Notice: If you are having difficulties subsetting SNODAS data via Polaris, please contact nsidc@nsidc.org.
This data set contains output from the NOAA National Weather Service's National Operational Hydrologic Remote Sensing Center (NOHRSC) SNOw Data Assimilation System (SNODAS). SNODAS is a modeling and data assimilation system developed by NOHRSC to provide the best possible estimates of snow cover and associated parameters to support hydrologic modeling and analysis. The aim of SNODAS is to provide a physically consistent framework to integrate snow data from satellite, airborne platforms, and ground stations with model estimates of snow cover (Carroll et al. 2001). SNODAS includes procedures to ingest and downscale output from the Numerical Weather Prediction (NWP) models, and to simulate snowcover using a physically based, spatially-distributed energy- and mass-balance snow model. SNODAS also includes procedures to assimilate satellite-derived, airborne, and ground-based observations of snow covered area and Snow Water Equivalent (SWE). These data are not suitable for snow fall events or totals for specific regions. For snow fall data, please see the state climatology reports for a particular state. These are gridded data sets for the continental United States at 1 km spatial resolution and 24 hour temporal resolution. Data are stored in flat binary 16-bit signed integer big-endian format with header and metadata files, and are available from 1 October 2003 to present via FTP." description_attribution: ~ doi: 10.7265/N5TB14TC end_time: 2015-08-18T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02158.yaml identifier: nsidc-g02158 lat_max: 52.8754 lat_min: 24.9504 lon_max: -66.9421 lon_min: -124.7337 name: Snow Data Assimilation System (SNODAS) Data Products at NSIDC native_id: G02158 processing_level: ~ publication_year: ~ release_dt: 2004-03-29T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 2003-09-28T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02158 url: http://nsidc.org/data/G02158 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'Visible band imagery from high-resolution satellites were acquired over four Arctic Ocean sites (three in 1999) during the summers of 1999, 2000, and 2001. The sites were within the median extent of the perennial ice pack. Imagery was analyzed using supervised maximum likelihood classification to derive either two (water and ice) or three (pond, open water, and ice) surface classes. Clouds were masked by hand. The data set consists of tables of pond coverage and size statistics for 500 m square cells within 10 km square images (image resolution is 1 meter), along with the surface type maps called Image Derived Products (IDPs) from which the pond statistics were derived. A total of 101 images over the three summers and four sites were used for pond statistics, out of a total of 1056 images acquired. The images are irregularly spaced in time. Data are stored in Microsoft Excel format and ASCII text, image files are stored as GeoTIFF binary images, browse images in PNG, and JPG image files, and are available from August 1999 and generally for May into September for 2000 and 2001 via FTP.' description_attribution: http://nsidc.org/data/g02180.html doi: 10.7265/N5PK0D32 end_time: 2001-09-30T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02159.yaml identifier: nsidc-g02159 lat_max: 90 lat_min: 73 lon_max: 180 lon_min: -180 name: 'Arctic Sea Ice Melt Pond Statistics and Maps, 1999-2001' native_id: G02159 processing_level: ~ publication_year: ~ release_dt: 2008-08-18T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1999-08-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02159 url: http://nsidc.org/data/G02159 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'This data set contains precipitation data originally recorded in log books at 65 coastal and island meteorological stations, and later digitized at the Arctic and Antarctic Research Institute (AARI), St. Petersburg, Russia, under the direction of Vladimir Radionov. Records from most stations begin in 1940. Instrumentation was generally a rain gauge with Nipher shield until the early 1950s (for most stations), when the Tretyakov precipitation gauge replaced earlier instrumentation. Data have not been adjusted for gauge type or wind bias. Observers corrected the data from 1967-1990 for wetting loss as they recorded the station data.' description_attribution: http://nsidc.org/data/g01938.html doi: 10.7265/N5JS9NCS end_time: 1990-12-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02164.yaml identifier: nsidc-g02164 lat_max: 84.78 lat_min: 64.41 lon_max: 170.16 lon_min: 36.76 name: 'Daily Precipitation Sums at Coastal and Island Russian Arctic Stations, 1940-1990' native_id: G02164 processing_level: ~ publication_year: ~ release_dt: 