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Brought to you by NOAA NMFS SWFSC ERD
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PolarWatch ERDDAP
Easier access to scientific data |
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Brought to you by NOAA NMFS SWFSC ERD |
| Row Type | Variable Name | Attribute Name | Data Type | Value |
|---|---|---|---|---|
| attribute | NC_GLOBAL | cdm_data_type | String | Other |
| attribute | NC_GLOBAL | Conventions | String | COARDS, CF-1.6, ACDD-1.3 |
| attribute | NC_GLOBAL | defaultGraphQuery | String | longitude%2Clatitude%2CElevation%26time%3E%3D2018-04-10T00%3A00%3A00Z%26time%3C%3D2018-04-17T00%3A00%3A00Z%26.draw=markers%26t.marker=6%7C%26.color=0x000000%26.colorBar=KT_amp%7C%7C%7C%7C%7C |
| attribute | NC_GLOBAL | Easternmost_Easting | double | 179.9947664 |
| attribute | NC_GLOBAL | geospatial_lat_max | double | 89.99707309 |
| attribute | NC_GLOBAL | geospatial_lat_min | double | 67.23399119 |
| attribute | NC_GLOBAL | geospatial_lat_units | String | degrees_north |
| attribute | NC_GLOBAL | geospatial_lon_max | double | 179.9947664 |
| attribute | NC_GLOBAL | geospatial_lon_min | double | -179.99844221 |
| attribute | NC_GLOBAL | geospatial_lon_units | String | degrees_east |
| attribute | NC_GLOBAL | infoUrl | String | https://www.star.nesdis.noaa.gov/sod/lsa/SeaIce/SurfaceElevation.php
|
| attribute | NC_GLOBAL | institution | String | NOAA NESDIS STAR |
| attribute | NC_GLOBAL | keywords | String | along, along-track, Along_track_Distance, Along_Track_Grid_Cell_Number, cell, data, deviation, distance, elevation, grid, latitude, local, longitude, num, Num_Pts, number, pts, source, standard, Standard_Deviation, statistics, time, time2, track |
| attribute | NC_GLOBAL | license | String | The data may be used and redistributed for free but is not intended\nfor legal use, since it may contain inaccuracies. Neither the data\nContributor, ERD, NOAA, nor the United States Government, nor any\nof their employees or contractors, makes any warranty, express or\nimplied, including warranties of merchantability and fitness for a\nparticular purpose, or assumes any legal liability for the accuracy,\ncompleteness, or usefulness, of this information. |
| attribute | NC_GLOBAL | Northernmost_Northing | double | 89.99707309 |
| attribute | NC_GLOBAL | sourceUrl | String | (local files) |
| attribute | NC_GLOBAL | Southernmost_Northing | double | 67.23399119 |
| attribute | NC_GLOBAL | standard_name_vocabulary | String | CF Standard Name Table v70 |
| attribute | NC_GLOBAL | summary | String | This dataset contains the NOAA / NESDIS / STAR / LSA Polar Ocean Data System (PODS) Arctic Gridded Surface Elevation Product. The Gridded Surface Elevation Product is derived from Airborne Topographic Mapper (ATM) lidar elevation data acquired during annual, low-altitude NASA Operation IceBridge airborne surveys over Arctic sea ice. IceBridge ATM data were acquired between March and May, 2009 - 2019. Due to the conical scanning geometry of the ATM lidar, across-track sampling is non-uniform, with sampling density greatest at the swath edges. To account for the variation in sample density, ATM elevation data are gridded (See Figure 1 on Data Product Webpage). Each grid cell has an along-track dimension of 30 m and an across-track dimension that is inversely proportional to the across-track sampling density. The grid configuration optimizes ATM sample density providing high-resolution measurements of elevation while still containing enough point measurements for robust statistical calculations. Citation: Users are asked to cite the following publication whenever these data are used:\n Connor, L., S. Farrell and D. McAdoo (2017), A decadal study of interannual variability in Arctic sea ice freeboard using airborne laser altimetry (2006-2016), presented at the 2017 IGS International Symposium on Polar Ice, Polar Climate, and Polar Change, Boulder, Colorado, 14-19 Aug. 2017.\n Point of Contact: Laurence.Connor@noaa.gov\n Data Product Webpage: https://www.star.nesdis.noaa.gov/sod/lsa/SeaIce/SurfaceElevation.php |
| attribute | NC_GLOBAL | time_coverage_end | String | 2018-04-16T16:30:20.114Z |
| attribute | NC_GLOBAL | time_coverage_start | String | 2009-03-31T12:28:04.781Z |
| attribute | NC_GLOBAL | title | String | Sea Ice Surface Elevation from IceBridge ATM LIDAR, Arctic, from 2009 to 2018 Airborne Surveys |
| attribute | NC_GLOBAL | Westernmost_Easting | double | -179.99844221 |
| variable | time | double | ||
