Dataset for: Diurnal patterns in solute concentrations measured with in situ UV-Vis sensors: natural fluctuations or artefacts?

This dataset contains high-resolution (10-minute interval) data for nitrate, dissolved organic carbon, precipitation and discharge at four measurement stations (NF, SHA, TTP, OUT) in the South West Mau, Kenya. This data was used for the analysis of diurnal patterns in nitrate and dissolved organic carbon concentrations. The zipped folder contains the following files and data:

• Calibration.csv:
  • site = name of measuring site
  • date = date and time of grab sample (yyyy-mm-dd hh:mm:ss)
  • DOC = dissolved organic carbon concentration in grab sample (mg C/L)
  • nitrate = nitrate concenctration in grab sample (mg N/L)
• Files with suffix ".ts.csv" (time series data from 1-11-2014 to 31-10-2019; prefix indicates measuring site):
  • date = date and time of measurement (yyyy-mm-dd hh:mm:ss)
  • nit.raw = nitrate concentration measured by sensor (mg N/L)
  • nit.flag = indication of validity of nitrate measurement (if NA, measurement is valid; for explanation of flags, see supplement of Jacobs et al. 2018)
  • nit.proc = processed nitrate concentration (mg N/L)
  • nit.bg = background concentration of nitrate (48-h moving median; mg N/L)
  • nit.patt = deviation from background concentration of nitrate (nit.proc minus nit.bg; mg N/L)
  • doc.raw = dissolved organic carbon concentration measured by sensor (mg C/L)
  • doc.flag = indication of validity of dissolved organic carbon measurement (if NA, measurement is valid)
  • doc.proc = processed dissolved organic carbon concentration (mg C/L)
  • doc.bg = background concentration of dissolved organic carbon (48-h moving median; mg C/L)
  • doc.patt = deviation from background concentration of dissolved organic carbon (doc.proc minus doc.bg; mg C/L)
  • p = precipitation (mm/10 mins)
  • q = discharge (m³/s)
  • sensor = serial number of sensor
• Files with suffix ".exp.csv" (data for sensor comparison experiment from 5-9-2017 to 1-12-2017; prefix indicates measuring site):
  • date = date and time of measurement (yyyy-mm-dd hh:mm:ss)
  • prec = precipitation (mm/10 mins)
  • nit.orig = processed nitrate concentration measured by fixed sensor (mg N/L)
  • nit.bg.orig = background concentration of nitrate measured by fixed sensor (48-h moving median; mg N/L)
  • nit.patt.orig = deviation from background concentration of nitrate measured by fixed sensor (nit.orig minus nit.bg.orig; mg N/L)
  • nit.dup = processed nitrate concentration measured by mobile sensor (mg N/L)
  • nit.bg.dup = background concentration of nitrate measured by mobile sensor (48-h moving median; mg N/L)
  • nit.patt.dup = deviation from background concentration of nitrate measured by mobile sensor (nit.dup minus nit.bg.dup; mg N/L)
  • doc.orig = processed dissolved organic carbon concentration measured by fixed sensor (mg C/L)
  • doc.bg.orig = background concentration of dissolved organic carbonmeasured by fixed sensor (48-h moving median; mg C/L)
  • doc.patt.orig = deviation from background concentration of dissolved organic carbonmeasured by fixed sensor (doc.orig minus doc.bg.orig; mg C/L)
  • doc.dup = processed dissolved organic carbonconcentration measured by mobile sensor (mg C/L)
  • doc.bg.dup = background concentration of dissolved organic carbonmeasured by mobile sensor (48-h moving median; mg C/L)
  • doc.patt.dup = deviation from background concentration of dissolved organic carbon measured by mobile sensor (doc.dup minus doc.bg.dup; mg C/L)
  • set = experimental treatment