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The following data products at NSIDC are in the EASE-Grid projection. To access the documentation and data for a particular data set, click on the data set title.
The products are grouped into the following categories:
| Data Set Title | Summary |
|---|---|
| Near Real-Time SSM/I EASE-Grid Daily Global Ice Concentration and Snow Extent | The Near Real-Time SSM/I EASE-Grid Daily Global Ice Concentration and Snow Extent product (Near Real-Time Ice and Snow Extent, NISE) provides daily, global near real-time maps of sea ice concentrations and snow extent. The National Snow and Ice Data Center (NSIDC) creates the NISE product using passive microwave data from the Defense Meteorological Satellite Program (DMSP) F13 Special Sensor Microwave/Imager (SSM/I). |
| Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent | The Northern Hemisphere EASE-Grid Weekly Snow Cover and Sea Ice Extent Version 3 product and Version 3.1 update combine snow cover and sea ice extent at weekly intervals from 23 October 1978 through 24 June 2007, and snow cover alone from 3 October 1966 through 23 October 1978. (Sea ice data were not available prior to 23 October 1978.) |
| Global EASE-Grid 8-day Blended SSM/I and MODIS Snow Cover | This data set comprises global, 8-day snow-covered area (SCA) and snow water equivalent (SWE) data from 2000 through the most current processing. Global SWE data are derived from the Special Sensor Microwave Imager (SSM/I) and are enhanced with MODIS/Terra Snow Cover 8-Day Level 3 Global 0.05 degree Climate Modeling Grid (CMG) data. Global data are gridded to the Northern and Southern 25 km Equal-Area Scalable Earth Grids (EASE-Grids). |
| MODIS/Aqua Sea Ice Extent Daily L3 Global 1km EASE-Grid Day | MODIS/Aqua Sea Ice Extent Daily L3 Global 1km EASE-Grid Day (MYD29P1D) contains the following fields: sea ice by reflectance, sea ice by reflectance spatial quality assurance (QA), ice surface temperature (IST), IST spatial QA, sea ice by IST, and combined sea ice in HDF-EOS format along with corresponding metadata. Data are available from 04 July 2002 to present. |
| MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Day | MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Day (MOD29P1D) data set contains fields for Sea Ice by Reflectance, Sea Ice by Reflectance Spatial Quality Assessment (QA), Ice Surface Temperature (IST), and IST Spatial QA in Hierarchical Data Format-Earth Observing System (HDF-EOS) format, along with corresponding metadata. |
| MODIS/Aqua Sea Ice Extent Daily L3 Global 1km EASE-Grid Night | MODIS/Aqua Sea Ice Extent Daily L3 Global 1km EASE-Grid Night (MYD29P1N) data set, new for Version 5 (V005), contains fields for Ice Surface Temperature (IST) and IST Spatial Quality Assessment (QA) in Hierarchical Data Format-Earth Observing System (HDF-EOS) format along with corresponding metadata |
| MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Night | MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Night (MOD29P1N) contains the following fields: ice surface temperature (IST), IST spatial QA, and sea ice by IST in HDF-EOS format along with corresponding metadata.The sea ice algorithm uses a Normalized Difference Snow Index (NDSI) modified for sea ice to distinguish sea ice from open ocean based on reflective and thermal characteristics. |
| MODIS/Aqua Sea Ice Extent and IST Daily L3 Global 4km EASE-Grid Day | MODIS/Aqua Sea Ice Extent and IST Daily L3 Global 4km EASE-Grid Day (MYD29E1D) contains the following fields: sea ice by reflectance and ice surface temperature (IST). Each data granule covers the entire globe with two separate arrays of 4321 x 4321 pixels: one for the Arctic and one for the Antarctic. |
| MODIS/Terra Sea Ice Extent and IST Daily L3 Global 4km EASE-Grid Day | MODIS/Terra Sea Ice Extent and IST Daily L3 Global 4km EASE-Grid Day (MOD29E1D) contains the following fields: sea ice by reflectance and ice surface temperature (IST). Each data granule covers the entire globe with two separate arrays of 4321 x 4321 pixels: one for the Arctic and one for the Antarctic. |
| Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors | Daily ice motion vectors are computed from Advanced Very High Resolution Radiometer (AVHRR), Scanning Multichannel Microwave Radiometer (SMMR), Special Sensor Microwave/Imager (SSM/I), and International Arctic Buoy Programme (IABP) buoy data. |
