gov.noaa.nodc:0209230 eng utf8 model NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2025-05-16T15:50:31Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Sea Ice Surface Roughness derived from Airborne Topographic Mapper (ATM) lidar elevation data, Arctic, 2009-2018 (NCEI Accession 0209230) 2020-03-27 publication 2020-03-09 creation International DOI Foundation (IDF) 10.25921/mp9c-y528 NOAA National Centers for Environmental Information gov.noaa.nodc:0209230 NCEI Archive Management System 0209230 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Kyle Duncan University of Maryland, College Park (UMD) kyle.duncan@noaa.gov https://www.umd.edu/ HTTPS University of Maryland, College Park (UMD) website Institution web page information resourceProvider University of Maryland, College Park (UMD) https://www.umd.edu/ HTTPS University of Maryland, College Park (UMD) website Institution web page information resourceProvider Kyle Duncan University of Maryland, College Park (UMD) kyle.duncan@noaa.gov https://www.umd.edu/ HTTPS website Institution web page information pointOfContact Laurence Connor principalInvestigator Sinead Farrell collaborator Connor, Laurence author Duncan, Kyle University of Maryland, College Park (UMD) kyle.duncan@noaa.gov https://www.umd.edu/ HTTPS website Institution web page information author Farrell, Sinead author tableDigital The surface roughness is derived from Airborne Topographic Mapper (ATM) lidar elevation data acquired during annual, low-altitude NASA Operation IceBridge airborne surveys over Arctic sea ice between the months of March and May. Surface roughness is defined as the standard deviation of elevation per unit area. 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. 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 sea ice surface roughness while still containing enough point measurements for robust statistical calculations. Statistics are computed on the distribution of sea ice surface roughness for 10 km along-track segments, for each aircraft flight line. This dataset is available to the public for a wide variety of uses including scientific research and analysis. completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0209230 Preview graphic PNG 0209230 NCEI ACCESSION NUMBER 2020-02-11 publication ICE ICE - CHARACTERISTICS LATITUDE LONGITUDE theme NODC DATA TYPES THESAURUS GPS LIDAR instrument NODC INSTRUMENT TYPES THESAURUS model output theme NODC OBSERVATION TYPES THESAURUS University of Maryland, College Park dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Arctic Ocean Baffin Bay Beaufort Sea Chukchi Sea Greenland Sea (including Iceland Sea and North Greenland Sea) Kara Sea Lincoln Sea Northwestern Passages place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication EARTH SCIENCE > OCEANS > SEA ICE theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Maximum Surface Roughness Mean Surface Roughness Surface Roughness 25th Percentile Surface Roughness 5th Percentile Surface Roughness 75th Percentile Surface Roughness 95th Percentile Surface Roughness 99th Percentile Time theme Provider Keywords ATM > Airborne Topographic Mapper GPS RECEIVERS > GPS RECEIVERS LIDAR > Light Detection and Ranging instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Airborne Topographic Mapper (ATM) instrument Provider Instruments OCEAN > ARCTIC OCEAN OCEAN > ARCTIC OCEAN > BEAUFORT SEA OCEAN > ARCTIC OCEAN > CHUKCHI SEA place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian WFEL0U Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: Connor, Laurence; Duncan, Kyle; Farrell, Sinead (2020). Sea Ice Surface Roughness derived from Airborne Topographic Mapper (ATM) lidar elevation data, Arctic, 2009-2018 (NCEI Accession 0209230). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/mp9c-y528. Accessed [date]. Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. eng; USA utf8 environment oceans -180 180 67 90 2009-03-31 2018-04-16 NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. ASCII Text PNG 5.152 https://doi.org/10.25921/mp9c-y528 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/209230 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/209230 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0153/0209230/ FTP Any FTP client FTP These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP). download dataset NCEI Accession 0209230 v1.1 was published. 2020-03-27T19:56:30Z NCEI Accession 0209230 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0209230/1.1 HTTPS NCEI Accession 0209230 v1.1 published 2020-03-27T19:56:30Z download model Parameter or Variable: Time (calculated); Units: YYYY-MM-DD HH:MM:SS; Observation Category: model output; Sampling Instrument: GPS Parameter or Variable: LATITUDE (calculated); Units: degrees; Observation Category: model output; Sampling Instrument: GPS Parameter or Variable: LONGITUDE (calculated); Units: degrees; Observation Category: model output; Sampling Instrument: GPS Parameter or Variable: Mean Surface Roughness (calculated); Units: meters; Observation Category: model output; Sampling Instrument: LIDAR Parameter or Variable: Maximum Surface Roughness (calculated); Units: meters; Observation Category: model output; Sampling Instrument: LIDAR Parameter or Variable: Surface Roughness 5th Percentile (calculated); Units: meters; Observation Category: model output; Sampling Instrument: LIDAR Parameter or Variable: Surface Roughness 25th Percentile (calculated); Units: meters; Observation Category: model output; Sampling Instrument: LIDAR Parameter or Variable: Surface Roughness 75th Percentile (calculated); Units: meters; Observation Category: model output; Sampling Instrument: LIDAR Parameter or Variable: Surface Roughness 95th Percentile (calculated); Units: meters; Observation Category: model output; Sampling Instrument: LIDAR Parameter or Variable: Surface Roughness 99th Percentile (calculated); Units: meters; Observation Category: model output; Sampling Instrument: LIDAR asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian GPS GPS Global Positioning System receiver satellite-based instrument used for geo-location, positioning and navigation LIDAR LIDAR Light Detection and Ranging Remote sensing instrument with laser and receiver that uses time, strength and polarization of return to determine characteristics of target.