2004-12-22T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1940-01-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02164 url: http://nsidc.org/data/G02164 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'The National Snow and Ice Data Center hosts a time-series data set comprising annual snow cover data for the Northern Hemisphere (covering land primarily over 45 degrees North) from 1972 to 2000. Data are presented for land areas that exhibited snow cover in each of the 29 years. Variables are the week of snow disappearance, the week of snow cover onset, and the duration of the snow-free period. These variables were derived from operational NOAA weekly snow cover charts that have been quality controlled by the Rutgers University Global Snow Lab. For each year of the 29-year period, there are three binary files with data in an 89 x 89 cell grid. The week of the first detected snow cover in the fall is included in the WFS file, the week of the last observed snow cover in the spring is given in the WLS file, and the duration of snow-free period in weeks is given in the DSF file. Data are also provided in ASCII format summary files. In addition, summary statistics for each parameter are provided. These are grids of the mean and the standard deviation for the three parameters. Gridded latitude and longitude files are also included with this data set.' description_attribution: http://nsidc.org/data/nsidc-0046.html doi: 10.7265/N5F18WNC end_time: 2000-12-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02168.yaml identifier: nsidc-g02168 lat_max: 90 lat_min: 0 lon_max: 180 lon_min: -180 name: 'Timing and Statistics of Autumn and Spring Annual Snow Cover for the Northern Hemisphere, 1972 to 2000' native_id: G02168 processing_level: ~ publication_year: ~ release_dt: 2005-12-21T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1972-01-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02168 url: http://nsidc.org/data/G02168 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'This product contains ice edge coordinates for the Nordic Seas from 1750 through 2002 for months March through August. Ice edge in this product is defined as the outer boundary of ice having at least 30% ice concentration. Data are derived from publicly available sea ice products and use observational data from ship logbooks, diaries and other sources in addition to more recent satellite data products from the Scanning Multichannel Microwave Radiometer (SMMR) and the Special Sensor Microwave Imager (SSM/I). The data are distributed via FTP in ASCII, JPEG, and shapefile format.' description_attribution: http://nsidc.org/data/g01962.html doi: 10.7265/N59884X1 end_time: 2002-12-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02169.yaml identifier: nsidc-g02169 lat_max: 86 lat_min: 57.7 lon_max: 64.2 lon_min: -36.2 name: 'March through August Ice Edge Positions in the Nordic Seas, 1750-2002' native_id: G02169 processing_level: ~ publication_year: ~ release_dt: 2007-01-01T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1750-01-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02169 url: http://nsidc.org/data/G02169 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'This data set contains monthly mean precipitation sums from Russian arctic stations. Precipitation measurements were acquired using a Tretyakov precipitation gauge. Data have not been adjusted for wind bias. Data from 1967 and later are corrected for wetting loss (this correction was made by observers as they recorded the station data). Precipitation measurements from 216 stations are available. An analysis of existing precipitation data sets confirmed that data from these stations are not, at the time of publication, available in other commonly used precipitation data sets. Most data records begin in 1966 and end in 1990. The data are in tab-delimited ASCII format and available via FTP.' description_attribution: http://nsidc.org/data/g02164.html doi: 10.7265/N55H7D6Q end_time: 1990-12-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02170.yaml identifier: nsidc-g02170 lat_max: 69.77 lat_min: 50.17 lon_max: 164.17 lon_min: 38.25 name: 'Monthly Mean Precipitation Sums at Russian Arctic Stations, 1966-1990' native_id: G02170 processing_level: ~ publication_year: ~ release_dt: 2006-08-29T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1966-01-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02170 url: http://nsidc.org/data/G02170 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'The Canadian Ice Service (CIS) produces digital Arctic regional sea ice charts for marine navigation, climate research, and input to the Global Digital Sea Ice Data Bank (GDSIDB). The ice charts are created through the manual analysis of in situ, satellite, and aerial reconnaissance data. The ice charts have information on ice concentration, stage of development, and ice form, following World Meteorological Organization