ERDDAP: Easier access to scientific data
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NOAA CoastWatch
ERDDAP: Easier access to scientific data |
| Grid DAP Data | Sub- set | Table DAP Data | Make A Graph | W M S | Source Data Files | Title | Sum- mary | FGDC, ISO, Metadata | Back- ground Info | RSS | Institution | Dataset ID | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| data | graph | M | files | Sea Ice Extent and Concentration V2, NOAA/NSIDC, Arctic, 25km, 1850-Onward, Monthly | 
| F I M | background
| 
|
| nsidcSeaIceConc1850 |
| Row Type | Variable Name | Attribute Name | Data Type | Value |
|---|---|---|---|---|
| attribute | NC_GLOBAL | _NCProperties | String | version=2,netcdf=4.6.3,hdf5=1.10.5 |
| attribute | NC_GLOBAL | cdm_data_type | String | Grid |
| attribute | NC_GLOBAL | citation | String | https://doi.org/10.1111/j.1931-0846.2016.12195.x |
| attribute | NC_GLOBAL | comment | String | The data provided by PolarWatch are the gridded subset of the data package provided by NSIDC. Additional regional and arctic-wide ice extent, ice area, masks and ancillary data are available in the zip package from NSIDC at the source_url link. The V2.0 extent and area values are slightly higher than those derived from V1.0. To create V1.1, inconsistencies in the V1.0 land mask were addressed by applying an -- if ever land, always land-- rule to grid cells. This had the effect of slightly expanding the land mask, so that the area covered by ocean cells, and thus the area that could contain sea ice, was proportionally reduced. The improved V2 land mask leaves more ocean cells in which ice may occur. In total, about 450,000 sq km of coastal ocean are added. V2.0 ice extent and area differ from extent and area derived using V1.0, simply because the V1.0 and V2.0 land areas are not the same. This difference is greatest in the winter months, when ice reaches a greater expanse of coastline. Most of the higher V2.0 extent and area values are the result of the changed land mask, with the change in input CDR source data version being an additional factor in the satellite era. There is a seasonal effect in the change attributable to the improved land mask. Metadata were alter to be in compliance with CF and ACDD standards. |
| attribute | NC_GLOBAL | contributor_email | String | walsh@wx.atmos.uiuc.edu, chapman@faldo.atmos.uiuc.edu, fetterer@nsidc.org |
| attribute | NC_GLOBAL | contributor_name | String | John E. Walsh, William L. Chapman, Florence Fetterer, J. S. Stewart |
| attribute | NC_GLOBAL | contributor_role | String | investigator, investigator, investigator, investigator |
| attribute | NC_GLOBAL | Conventions | String | CF-1.6, ACDD-1.3 |
| attribute | NC_GLOBAL | creator_email | String | walsh@wx.atmos.uiuc.edu, chapman@faldo.atmos.uiuc.edu, fetterer@nsidc.org |
| attribute | NC_GLOBAL | creator_name | String | John E. Walsh, William L. Chapman, Florence Fetterer, J. S. Stewart |
| attribute | NC_GLOBAL | creator_type | String | group |
| attribute | NC_GLOBAL | dataset_doi | String | https://nsidc.org/data/g10010 |
| attribute | NC_GLOBAL | date_created | String | 2019-09-03T00:00:00Z |
| attribute | NC_GLOBAL | date_issued | String | 2019-09-03T00:00:00Z |
| attribute | NC_GLOBAL | Easternmost_Easting | double | 359.875 |
| attribute | NC_GLOBAL | geospatial_lat_max | double | 89.875 |
| attribute | NC_GLOBAL | geospatial_lat_min | double | 30.125 |
| attribute | NC_GLOBAL | geospatial_lat_resolution | double | 0.25 |
| attribute | NC_GLOBAL | geospatial_lat_units | String | degrees_north |
| attribute | NC_GLOBAL | geospatial_lon_max | double | 359.875 |
| attribute | NC_GLOBAL | geospatial_lon_min | double | 0.125 |
| attribute | NC_GLOBAL | geospatial_lon_resolution | double | 0.25 |
| attribute | NC_GLOBAL | geospatial_lon_units | String | degrees_east |
| attribute | NC_GLOBAL | history | String | Apr 19 2020: netCDF modified via nco tools to expand dimension of the grid_cell_area variable for compatability with ERDDAP: ncap2 -s gridcell_area_2d[time,latitude,longitude]= Gridcell_Area, Jan 27 2020: downloaded zip package including netCDF file from ftp://sidads.colorado.edu/pub/DATASETS/NOAA/G10010_V2/ |
| attribute | NC_GLOBAL | id | String | g10010 |
| attribute | NC_GLOBAL | infoUrl | String | https://nsidc.org/data/g10010 |
| attribute | NC_GLOBAL | institution | String | NOAA NESDIS PolarWatch |
| attribute | NC_GLOBAL | instrument | String | SSM/I, visual observations |
