Daily surface temperature of the Baltic Sea and Finnish lakes (NOOA-AVHRR) 2004-2016/Daily surface temperature of the Baltic Sea and Finnish lakes (NOOA-AVHRR) 2004-2016

**[FI]** satellite images monitor the surface temperature of the largest lakes in the Baltic Sea and Finland in ice-free and cloud-free areas. Surface temperature is calculated from NOAA-AVHRR (National Oceanic and Atmospheric Administration — Advanced Very High Resolution Radiometer) data. The temperature has been calculated using two thermal wavelength observations using the Split Window method. The terrain separation capacity of the images is about 1x1 km. The material consists of daily interpretations from 2004-2016. The data cover the annual period April-October. In addition, individual observations from March and November are included. Surface temperature observations are made at night, when they correspond well to station observations close to the surface layer. The data shall include the days for which correct satellite data is available. The material is part of SYKE’s open data (CC BY 4.0). Purpose: Monitoring the surface temperature of lakes in the Baltic Sea and Finland. *** **[En]** Satellite observations are used to monitor the sea surface temperature (SST) in the Baltic Sea. Sea surface temperature dataset covers daily the non-cloudy ice-free sea areas and many of the largest lakes in Finland. Sea surface temperature dataset covers daily the non-cloudy areas. The dataset is based on the observations by NOAA-AVHRR (National Oceanic and Atmospheric Administration — Advanced Very High Resolution Radiometer) instrument night-time observations. Finnish Environment Institute (SYKE) has produced the dataset by using Split Window method and removed the areas covered by clouds. The spatial (ground) resolution is ~1 km x 1 km. The dataset covers years from 2004 to 2016 and annually the period from April to October. *** **WMS server/WMS service endpoint**: https://geoserver2.ymparisto.fi/geoserver/eo/wms **WMS level/WMS layer**: EO_SST *** **[EN]** Surface temperature interpretation resulting from remote sensing monitoring based on NOAA-AVHRR satellite images. Daily surface temperature data from 2004-2016. Processing history: Surface temperatures have been interpreted from NOAA/AVHRR satellite material. The original satellite data is received by the Finnish Meteorological Institute. In the heartbeat, the temperature readings are calculated. *** **[En]** Surface temperature interpretation resulting from remote sensing observations based on NOAA-AVHRR satellite images. Daily surface temperature data consisting of years 2004-2016. Processing History: Surface temperatures have been interpreted from NOAA/AVHRR satellite instrument data. The original satellite has been received by the Finnish Meteorological Institute. Temperature Interpretations have been calculated in SYKE.