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Analysis of East Antarctic drainage basins with altimetric, interferometric, gravity and GPS techniques to determine their state of flux

Entry ID: ASAC_2788

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Summary

Abstract: Metadata record for data from ASAC Project 2788

See the link below for public details on this project.

Public
This project will reassess the mass balance of Law Dome and a large sector of the Antarctic ice sheet south of Casey by exploiting the time history of change that can be obtained by resurveying historical surface elevation and gravity networks, started in the 1960s. The changes in ...

Related URL

Link: GET DATA

Description: Download point for the data

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: -66.0

S: -67.0

E: 111.0

W: 110.0

Temporal Coverage

Start Date: 2007-10-01

Stop Date: 2009-03-31

Location Keywords

CONTINENT > ANTARCTICA

GEOGRAPHIC REGION > ARCTIC

GEOGRAPHIC REGION > POLAR

Science Keywords

CRYOSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS

LAND SURFACE > TOPOGRAPHY > CONTOURS

ISO Topic Category

IMAGERY/BASE MAPS/EARTH COVER

Platform

GPS > Global Positioning System Satellites

Instrument

GPS > Global Positioning System

GPS RECEIVERS

Quality The Dates provided in temporal coverage are approximate only, and represent the beginning and end of the 2007 - 2009 Antarctic seasons.
The latitudes and longitudes provided in spatial coverage are approximate only.

2007-2008 Season:
Objective 1 - all available gravity data over a 40yr period has been verified, checked, calibrated and adjusted so that we have the most ... complete reduced gravity dataset for the Law Dome area. All available GPS data has been reduced from that data collected during 2004-05 field season. All available GPS data collected during 2004-05 field season has been reduced. A significant portion of the GPS data has been validated and inter compared using different reduction techniques in order to understand errors particularly in L1 pseudo range data.
This objective is now some 70% complete. The remaining work refers to the deep south lines, generally south of 70 degrees south. The gravity data have been adjusted but not yet navigated for precise position, that is, assigned WGS84 coordinates. The data entry from paper records is the current hurdle.

Objective 2 - A re-occupation of earlier survey control lines was done using GPS in season 2004-05(limited by logistical support), attempts to get back into the field in later seasons have not been possible (priority to the aircraft/runway). Attempts were made in season 07-08 to revisit some of our GPS sites to located and extend poles to save the value of the science for future seasons. This was not possible and/or not successful so if we do future work, the surveys will have to start again as past information is lost. This objective has not been possible due to the lack of field support after the first season. We are now fearful of losing all scientific value from the 2004-2005 data as the deep holes placed to determine horizontal/vertical change are now buried and are likely never to be recovered as the precision of real time location is about 2 meters and their depth will be in excess of 2 meters. The possible exception for recovery may be the 100m borehole placed by the ice core group for us
Objective 3 - a paper has been submitted to the Australian Journal of Earth Sciences (Bailey, Morgan, Lackie) and is currently in review. This paper has now been rejected, principally due to GPS positioning results which were deemed to be too good to be true. We are seeking an alternative journal.

See documentation within the download file for further information.

Access Constraints These data are publicly available for download from the provided URL.

Use Constraints This data set conforms to the PICCCBY Attribution License
(http://creativecommons.org/licenses/by/3.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_2788 when using these data.

Ancillary Keywords

GPS

drainage basins

Data Set Progress

COMPLETE

Data Center

Australian Antarctic Data Centre, Australia

Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC Phone: +61 3 6232 3244 Fax: +61 3 6232 3351 Email: metadata at aad.gov.au Contact Address: Australian Antarctic Division 203 Channel Highway City: Kingston Province or State: Tasmania Postal Code: 7050 Country: Australia

Distribution

Fees: none

Personnel

DVBID

Role: TECHNICAL CONTACT

Phone: (970) 221-6400

Email: dvbid at cdc.gov

Contact Address:

Division of Vector-Borne Infectious Diseases

Centers for Disease Control and Prevention

P.O. Box 2087

City: Fort Collins

Province or State: Colorado

Postal Code: 80522

Country: USA

TYLER B. STEVENS

Role: DIF AUTHOR

Phone: (301) 614-6898

Fax: 301-614-5268

Email: Tyler.B.Stevens at nasa.gov

Contact Address:

NASA Goddard Space Flight Center

Global Change Master Directory

City: Greenbelt

Province or State: MD

Postal Code: 20771

Country: USA

Creation and Review Dates

DIF Creation Date: 2002-12-30

Last DIF Revision Date: 2007-03-06

Future DIF Review Date: 2003-12-30

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