| attribute | NC_GLOBAL | keywords | String | 1850, Earth Science > Cryosphere > Sea Ice > Ice Extent, Earth Science > Cryosphere > Sea Ice > Sea Ice Concentration, Earth Science > Oceans > Sea Ice > Ice Extent, historical, NSIDC, sea ice concentration |
| attribute | NC_GLOBAL | keywords_vocabulary | String | GCMD Science Keywords |
| attribute | NC_GLOBAL | license | String | The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information. |
| attribute | NC_GLOBAL | metadata_link | String | https://nsidc.org/api/dataset/metadata/v2/oai?verb=GetRecord&metadataPrefix=dif&identifier=G10010.002 |
| attribute | NC_GLOBAL | naming_authority | String | data/org.nsidc |
| attribute | NC_GLOBAL | NCO | String | netCDF Operators version 4.7.9 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco) |
| attribute | NC_GLOBAL | Northernmost_Northing | double | 89.875 |
| attribute | NC_GLOBAL | platform | String | DMSP, ships |
| attribute | NC_GLOBAL | publisher_email | String | erd.data at noaa.gov |
| attribute | NC_GLOBAL | publisher_name | String | NOAA NMFS SWFSC ERD and NOAA NESDIS PolarWatch |
| attribute | NC_GLOBAL | publisher_type | String | institution |
| attribute | NC_GLOBAL | references | String | Walsh, J. E., W. L. Chapman, F. Fetterer, and J. S. Stewart. 2019. Gridded Monthly Sea Ice Extent and Concentration, 1850 Onward, Version 2. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: https://doi.org/10.7265/jj4s-tq79 |
| attribute | NC_GLOBAL | release_date | String | February 28, 2019 |
| attribute | NC_GLOBAL | source | String | microwave satellite observations, visual observations |
| attribute | NC_GLOBAL | sourceUrl | String | ftp://sidads.colorado.edu/pub/DATASETS/NOAA/G10010_V2/ |
| attribute | NC_GLOBAL | Southernmost_Northing | double | 30.125 |
| attribute | NC_GLOBAL | summary | String | Observations from historical sources are the basis of this monthly gridded sea ice concentration product that begins in 1850. In 1979, these sources give way to a single source: concentration from satellite passive microwave data. The historical observations come in many forms: ship observations, compilations by naval oceanographers, analyses by national ice services, and others. Monthly sea ice concentration is given in a 1/4 degree latitude by 1/4 degree longitude grid. In addition to the concentration array, for each month a corresponding source array indicates where each of 16 possible sources is used. |
| attribute | NC_GLOBAL | time_coverage_end | String | 2017-12-16T12:00:00Z |
| attribute | NC_GLOBAL | time_coverage_resolution | String | P1M |
| attribute | NC_GLOBAL | time_coverage_start | String | 1850-01-15T12:00:00Z |
| attribute | NC_GLOBAL | title | String | Sea Ice Extent and Concentration V2, NOAA/NSIDC, Arctic, 25km, 1850-Onward, Monthly |
| attribute | NC_GLOBAL | version | String | 2.0 |
| attribute | NC_GLOBAL | Westernmost_Easting | double | 0.125 |
| dimension | time | double | nValues=2016, evenlySpaced=false, averageSpacing=30 days 10h 29m 36s | |
| attribute | time | _ChunkSizes | uint | 512 |
| attribute | time | _CoordinateAxisType | String | Time |
| attribute | time | actual_range | double | -3.7855728E9, 1.5134256E9 |
| attribute | time | axis | String | T |
| attribute | time | calendar | String | julian |
| attribute | time | coverage_content_type | String | coordinate |
| attribute | time | ioos_category | String | Time |
| attribute | time | long_name | String | Time |
| attribute | time | standard_name | String | time |
| attribute | time | time_origin | String | 01-JAN-1970 00:00:00 |
| attribute | time | units | String | seconds since 1970-01-01T00:00:00Z |
| dimension | latitude | float | nValues=240, evenlySpaced=true, averageSpacing=-0.25 | |
| attribute | latitude | _CoordinateAxisType | String | Lat |
| attribute | latitude | actual_range | float | 30.125, 89.875 |
| attribute | latitude | axis | String | Y |
| attribute | latitude | coverage_content_type | String | coordinate |
| attribute | latitude | ioos_category | String | Location |
| attribute | latitude | long_name | String | Latitude |
| attribute | latitude | standard_name | String | latitude |
| attribute | latitude | units | String | degrees_north |
| attribute | latitude | valid_max | float | 90.0 |
| attribute | latitude | valid_min | float | 30.0 |
| dimension | longitude | float | nValues=1440, evenlySpaced=true, averageSpacing=0.25 | |
| attribute | longitude | _CoordinateAxisType | String | Lon |
| attribute | longitude | actual_range | float | 0.125, 359.875 |
