Time Dependent Topography Through the Glacial Cycle

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Peltier, W.R.
Publication_Date: 1993
Title: Time Dependent Topography Through the Glacial Cycle
Series_Information:
Series_Name: IGBP PAGES/World Data Center-A for Paleoclimatology Data Contribution Series
Issue_Identification: 93-015
Publication_Information:
Publication_Place: Boulder CO, USA.
Publisher: NOAA/NGDC Paleoclimatology Program
Online_Linkage: <URL:ftp://ftp.ngdc.noaa.gov/paleo/ice_topo/>
Description:
Abstract:
This data set consists of the results of the model ICE-4G, topography and ice cover data files.

Data consist of topographical heights at 1 Kyr intervals since the last glacial maximum and ice-cover data at 1 Kyr intervals since the last glacial maximum.

Topography is specified in metres. However in order to present a dataset in positive integer format, 10000 has been added. i.e if the data in this dataset is called itopog then true_topog = itopog - 10000 true_topog has values within the range [-9300,7200] metres.

The data are presented on a 1 degree latitude by 1 degree longitude grid. Data starting at (-179.5,+89.5), 180 rows of 360 points along a line of constant latitude.

Purpose: Presentation of results of model ICE4G.
Supplemental_Information:
In some areas, the ice-cover data indicates that there is ice while the topographic height is negative indicating that the region is below sealevel. In these cases, it should be assumed that the area is ice-covered. Either the region is not inundated or the ice is floating.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: cc19000
Ending_Date: present
Currentness_Reference: ground condition; data are given in 1000-year steps from 21ka to present
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -180.0
East_Bounding_Coordinate: 180.0
North_Bounding_Coordinate: 90.0
South_Bounding_Coordinate: -90.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Topography
Theme_Keyword: sea-ice
Theme_Keyword: land ice
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Global
Stratum:
Stratum_Keyword_Thesaurus: None
Stratum_Keyword: Holocene
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peltier, W.R.
Contact_Organization: Department of Physics, University of Toronto
Contact_Address:
Address_Type: mailing address
Address:
Department of Physics
University of Toronto
City: Toronto
State_or_Province: ON
Postal_Code:
Country: Canada
Contact_Voice_Telephone: unavailable
Native_Data_Set_Environment: SGI
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: See source information
Logical_Consistency_Report: See source information
Completeness_Report: See source information
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: see source information
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Peltier, W.R.
Publication_Date: 1994
Title: Ice age paleotopography
Series_Information:
Series_Name: Science
Issue_Identification: v. 265, pp. 195-201
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1994
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: Peltier, 1994
Source_Contribution: This published paper describes the mathematical model used to create the data set.
Process_Step:
Process_Description: Compilation of data set is described in Peltier, 1994.
Source_Used_Citation_Abbreviation: Peltier, 1994
Process_Date: 1993
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 180
Column_Count: 360
Vertical_Count: 22
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 1
Longitude_Resolution: 1
Geographic_Coordinate_Units: Decimal degrees
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Topography grid cell
Entity_Type_Definition: 16-bit value at even offsets in topography files
Entity_Type_Definition_Source: Peltier, 1994
Attribute:
Attribute_Label: Topography grid cell value
Attribute_Definition: Topographical heights at 1 Kyr intervals since the last glacial maximum, plus 10000
Attribute_Definition_Source: Peltier, 1994
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 700
Range_Domain_Maximum: 17200
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 1
Entity_Type:
Entity_Type_Label: Ice cover grid cell
Entity_Type_Definition: 16-bit value at even offsets in ice cover files
Entity_Type_Definition_Source: Peltier, 1994
Attribute:
Attribute_Label: Ice cover grid cell value
Attribute_Definition: Overall presence of ice in the grid cell
Attribute_Definition_Source: Peltier, 1994
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 0
Enumerated_Domain_Value_Definition: Grid cell not ice-covered
Enumerated_Domain_Value_Definition_Source: Peltier, 1994
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition: Grid cell is ice-covered
Enumerated_Domain_Value_Definition_Source: Peltier, 1994
Attribute_Units_of_Measure: logical
Attribute_Measurement_Resolution: 1
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: National Geophysical Data Center
Contact_Person: Bruce Bauer
Contact_Address:
Address_Type: mailing address
Address: 325 Broadway E/GCx3
City: Boulder
State_or_Province: CO
Postal_Code: 80303
Country: USA
Contact_Voice_Telephone: 303-497-6280
Contact_Facsimile_Telephone: 303-497-6513
Contact_Electronic_Mail_Address: bab@ngdc.noaa.gov
Resource_Description: paleo/ice_topo
Distribution_Liability: unknown
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: BIL
Format_Specification: 16 bit binary unsigned integers, least significant byte first
Format_Version_Number: 0
Format_Information_Content: The data files are at 1,000 year intervals, for example Top18.asc is the 18,000YBP Topography data file.
Transfer_Size: 3MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <URL:ftp://ftp.ngdc.noaa.gov/paleo/ice_topo/ice.tar>
Network_Resource_Name: <URL:ftp://ftp.ngdc.noaa.gov/paleo/ice_topo/top.tar>
Network_Resource_Name: <URL:ftp://ftp.ngdc.noaa.gov/paleo/ice_topo/ice_topography.readme>
Fees: none
Metadata_Reference_Information:
Metadata_Date: 19961025
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter N. Schweitzer
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address:
Mail Stop 906, National Center
12201 Sunrise Valley Drive
City: Reston
State_or_Province: VA
Postal_Code: 20192
Contact_Voice_Telephone: 703-648-6533
Contact_Facsimile_Telephone: 703-648-6647
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov
Metadata_Standard_Name: Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: 19940608
Generated by mp on Fri Oct 25 16:43:04 1996