Publication Date:
2023-08-09
Description:
We investigated nutrient input and retention in the Elbe River (Germany) at the river/estuarine transition with high agricultural loads of nitrogen. Surface water samples were taken at the weir Geesthacht (stream kilometre 585, 53°25'31''N, 10°20'10''E) from 2011 to 2021. In these samples, we analyzed nutrient concentrations, nitrate dual stable isotopes and suspended particulate matter composition. Usually, samples were taken once or twice per month. Aims of the study were to investigate 1) nitrate retention in the Elbe River and catchment, 2) seasonal dynamic of nitrate stable isotopes and 3) key nitrogen turnover processes and their respective controls over a ten year period.
Keywords:
Carbon, total; Carbon/Nitrogen ratio; Continuous flow analyser (AA3, Seal Analytics, Germany); DATE/TIME; DEPTH, water; Elemental analyzer (EA), Thermo Scientific, FlashEA 1112; Element analyser, Carlo Erba NA2500, coupled with an isotope ratio mass spectrometerFinnigan MAT 252; Fluorescence measurement (OPA), with auto-analyser; Geesthacht weir, Germany; GF/F WHA1825047, Whatman, UK; GW2011-2016_Stat_1; Helmholtz-Zentrum Hereon; Hereon; Measurement as N2O using isotope-ratio mass spectrometry (IRMS). Bacterial conversion to N2O, so called Denitrifier-method (according to Sigman et al. 2001; Casciotti et al. 2002). Average of the measurement of 2 replicates; Nitrogen, total; Nitrogen in ammonium; Nitrogen in nitrate; Nitrogen in nitrite; Phosphorus in orthophosphate; Sample ID; Silicate, dissolved; Suspended particulate matter; Water sample; WS; δ15N, nitrate; δ15N, total nitrogen; δ18O, nitrate
Type:
Dataset
Format:
text/tab-separated-values, 2723 data points
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