Column;Explanation;Unit Dataset: GPPz rates;NA;NA Lake;Lake name;NA Depth;Depth in watercolumn at which GPPz rate is measured;m Date;Date the GPPz rate is measured;YYYYMMDD Layer volume;Layer volume of lakewater of the interval between mention depth untill the next interval or lake bottom;L PP;GPPz rate;mg C·m-3· day-1 Temperature;Temperature at the depth on which GPPz rate is measured;°C SD;Standard deviation of GPPz rate at depth;% Replication;Type of replication. a= triplicates b= duplicates;NA a=triplicates;; b=duplicates;; Dataset: GPP lake-average;; Lake;Lake name;NA Biome;Biome name;NA Lat.;Latitude;Decimal degrees Long.;Longitude;Decimal degrees Altitude;Altitude of the location of the lake;m a.s.l. pH;Alkalinity;NA Strat.;"Stratification of lake; Y=Yes, N=No";NA GPPz,max;Maximum GPPz rate measured over the watercolumn;mg C·m-3· day-1 GPPlake-average;GPP lake average measured using bathymetry-weighted layer volumes;mg C·m-2· day-1 DOC;Dissolved organic carbon;mg·L-1 DIC;Dissolved inorganic carbon;mg·L-1 CO2;carbondioxide in lake water;mg·L-1 TN;Total nitrogen;µg·L-1 TP;Total phosphorus;µg·L-1 PAR;Photosynthetically active radiance, daily incoming-;W·m-² Kd;Light attenutation coefficient;m-1 Twater;Water temperature at 0.2m depth;°C Tair;Air temperature, monthly average before sampling date;°C Internal warming;Twater - Tair;°C Area;Lake surface area;hectare zmax;Maximum lake depth;m zavg;Average lake depth;m All data are given as calculated means if several measurements were taken. NA= non available;;