terminology. These sea ice charts begin in 2006 and cover the following regions of the Canadian Arctic: Northern Canadian waters (Western Arctic, Eastern Arctic, and Hudson Bay) and Southern Canadian waters (Great Lakes and East Coast). Each regional shapefile (.shp) (encoded in SIGRID-3 format) and associated metadata file (.xml) are combined into a tar archive file (.tar) for distribution. All data are available via FTP.' description_attribution: http://nsidc.org/data/g00799.html doi: 10.7265/N51V5BW9 end_time: ~ href: http://52.38.26.42:8080/dataset/nsidc-g02171.yaml identifier: nsidc-g02171 lat_max: 83.19372 lat_min: 39.52777 lon_max: 21.96925 lon_min: -164.05002 name: Canadian Ice Service Arctic Regional Sea Ice Charts in SIGRID-3 Format native_id: G02171 processing_level: ~ publication_year: ~ release_dt: 2009-10-09T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 2006-01-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02171 url: http://nsidc.org/data/G02171 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'The U.S. National Ice Center (NIC) is an inter-agency sea ice analysis and forecasting center comprised of the Department of Commerce/NOAA, the Department of Defense/U.S. Navy, and the Department of Homeland Security/U.S. Coast Guard components. Since 1972, NIC has produced Arctic and Antarctic sea ice charts. This data set is comprised of Arctic sea ice concentration climatology derived from the NIC weekly or biweekly operational ice-chart time series. The charts used in the climatology are from 1972 through 2007; and the monthly climatology products are median, maximum, minimum, first quartile, and third quartile concentrations, as well as frequency of occurrence of ice at any concentration for the entire period of record as well as for 10-year and 5-year periods. These climatologies and the charts from which they are derived are provided in the 25-km Equal-Area Scalable Earth Grid (EASE-Grid) binary (.bin) format. The climatologies are also available in ArcGIS geodatabases (.mdb), and GIF format browse files (.gif) are also provided. NIC charts are produced through the analyses of available in situ, remote sensing, and model data sources. They are generated primarily for mission planning and safety of navigation. NIC charts generally show more ice than do passive microwave derived sea ice concentrations, particularly in the summer when passive microwave algorithms tend to underestimate ice concentration. The record of sea ice concentration from the NIC series is believed to be more accurate than that from passive microwave sensors, especially from the mid-1990s on (see references at the end of this documentation), but it lacks the consistency of some passive microwave time series.' description_attribution: http://nsidc.org/data/g01111.html doi: 10.7265/N5X34VDB end_time: 2007-12-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02172.yaml identifier: nsidc-g02172 lat_max: 90 lat_min: 45 lon_max: 180 lon_min: -180 name: National Ice Center Arctic Sea Ice Charts and Climatologies in Gridded Format native_id: G02172 processing_level: ~ publication_year: ~ release_dt: 2006-01-01T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1972-01-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02172 url: http://nsidc.org/data/G02172 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'In the Beaufort and Chukchi Seas, the most significant sea ice anomalies have occurred in the summer ice extent (Eicken et al. 2006). In addition, there has been a considerable decline in the multiyear ice pack in this region (Eicken et al. 2006). To help understand these anomalies, this data set contains information on recurring spring leads and landfast ice extent in this area. This data set maps and documents the spatial and temporal distribution of recurring leads and landfast ice off the coast of northern Alaska in the Chukchi and Beaufort Seas (Eicken et al. 2006). The leads data span from 1993 through 2004 and are based on visible and infrared Advanced Very High Resolution Radiometer (AVHRR) data onboard the NOAA 12, 14, 15, 16, and 17 satellites. The landfast ice extent data extend from 1996 through 2004 and are based on RADARSAT-1 Synthetic Aperture Radar (SAR) imagery. The data are available in a number of formats including ArcGIS geodatabases (.mdb), shapefiles (.shp), ArcGIS grids (.adf), ArcGIS grids in ArcInfo interchange format (.e00), and GeoTIFFs (.tif). Statistics are also provided in Microsoft Excel spreadsheets (.xls) and metadata in several formats including XML (.xml), SGML (.sgml), HTML (.html), and ASCII text (.txt). Quick-view browse images in JPEG (.jpg) format are provided for the shapefiles, grids, and GeoTIFFs. Data are available via FTP.' description_attribution: ~ doi: 10.7265/N5SB43P0 end_time: 2004-07-29T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02173.yaml identifier: