September 10, 2025 Dataset Open Access

Kern, Stefan

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{"conceptdoi":"10.25592/uhhfdm.17915","conceptrecid":"17915","created":"2025-09-09T09:56:46.995683+00:00","doi":"10.25592/uhhfdm.17916","id":17916,"links":{"badge":"https://www.fdr.uni-hamburg.de/badge/doi/10.25592/uhhfdm.17916.svg","conceptbadge":"https://www.fdr.uni-hamburg.de/badge/doi/10.25592/uhhfdm.17915.svg","conceptdoi":"http://doi.org/10.25592/uhhfdm.17915","doi":"http://doi.org/10.25592/uhhfdm.17916"},"metadata":{"access_right":"open","access_right_category":"success","communities":[{"id":"cen"},{"id":"icdc"},{"id":"uhh"}],"contributors":[{"affiliation":"Integrated Climate Data Center (ICDC), Center for Earth System Research and Sustainability (CEN), University of Hamburg, Hamburg, Germany","name":"Sadikni, Remon","type":"DataCurator"}],"creators":[{"affiliation":"Integrated Climate Data Center (ICDC), Center for Earth System Research and Sustainability (CEN), University of Hamburg, Hamburg, Germany","name":"Kern, Stefan","orcid":"0000-0001-7281-3746"}],"description":"<p><strong>Abstract:</strong> In the framework of the European Space Agency (ESA) Climate Change Initiative (CCI+) sea ice essential climate variable (ECV) project phase 2,&nbsp;Landsat-1 Multispectral Scanner (MSS) images were obtained from&nbsp;<a href=\"https://earthexplorer.usgs.gov/\">https://earthexplorer.usgs.gov/</a> for both hemispheres with the purpose to evaluate the ESA CCI+ Nimbus-5 Electrically Scanning Microwave Radiometer (ESMR) sea-ice concentration data product v1.1. From these Landsat-1 MSS images surface broadband albedo values were estimated based on channels 4 to 7 (mostly 4, 5, and 7). Secondly, a supervised classification was employed, classifying the broadband albedo maps into open water, thin/bare ice, and thick/snow-covered ice using simple threshold values selected based on visual manual interpretation of the images. Thresholds used for this classification are provided in the metadata txt-file along with the data. MSS images have been pre-processed and quality assessed as much as possible to avoid artefacts from missing and/or corrupt scanlines and clouds or cloud shadows.</p>\n\n<p><strong>TableOfContents: </strong>surface type flag (100: open water, 150: thin or bare sea ice, 200: thick or snow-covered ice, 255: land, missing data, or clouds)</p>\n\n<p><strong>Technical Info:</strong> dimensions actual: variable, depends on how the Landsat scene fits into a rectangular bounding box determined by the minimum and maximum values of latitude and longitude of each scene, something around 4000 columns x 4000 rows; temporalExtent_startDate: 1974-03-11; temporalExtent_endDate: 1974-09-08; temporalResolution: ~28 s / image; spatialResolution: 60; spatialResolutionUnit: meters; horizontalResolutionXdirection: 60; horizontalResolutionXdirectionUnit: meters; horizontalResolutionYdirection: 60; horizontalResolutionYdirectionUnit: meters; verticalResolution: none; verticalResolutionUnit: none; verticalStart: none; verticalEnd: none; instrumentName: Landsat-1: Multispectral Scanner (MSS); instrumentType: optical sensor; instrumentLocation: Landsat-1; instrumentProvider: NASA</p>\n\n<p><strong>Methods:</strong> [1] ESA CCI sea ice ecv project phase 2 product validation and intercomparison report for sea-ice concentration: D4.1_SICCI_P2_PVIR-SIC_Issue_1.1.pdf (chapter 3.3); [2] Koepke, P., Removal of Atmospheric Effects from AVHRR albedos, J. Appl. Meteorol., 28, 1341-1348, 1989; [3] Chander, G., Markham, B. L., and Helder, D. L.: Summary of current radiometric calibration coefficients for Landsat MSS, TM, ETM+, and EO-1 ALI sensors. Rem. Sens. Environ. 113, 893-903, <a href=\"https://doi.10.1016/j.rse.2009.01.007\">https://doi.10.1016/j.rse.2009.01.007</a>, 2009; [4] Metadata file containing thresholds for open water - thin/bare ice and thin/bare ice - thick/snow covered ice discrimination, the sun elevation angle and the used channels for 1974: 1974_NH_settings.txt</p>\n\n<p><strong>Units: </strong>1</p>\n\n<p><strong>geoLocations:</strong></p>\n\n<ul>\n\t<li>Northern Hemisphere: westBoundLongitude: -180.0 degrees East; eastBoundLongitude: 180.0 degrees East; southBoundLatitude: 50.0 degrees North; northBoundLatitude: 90.0 degrees North; geoLocationPlace: Northern Hemisphere over water</li>\n</ul>\n\n<p><strong>Size: </strong>(files are packed into one zip-file per year)</p>\n\n<ul>\n\t<li>Northern Hemisphere: 50 files in total&nbsp; for 1974; 19.1 Gbyte (zipped: 12.0Gbyte)&nbsp;</li>\n</ul>\n\n<p><strong>Format:</strong> netCDF</p>\n\n<p><strong>DataSources:</strong> <a href=\"https://earthexplorer.usgs.gov/\">https://earthexplorer.usgs.gov/</a> [last access: 2025-09-01]</p>\n\n<p><strong>Contact:</strong> <a href=\"mailto:stefan.kern@uni-hamburg.de\">stefan.kern (at) uni-hamburg.de</a></p>","doi":"10.25592/uhhfdm.17916","keywords":["Climate Research","Polar Oceans","Sea Ice","Supervised Classification","Satellite Remote Sensing","Landsat-1 MSS","USGS","ICDC"],"language":"eng","license":{"id":"CC-BY-4.0"},"notes":"This is a data set created for the evaluation of sea-ice concentration products derived from satellite passive microwave observations.","publication_date":"2025-09-10","related_identifiers":[{"identifier":"https://earthexplorer.usgs.gov/","relation":"references","scheme":"url"},{"identifier":"10.25592/uhhfdm.17915","relation":"isVersionOf","scheme":"doi"}],"relations":{"version":[{"count":1,"index":0,"is_last":true,"last_child":{"pid_type":"recid","pid_value":"17916"},"parent":{"pid_type":"recid","pid_value":"17915"}}]},"resource_type":{"title":"Dataset","type":"dataset"},"title":"Landsat-1 Multispectral Scanner surface type over water from supervised classification of surface broadband albedo estimates","version":"2025_fv0.01"},"owners":[162],"revision":2,"updated":"2025-09-12T10:28:45.723174+00:00"}