P E Damon
Biographic Data
| ID | 4053075 |
|---|---|
| NAME | P E Damon |
| GIVEN NAMES | P E |
| FAMILY NAME | Damon |
| SIGNATURE | DAMON P E |
| VERIFIED | No |
| TOTAL WORKS | 14 |
| TOTAL CITATIONS | 1,216 |
| WORKS AS AUTHOR | 14 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1980 |
| LATEST PUBLICATION YEAR | 2004 |
| H-INDEX | 6 |
Intcal04 Terrestrial Radiocarbon Age Calibration, 0–26 Cal Kyr BP
A new calibration curve for the conversion of radiocarbon ages to calibrated (cal) ages has been constructed and internationally ratified to replace IntCal98, which extended from 0–24 cal kyr BP (Before Present, 0 cal BP = AD 1950). The new calibration data set for terrestrial samples extends from 0–26 cal kyr BP, but with much higher resolution beyond 11.4 cal kyr BP than IntCal98. Dendrochronologically-dated tree-ring samples cover the period f…
Secular Variation of Δ 14 C During the Medieval Solar Maximum
The Earth is within the Contemporaneous Solar Maximum (CSM), analogous to the Medieval Solar Maximum (MSM). If this analogy is valid, solar activity will continue to increase well into the 21st century. We have completed 75 single-ring and 10 double-ring measurements from ad 1065 to ad 1150 to obtain information about solar activity during this postulated analog to solar activity during the MSM. δ 14 C decreases steadily during the period ad 1065…
Regional Radiocarbon Effect Due to Thawing of Frozen Earth
Accelerator mass spectrometry (AMS) measurement of 25 single-year tree rings from AD 1861–1885 at ca. ±3.5‰ precision shows no evidence of an anomalous 11-yr cycle of 14 C near the Arctic Circle in the Mackenzie River area. However, the Δ 14 C measurements are lower on average by 2.7 ± 0.9 (ō)‰ relative to 14 C measurements on tree rings from the Pacific Northwest (Stuiver and Braziunas 1993). We attribute this depression of Δ 14 C to thawing of …
Intercomparison of High-Precision 14 C Measurements at the University of Arizona and the Queen's University of Belfast Radiocarbon Laboratories
High-precision measurements were completed concurrently at the University of Arizona and the Queen's University of Belfast on blind samples of Irish oak originally measured for the 1986 radiocarbon calibration curve. Subsequent single-year Sequoiadendron results were decadally averaged and compared with published results on decadal Douglas-fir samples. The results of these intercomparisons show that the Arizona high-precision results compare favo…
Implications of Dipole Moment Secular Variation from 50,000–10,000 Years for the Radiocarbon Record
Sparse paleointensity data from 10–50 ka suggest that the average dipole moment (DM) was 50–75% of the average of 8.67 μ 10 22 A m 2 for the past 5 Ma, and 8.75 μ 10 22 for the past 12 ka. A linear ramp function, increasing the DM from 4 to 8.75 μ 10 22 A m 2 between 50–10 ka BP, generates a total 14 C inventory of 126 dpm/cm e 2 , agreeing very well with an inventory assay of 128 dpm/cm e 2 , which includes 14 C in sediments. With the Lingenfelt…
The Sun as a Low-Frequency Harmonic Oscillator
Solar activity, as expressed by interplanetary solar wind magnetic field fluctuations, modulates the atmospheric production of 14 C. Variations of atmospheric 14 C can be precisely established from the cellulose within annual tree rings, an independently dated conservative archive of atmospheric carbon isotopes. Δ 14 C time series interpretation shows that solar activity has varied with a recurrence period of 2115 ± 15 (95% confidence) yr (Hallst…
Anomalous 11-Year Δ 14 C Cycle at High Latitudes
We find no evidence for an anomalously intense 11-yr cycle in Δ 14 C at high latitudes during the period, AD 1870–1885, as reported by Fan et al . (1983, 1986). However, there does appear to be a regional effect within the MacKenzie River region (67°N, 130°W), with atmospheric 14 C depressed by relative to the Olympic Peninsula. Such an effect would require only 5% of CO 2 in the air mass to have been derived from 5% 14 C-depleted soil gas CO 2 .…
Accelerator mass spectrometry
Geologic map of the Guthrie Quadrangle, Graham and Greenlee counties, Arizona
Atmospheric Radiocarbon