nsidc-g02173 lat_max: 73.95769 lat_min: 68.48204 lon_max: -129.87714 lon_min: -164.08084 name: 'Recurring Spring Leads and Landfast Ice in the Beaufort and Chukchi Seas, 1993-2004' native_id: G02173 processing_level: ~ publication_year: ~ release_dt: 2009-06-17T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1993-12-09T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02173 url: http://nsidc.org/data/G02173 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'This data set updates and expands the NOAA Global Historical Climate Network (GHCN) of quality controlled meteorological records, focusing on the Northern Tien Shan and Pamir Mountain Ranges of Central Asia. It is compiled primarily from meteorological measurements conducted by the National Hydrometeorological Services (NHMS) of the Central Asian countries. Precipitation data are monthly sums bias corrected for gauge type and for wetting, but not for wind. The correction factors, K1 for gauge type, K2 for wind, and K3 for wetting, are included as separate files. Temperature data are monthly means, for example, the mean of daily temperatures for that month, where daily temperature is defined as the average of all observations for each calendar day. For many stations, average maximum and average minimum temperature are supplied as well. These are derived from daily maximum and minimum temperatures. The station metadata for this data set are station histories, population, vegetation, and topography. Data were subjected to rigorous quality control and homogenieity assessment procedures, consistent with those used for the GHCN. There are records from 298 stations. The period of record covered by each station is variable, and in the period from 1985 to 1995, there was a sharp reduction in the number of operating stations. The earliest record is from 1879. Records are updated through 2003 where data are available. Most stations have almost 100 years of observations. Records are from stations in Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan. The data are stored as tab-delimited ASCII text format, Microsoft Excel, and PDF, and are availabe via FTP.' description_attribution: http://nsidc.org/data/g02141.html doi: 10.7265/N5NK3BZ8 end_time: 2003-12-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02174.yaml identifier: nsidc-g02174 lat_max: 50 lat_min: 35 lon_max: 85 lon_min: 55 name: 'Central Asia Temperature and Precipitation Data, 1879-2003' native_id: G02174 processing_level: ~ publication_year: ~ release_dt: 2008-02-18T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1879-01-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02174 url: http://nsidc.org/data/G02174 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'This film documents student hiking trips conducted by the University of Colorado at Boulder in the Rocky Mountains, Colorado, USA during the summers of 1938-1942. The hikes took place in various locations west of Boulder, including Rocky Mountain National Park, Indian Peaks Wilderness, and Roosevelt National Forest. The film contains rare historical footage of the Rocky Mountains, including Arapaho Glacier and Fair Glacier. The film provides a unique record of what those areas looked like at that time, and may provide visual information on the extent of the glaciers. The film was created by the University of Colorado Department of Mountain Recreation. The original film consists of four reels, in 16mm Kodachrome format. The film was restored and digitized with support from the NOAA National Geophysical Data Center, Boulder, and the NOAA Climate Database Modernization Program. Digitized copies of the film are available on DVD. For information on ordering a copy, please contact NSIDC User Services.' description_attribution: http://nsidc.org/data/g00472.html doi: 10.7265/N5HT2M7Z end_time: 1942-12-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02175.yaml identifier: nsidc-g02175 lat_max: 40.54 lat_min: 40 lon_max: -105.5 lon_min: -105.9 name: 'Good Days on the Trail, 1938-1942: Film Footage of the Rocky Mountains, Colorado' native_id: G02175 processing_level: ~ publication_year: ~ release_dt: 2007-04-17T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1938-01-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02175 url: http://nsidc.org/data/G02175 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: '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. There is a gap with no charts from 1993 through 1996. Chart coverage focuses on the Northern Sea Route, although later charts extend into the central Arctic. The charts were compiled from a variety of data sources, with heavy reliance on regular reconnaissance flights for most of the series until 1992. Early paper charts were digitized, and the entire series, including later charts that were produced entirely digitally, were converted to Sea Ice Grid (SIGRID) format at AARI. AARI provided code to read the SIGRID data and convert it to a format close to Equal Area Scalable (EASE)-Grid. NSIDC completed the conversion to EASE-Grid. The EASE-Grid is in a Lambert equal-area projection with 12.5 km cell size. Total ice concentration, as well as partial concentrations for multiyear, first-year, new/young ice (ice younger than first-year ice), and fast ice, are given in EASE-Grid (binary), SIGRID (ASCII), and browse (PNG) files. Data are available via FTP. This data set replaces and updates the previous data set, AARI 10-Day Arctic Ocean EASE-Grid Sea Ice Observations (nsidc-0050, discontinued December 2007), and the Russian Arctic charts on the Environmental Working Group Joint U.S.