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Time Dependent Topography Through the Glacial Cycle

Metadata also available as - [Questions & Answers] - [Parseable text] - [DIF]

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

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: <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: cc21000
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

Theme:

Theme_Keyword_Thesaurus: National Geologic Map Database Catalog themes, augmented
Theme_Keyword: 0100 - Oceanography
Theme_Keyword: 2600 - Topography
Theme_Keyword: 2602 - Digital Elevation Model

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0
Place_Keyword: LD10 = North America
Place_Keyword: LD20 = Central America
Place_Keyword: LD30 = South America
Place_Keyword: LD40 = Europe
Place_Keyword: LD50 = Africa
Place_Keyword: LD60 = Australia and New Zealand
Place_Keyword: AY = Antarctica
Place_Keyword: LD70 = Asia
Place_Keyword: LD80 = Asia Minor and Middle East
Place_Keyword: LD90 = Southeast Asia
Place_Keyword: OC10 = Arctic
Place_Keyword: OC20 = Atlantic
Place_Keyword: OC30 = Indian
Place_Keyword: OC40 = Pacific
Place_Keyword: OC50 = Southern

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

Detailed_Description:

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_Domain_Values:

Range_Domain:

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: