Temporal coverage varies by sensor. Gridded data are available from November 1978 through March 2003.
Temporal Resolution:
Mean gridded fields include yearly, monthly, and weekly means, and a mean for the entire time series.
Spatial Coverage:
Spatial coverage extends from 48.4°N to 90°N, and from 53.2°S to 90°S. Actual coverage extends beyond these limits in the grid corners.
Spatial Resolution:
25 km
Data Format:
Daily and mean gridded fields are in 2-byte integer format. Browse images of mean fields are available in Portable Network Graphics (PNG) and Enhanced Postscript (EPS) format. Raw ice motion vectors are in tab-delimited ASCII text format.
Daily and mean ice motion grids combine data from AVHRR, SMMR, SSM/I, and drifting buoys.
November 1978 through present (current month minus
one)
Temporal Resolution:
Monthly
Spatial Coverage:
Northern and Southern Hemispheres
Spatial Resolution:
25 km
Data Format:
PNG image files
The images in the Sea Ice Index data set depict average ice
conditions, estimated using satellite passive microwave data
for the most recent month available, as well as snapshots of
trends and anomalies that compare these recent conditions with
the mean for the month.
Users can compare extent, concentration, anomalies, trends,
and total extent maps.
Trend and anomaly images are available as single images.
Images
are available in both tabular form, for quick month-over-month
and year-over-year comparisons.
A more extensive directory of
archive images are available for download via FTP.
NASA team sea ice algorithm, Advanced Horizontal Range Algorithm for identifying snow melt
Source:
SMMR, SSM/I
Projection:
Polar stereographic
Temporal Coverage:
1979 through 1998
Temporal Resolution:
Yearly
Spatial Coverage:
Data cover the Northern Hemisphere, except for circular sectors centered over the pole.
Spatial Resolution:
25 km
Data Format:
ASCII, GIF
Snow melt onset is defined as the point in time when microwave brightness temperatures increase sharply due to the presence of liquid water in the snowpack.
Several value-added products derived from these data (e.g., mean melt onset date, range of melt onset dates) are also available.
Pixels over land, coastline, and open ocean are distinguished.
Airborne Polarimetric Scanning Radiometers (PSR/A and PSR/C), a Scanning Low-Frequency Microwave Radiometer (SLFMR), and an infrared scanner boresighted to each PSR
Projection:
N/A
Temporal Coverage:
26 June 2000 to 05 July 2000
Temporal Resolution:
N/A
Spatial Coverage:
Baffin Bay and Canadian Arctic; all measurements fall within 68.967°N - 76.422°N, 63.197°W - 105.022°E
Spatial Resolution:
Spatial resolution varies from 0.13 km to 3.6 km, depending on the sensor.
Data Format:
Data are provided as MATLAB files. MATLAB version 5.3 or greater is required to view these data.
The Meltpond2000 project was the first in a series of Arctic and Antarctic aircraft campaigns to validate sea ice algorithms developed for the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E), primarily to quantify errors in AMSR-E sea ice products resulting from the presence of melt ponds. The objective was to compare sea ice concentrations derived from AMSR-E algorithms but using Defense Meteorological Satellite Program (DMSP) Special Sensor Microwave/Imager (SSM/I) radiances, with coincident observations from aircraft sensors and high-resolution satellite imagery.
Passive Microwave