| attribute | longitude | axis | String | X |
| attribute | longitude | coverage_content_type | String | coordinate |
| attribute | longitude | ioos_category | String | Location |
| attribute | longitude | long_name | String | Longitude |
| attribute | longitude | standard_name | String | longitude |
| attribute | longitude | units | String | degrees_east |
| attribute | longitude | valid_max | float | 360.0 |
| attribute | longitude | valid_min | float | 0.0 |
| variable | seaice_conc | byte | time, latitude, longitude | |
| attribute | seaice_conc | _ChunkSizes | uint | 1, 240, 1440 |
| attribute | seaice_conc | colorBarMaximum | double | 100.0 |
| attribute | seaice_conc | colorBarMinimum | double | 0.0 |
| attribute | seaice_conc | colorBarPalette | String | KT_ice |
| attribute | seaice_conc | comment | String | Values are percent-concentration from 0 to 100. Sentinel value of 120 in the concentration field indicates land |
| attribute | seaice_conc | coverage_content_type | String | physicalMeasurement |
| attribute | seaice_conc | ioos_category | String | Ice Distribution |
| attribute | seaice_conc | long_name | String | Sea Ice Concentration (Percent) |
| attribute | seaice_conc | missing_value | byte | 120 |
| attribute | seaice_conc | short_name | String | Concentration |
| attribute | seaice_conc | standard_name | String | sea_ice_area_fraction |
| attribute | seaice_conc | units | String | 1 |
| variable | seaice_source | byte | time, latitude, longitude | |
| attribute | seaice_source | _ChunkSizes | uint | 1, 240, 1440 |
| attribute | seaice_source | colorBarContinuous | String | false |
| attribute | seaice_source | colorBarMaximum | double | 19.0 |
| attribute | seaice_source | colorBarMinimum | double | 0.0 |
| attribute | seaice_source | colorBarNSections | String | 19 |
| attribute | seaice_source | colorBarPalette | String | nsidc_seaIceSource |
| attribute | seaice_source | coverage_content_type | String | referenceInformation |
| attribute | seaice_source | ioos_category | String | Other |
| attribute | seaice_source | long_name | String | Source of Sea Ice Concentration Data |
| attribute | seaice_source | missing_value | byte | 0 |
| attribute | seaice_source | name_source_00 | String | Land |
| attribute | seaice_source | name_source_01 | String | Satellite passive microwave |
| attribute | seaice_source | name_source_02 | String | Danish Meteorological Institute |
| attribute | seaice_source | name_source_03 | String | Dehn |
| attribute | seaice_source | name_source_04 | String | NAVO yearbooks |
| attribute | seaice_source | name_source_05 | String | AARI |
| attribute | seaice_source | name_source_06 | String | Hill |
| attribute | seaice_source | name_source_07 | String | Whaling Records - Complete Sea Ice |
| attribute | seaice_source | name_source_08 | String | Whaling Records - Partial Sea Ice |
| attribute | seaice_source | name_source_09 | String | Whaling Records - No Sea Ice |
| attribute | seaice_source | name_source_10 | String | DMI yearbook narrative |
| attribute | seaice_source | name_source_11 | String | ACSYS |
| attribute | seaice_source | name_source_12 | String | Walsh and Johnson |
| attribute | seaice_source | name_source_13 | String | JMA charts |
| attribute | seaice_source | name_source_14 | String | Kelly ice extent grids |
| attribute | seaice_source | name_source_15 | String | Landmask correction fill |
| attribute | seaice_source | name_source_16 | String | Change-of-landmask ocean |
| attribute | seaice_source | name_source_17 | String | Analog fill - spatial |
| attribute | seaice_source | name_source_18 | String | Analog fill - temporal |
| attribute | seaice_source | short_name | String | Seaice Source |
| attribute | seaice_source | standard_name | String | source |
| attribute | seaice_source | units | String | 1 |
| variable | gridcell_area_2d | float | time, latitude, longitude | |
| attribute | gridcell_area_2d | colorBarMinimum | double | 0.0 |
| attribute | gridcell_area_2d | colorBarPalette | String | KT_amp |
| attribute | gridcell_area_2d | coverage_content_type | String | physicalMeasurement |
| attribute | gridcell_area_2d | ioos_category | String | Other |
| attribute | gridcell_area_2d | long_name | String | Grid Cell Area |
| attribute | gridcell_area_2d | short_name | String | Grid_Cell_Area |
| attribute | gridcell_area_2d | standard_name | String | cell_area |
| attribute | gridcell_area_2d | units | String | km^2 |
The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.