| Sea Ice Charts of the Russian Arctic in Gridded Format, 1933-2006 | The Arctic and Antarctic Research Institute (AARI) in St. Petersburg, Russia, produces sea ice charts for safety of navigation in the polar regions and for other operational and scientific purposes. Arctic charts from 1933 through 2006 are collected in this data set. Chart frequency and spatial coverage varies, but charts were compiled every 10 days during the navigation season, and monthly for the rest of the year, over most of the series. |
| Arctic and Antarctic Research Institute (AARI) 10-Day Arctic Ocean EASE-Grid Sea Ice Observations | These gridded ice charts represent a reformatting of information contained in another data set, the Russian Arctic and Antarctic Research Institute's (AARI) 10 Day Digital Arctic Sea Ice Charts. AARI digitized Arctic sea ice concentration and stage of development charts as part of an international data exchange program. |
| Data Set Title | Summary |
|---|---|
| DMSP SSM/I Pathfinder Daily EASE-Grid Brightness Temperatures | The NOAA/NASA Pathfinder Program Special Sensor Microwave/Imager (SSM/I) Level 3 Equal-Area Scalable Earth-Grid (EASE-Grid) Brightness Temperatures consist of gridded data in one of three projections, Northern Hemisphere, Southern Hemisphere and full global. The data gridding technique maximizes the radiometric integrity of the original brightness temperature values, maintains high spatial and temporal precision, and involves no averaging of original swath data. |
| Near Real-Time DMSP SSM/I Pathfinder Daily EASE-Grid Brightness Temperatures | This data set provides daily, near real-time Special Sensor Microwave/Imager (SSM/I) brightness temperatures in the 25 km Equal-Area Scalable Earth-Grid (EASE-Grid). The data set consists of gridded data in two projections: Northern Hemisphere and Southern Hemisphere. |
| Nimbus-7 SMMR Pathfinder Daily EASE-Grid Brightness Temperatures | This data set consists of brightness temperatures (TBs) acquired from the Scanning Multichannel Microwave Radiometer (SMMR) on board the Nimbus-7 Pathfinder satellite. The TBs have been gridded onto the Equal-Area Scalable Earth Grid (EASE-Grid) and are presented in three different projections: Northern Hemisphere, Southern Hemisphere, and global. |
| AMSR-E/Aqua Daily EASE-Grid Brightness Temperatures | The Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) instrument on the NASA EOS Aqua satellite provides global passive microwave measurements of the Earth. NSIDC produces AMSR-E gridded brightness temperature data by interpolating AMSR-E data (6.9 GHz, 10.7 GHz, 18.7 GHz, 23.8 GHz, 36.5 GHz, and 89.0 GHz) to the output grids from swath space using an inverse-distance squared method. |
| Data Set Title | Summary |
|---|---|
| AMSR-E/Aqua Daily L3 Global Snow Water Equivalent EASE-Grids | The Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) instrument on the NASA Earth Observing System (EOS) Aqua satellite provides global passive microwave measurements of terrestrial, oceanic, and atmospheric variables for the investigation of water and energy cycles. |
| AMSR-E/Aqua 5-Day L3 Global Snow Water Equivalent EASE-Grids | These Level-3 Snow Water Equivalent (SWE) data sets contain SWE data and quality assurance flags mapped to Northern and Southern Hemisphere 25 km Equal-Area Scalable Earth Grids (EASE-Grids). |
| Global Monthly EASE-Grid Snow Water Equivalent Climatology | This data set comprises global, monthly satellite-derived snow water equivalent (SWE) climatologies from November 1978 through June 2003, with periodic updates released as resources permit. Global data are gridded to the Northern and Southern 25 km Equal-Area Scalable Earth Grids (EASE-Grids). |
| Data Set Title | Summary |
|---|---|
| AVHRR Polar Pathfinder Twice-Daily 1.25 km EASE-Grid Composites | The AVHRR Polar Pathfinder Twice-Daily 1.25 km EASE-Grid Composites are a collection of products for both poles, consisting of twice-daily gridded and calibrated satellite channel data and derived parameters. Data include five Advanced Very High Resolution Radiometer (AVHRR) channels, clear sky surface broadband albedo and skin temperature, solar zenith angle, satellite elevation angle, sun-satellite relative azimuth angle, surface type mask, cloud mask, orbit mask, time of acquisition, and ice motion vectors. |
| AVHRR Polar Pathfinder Twice-Daily 5 km EASE-Grid Composites | The Advanced Very High Resolution Radiometer (AVHRR) Polar Pathfinder Twice-Daily 5 km EASE-Grid Composites are a collection of products for both poles, consisting of twice-daily calibrated and gridded satellite channel data and derived parameters. Data include five AVHRR channels, clear sky surface broadband albedo and skin temperature, solar zenith angle, satellite elevation angle, sun-satellite relative azimuth angle, surface type mask, cloud mask, and Universal Coordinated Time (UTC) of acquisition. |
