Holocene climate history from ice cores, snow profiles, the glacial system and local climate patterns from the Mt Erebus Saddle, Antarctica
Entry ID:
K049_1999_2008_NZ_7
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Summary
Abstract:
To understand the drivers and consequences of climate change on timescales important to humans, the paleoclimate of ice cores, the glacial system and local climate patterns were analysed from Mt Erebus Saddle. Mt Erebus Saddle lies in the pathway of the El Nino Southern Oscillation (ENSO) initiated katabatic surges across the Ross Ice Shelf and also of enhanced cyclonic activity from the Southern ... Ocean. Ice core records from Mt Erebus Saddle are likely to show strong ENSO influence and therefore may provide a mean to reconstruct ENSO since its initiation in the early Holocene. A GPR/GPS (35MHz ) survey was made to map the bedrock topography and internal structure of the glacier. Two cores (200 and 160m) were extracted, measured and logged. Each 1m long core had its core temperature measured (within 5 mins of core recovery), weighed to calculate density and determine the depth of bubble close off and firn/ice transition and investigated for crystal structure, melt and dust/tephra layer occurrence. Analysis of volume, grain size and mineralogy was taken to determine the source and to infer wind pattern and strength. Small chips were used to study gas bubble properties (including porosity, gas bubble size and geometry). The borehole was measured for temperature and light penetrations after drilling. The borehole was measured for temperature and light penetrations after drilling. Several snow profiles were sampled with 1cm resolution for analysis on snow chemistry, isotopic composition, dust content and mineralogy. The ice cores and snow samples were measured for major cations, anions and methylsulfonate, trace elements, oxygen and hydrogen isotope ratio, gas analysis in ice core bubbles (CO2 and CH4), dust concentration and mineralogy, Si detection and tritium concentration and dating the ice core. Three snow stakes, 6m long were anchored into the ground to measure the accumulation rate at the drill site as the topography promotes strong winds leading to significant compaction of the surface snow. 
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Description:
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Geographic Coverage
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Spatial coordinates
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N: 46.03
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S: 45.94
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E: -77.35
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W: -77.46
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Data Set Citation
Dataset Originator/Creator:
Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre
Dataset Title:
Petawawa National Forestry Institute (PNFI) High-Resolution Imagery Project 88-220, Canada
Dataset Release Date:
19930811
Dataset Release Place:
Petawawa, Ontario, Canada
Dataset Publisher:
Natural Resources Canada, Canadian Forest Service
Quality
For details on the accuracy of the MEIS II sensor, see references in the open
literature, including some of those cited under the Supplemental Information
field.
Minor scattered clouds are visible in segments of both flight lines. On the
Headquarters line for the MEIS data, a small cloud patch is present between
lines 8130 ... and 8983. On the Sturgeon line (also in the MEIS data), several
cloud patches are visible at the north end of the image. The MEIS data show
some along-track striping in the blue band, and a few anomalously bright or
dark streaks.
More detailed information may be reported, if applicable, in section Lineage
- Process Steps.
See Attribute Accuracy Report
High-resolution image data covering both Sturgeon (5NW) and
Headquarters (6N) lines in the Petawawa Research Forest, were acquired August
16, 1988. The radiometrically corrected, normalized, bad-data-corrected,
aircraft track MEIS II data are stored on the main distribution tape in the DRS
lab at PFC. The raw airborne MSS data are stored on two 8mm Exabyte tapes in
the DRS equipment room also at PFC.
Access Constraints
Access to the data set is restricted and licence agreements from the data
holders may be in effect. Data may be available under certain conditions. See
Distribution Information for details.
Use Constraints
The data, if provided, are offered for the sole use of the receiving party, and
may not be distributed further.
This data set is offered with no warranty. The Government of Canada accepts no
liability for any use or misuse of the data.
Data Set Progress
IN WORK
Personnel
Role:
DIF AUTHOR
Phone:
+01-250-363-0600
Fax:
+01-250-363-0775
Email:
dleckie at pfc.forestry.ca
City:
Victoria
Province or State:
British Columbia
Postal Code:
V8Z 1M5
Country:
Canada
Role:
TECHNICAL CONTACT
Phone:
+01-250-363-0600
Fax:
+01-250-363-0775
Email:
dleckie at pfc.forestry.ca
City:
Victoria
Province or State:
British Columbia
Postal Code:
V8Z 1M5
Country:
Canada
Publications/References
Cloney, E.E., D.G. Leckie, and M. Gillis, 1994. The PNFI data set - MEIS imagery, ground truth and training areas, Version 2. Forestry Canada data report, Petawawa National Forestry Institute.
Leckie, D.G., 1993. Application of airborne multispectral scanning to
forest inventory mapping. Proceedings of the International Forum on Airborne Multispectral Scanning for Forestry and Mapping (with Emphasis on MEIS), Val-Morin, Quebec, April 1992, Information Report PI-X-113 of the Petawawab National Forestry Institute, Forestry Canada, eds. D.G. Leckie and M.D. Gillis, pp. 86-93.
Leckie, D.G., and F. Gougeon, 1998. A study to assess both visual and
automated tree counting and species identification. Proceedings of the
International Forum on Automated Interpretation of High Spatial Resolution
Digitial Imagery for Forestry, February 10-12, 1998, Pacific Forestry Centre, Victoria, B.C., in press.
McColl, W.D., R.A. Neville, and S.M. Till, 1984. Multi-detector
electro-optical imaging scanner MEIS II. Proceedings, 8th Canadian Symposium on Remote Sensing, pp. 71-79.
Zwick, H.H., W.D. McColl, and H.R. Edel, 1980. The CCRS DS1260
airborne multispectral scanner (MSS). Proceedings, 6th Canadian Symposium on Remote Sensing, Halifax, N.S., Canada, May 21-23, 1980, pp. 643-648.
Creation and Review Dates
DIF Creation Date:
2001-08-08
Last DIF Revision Date:
2005-03-28
Future DIF Review Date:
2005-10-23
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