| attribute | time | _CoordinateAxisType | String | Time |
| attribute | time | actual_range | double | 1.238502484781E9, 1.523896220114E9 |
| attribute | time | axis | String | T |
| attribute | time | comment | String | Time (seconds since 1970-01-01T00:00:00.000Z), minimum time of all ATM point measurements within 10 across-track grid cells\" |
| 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 | time_precision | String | 1970-01-01T00:00:00.000Z |
| attribute | time | units | String | seconds since 1970-01-01T00:00:00Z |
| variable | Along_track_Distance | float | ||
| attribute | Along_track_Distance | actual_range | float | 1000.0, 2002000.0 |
| attribute | Along_track_Distance | comment | String | Along-track distance (meters), relative to the beginning of the flight line |
| attribute | Along_track_Distance | ioos_category | String | Unknown |
| attribute | Along_track_Distance | long_name | String | Along-track Distance |
| attribute | Along_track_Distance | units | String | meters |
| variable | Across_Track_Grid_Cell_Number | byte | ||
| attribute | Across_Track_Grid_Cell_Number | _FillValue | byte | 127 |
| attribute | Across_Track_Grid_Cell_Number | actual_range | byte | 1, 10 |
| attribute | Across_Track_Grid_Cell_Number | colorBarMaximum | double | 100.0 |
| attribute | Across_Track_Grid_Cell_Number | colorBarMinimum | double | 0.0 |
| attribute | Across_Track_Grid_Cell_Number | ioos_category | String | Statistics |
| attribute | Across_Track_Grid_Cell_Number | long_name | String | Cross-Track Grid Cell Number |
| variable | longitude | double | ||
| attribute | longitude | _CoordinateAxisType | String | Lon |
| attribute | longitude | _FillValue | double | NaN |
| attribute | longitude | actual_range | double | -179.99844221, 179.9947664 |
| attribute | longitude | axis | String | X |
| attribute | longitude | colorBarMaximum | double | 180.0 |
| attribute | longitude | colorBarMinimum | double | -180.0 |
| attribute | longitude | comment | String | Longitude (degrees), mean longitude of ATM point measurements within grid cell |
| attribute | longitude | ioos_category | String | Location |
| attribute | longitude | long_name | String | Longitude |
| attribute | longitude | standard_name | String | longitude |
| attribute | longitude | units | String | degrees_east |
| variable | latitude | double | ||
| attribute | latitude | _CoordinateAxisType | String | Lat |
| attribute | latitude | _FillValue | double | NaN |
| attribute | latitude | actual_range | double | 67.23399119, 89.99707309 |
| attribute | latitude | axis | String | Y |
| attribute | latitude | colorBarMaximum | double | 90.0 |
| attribute | latitude | colorBarMinimum | double | -90.0 |
| attribute | latitude | comment | String | Latitude (degrees), mean latitude of ATM point measurements within grid cell |
| attribute | latitude | ioos_category | String | Location |
| attribute | latitude | long_name | String | Latitude |
| attribute | latitude | standard_name | String | latitude |
| attribute | latitude | units | String | degrees_north |
| variable | Elevation | float | ||
| attribute | Elevation | _FillValue | float | NaN |
| attribute | Elevation | actual_range | float | -16.521, 50.0 |
| attribute | Elevation | comment | String | Elevation (meters, relative to WGS84 ellipsoid), mean elevation of ATM elevation point measurements within grid cell |
| attribute | Elevation | ioos_category | String | Location |
| attribute | Elevation | long_name | String | Elevation |
| attribute | Elevation | units | String | meters |
| variable | Standard_Deviation | float | ||
| attribute | Standard_Deviation | _FillValue | float | NaN |
| attribute | Standard_Deviation | actual_range | float | 0.0, 4.3024 |
| attribute | Standard_Deviation | colorBarMaximum | double | 50.0 |
| attribute | Standard_Deviation | colorBarMinimum | double | 0.0 |
| attribute | Standard_Deviation | comment | String | Standard Deviation (meters), standard deviation of ATM elevation point measurements within grid cell |
| attribute | Standard_Deviation | ioos_category | String | Statistics |
| attribute | Standard_Deviation | long_name | String | Standard Deviation |
| attribute | Standard_Deviation | units | String | meters |
| variable | Num_Pts | float | ||
| attribute | Num_Pts | actual_range | float | 0.0, 1543.0 |
| attribute | Num_Pts | comment | String | Number of ATM point measurements within grid cell |
| attribute | Num_Pts | ioos_category | String | Unknown |
| attribute | Num_Pts | long_name | String | Number of Points |