-Russian Arctic Sea Ice Atlas (http://nsidc.org/data/g01962.html). Access to the data is unrestricted, but users are encouraged to register for the data. Registered users will receive e-mail notification about any product changes.' description_attribution: http://nsidc.org/data/g00799.html doi: 10.7265/N5D21VHJ end_time: 1992-12-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02176.yaml identifier: nsidc-g02176 lat_max: 90 lat_min: 60 lon_max: -130 lon_min: -180 name: 'Sea Ice Charts of the Russian Arctic in Gridded Format, 1933-2006' native_id: G02176 processing_level: ~ publication_year: ~ release_dt: 2007-11-12T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1933-01-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02176 url: http://nsidc.org/data/G02176 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'This data set provides measurement of sea ice draft (m) and the movement of sea ice (cm/s) over the continental shelf of the Eastern Beaufort Sea. The data set spans April 1990 to September 2003. The data set was acquired to assist in determining the character and recurrence of ice features hazardous to offshore industrial activity, specifically for the exploitation of hydrocarbon reserves and the impact of climate variability and change on the Beaufort Sea ice regime. Observations were made using two types of self-contained Upward Looking Sonar (ULS) moored near the sea floor: an Ice Profiling Sonar (IPS) used to obtain ice draft data and an Acoustic Doppler Current Profiler (ADCP) used to obtain the ice velocity data. The data are provided in ASCII text format and are available via FTP.' description_attribution: http://nsidc.org/data/g01359.html doi: 10.7265/N58913S6 end_time: 2003-09-30T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02177.yaml identifier: nsidc-g02177 lat_max: 74.152 lat_min: 70.083 lon_max: -125.577 lon_min: -133.828 name: 'Ice Draft and Ice Velocity Data in the Beaufort Sea, 1990-2003' native_id: G02177 processing_level: ~ publication_year: ~ release_dt: 2008-09-01T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1990-04-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02177 url: http://nsidc.org/data/G02177 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'The Barnes Ice Cap data set contains survey measurements of a network of 43 stakes along a 10 km flow line on the northeast flank of the south dome of the Barnes Ice Cap. The measurements are of mass balance, surface velocity, and surface elevation. They were taken over a period of time from 1970 to 1984. The data set came from a hard copy computer printout containing raw data as well as processed quantities. This printout was scanned and digitized into a PDF file. This PDF file was put through Optical Character Recognition (OCR) software and saved as another PDF file. The resultant PDF file is human readable and all values are correct when viewed in an Adobe PDF reader. However, if you copy the contents and paste them into another application there may be errors in the values as the OCR process did not accurately compute all characters correctly. If you copy the data values into another application for analysis, double check the values against what is in the PDF file. The data are available via FTP.' description_attribution: ~ doi: 10.7265/N54M92GN end_time: 1984-12-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02178.yaml identifier: nsidc-g02178 lat_max: 69.83333 lat_min: 69.7 lon_max: -72.06667 lon_min: -72.16667 name: Barnes Ice Cap South Dome Trilateration Net Survey Data 1970-1984 native_id: G02178 processing_level: ~ publication_year: ~ release_dt: 2010-09-08T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1970-01-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02178 url: http://nsidc.org/data/G02178 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'This data set consists of optical band reconnaissance imagery of the Surface Heat Balance of the Arctic (SHEBA) site acquired between August 1997 and September 1998. The images cover a variable area on the order of 15 km by 40 km, at a resolution of about 1 m. Some, but not all of the images contain the SHEBA