine on atmospheric CO 2 , surface ocean pH and marine biology
Ongoing global warming induced by anthropogenic emissions has opened the debate as to whether geoengineering is a 'quick fix' option. Here we analyse the intended and unintended effects of one specific geoengineering approach, which is enhanced weathering via the open ocean dissolution of the silicate-containing mineral olivine. This approach would not only reduce atmospheric CO2 and oppose surface ocean acidification, but would also impact on ma…
Vom Armenhaus zum Wohlfahrtsstaat
The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)
Radiocarbon ( 14 C) ages cannot provide absolutely dated chronologies for archaeological or paleoenvironmental studies directly but must be converted to calendar age equivalents using a calibration curve compensating for fluctuations in atmospheric 14 C concentration. Although calibration curves are constructed from independently dated archives, they invariably require revision as new data become available and our understanding of the Earth syste…
Marine20—The Marine Radiocarbon Age Calibration Curve (0–55,000 cal BP)
The concentration of radiocarbon ( 14 C) differs between ocean and atmosphere. Radiocarbon determinations from samples which obtained their 14 C in the marine environment therefore need a marine-specific calibration curve and cannot be calibrated directly against the atmospheric-based IntCal20 curve. This paper presents Marine20, an update to the internationally agreed marine radiocarbon age calibration curve that provides a non-polar global-aver…
A Response to Community Questions on the Marine20 Radiocarbon Age Calibration Curve
Radiocarbon ( 14 C) concentrations in the oceans are different from those in the atmosphere. Understanding these ocean-atmospheric 14 C differences is important both to estimate the calendar ages of samples which obtained their 14 C in the marine environment, and to investigate the carbon cycle. The Marine20 radiocarbon age calibration curve is created to address these dual aims by providing a global-scale surface ocean record of radiocarbon from…
A Short Note on Marine Reservoir Age Simulations Used in IntCal20
Beyond ~13.9 cal kBP, the IntCal20 radiocarbon ( 14 C) calibration curve is based upon combining data across a range of different archives including corals and planktic foraminifera. In order to reliably incorporate such marine data into an atmospheric curve, we need to resolve these records into their constituent atmospheric signal and marine reservoir age. We present results of marine reservoir age simulations enabling this resolution, applying…
Vom Armenhaus zum Wohlfahrtsstaat
Geoengineering impact of open ocean dissolution of olivine on atmospheric CO 2 , surface ocean pH and marine biology
Ongoing global warming induced by anthropogenic emissions has opened the debate as to whether geoengineering is a 'quick fix' option. Here we analyse the intended and unintended effects of one specific geoengineering approach, which is enhanced weathering via the open ocean dissolution of the silicate-containing mineral olivine. This approach would not only reduce atmospheric CO2 and oppose surface ocean acidification, but would also impact on ma…
Using the Suess effect on the stable carbon isotope to distinguish the future from the past in radiocarbon
The depletion of 14C due to the emission of radiocarbon-free fossil fuels (14C Suess effect) might lead to similar values in future and past radiocarbon signatures potentially introducing ambiguity in dating. I here test if a similar impact on the stable carbon isotope via the 13C Suess effect might help to distinguish between ancient and future carbon sources. To analyze a wide range of possibilities, I add to future emission scenarios carbon di…
Iron fertilisation and century-scale effects of open ocean dissolution of olivine in a simulated CO 2 removal experiment
Carbon dioxide removal (CDR) approaches are efforts to reduce the atmospheric CO2 concentration. Here we use a marine carbon cycle model to investigate the effects of one CDR technique: the open ocean dissolution of the iron-containing mineral olivine. We analyse the maximum CDR potential of an annual dissolution of 3 Pg olivine during the 21st century and focus on the role of the micro-nutrient iron for the biological carbon pump. Distributing t…
Health Beliefs of Marshallese Regarding Type 2 Diabetes
The research grounded in the Health Belief Model provides important contributions that can help advance diabetes self-management efforts within Pacific Islander communities
Permafrost-carbon mobilization in Beringia caused by deglacial meltwater runoff, sea-level rise and warming
During the last deglaciation (18–8 kyr BP), shelf flooding and warming presumably led to a large-scale decomposition of permafrost soils in the mid-to-high latitudes of the Northern Hemisphere. Microbial degradation of old organic matter released from the decomposing permafrost potentially contributed to the deglacial rise in atmospheric CO 2 and also to the declining atmospheric radiocarbon contents (Δ 14 C). The significance of permafrost for t…
Marine20—The Marine Radiocarbon Age Calibration Curve (0–55,000 cal BP)
The concentration of radiocarbon ( 14 C) differs between ocean and atmosphere. Radiocarbon determinations from samples which obtained their 14 C in the marine environment therefore need a marine-specific calibration curve and cannot be calibrated directly against the atmospheric-based IntCal20 curve. This paper presents Marine20, an update to the internationally agreed marine radiocarbon age calibration curve that provides a non-polar global-aver…
A Short Note on Marine Reservoir Age Simulations Used in IntCal20
Beyond ~13.9 cal kBP, the IntCal20 radiocarbon ( 14 C) calibration curve is based upon combining data across a range of different archives including corals and planktic foraminifera. In order to reliably incorporate such marine data into an atmospheric curve, we need to resolve these records into their constituent atmospheric signal and marine reservoir age. We present results of marine reservoir age simulations enabling this resolution, applying…
The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)
Radiocarbon ( 14 C) ages cannot provide absolutely dated chronologies for archaeological or paleoenvironmental studies directly but must be converted to calendar age equivalents using a calibration curve compensating for fluctuations in atmospheric 14 C concentration. Although calibration curves are constructed from independently dated archives, they invariably require revision as new data become available and our understanding of the Earth syste…
A Response to Community Questions on the Marine20 Radiocarbon Age Calibration Curve
Radiocarbon ( 14 C) concentrations in the oceans are different from those in the atmosphere. Understanding these ocean-atmospheric 14 C differences is important both to estimate the calendar ages of samples which obtained their 14 C in the marine environment, and to investigate the carbon cycle. The Marine20 radiocarbon age calibration curve is created to address these dual aims by providing a global-scale surface ocean record of radiocarbon from…
Marine Radiocarbon Calibration in Polar Regions
The Marine20 radiocarbon ( 14 C) age calibration curve, and all earlier marine 14 C calibration curves from the IntCal group, must be used extremely cautiously for the calibration of marine 14 C samples from polar regions (outside ∼ 40oS–40oN) during glacial periods. Calibrating polar 14 C marine samples from glacial periods against any Marine calibration curve (Marine20 or any earlier product) using an estimate of ${\rm{\Delta R}}$ , the regiona…
Geology (9 works) · Chemistry (6 works) · Geology and Paleoclimatology Research (6 works) · Oceanography (6 works) · Paleontology (6 works) · Radiocarbon dating (6 works) · Archaeology and ancient environmental studies (4 works) · Calibration (4 works) · Calibration curve (4 works) · Environmental Science (4 works)