The eastern Australian magnetic inclination record
Dating the recent past and re-assessing the historical geomagnetic archive
Bibliographic Data
| ID | 12265241 |
|---|---|
| Authors | SJ Gale (The University of the South Pacific, Fiji, corresponding author), Duncan Cook (0000-0001-5270-4569, Australian Catholic University), DE Cook (The Australian Catholic University, Australia), NJ Dorrington (New South Wales Department of Education and Training, Australia) |
| Year | 2012 |
| Volume | 23 |
| Issue | 3 |
| Pages | 398-415 |
| Publication date | 2012-11-19 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | The Holocene (JOURNAL) |
| Journal identifiers | ISSN: 0959-6836 • E-ISSN: 1477-0911 |
| Publisher | SAGE Publishing (PUBLISHER • US) |
| DOI | 10.1177/0959683612463094 |
| OpenAlex | W1969563822 |
| Language | EN |
| Citations received | 1 |
| References cited | 37 |
A new compilation of historical observations and archaeomagnetic measurements of magnetic inclination for the last 1000 years from eastern Australia (the eastern Australian Inclination Record [ eAIR2012]) has revealed the existence of a well-defined inclination anomaly in the region. Evidence of this magnetic feature has been preserved in sedimentary records from across eastern Australia, though this has not previously been recognised. Analyses of additional sedimentary sequences have confirmed the incidence and timing of this feature, revealing its presence between the 13th and 18th centuries ad. The inclination of the field during this episode appears to have been steeper than at any time since the start of the Holocene. Lake sediment evidence suggests that the anomaly is a composite feature, displaying a distinct peak at cal. ad 1270–1386 (±2 σ uncertainty), reappearing after cal. ad 1431–1651 (±2 σ uncertainty) and disappearing before cal. ad 1822±46 (±2 σ uncertainty). The disappearance of the anomaly is tightly bracketed in the historical record between ad 1770 and 1777. The rapid shift in inclination during the 18th century ad offers considerable potential as a means of dating a critical period of Australian environmental history, an episode that currently lies beyond the reach of established dating methods. This information also provides a valuable constraint on models of regional geomagnetic field change over centennial and millennial timescales. Our examination of the historical record has revealed that the inclination measurements made by the 18 th -century French explorer La Pérouse are consistently erroneous. Since La Pérouse’s data make up 13% of the total body of pre-19th century inclination records, the inclusion of these measurements in global compendia of magnetic observations may seriously skew attempts to model the geomagnetic field. We advocate that La Pérouse’s inclination measurements should therefore be employed only with considerable caution
Anomaly (physics · Archaeomagnetic dating · Earth's magnetic field · Feature (linguistics · Geography · Geologic record · Historical record · Holocene · Magnetic anomaly · Magnetic field · Physical geography · Sedimentary rock · Geology and Paleoclimatology Research · Geomagnetism and Paleomagnetism Studies · Geophysical and Geoelectrical Methods · History · Geology · Paleontology
Holocene Vegetation and Paleoclimatic and Paleomagnetic History from Lake Johnston, Tasmania
The intercept is a poor estimate of a calibrated radiocarbon age
Shcal04 Southern Hemisphere Calibration, 0–11.0 Cal Kyr BP
ANU Radiocarbon Date List III
ANU Radiocarbon Date List V
C Ages and Magnetic Stratigraphy in Three Australian Maars
| Citations per year | 0.13 |
|---|---|
| Citation span | 2018 - 2018 (1) |
| Highly cited | No |