experiment platform (the Canadian icebreaker Des Groseillers). The National Imagery and Mapping Agency approved the release of the imagery at the request of the National Science Foundation (NSF).' description_attribution: http://nsidc.org/data/g02159.html doi: 10.7265/N50V89RX end_time: 1998-10-03T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02180.yaml identifier: nsidc-g02180 lat_max: 90 lat_min: 74 lon_max: 180 lon_min: -180 name: SHEBA Reconnaissance Imagery native_id: G02180 processing_level: ~ publication_year: ~ release_dt: 2000-01-01T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1997-08-25T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02180 url: http://nsidc.org/data/G02180 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'The Sea Ice Edge Location and Extent in the Russian Arctic, 1933-2006 data are derived from sea ice charts from the Arctic and Antarctic Research Institute (AARI), St. Petersburg, Russia. Provided here are sea ice edge locations, where identifiable, in each AARI ice chart and monthly and seasonal mean sea ice extents for each of the marginal seas in the Russian Arctic derived from these ice edges. The original AARI charts were constructed primarily to assist operations in the Northern Sea Route. The digital version, from which this data set is derived, is titled Sea Ice Charts of the Russian Arctic in Gridded Format, 1933-2006. Spatial and temporal coverage vary. There is generally a chart every 10 days. However, the early part of the series only covers summer; in later years, coverage is year round. Sea ice edge position is given in decimal degrees (latitude at every degree longitude from about 30° W to 150° W going from west to east) for each of the 2877 ice charts. Landfast ice edge, multiyear ice edge, and pack ice edge data are available. Total ice cover and multiyear ice cover mean sea ice extent data, for each year, month, and marginal sea, is available as well, along with companion error statistic files.' description_attribution: http://nsidc.org/data/g02176.html doi: 10.7265/N5W37T8Z end_time: 2006-12-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02182.yaml identifier: nsidc-g02182 lat_max: 90 lat_min: 65 lon_max: 145 lon_min: 40 name: 'Sea Ice Edge Location and Extent in the Russian Arctic, 1933-2006' native_id: G02182 processing_level: ~ publication_year: ~ release_dt: 2008-06-30T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1933-07-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02182 url: http://nsidc.org/data/G02182 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'The project described in this documentary was a pilot study conducted in 1972 in preparation for the AIDJEX main experiment of 1975 to 1976. The study included a main camp on drifting sea ice in the Beaufort Sea north of Alaska along with two satellite camps forming a station triangle with a 100 km side length. A detailed description of the observational program and a running account of the results can be found in the AIDJEX Bulletin series published between 1970 and the end of the project in 1978. The Bulletin is accessible in hard copy in the Roger G. Barry Resource Office for Cryospheric Studies at NSIDC. The Polar Science Center at the University of Washington maintains an AIDJEX electronic library. It includes downloadable copies of the contents of all 40 AIDJEX Bulletins, AIDJEX Operations Manuals for the Pilot Study and the Main Experiment, and other resources. The film was produced by Hannes Zell and Dieter Wittich of Vienna, Austria under an arrangement with the AIDJEX Project Office at the University of Washington. The transfer of the original 16 mm film to electronic medium was performed by Victory Studios of Seattle, Washington, USA. The digital copy was donated to NSIDC by Dr. Norbert Untersteiner, AIDJEX Project Director.' description_attribution: http://nsidc.org/data/g01358.html doi: 10.7265/N5RB72JM end_time: 1972-05-31T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02183.yaml identifier: nsidc-g02183 lat_max: 80 lat_min: 72 lon_max: -125 lon_min: -165 name: 'Arctic Ice Dynamics Joint Experiment (AIDJEX) Second Pilot Study, March - May 1972: A Documentary Film' native_id: G02183 processing_level: ~ publication_year: ~ release_dt: 2008-12-12T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1972-03-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02183 url: http://nsidc.org/data/G02183 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'This film documents the activities that occurred on Drifting Station Alpha in the Arctic Ocean during the International Geophysical Year, 1957 to 1958. The film is narrated by project leader, Norbert Untersteiner, and chronicles the life of the team as they built their camp and set up experiments. Station Alpha was the first long-term scientific base on arctic pack ice operated by a Western country. At