The geomagnetic field is one of the major physical fields of the earth. Because its source is fluid motion in the outer core, it exhibits temporal changes, called secular variation, which are quite rapid compared to most geologic phenomena. The prehistoric secular variation is usually inferred from paleomagnetic data. We will discuss here how changes in the atmospheric 14 C content can be used to gain additional insight into the behavior of the d…
Results of Tests and Measurements from the Nsf Regional Accelerator Facility for Radioisotope Dating
Tests of performance of the tandem accelerator mass spectrometer at the NSF Regional Facility at the University of Arizona are discussed. Results of measurements on some tree rings and on some archaeologic samples are presented
Modeling of Atmospheric Radiocarbon Fluctuations for the Past Three Centuries
Relatively precise quantitative observations of geophysical parameters are available to evaluate the fluctuations of atmospheric 14 C activity during the past three centuries. As reviewed by Damon, Lerman, and Long (1978), these fluctuations seem to result from three factors: 1) changes in the earth's dipole magnetic field intensity, which has been decreasing since the first measurements by Gauss (McDonald and Gunst, 1968); 2) solar modulation of…
Calibration of radiocarbon dates
A calibration is presented for conventional radiocarbon ages ranging from 10 to 7240 years BP and thus covering a calendric range of 8000 years from 6050 BC to AD 1950. Distinctive features of this calibration include 1) an improved data set consisting of 1154 radiocarbon measurements on samples of known age, 2) an extended range over which radiocarbon ages may be calibrated (an additional 530 years), 3) separate 95% confidence intervals (in tabu…
Report On the Workshop On the Calibration of the Radiocarbon Dating Time Scale
From the 10th International Radiocarbon Conference held in Bern, Switzerland and Heidelberg, Germany, August 19-26, 1979
Intcal04 Terrestrial Radiocarbon Age Calibration, 0–26 Cal Kyr BP
A new calibration curve for the conversion of radiocarbon ages to calibrated (cal) ages has been constructed and internationally ratified to replace IntCal98, which extended from 0–24 cal kyr BP (Before Present, 0 cal BP = AD 1950). The new calibration data set for terrestrial samples extends from 0–26 cal kyr BP, but with much higher resolution beyond 11.4 cal kyr BP than IntCal98. Dendrochronologically-dated tree-ring samples cover the period f…
Calibration of radiocarbon dates
A calibration is presented for conventional radiocarbon ages ranging from 10 to 7240 years BP and thus covering a calendric range of 8000 years from 6050 BC to AD 1950. Distinctive features of this calibration include 1) an improved data set consisting of 1154 radiocarbon measurements on samples of known age, 2) an extended range over which radiocarbon ages may be calibrated (an additional 530 years), 3) separate 95% confidence intervals (in tabu…
Anomalous 11-Year Δ 14 C Cycle at High Latitudes
We find no evidence for an anomalously intense 11-yr cycle in Δ 14 C at high latitudes during the period, AD 1870–1885, as reported by Fan et al . (1983, 1986). However, there does appear to be a regional effect within the MacKenzie River region (67°N, 130°W), with atmospheric 14 C depressed by relative to the Olympic Peninsula. Such an effect would require only 5% of CO 2 in the air mass to have been derived from 5% 14 C-depleted soil gas CO 2 .…
Report On the Workshop On the Calibration of the Radiocarbon Dating Time Scale
From the 10th International Radiocarbon Conference held in Bern, Switzerland and Heidelberg, Germany, August 19-26, 1979
Intercomparison of High-Precision 14 C Measurements at the University of Arizona and the Queen's University of Belfast Radiocarbon Laboratories
High-precision measurements were completed concurrently at the University of Arizona and the Queen's University of Belfast on blind samples of Irish oak originally measured for the 1986 radiocarbon calibration curve. Subsequent single-year Sequoiadendron results were decadally averaged and compared with published results on decadal Douglas-fir samples. The results of these intercomparisons show that the Arizona high-precision results compare favo…
Modeling of Atmospheric Radiocarbon Fluctuations for the Past Three Centuries
