Dataset Open Access
<?xml version='1.0' encoding='UTF-8'?> <record xmlns="http://www.loc.gov/MARC21/slim"> <leader>00000nmm##2200000uu#4500</leader> <datafield tag="542" ind1=" " ind2=" "> <subfield code="l">open</subfield> </datafield> <datafield tag="909" ind1="C" ind2="O"> <subfield code="o">oai:fdr.uni-hamburg.de:17916</subfield> <subfield code="p">user-icdc</subfield> <subfield code="p">user-cen</subfield> <subfield code="p">user-uhh</subfield> </datafield> <datafield tag="773" ind1=" " ind2=" "> <subfield code="a">https://earthexplorer.usgs.gov/</subfield> <subfield code="i">references</subfield> <subfield code="n">url</subfield> </datafield> <datafield tag="773" ind1=" " ind2=" "> <subfield code="a">10.25592/uhhfdm.17915</subfield> <subfield code="i">isVersionOf</subfield> <subfield code="n">doi</subfield> </datafield> <controlfield tag="005">20250912102845.0</controlfield> <datafield tag="540" ind1=" " ind2=" "> <subfield code="u">https://creativecommons.org/licenses/by/4.0/legalcode</subfield> <subfield code="a">Creative Commons Attribution 4.0 International</subfield> </datafield> <datafield tag="260" ind1=" " ind2=" "> <subfield code="c">2025-09-10</subfield> </datafield> <datafield tag="041" ind1=" " ind2=" "> <subfield code="a">eng</subfield> </datafield> <datafield tag="653" ind1=" " ind2=" "> <subfield code="a">Climate Research</subfield> </datafield> <datafield tag="653" ind1=" " ind2=" "> <subfield code="a">Polar Oceans</subfield> </datafield> <datafield tag="653" ind1=" " ind2=" "> <subfield code="a">Sea Ice</subfield> </datafield> <datafield tag="653" ind1=" " ind2=" "> <subfield code="a">Supervised Classification</subfield> </datafield> <datafield tag="653" ind1=" " ind2=" "> <subfield code="a">Satellite Remote Sensing</subfield> </datafield> <datafield tag="653" ind1=" " ind2=" "> <subfield code="a">Landsat-1 MSS</subfield> </datafield> <datafield tag="653" ind1=" " ind2=" "> <subfield code="a">USGS</subfield> </datafield> <datafield tag="653" ind1=" " ind2=" "> <subfield code="a">ICDC</subfield> </datafield> <datafield tag="500" ind1=" " ind2=" "> <subfield code="a">This is a data set created for the evaluation of sea-ice concentration products derived from satellite passive microwave observations.</subfield> </datafield> <datafield tag="245" ind1=" " ind2=" "> <subfield code="a">Landsat-1 Multispectral Scanner surface type over water from supervised classification of surface broadband albedo estimates</subfield> </datafield> <datafield tag="856" ind1="4" ind2=" "> <subfield code="s">5868</subfield> <subfield code="u">https://www.fdr.uni-hamburg.de/record/17916/files/1974_NH_settings.txt</subfield> <subfield code="z">md5:1d41432ea2bf18afc23f94f69273b799</subfield> </datafield> <datafield tag="856" ind1="4" ind2=" "> <subfield code="s">12041006597</subfield> <subfield code="u">https://www.fdr.uni-hamburg.de/record/17916/files/Landsat-1__SurfaceType_from_BroadBandAlbedo__NH__1974__UHAM-ICDC__fv0.01.nc.zip</subfield> <subfield code="z">md5:052997d359ff4d18d2709aef4e997fd1</subfield> </datafield> <datafield tag="856" ind1="4" ind2=" "> <subfield code="s">27912369</subfield> <subfield code="u">https://www.fdr.uni-hamburg.de/record/17916/files/SICCI_P2_PVIR-SIC_D4.1_Issue_1.1.pdf</subfield> <subfield code="z">md5:961b3d87d6c9b63ed20f45f246dd0173</subfield> </datafield> <datafield tag="650" ind1="1" ind2="7"> <subfield code="a">cc-by</subfield> <subfield code="2">opendefinition.org</subfield> </datafield> <datafield tag="520" ind1=" " ind2=" "> <subfield code="a"><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> <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> <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> <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> <p><strong>Units: </strong>1</p> <p><strong>geoLocations:</strong></p> <ul> <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> </ul> <p><strong>Size: </strong>(files are packed into one zip-file per year)</p> <ul> <li>Northern Hemisphere: 50 files in total&nbsp; for 1974; 19.1 Gbyte (zipped: 12.0Gbyte)&nbsp;</li> </ul> <p><strong>Format:</strong> netCDF</p> <p><strong>DataSources:</strong> <a href="https://earthexplorer.usgs.gov/">https://earthexplorer.usgs.gov/</a> [last access: 2025-09-01]</p> <p><strong>Contact:</strong> <a href="mailto:stefan.kern@uni-hamburg.de">stefan.kern (at) uni-hamburg.de</a></p></subfield> </datafield> <datafield tag="980" ind1=" " ind2=" "> <subfield code="a">dataset</subfield> </datafield> <datafield tag="980" ind1=" " ind2=" "> <subfield code="a">user-cen</subfield> </datafield> <datafield tag="980" ind1=" " ind2=" "> <subfield code="a">user-icdc</subfield> </datafield> <datafield tag="980" ind1=" " ind2=" "> <subfield code="a">user-uhh</subfield> </datafield> <datafield tag="700" ind1=" " ind2=" "> <subfield code="a">Sadikni, Remon</subfield> <subfield code="u">Integrated Climate Data Center (ICDC), Center for Earth System Research and Sustainability (CEN), University of Hamburg, Hamburg, Germany</subfield> <subfield code="4">cur</subfield> </datafield> <datafield tag="024" ind1=" " ind2=" "> <subfield code="a">10.25592/uhhfdm.17916</subfield> <subfield code="2">doi</subfield> </datafield> <datafield tag="100" ind1=" " ind2=" "> <subfield code="a">Kern, Stefan</subfield> <subfield code="u">Integrated Climate Data Center (ICDC), Center for Earth System Research and Sustainability (CEN), University of Hamburg, Hamburg, Germany</subfield> <subfield code="0">(orcid)0000-0001-7281-3746</subfield> </datafield> <controlfield tag="001">17916</controlfield> </record>