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New Zealand International Transantarctic Scientific Expedition (NZ ITASE) - Climate variability measured from ice cores taken along the Victoria Land Coast

Entry ID: K049_1999_2008_NZ_1

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Summary

Abstract: The climate of the Victoria Land Coast is created by the interacting influences of the Dry Valleys, East Antarctic Ice Sheet and the Ross Sea. Slight changes can significantly alter local weather patterns and as such a climate record of the area provides ideal opportunities to study rapid, high frequency climatic variations. International polar ice coring programmes (e.g. GISP and Vostok) have ... provided powerful new insights into Earth's climate back 400,000 years, from the diverse inventory of atmospheric information stored both within the ice and trapped air bubbles. To understand and predict the local response to anthropogenically induced global warming seen in these "global" ice cores, the focus of ice core research in Antarctica is moving to the acquisition of high-resolution regional paleoclimatic archives of annual-scale that overlap with and extend the instrumental records of the last 40 years back several thousand years. This has been a key motivation behind the US-led International Transantarctic Scientific Expedition (ITASE) of which New Zealand is a member.

The New Zealand project's objective is to recover a series of ice cores from glaciers along a 14-degree latitudinal transect of the climatically sensitive Victoria Land coastline and thereby directly contribute a critical dataset to ITASE. The NZ ITASE sites (including two sites at Victoria Lower Glacier, Baldwin Glacier, Wilson Piedmont Glacier, Polar Plateau, Evans Piedmont Glacier, Mt Erebus Saddle, Whitehall Glacier, Skinner Saddle and Gawn Ice Piedmont Glacier with future sites planned at Beardmore Glacier, Roosevelt Island, and coastal sites in West Antarctica) have been chosen to capture and quantify the steep climate gradients from the Scott Coast to the Polar Plateau, the local climate system of the McMurdo Dry Valleys, and the effect of altitude within the Transantarctic Mountains. Coastal sites are especially climate sensitive and show potential to archive local, rapid climate change events that are subdued or lost in the 'global' inland ice core records.

Investigation and datasets include: GPR/GPS surveying to map bedrock topography and internal glacial structure and glacier topography, firn and ice cores to quantify the variability of climate record with analysis of temperature, crystal structure, crystal geometry, density of the snow, melt, dust/tephra occurrence, gas content, porosity, gas bubble size and geometry, snow profiles were analysed for ion content, isotopic ratios, dust content, beta radioactivity, chemical properties and mineralogy to transfer functions with the meterological record, borehole temperature and light penetration, submergence velocity measurements to analyse the mass balance of the glaciers, meterological data and ablation measurements.

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Geographic Coverage

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Spatial coordinates

	N: -72.9	S: -77.72	E: 167.67	W: 159.87
Min Altitude: 0 Max Altitude: 2400
Min Depth: 0 Max Depth: 200

Temporal Coverage

Start Date: 1999-11-24

Paleo Temporal Coverage

Chrono Unit:

PHANEROZOIC > CENOZOIC > QUATERNARY > HOLOCENE

Location Keywords

CONTINENT > ANTARCTICA > MT EREBUS SADDLE

CONTINENT > ANTARCTICA > VICTORIA LAND COAST

Science Keywords

BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > FISH

BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > EUPHAUSIIDS (KRILL)

ISO Topic Category

BIOTA

OCEANS

Project

OBIS > OCEAN BIOGEOGRAPHIC INFORMATION SYSTEM

COML > CENSUS OF MARINE LIFE

Quality Taxonomy has been checked against ITIS, Catalogue of Life and World Register of Marine Species databases

Access Constraints None.

Use Constraints Acknowledge the use of specific records from contributing databases in the form appearing in the 'Citation' field thereof (if any); and acknowledge the use of the OBIS facility.

For information purposes, email to obissupport@marine.rutgers.edu the full citation of any publication made (printed or electronic) that cites OBIS or any constituent part.

Recognize the limitations of data in OBIS.

Ancillary Keywords

Animalia

Arthropoda

Data Set Progress

COMPLETE

Originating Center

Vida Silvestre Uruguay

Data Center

International Ocean Biogeographic Information System

Data Center URL: http://www.iobis.org/

Data Center Personnel
Name: EDWARD VANDEN BERGHE Phone: (732) 932-6555 x 565 Fax: (732) 932-8578 Email: evberghe at marine.rutgers.edu, evberghe at iobis.org Contact Address: Institute of Marine and Coastal Sciences Rutgers University 71 Dudley Road City: New Brunswick Province or State: NJ Postal Code: 08901-8521 Country: USA

Distribution

Distribution Media: HTTP

Distribution Format: OBIS Schema

Fees: None

Personnel

GUILLERMO CERVETTO

Role: TECHNICAL CONTACT

Email: guillota at adinet.com.uy

Publications/References

CERVETTO G.; CALLIARI, D.; RODRIGUEZ-GRAÑA, L.; LACEROT, G. & CASTIGLIONI, R. (2006) Zooplancton de ambientes costeros de Uruguay: añadiendo piezas al rompecabezas. IN: R MENAFRA, L RODRÍGUEZ-GALLEGO, F SCARABINO & D CONDE (eds) Bases para la conservación y el manejo de la costa uruguaya. Vida Silvestre Uruguay. 105-111.

Creation and Review Dates

DIF Creation Date: 2008-11-03

Last DIF Revision Date: 2009-01-09

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