Millennially averaged accumulation rates for the Lake Vostok region

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Joseph A. MacGregor
Publication_Date: Unknown
Title: Millennially averaged accumulation rates for the Lake Vostok region
Edition:
Geospatial_Data_Presentation_Form:
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place:
Publisher:
Other_Citation_Details:
Online_Linkage:
Description:
Abstract:
The depths of radar-detected internal layers can be used to infer the spatial variability of accumulation rates. Here we infer accumulation rates from three radar layers (26, 35 and 41ka old) in the Vostok Subglacial Lake region using the local-layer approximation (LLA). The LLA assumes that the strain-rate history of a particle traveling through the ice sheet can be approximated by the vertical strain-rate profile at the current position of the particle, which we further assume is uniform. We use the LLA to map accumulation rates over a 150 km by 350 km area. The LLA accumulation-rate map shows higher values in the northwestern corner of our study area and lower values near the downstream shoreline of the lake. The LLA-inferred accumulation-rate patterns over the three time periods are all similar, suggesting that the regional pattern did not change significantly between the start of the Holocene and the last ~20 ka of the last Glacial Period. Accumulation rates and their spatio-temporal variability are important boundary conditions for ice-flow models.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: MacGregor, Joseph A., Kenichi Matsuoka, Michelle R. Koutnik, Edwin D. Waddington, Micheal Studinger and Dale P. Winebrenner 2009 Millennially averaged accumulation rates for the Vostok Subglacial Lake region inferred from deep internal layers Annals of Glaciology 50 51 International Glaciological Society 25-34
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 68.4102
East_Bounding_Coordinate: 80.5377
North_Bounding_Coordinate: -75.6688
South_Bounding_Coordinate: -79.0715
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
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 > ICE SHEETS
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > ABLATION ZONES/ACCUMULATION ZONES
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER FACIES
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER MASS BALANCE/ICE SHEET MASS BALANCE
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER MOTION/ICE SHEET MOTION
Theme_Keyword: DHC-6 > DEHAVILLAND TWIN OTTER
Theme_Keyword: RADAR ECHO SOUNDERS
Theme_Keyword: NSF/PLR > DIVISION OF POLAR PROGRAMS, NATIONAL SCIENCE FOUNDATION
Theme_Keyword: USAP > UNITED STATES ANTARCTIC PROGRAM
Theme_Keyword: Lake Vostok
Theme_Keyword: Accumulation Rate
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA > LAKE VOSTOK
Place_Keyword: GEOGRAPHIC REGION > POLAR
Temporal:
Temporal_Keyword_Thesaurus: GCMD
Temporal_Keyword: 26-41 Ka
Access_Constraints: N/A
Use_Constraints:
Please refer to MacGregor et al. (2009) when using this dataset.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: KENICHI MATSUOKA
Contact_Person_Primary:
Contact_Person: MICHAEL S. STUDINGER
Contact_Person_Primary:
Contact_Person: JOSEPH ANDREW MACGREGOR
Contact_Position: INVESTIGATOR
Contact_Position: INVESTIGATOR
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: University of Washington
Address: Department of Earth and Space Sciences
City: Seattle
State_or_Province: WA
Postal_Code: 98105
Country: USA
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Lamont-Doherty Earth Observatory
Address: 61 Route 9W
City: PALISADES
State_or_Province: NY
Postal_Code: 10964
Country: USA
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 10100 Burnet Rd, Bldg 196
City: Austin
State_or_Province: TX
Postal_Code: 78758
Country: USA
Contact_Voice_Telephone: 845 365 8598
Contact_Voice_Telephone: (512) 471-0411
Contact_Facsimile_Telephone: 845 365 8179
Contact_Facsimile_Telephone: (512) 471-8844
Contact_Electronic_Mail_Address: matsuoka@npolar.no
Contact_Electronic_Mail_Address: matsuoka@ess.washington.edu
Contact_Electronic_Mail_Address: mstuding@ldeo.columbia.edu
Contact_Electronic_Mail_Address: joemac@ig.utexas.edu
Back to Top
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Please refer to MacGregor et al. (2009) for details on the quality of this dataset and assumptions used to derive the accumulation rates presented.
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
Back to Top
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 1.5 km
Longitude_Resolution: 1.5 km
Geographic_Coordinate_Units: Decimal degrees
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: Not Available
Altitude_Resolution: N/A
Altitude_Distance_Units: Not Available
Altitude_Encoding_Method: Implicit coordinate
Depth_System_Definition:
Depth_Datum_Name: Not Available
Depth_Resolution: N/A
Depth_Distance_Units: Not Available
Depth_Encoding_Method: Implicit coordinate
Back to Top
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: UWA/ESS/GLACIOLOGY > Glaciology, Near-Surface Geophysics, Earth and Space Sciences, University of Washington
Contact_Person: JOSEPH ANDREW MACGREGOR
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 10100 Burnet Rd, Bldg 196
City: Austin
State_or_Province: TX
Postal_Code: 78758
Country: USA
Contact_Voice_Telephone: (512) 471-0411
Contact_Facsimile_Telephone: (512) 471-8844
Contact_Electronic_Mail_Address: joemac@ig.utexas.edu
Resource_Description: Vostok_accum
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII text
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.ess.washington.edu/Surface/Glaciology/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.nsf.gov/awardsearch/showAward.do?AwardN...
Access_Instructions:
NSF Award #0538674 Abstract
Fees: None
Back to Top
Metadata_Reference_Information:
Metadata_Date: 20110705
Metadata_Review_Date: 20110823
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
Back to Top
[ Update this Record ]


Link to Web Site