Relatively precise quantitative observations of geophysical parameters are available to evaluate the fluctuations of atmospheric 14 C activity during the past three centuries. As reviewed by Damon, Lerman, and Long (1978), these fluctuations seem to result from three factors: 1) changes in the earth's dipole magnetic field intensity, which has been decreasing since the first measurements by Gauss (McDonald and Gunst, 1968); 2) solar modulation of…
Regional Radiocarbon Effect Due to Thawing of Frozen Earth
Accelerator mass spectrometry (AMS) measurement of 25 single-year tree rings from AD 1861–1885 at ca. ±3.5‰ precision shows no evidence of an anomalous 11-yr cycle of 14 C near the Arctic Circle in the Mackenzie River area. However, the Δ 14 C measurements are lower on average by 2.7 ± 0.9 (ō)‰ relative to 14 C measurements on tree rings from the Pacific Northwest (Stuiver and Braziunas 1993). We attribute this depression of Δ 14 C to thawing of …
Implications of Dipole Moment Secular Variation from 50,000–10,000 Years for the Radiocarbon Record
Sparse paleointensity data from 10–50 ka suggest that the average dipole moment (DM) was 50–75% of the average of 8.67 μ 10 22 A m 2 for the past 5 Ma, and 8.75 μ 10 22 for the past 12 ka. A linear ramp function, increasing the DM from 4 to 8.75 μ 10 22 A m 2 between 50–10 ka BP, generates a total 14 C inventory of 126 dpm/cm e 2 , agreeing very well with an inventory assay of 128 dpm/cm e 2 , which includes 14 C in sediments. With the Lingenfelt…
The Sun as a Low-Frequency Harmonic Oscillator
Solar activity, as expressed by interplanetary solar wind magnetic field fluctuations, modulates the atmospheric production of 14 C. Variations of atmospheric 14 C can be precisely established from the cellulose within annual tree rings, an independently dated conservative archive of atmospheric carbon isotopes. Δ 14 C time series interpretation shows that solar activity has varied with a recurrence period of 2115 ± 15 (95% confidence) yr (Hallst…
Results of Tests and Measurements from the Nsf Regional Accelerator Facility for Radioisotope Dating
Tests of performance of the tandem accelerator mass spectrometer at the NSF Regional Facility at the University of Arizona are discussed. Results of measurements on some tree rings and on some archaeologic samples are presented
Report On the Workshop On the Calibration of the Radiocarbon Dating Time Scale
From the 10th International Radiocarbon Conference held in Bern, Switzerland and Heidelberg, Germany, August 19-26, 1979
Calibration of radiocarbon dates
A calibration is presented for conventional radiocarbon ages ranging from 10 to 7240 years BP and thus covering a calendric range of 8000 years from 6050 BC to AD 1950. Distinctive features of this calibration include 1) an improved data set consisting of 1154 radiocarbon measurements on samples of known age, 2) an extended range over which radiocarbon ages may be calibrated (an additional 530 years), 3) separate 95% confidence intervals (in tabu…
Geologic map of the Guthrie Quadrangle, Graham and Greenlee counties, Arizona
Atmospheric Radiocarbon
The geomagnetic field is one of the major physical fields of the earth. Because its source is fluid motion in the outer core, it exhibits temporal changes, called secular variation, which are quite rapid compared to most geologic phenomena. The prehistoric secular variation is usually inferred from paleomagnetic data. We will discuss here how changes in the atmospheric 14 C content can be used to gain additional insight into the behavior of the d…
Results of Tests and Measurements from the Nsf Regional Accelerator Facility for Radioisotope Dating
Tests of performance of the tandem accelerator mass spectrometer at the NSF Regional Facility at the University of Arizona are discussed. Results of measurements on some tree rings and on some archaeologic samples are presented
Modeling of Atmospheric Radiocarbon Fluctuations for the Past Three Centuries
Relatively precise quantitative observations of geophysical parameters are available to evaluate the fluctuations of atmospheric 14 C activity during the past three centuries. As reviewed by Damon, Lerman, and Long (1978), these fluctuations seem to result from three factors: 1) changes in the earth's dipole magnetic field intensity, which has been decreasing since the first measurements by Gauss (McDonald and Gunst, 1968); 2) solar modulation of…
