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RICE – Roosevelt Island Climate Evolution Project - Deep ice Core

Entry ID: K049_2010_2012_NZ_1

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Summary

Abstract: Roosevelt Island Climate Evolution – RICE Project

The potential for rapid deglaciation of West Antarctica remains a primary uncertainty in the Intergovernmental Panel on Climate Change (IPCC) predictions for 21st Century sea level rise. The recent and unpredicted collapse of multiple ice shelves and rapid acceleration of discharge of Antarctic ice suggests that dynamical responses to warming ... play a more significant role than is currently understood and captured in coupled climate-ice sheet models. Such models can be improved and validated by replicating known past changes. The RICE Project is an international partnership seeking to understand past, present, and future changes of the Ross Ice Shelf, a major drainage pathway of the West Antarctic Ice Sheet. The ANDRILL programme showed, that about 5 to 3 million years ago, the last time when atmospheric carbon dioxide (CO2) concentration and temperatures were similar to those predicted for the end of the 21st Century, the Ross Ice Shelf disintegrated multiple times, initiating the collapse of West Antarctica. However, no high resolution data exist from this time period. To determine the rate of change, RICE aims to provide an annually resolved ice core record for the past 20,000 years and beyond, when global temperatures increased by 6 deg C to preindustrial temperatures, global sea level rose by ~120 m, and the Ross Ice Shelf grounding line retreated over 1,000 km. Most of the Ross Ice Shelf retreat occurred when global sea level had already reached modern levels. For this reason, the precise correlation between increasing air and ocean temperatures, and the velocity and characteristics of the ice shelf retreat, provides a unique opportunity to determine accurately the sensitivity of the Ross Ice Shelf to warming.

In 2011/2012 the deep ice core was drilled using the newly built New Zealand intermediate ice core drilling system. The drilling system is based on the Danish Hans Tausen drill and features a range of technological improvements and new design aspects. Parts of the drilling system were tested twice in Greenland as part of the Danish led NEEM project and fully commissioned for the first time at Roosevelt Island. The drill performed exceptionally well, the average run length averaged between 1.2 and 1.7m and yielded high quality core. Some preliminary core logging included electric conductivity measurements, visual logging, and density measurements. The firn – ice transition was reached at 53m depth below surface, which promises a high resolution gas record. The drill hole was reamed to 65m depth, and the achieved drill depth was 130m below surface.

The firn – ice transition at 53m depth was shallower than expected and promises for an exceptionally high resolution gas record. The core will be processed by the international science community in August 2012 in the NZ Ice Core Research Facility at GNS Science in Lower Hutt, Wellington,NZ.

Related URL

Link: VIEW RELATED INFORMATION

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

	N: -79.36	S: -79.36	E: 161.7	W: 161.7

Max Depth: 130

Data Set Citation

Dataset Originator/Creator: AIRS Science Team/Moustafa Chahine

Dataset Title: AIRS/Aqua Level 1B AMSU (A1/A2) geolocated and calibrated brightness temperatures

Dataset Release Date: 2007-07-26

Dataset Release Place: Greenbelt, MD, USA

Dataset Publisher: Goddard Earth Science Data and Information Services Center (GES DISC)

Version: 005

Data Presentation Form: Digital Science Data

Online Resource: http://disc.sci.gsfc.nasa.gov/AIRS/data-holdings/by-data-product/am...

Temporal Coverage

Start Date: 2002-05-21

Location Keywords

OCEAN > ATLANTIC OCEAN

OCEAN > INDIAN OCEAN

Data Resolution

Latitude Resolution: 40.6 km IFOV at nadir
Longitude Resolution: 40.6 km IFOV at nadir
Temporal Resolution: Twice per day (daytime and nighttime)

Science Keywords

SPECTRAL/ENGINEERING > MICROWAVE > BRIGHTNESS TEMPERATURE

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

IMAGERY/BASE MAPS/EARTH COVER

Platform

AQUA > Earth Observing System, AQUA

Instrument

AMSU-A > Advanced Microwave Sounding Unit-A

Project

EOSDIS > Earth Observing System Data Information System

ESIP > Earth Science Information Partners Program

AQUA > Earth Observing System (EOS), AQUA

CWIC > CEOS WGISS Integrated Catalog

Quality V5_CalVal_Status_Summary.pdf
http://disc.sci.gsfc.nasa.gov/AIRS/documentation/v5_docs/AIRS_V5_Re...

Access Constraints Data are expected to be available from the GSFC Earth Sciences (GES)
Distributed Active Archive Center (DAAC) about one year after
launch. The DAAC Science Team will provide regular updates regarding
data product releases in the future.

Ancillary Keywords

Corrected Microwave Antenna Temperatures

Corrected Microwave Antenna Temperatures Uncertainties

Data Set Progress

IN WORK

Originating Center

GES DAAC

Data Center

Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Data Center URL: http://disc.gsfc.nasa.gov/

Data Center Personnel
Name: GES DISC HELP DESK SUPPORT GROUP Phone: 301-614-5224 Fax: 301-614-5268 Email: gsfc-help-disc at lists.nasa.gov Contact Address: Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA