MEaSUREs: Small-Scale Kinematics of Arctic Ocean Sea Ice

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: MEaSUREs: Small-Scale Kinematics of Arctic Ocean Sea Ice
Description:
Abstract:
This data set of the Arctic Ocean sea ice cover is derived from radar imagery. The data products were produced by the RADARSAT Geophysical Processing System (RGPS), a project supported by the NASA MEaSUREs program. The 4 types of products are: ice motion, ice deformation, ice age and thickness, and radar backscatter. The primary data source for the analysis is the Synthetic Aperture Radar (SAR) on RADARSAT-1, a Canadian polar-orbiting satellite that provided data coverage from October 1996 through May 2008. Each product contains monthly measurements of ice motion and derived parameters over the Arctic Ocean sea ice cover. The analysis involves laying a 10km by 10km grid over a set of RADARSAT orbits covering the sea ice cover during an initial 3-day period of a season. The grid points are then tracked over each ensuing 3-day time period throughout the season. The changes in the cells defined by the grid points are used to characterize the evolution of the ice within each cell. We produce these measurements for two seasons: 1) winter usually covers November through mid-May, and 2) summer covers mid-May into mid-August. The 4 data products resulting from these measurements are: 1) Ice Motion – a record of the time and location of each point within the initial grid as tracked on RADARSAT images at approximate 3-day intervals. Note that a very small fraction of the points may be lost during the season through advection out of the Arctic basin, loss of ice, or untrackability of the ice cover. 2) Deformation – a record of the divergence, vorticity and shear occurring within each cell. As the verticies of each cell move within a time step, the kinematic properties can be calculated to characterize the response of the ice cover to stresses induced by wind and ocean currents. 3) Ice Age and Thickness – a record of the area, age and thickness of new ice and ridged ice that result from cell area changes. A spatial and temporal distribution of these ice areas is kept for each cell. If the area of a cell increases within a time step, an area of new ice is created. The ice thickness within all the new ice areas created during the season is increased using air temperature information. When the cell area decreases, the thinnest ice areas are rafted or ridged, depending on their thickness. The thickness of areas of ridged ice are also grown in time. 4) Backscatter – a record of the radiometric properties of the ice within each cell. A histogram of the radar brightness is kept within each cell at each time step, allowing the user to deduce multi-year ice fractions of the ice cover.
Purpose:
Not Available
Supplemental_Information:
Not Available
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19961001
Ending_Date: 20080531
Currentness_Reference:Unknown
Status:
Progress: In Work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -180.0
East_Bounding_Coordinate: 180.0
North_Bounding_Coordinate: 90.0
South_Bounding_Coordinate: 65.0
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: ISO TOPIC CATEGORY
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE DEFORMATION
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE DEPTH/THICKNESS
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE TYPES
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > LEADS
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > SEA ICE AGE
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > SEA ICE MOTION
Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > ICE DEFORMATION
Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > ICE DEPTH/THICKNESS
Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > ICE TYPES
Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > LEADS
Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > SEA ICE AGE
Theme_Keyword: EARTH SCIENCE > OCEANS > SEA ICE > SEA ICE MOTION
Theme_Keyword: RADARSAT-1
Theme_Keyword: SAR > SYNTHETIC APERTURE RADAR
Theme_Keyword: MEASURES > MAKING EARTH SCIENCE DATA RECORDS FOR USE IN RESEARCH ENVIRONMENTS
Theme_Keyword: OCEANS
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: OCEAN > ARCTIC OCEAN
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: Not Available
Use_Constraints:
Not Available
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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
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NASA/JPL/SEA-ICE > Cryosphere, Jet Propulsion Laboratory, NASA
Contact_Person: RON KWOK
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 4800 Oak Grove Dr M/S: 300-331
City: Pasadena
State_or_Province: CA
Postal_Code: 91109
Country: United States
Contact_Voice_Telephone: (818) 354-5614
Contact_Facsimile_Telephone: (818) 393-3077
Contact_Electronic_Mail_Address: ron.kwok@jpl.nasa.gov
Resource_Description: JPL-RGPS-0001
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://scienceandtechnology.jpl.nasa.gov/newsandev...
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://rkwok.jpl.nasa.gov/radarsat/lagrangian.html...
Access_Instructions:
MEaSUREs: Small-Scale Kinematics of Arctic Ocean Sea Ice website
Fees: Not Available
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Metadata_Reference_Information:
Metadata_Date: 20100811
Metadata_Review_Date: 20101027
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
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