Accelerator mass spectrometry
Implications of Dipole Moment Secular Variation from 50,000–10,000 Years for the Radiocarbon Record
Sparse paleointensity data from 10–50 ka suggest that the average dipole moment (DM) was 50–75% of the average of 8.67 μ 10 22 A m 2 for the past 5 Ma, and 8.75 μ 10 22 for the past 12 ka. A linear ramp function, increasing the DM from 4 to 8.75 μ 10 22 A m 2 between 50–10 ka BP, generates a total 14 C inventory of 126 dpm/cm e 2 , agreeing very well with an inventory assay of 128 dpm/cm e 2 , which includes 14 C in sediments. With the Lingenfelt…
The Sun as a Low-Frequency Harmonic Oscillator
Solar activity, as expressed by interplanetary solar wind magnetic field fluctuations, modulates the atmospheric production of 14 C. Variations of atmospheric 14 C can be precisely established from the cellulose within annual tree rings, an independently dated conservative archive of atmospheric carbon isotopes. Δ 14 C time series interpretation shows that solar activity has varied with a recurrence period of 2115 ± 15 (95% confidence) yr (Hallst…
Anomalous 11-Year Δ 14 C Cycle at High Latitudes
We find no evidence for an anomalously intense 11-yr cycle in Δ 14 C at high latitudes during the period, AD 1870–1885, as reported by Fan et al . (1983, 1986). However, there does appear to be a regional effect within the MacKenzie River region (67°N, 130°W), with atmospheric 14 C depressed by relative to the Olympic Peninsula. Such an effect would require only 5% of CO 2 in the air mass to have been derived from 5% 14 C-depleted soil gas CO 2 .…
Intercomparison of High-Precision 14 C Measurements at the University of Arizona and the Queen's University of Belfast Radiocarbon Laboratories
High-precision measurements were completed concurrently at the University of Arizona and the Queen's University of Belfast on blind samples of Irish oak originally measured for the 1986 radiocarbon calibration curve. Subsequent single-year Sequoiadendron results were decadally averaged and compared with published results on decadal Douglas-fir samples. The results of these intercomparisons show that the Arizona high-precision results compare favo…
Regional Radiocarbon Effect Due to Thawing of Frozen Earth
Accelerator mass spectrometry (AMS) measurement of 25 single-year tree rings from AD 1861–1885 at ca. ±3.5‰ precision shows no evidence of an anomalous 11-yr cycle of 14 C near the Arctic Circle in the Mackenzie River area. However, the Δ 14 C measurements are lower on average by 2.7 ± 0.9 (ō)‰ relative to 14 C measurements on tree rings from the Pacific Northwest (Stuiver and Braziunas 1993). We attribute this depression of Δ 14 C to thawing of …
Secular Variation of Δ 14 C During the Medieval Solar Maximum
The Earth is within the Contemporaneous Solar Maximum (CSM), analogous to the Medieval Solar Maximum (MSM). If this analogy is valid, solar activity will continue to increase well into the 21st century. We have completed 75 single-ring and 10 double-ring measurements from ad 1065 to ad 1150 to obtain information about solar activity during this postulated analog to solar activity during the MSM. δ 14 C decreases steadily during the period ad 1065…
Intcal04 Terrestrial Radiocarbon Age Calibration, 0–26 Cal Kyr BP
A new calibration curve for the conversion of radiocarbon ages to calibrated (cal) ages has been constructed and internationally ratified to replace IntCal98, which extended from 0–24 cal kyr BP (Before Present, 0 cal BP = AD 1950). The new calibration data set for terrestrial samples extends from 0–26 cal kyr BP, but with much higher resolution beyond 11.4 cal kyr BP than IntCal98. Dendrochronologically-dated tree-ring samples cover the period f…
Geology (13 works) · Radiocarbon dating (12 works) · Geology and Paleoclimatology Research (10 works) · Archaeology and ancient environmental studies (9 works) · Paleontology (9 works) · Physics (9 works) · Geography (8 works) · Archaeology (5 works) · Atmospheric sciences (5 works) · Geomagnetism and Paleomagnetism Studies (5 works)