MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAREntry ID: NSIDC-0481
Abstract: This data set is part of the NASA Making Earth Science Data Records for Use in Research Environments (MEaSUREs) project. This data set provides maps of glacier outlet areas, some of which have shown profound velocity changes over the MEaSUREs observation period from 2000 to 2010. The data are provided in addition to the ice-sheet-wide data from the related data set, MEaSUREs Greenland Ice Sheet ... Velocity Map from InSAR Data (NSIDC-0478). The InSAR Selected Glacier Site Velocity Maps are produced from TerraSAR-X image pairs. At present this collection contains data for one glacier. Data are available via FTP, in 4-byte Institute of Electrical and Electronics Engineers (IEEE) floating point format and GeoTIFF (.tif) format. Note: These data are considered provisional pending a review by the MEaSUREs project. Once the data have been reviewed, this statement will be removed from this documentation.
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Data Set Citation
Dataset Originator/Creator: Joughin, I., B. Smith, I. Howat, T. Scambos.
Dataset Title: MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR
Dataset Release Date: 2011-05-19
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: National Snow and Ice Data Center (NSIDC)Online Resource: http://nsidc.org/data/nsidc-0481.html
Start Date: 2002-09-01Stop Date: 2013-02-28
Latitude Resolution: 50 km
Longitude Resolution: 50 km
Horizontal Resolution Range: 50 km - < 100 km or approximately .5 degree - < 1 degree
Temporal Resolution: Twice per day (daytime and nighttime)
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > TEMPERATURE PROFILES > AIR TEMPERATURE VERTICAL DISTRIBUTION
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR PROFILES > SPECIIFC HUMIDITY VERTICAL PROFILES
ATMOSPHERE > CLOUDS > CLOUD PROPERTIES > CLOUD TOP PRESSURE
ATMOSPHERE > CLOUDS > CLOUD PROPERTIES > CLOUD VERTICAL DISTRIBUTION
ISO Topic Category
Quality The L3Q products combine the Level 2 standard data parameters over grid cells of 5 x 5 deg spatial extent for temporal periods of five days and one month. The report for each grid cell provides a number of representative values and their associated weights. The sample of lower level data points with the same representative is called a “cluster”, and its representative is the “cluster mean”. ... Cluster membership is determined by assigning lower level data points to clusters so that that the errors between original values and their representatives are minimized. This constraint prevents the creation of single-data-point clusters.
As a general rule, Level 2 retrieved quantities whose quality indicators are “best” (=0) or “good” (=1) are included in the data that generate the L3Q product. Users MUST read information contained within the two documents below to avoid misuse of the L3Q products in their research.
Access Constraints Not publicly available at the moment.
Data Set Progress
Distribution Media: FTP
Distribution Size: 43 MB
Distribution Format: HDF-EOS
Role: DIF AUTHOR
Email: asghar.e.esfandiari at nasa.gov
Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center
Province or State: MD
Postal Code: 20771
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2007-05-29
Last DIF Revision Date: 2013-04-11