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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
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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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Related URL
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Link:
GET DATA
Description: The IGS global system of satellite tracking stations, Data Centers, and Analysis Centers puts high-quality GPS data and data products on line in near real time to meet the objectives of a wide range of scientific and engineering applications and studies. Link: GET DATA Description: The ice reader database hosts basic data from ice cores of the Antarctic Continent. The goal is to compile a complete list of cores by name, site, location and as much other information as possible Link: GET DATA Description: Publishing Network for Geoscientific & Environmental Data This database contains information regarding stable oxygen isotopes of snow pits at four sites: Polar Plateau, Victoria Lower Glacier, Wilson Piedmont Glacier and Baldwin Valley Glacier Link: VIEW PROJECT HOME PAGE Link: VIEW PROJECT HOME PAGE Link: VIEW PROJECT HOME PAGE Description: Web pages dealing with the ITASE project Link: VIEW RELATED INFORMATION Link: VIEW RELATED INFORMATION Description: Related information of the investigator Link: VIEW RELATED INFORMATION Description: New Zealand Ice Core Research Laboratory Ice cores are stored here |
Parent DIF
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This data set description is a member of a collection. The collection is described in K049_1999_2008_NZ_1 |
Geographic Coverage
| N: -77.55 | S: -77.55 | E: 167.6666 | W: 167.6666 |
| Min Altitude: 0 | Max Altitude: 1600 | Min Depth: 0 | Max Depth: 200 |
Temporal Coverage
| Start Date: 2003-11-11 |
Paleo_Temporal_Coverage
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Chrono Unit:
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Location Keywords
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CONTINENT
> ANTARCTICA
CONTINENT > ANTARCTICA > SOUTH VICTORIA LAND CONTINENT > ANTARCTICA > EVANS PIEDMONT GLACIER GEOGRAPHIC REGION > POLAR |
Science Keywords
| CRYOSPHERE >GLACIERS/ICE SHEETS >GLACIERS [Definition] |
| PALEOCLIMATE >ICE CORE RECORDS [Definition] |
| CRYOSPHERE >GLACIERS/ICE SHEETS >FIRN [Definition] |
| PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS [Definition] |
| PALEOCLIMATE >LAND RECORDS >BOREHOLES [Definition] |
ISO Topic Category
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CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION |
Instrument
| CORING DEVICES [Information] |
| GPS >Global Positioning System [Information] |
| GPR >Ground Penetrating Radar [Information] |
Project
| LTER >Long-Term Ecological Research [Information] |
| LGP >Latitudinal Gradient Project [Information] |
| EBA >Evolution and Biodiversity in the Antarctic [Information] |
| IPICS >International Partnerships in Ice Core Science [Information] |
| ITASE >INTERNATIONAL TRANS ANTARCTIC SCIENTIFIC EXPEDITION [Information] |
| AGCS >Antarctica and the Global Climate System [Information] |
Quality
| The project is currently ongoing an some of the data is available in various databases which are constantly changing. The investigator is the best person to contact for access to the data. |
Data Set Progress
| IN WORK |
Data Center
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Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand
[Information]
Data Center URL: http://www.antarcticanz.govt.nz/
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Personnel
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NANCY
BERTLER Role: INVESTIGATOR Phone: +64 4 463 6196 Fax: +64 4 463 5186 Email: Nancy.Bertler at vuw.ac.nz Contact Address: Antarctic Research Center Victoria University of Wellington PO BOX 600 City: Wellington Postal Code: 6140 Country: New Zealand |
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CEISHA
POIROT Role: DIF AUTHOR Phone: +64 3 358 0200 Fax: +64 3 358 0211 Email: c.poirot at antarcticanz.govt.nz Contact Address: Antarctica New Zealand Private Bag 4745 City: Christchurch Country: New Zealand |
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SHULAMIT
GORDON Role: DIF AUTHOR Phone: +64 3 358 0200 Fax: +64 3 358 0211 Email: s.gordon at antarcticanz.govt.nz Contact Address: Antarctica New Zealand Private Bag 4745 City: Christchurch Country: New Zealand |
Creation and Review Dates
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SERF Creation Date:
2011-08-25
SERF Last Revision Date: 2011-09-29 |
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