Solid electrical conductivity (ECM) from four Agassiz ice cores, Ellesmere Island NWT, Canada
High-resolution signal and noise over the last millennium and low resolution over the Holocene
Bibliographic Data
| ID | 12268255 |
|---|---|
| Authors | Jiancheng Zheng (0000-0003-4016-2509, corresponding author), Akira Kudo (0000-0001-6289-3391, National Research Council, Montreal Rd Campus, Building M12, Ottawa, Ontario K1A 0R6, Canada), David Fisher (0000-0002-0719-1765, Geological Survey of Canada), David A Fisher (Geological Survey of Canada), Erik W Blake, Michael D Gerasimoff (0000-0001-5024-153X), M Gerasimoff (Icefield Instruments Inc., Box 5567, Whitehorse, Yukon Y1A 5H4, NWT, Canada) |
| Year | 1998 |
| Volume | 8 |
| Issue | 4 |
| Pages | 413-421 |
| Publication date | 1998-05-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | The Holocene (JOURNAL) |
| Journal identifiers | ISSN: 0959-6836 • E-ISSN: 1477-0911 |
| Publisher | SAGE Publishing (PUBLISHER • US) |
| DOI | 10.1191/095968398676187747 |
| OpenAlex | W1974505143 |
| Language | EN |
| Citations received | 6 |
| References cited | 19 |
The solid DC electrical conductivity (ECM – Electrical Conductivity Method) of polar ice cores has become an important tool in identifying and quantifying volcanic acid layers, and this paper addresses the question of how much signal and noise there is in single ECM series. A number of high-resolution (10 samples/year) ice-core ECM records from the Agassiz Ice Cap are correlated over the last 900 years. Corre lations decrease with distance apart due to local drift and melt layer noise, but correlations are probably reduced also by differences in methodology and core storage. It is found that only peak sizes in the uppermost two percentiles retain their ranking and recognizability from core to core. With continuous sampling, however, the smaller peaks can be cross-identified between cores, even though they lose their size rank. Averaging or stacking several ECM records reduces the noise. Five-year averages of ECM for the Holocene are presented for the Agassiz cores and their correlations interpreted as functions of distance apart and differences in method. The large-scale melting in the early Holocene (8ka to 10ka) almost completely de-acidifies the ice in all the Agas siz cores
Geography · Holocene · Ice core · Ice sheet · Mineralogy · Noise (video · Physical geography · Volcano · Climate change and permafrost · Geology and Paleoclimatology Research · Geophysical and Geoelectrical Methods · Geology · Oceanography · Paleontology
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Signal and noise in four ice-core records from the Agassiz Ice Cap, Ellesmere Island, Canada
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Meddelelser Om Gronland
| Unique citing works | 6 |
|---|---|
| Citations per year | 0,23 |
| Citation span | 2000 - 2014 (15) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 4 |