the time of its establishment, Russia had already operated six drifting ice camps of this kind. However, due to the strategic importance and sensitivity of the Arctic Basin, little information from these early stations had reached the West. The documentary was filmed and produced by Frans van der Hoeven (Senior Scientist at Station Alpha) and Norbert Untersteiner (Scientific Leader of Station Alpha). Station Alpha drifted in an area of the Arctic ocean located 500 km north of Barrow, Alaska USA from April 1957 to November 1958; the film covers this entire time period. Digitized copies of the film are available on DVD.' description_attribution: http://nsidc.org/data/g01938.html doi: 10.7265/N5MK69TW end_time: 1958-11-30T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02184.yaml identifier: nsidc-g02184 lat_max: 87 lat_min: 80 lon_max: 180 lon_min: 110 name: 'International Geophysical Year, 1957-1958: Drifting Station Alpha Documentary Film' native_id: G02184 processing_level: ~ publication_year: ~ release_dt: 2009-07-31T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1957-04-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02184 url: http://nsidc.org/data/G02184 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: 'The Multisensor Analyzed Sea Ice Extent Northern Hemisphere (MASIE-NH) products provide measurements of daily sea ice extent and sea ice edge boundary for the Northern Hemisphere and 16 Arctic regions in a polar stereographic projection. Products include an ASCII text file of sea ice extent values in square km over the entire Northern Hemisphere with 16 separate Arctic regions identified, time series plots of the 16 regions, and image files that visually show where the sea ice is. The MASIE-NH imagery are provided at a nominal 4 km resolution. The input data comes from the 4 km Interactive Multisensor Snow and Ice Mapping System (IMS) snow and ice product produced by the National Ice Center (NIC). NIC utilizes visible imagery, passive microwave data, and NIC weekly analysis products to create their data product. The MASIE-NH products are distributed in a number of formats including ASCII text, GeoTIFF, PNG, shapefiles, and Google Earth files and are available from 01 October 2006 to the present. The most recent days worth of imagery plus the ASCII text data file are provided via the MASIE Web site. A complete archive of the imagery and data can be obtained via FTP. Note: MASIE may look like several other sea ice products distributed at NSIDC and elsewhere, but its source data and intended uses are different. If intended and appropriate uses of the data are not clear after reading the documentation, please contact NSIDC User Services.' description_attribution: http://nsidc.org/data/g02156.html doi: 10.7265/N5GT5K3K end_time: ~ href: http://52.38.26.42:8080/dataset/nsidc-g02186.yaml identifier: nsidc-g02186 lat_max: 90 lat_min: 0 lon_max: 180 lon_min: -180 name: 'Multisensor Analyzed Sea Ice Extent - Northern Hemisphere (MASIE-NH)' native_id: G02186 processing_level: ~ publication_year: ~ release_dt: 2010-12-14T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 2006-10-01T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02186 url: http://nsidc.org/data/G02186 variables: ~ version: ~ vertical_extent: ~ - access_dt: ~ attributes: ~ cite_metadata: ~ data_qualifier: ~ description: "The Submarine Arctic Science Program, SCICEX, is a federal interagency collaboration among the operational Navy, research agencies, and the marine research community to use nuclear-powered submarines for scientific studies of the Arctic Ocean. Unlike surface ships, submarines have the unique ability to operate and take measurements regardless of sea ice cover, weather conditions, and time of year. This allows for a broad and comprehensive investigation of an entire ocean basin. The goal of the program is to acquire comprehensive data about Arctic sea ice, water properties (biological, chemical, and hydrographic), and water depth (bathymetry) to improve our understanding of the Arctic Ocean basin and its role in the Earth's climate system. SCICEX is important because it adds critical pieces to the overall information needed to analyze sea ice and ocean dynamics. Data collection began in 1993 and is on going." description_attribution: ~ doi: 10.7265/N5930R3Z end_time: 2005-11-20T00:00:00 href: http://52.38.26.42:8080/dataset/nsidc-g02187.yaml identifier: nsidc-g02187 lat_max: 90 lat_min: 71 lon_max: 180 lon_min: -180 name: 'SCICEX: Submarine Arctic Science Program' native_id: G02187 processing_level: ~ publication_year: ~ release_dt: 2009-11-01T00:00:00 scale: ~ scope: ~ spatial_extent: ~ spatial_ref_sys: ~ spatial_res: ~ start_time: 1993-08-23T00:00:00 temporal_extent: ~ temporal_resolution: ~ type: ~ uri: /dataset/nsidc-g02187 url: http://nsidc.org/data/G02187 variables: ~ version: ~ vertical_extent: ~