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: 45.83
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S: 44.25
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E: -63.5
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W: -67.17
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Data Set Citation
Dataset Originator/Creator:
Pohle, G., Van Guelpen, L., Martin, A., Welshman, D., and A. McGuire
Dataset Title:
Bay of Fundy Species Information System
Dataset Series Name:
Atlantic Reference Centre Digital Collections
Dataset Release Date:
2004
Dataset Release Place:
Bedford Institute of Oceanography, Dartmouth, Nova Scotia Canada
Dataset Publisher:
OBIS Canada
Version:
1
Data Presentation Form:
Digital
Temporal Coverage
Start Date:
1900-01-01
Stop Date:
2004-12-31
Quality
See the Marine Science Support Data Quality and Programmer's Reports at the Related URL section.
Please see the Marine Science Support Data Quality Report via the Related URL section.
Where data for a particular sensor do not exist for a particular time, the last known value is used unless the sensor has been disabled or has encountered an error. For example, some sensors only record data every minute, but the resolution for the underway dataset is 10 seconds, so the same value will be used 6 times a minute. No averages are taken for sensors that capture data at a rate other than every 10 seconds. Instead, each record will be a snapshot of each sensor at that time.
Access Constraints
Data are available online via the Australian Antarctic Division Data Centre web page.
Data Set Progress
COMPLETE
Personnel
Role:
INVESTIGATOR
Role:
TECHNICAL CONTACT
Role:
DIF AUTHOR
Phone:
+61 3 6232 3106
Email:
jono.reeve at aad.gov.au
Contact Address:
203 Channel Highway
Australian Antarctic Division
City:
Kingston
Province or State:
Tasmania
Postal Code:
7050
Country:
Australia
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date:
2001-05-08
Last DIF Revision Date:
2013-05-07
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