Anisotropy, Abrupt Climate Change, and the Deep Ice in West Antarctica

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Unknown

Publication_Date: Unknown

Title: Anisotropy, Abrupt Climate Change, and the Deep Ice in West Antarctica

Description:

Abstract:

This record includes two datasets and accompanying code. The anisotropic flow dataset provides velocity and fabric evolution of anisotropic ice for several numerical experiments. The experiments examine how differing stress regimes and initial c-axis crystal fabrics can affect flow. Contained are VTU format files of finite element output of velocity (m/yr) as well as the second order fabric orientation tensor, in addition to the beginning fabric orientation tensor. VTU files are readable with the open-source ParaView package. Also included are python2 and Fortran 90 codes for computation of various fabric parameters, as well as to compute the time derivatives of the A and B fabric tensors for computation of the material derivative of the fabric evolution equation. The snow and firn anisotropy dataset includes snow and firn properties corresponding to several steady-state and time-varying climate histories representing different sites on the Antarctic continent. The model divides the firn pack into layers, each of which has an individual density, age, mass, temperature, grain size distribution, and grain orientation distribution. The record also includes the model's Matlab code, tested on Matlab versions 2007b and 2009a. The code can take advantage of parallel processors but does not require them.

Purpose:

Not Available

Supplemental_Information:

REFERENCE: Pettit, E.C., E.D. Waddington, W.D. Harrison, Throstur Thorsteinsson, D. Elsberg, J. Morack, M.A. Zumberge. "The crossover stress, anisotropy, and the flow law at Siple Dome, West Antarctica," Journal of Glaciology, v.57, 2011, p. 39.

Status:

Progress: In Work

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -165.0

East_Bounding_Coordinate: -105.0

North_Bounding_Coordinate: -75.0

South_Bounding_Coordinate: -85.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: GCMD PLATFORM

Theme_Keyword_Thesaurus: PROJECT

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS

Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > ABLATION ZONES/ACCUMULATION ZONES

Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS

Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SNOW/ICE

Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > SNOW/ICE TEMPERATURE

Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > FIRN

Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > SNOW STRATIGRAPHY

Theme_Keyword: COMPUTERS

Theme_Keyword: WAISDIVIDE > WEST ANTARCTIC ICE SHEET DIVIDE PROJECT

Theme_Keyword: Siple Dome

Theme_Keyword: Antarctica

Theme_Keyword: Wais

Theme_Keyword: Anisotropy

Theme_Keyword: Abrupt Climate Change

Theme_Keyword: Ice Core

Theme_Keyword: Accumulation Rate

Theme_Keyword: Vertical Velocity

Theme_Keyword: Ice Thickness

Theme_Keyword: Ice Temperature

Theme_Keyword: Firn

Theme_Keyword: Metamorphism

Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: CONTINENT > ANTARCTICA

Place_Keyword: GEOGRAPHIC REGION > POLAR

Access_Constraints: Not Available

Use_Constraints:

Not Available

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: NSIDC AGDC USER SERVICES

Contact_Position: TECHNICAL CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: National Snow and Ice Data Center

Address: CIRES, 449 UCB

Address: University of Colorado

City: Boulder

State_or_Province: CO

Postal_Code: 80309-0449

Country: USA

Contact_Voice_Telephone: +1 (303) 492-6199

Contact_Facsimile_Telephone: +1 (303) 492-2468

Contact_Electronic_Mail_Address: nsidc@nsidc.org

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Not Available

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NSIDC > National Snow and Ice Data Center

Contact_Person: NSIDC USER SERVICES

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: National Snow and Ice Data Center

Address: CIRES, 449 UCB

Address: University of Colorado

City: Boulder

State_or_Province: CO

Postal_Code: 80309-0449

Country: USA

Contact_Voice_Telephone: +1 (303) 492-6199

Contact_Facsimile_Telephone: +1 (303) 492-2468

Contact_Electronic_Mail_Address: nsidc@nsidc.org

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NSIDC_AGDC > NSIDC Antarctic Glaciological Data Center

Contact_Person: NSIDC AGDC USER SERVICES

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: National Snow and Ice Data Center

Address: CIRES, 449 UCB

Address: University of Colorado

City: Boulder

State_or_Province: CO

Postal_Code: 80309-0449

Country: USA

Contact_Voice_Telephone: +1 (303) 492-6199

Contact_Facsimile_Telephone: +1 (303) 492-2468

Contact_Electronic_Mail_Address: nsidc@nsidc.org

Resource_Description: waddington_0636996

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Not Available

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://nsidc.org

Access_Instructions:

DATA CENTER URL

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://nsidc.org/agdc/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.waisdivide.unh.edu/

Access_Instructions:

The U.S research community is conducting a deep ice coring project in West Antarctica for studies of climate, ice sheet history and cryobiology. This project is collecting a deep ice core from the West Antarctic Ice Sheet (WAIS) ice flow divide and integrating approximately 20 separate but synergistic projects to analyze the ice and interpret the records.

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date: 20120316

Metadata_Review_Date: 20120904

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GCMD User Support Office

Contact_Organization: NASA Global Change Master Directory

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Not Available

City: Lanham

State_or_Province: MD

Postal_Code: 20706

Country: USA

Contact_Voice_Telephone: Not Available

Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time