Northern Europe ice cover since 2017/Lake Ice Extent for the Northern Europe since 2017

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Provided by Finnish Digital Agency / Population Register Centre

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Dataset information

Country of origin
Updated
Created
2022.02.01
Available languages
Finnish
Keywords
satelliittihavaintotieto, satellite-image, land-cover, lake-ice, earth-observation, jaapeite, tarkka, ei-inspire, jarvet, remote-sensing
Quality scoring
225

Dataset description

**[EN]** satellite images track the ice coverage of Northern European lakes throughout the year. There is no information on lake ice in the northernmost regions due to low light. Clouds also cover visibility to the surface of the earth. The resolution of the images is approximately 250 m x 250 m. The material consists of daily interpretations made since 2017. The daily ice coverage of lakes is produced using the material of the Terra satellite MODIS (Moderate Resolution Imaging Spectroradiometer). Järvijäj is interpreted using the reflectance ratio measured by the MODIS Instument in the near-infrared area, i.e. reflectance. In addition to this, the value of the MODIS thermal channel is used to remove possible misinterpretations during summer time, e.g. when the thick algae mat increases the reflection of the near-infrared area in the same way as ice. The material is part of SYKE’s open data (CC BY 4.0). Purpose: Monitoring of Northern Europe’s lake ice cover. *** **[En]** Satellite remote sensing is used to monitor the lake ice extent in the Northern Europe during the year. From the Northernmost areas, lake ice extent information is not available during the polar night due to the low light conditions. Clouds also obscure visibility to the earth’s surface. The resolution of the images is about 250x250 m. The dataset consists of daily products made since 2017. Lake Ice Extent daily product is calculated in the Finnish Environment Institute (SYKE) by using Terra/MODIS (Moderate Resolution Imaging Spectroradiometer) satellite images. The lake ice extent is interpreted by using the reflectance of near-infrared band by the MODIS instrument. In addition, the value of the thermal band of the MODIS is utilised to eliminate possible misinterpretations during the summer, e.g. caused by a thick algae bloom. *** **WMS server/WMS service endpoint**: https://geoserver2.ymparisto.fi/geoserver/eo/wms **WMS level/WMS layer**: EO_LIE Material has been produced since 2017 for the TARKKA service. The latest version is 1.2.2 (valid from 7 February 2021).
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