| AVHRR Polar Pathfinder Twice-Daily 25 km EASE-Grid Composites | The AVHRR Polar Pathfinder Twice-Daily 25 km EASE-Grid Composites are a collection of products for both poles, consisting of twice-daily gridded and calibrated satellite channel data and derived parameters. Data include five Advanced Very High Resolution Radiometer (AVHRR) channels, clear sky surface broadband albedo and skin temperature, average albedo and temperature, valid fraction file, solar zenith angle, satellite elevation angle, sun-satellite relative azimuth angle, surface type mask, cloud mask, cloud fraction files, and Universal Coordinated Time (UTC) of acquisition. |
| Data Set Title | Summary |
|---|---|
| Circum-Arctic Map of Permafrost and Ground-Ice Conditions | The circumpolar permafrost and ground ice data contribute to a unified international data set that depicts the distribution and properties of permafrost and ground ice in the Northern Hemisphere (20°N to 90°N). The re-gridded data set shows discontinuous, sporadic, or isolated permafrost boundaries. |
| Maps of Geocryological Regions and Classifications in China | This data set includes digital versions of 'The Map of Geocryological Regionalization and Classification in China' from Geocryology in China by Y. Zhou, D. Guo, G. Qiu, G. Cheng, and S. Li. Included are ESRI Shapefiles of meteorological stations, permafrost regions, and classification of frozen ground, and binary arrays of 25 km EASE-Gridded permafrost regions and classifications. |
| Map of Natural (Landscape) and Permafrost Zones and the Net of Soil Temperature Meteorological Stations in Russia and Middle Asian Mountains | This data set is a vector coverage of the Map of Natural Landscape and Permafrost Zones and the Net of Soil Temperature Meteorological Stations in Russia and Middle Asian Mountains (scale 1:4000000), published by the Russian Academy of Sciences Earth Cryosphere Institute and Institute for Phytochemical and Biological Problems in Earth Science. |
| Arctic Soil Freeze/Thaw Status from SSM/I | This data set contains near-surface (< 5 cm) soil freeze/thaw status on snow-free and snow-covered land surfaces over the Arctic terrestrial drainage basin. The near-surface soil freeze/thaw status is determined by using passive-microwave remote sensing data over snow-free land and a numerical model over snow-covered land. |
| Data Set Title | Summary |
|---|---|
| AMSR-E/Aqua Daily L3 Surface Soil Moisture, Interpretive Parms, & QC EASE-Grids | The Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) instrument on the NASA Earth Observing System (EOS) Aqua satellite provides global passive microwave measurements of terrestrial, oceanic, and atmospheric variables for the investigation of water and energy cycles. Soil moisture and other land surface variables are key variables in understanding land surface hydrology and in modeling ecosystems, weather, and climate. |
| TOVS Pathfinder Path-P Daily Arctic Gridded Atmospheric Parameters | The TIROS-N Operational Vertical Sounder (TOVS) Polar Pathfinder (Path-P) consists of gridded daily and monthly Arctic atmospheric data derived from various NOAA satellites. TOVS Path-P daily files are available for Northern and Southern Hemispheres (from 60° poleward) at 100 km gridded spatial resolution in an Equal-Area Scalable Earth Grid (EASE-Grid). |
| Polar Pathfinder Sampler: Combined AVHRR, SMMR-SSM/I, and TOVS Time Series and Full-Resolution Samples | The AVHRR, SMMR-SSM/I and TOVS Polar Pathfinder research teams collaborated to make it as easy as possible to use Polar Pathfinder data sets together by employing a common projection, namely the NSIDC Equal-Area Scalable Earth-Grid (EASE-Grid), and validation methods to develop consistently processed data sets that are easy to combine, compare and contrast. This CD-ROM includes sample data, time-series visualizations, and browse products, for temporal and spatial subsets of the AVHRR, SMMR-SSM/I and TOVS data sets, to illustrate the types of products available for the various data sets. |
Ancillary data are provided on the Ancillary Data Web page. These data sets were derived from external data sources and then gridded to the EASE-Grid. These data sets help to answer questions like what percentage of the EASE-Grid pixels are a particular type of land cover classification and what is the average elevation at each EASE-Grid pixel.
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Supporting Cryospheric Research Since 1976 |
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