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Kirstein, Inga Vanessa; Ecker, Ursula; Carstens, Kristine: Hydrochemistry at time series station Helgoland Roads, North Sea, in 2023 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.984759 (dataset in review), In: Wiltshire, Karen Helen; Carstens, Kristine; Ecker, Ursula; Kirstein, Inga Vanessa (2024): Hydrochemistry at time series station Helgoland Roads, North Sea since 1873 [dataset publication series]. Alfred Wegener Institute - Biological Institute Helgoland, PANGAEA, https://doi.org/10.1594/PANGAEA.960375

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Abstract:
In 2023, the hydrochemistry of surface water was monitored at Helgoland Roads station on every workday, typically before 9 a.m. Temperature was measured on board immediately after sampling. Visibility was measured immediately on board using a Secchi Disk. Salinity, dissolved inorganic nutrients, pH and oxygen were measured from a bucket sample in the laboratory. Further information regarding the methodology and the devices used can be found in the metadata description.
Keyword(s):
LTER; LTO
Documentation:
Metadata for the Helgoland Roads hydrochemistry, 2024 (2025). Alfred Wegener Institute - Biological Institute Helgoland, metadata_description_hydrochemistry_2024.pdf
Project(s):
Helgoland Roads long-term observations (LTO_HelgolandRoads)
Coverage:
Median Latitude: 54.184149 * Median Longitude: 7.898771 * South-bound Latitude: 54.184040 * West-bound Longitude: 7.891470 * North-bound Latitude: 54.184167 * East-bound Longitude: 7.900000
Date/Time Start: 2023-01-02T09:05:00 * Date/Time End: 2023-12-29T08:20:00
Minimum DEPTH, water: 0.0 m * Maximum DEPTH, water: 0.0 m
Event(s):
HelgolandRoads2023 (Kabeltonne) * Latitude: 54.188330 * Longitude: 7.900000 * Date/Time Start: 2023-01-01T00:00:00 * Date/Time End: 2023-12-31T23:59:59 * Elevation: -10.0 m * DEIMS ID: deims.org * O2A Registry URI: https://registry.o2a-data.de/items/8674 * Location: German Bight, North Sea * Campaign: LTER_HelgolandRoads (Kabeltonne, Long-term Ecological Research Helgoland Roads) * Basis: Marine Station Helgoland * Method/Device: Monitoring (MON)
Comment:
The photometer, with which the nutrients have been analysed, has been replaced. Until 2023-08-16 device "Spectrophotometer, Hitachi, U-1100" with link https://registry.o2a-data.de/items/12101 has been used. From 2023-08-17 onwards device "Spectrophotometer, Varian, Cary 4000" with link https://registry.o2a-data.de/items/12104 has been in use.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DATE/TIMEDate/TimeKirstein, Inga VanessaGeocode
2LATITUDELatitudeKirstein, Inga VanessaGeocode
3LONGITUDELongitudeKirstein, Inga VanessaGeocode
4DEPTH, waterDepth watermKirstein, Inga VanessaGeocode – water sample taken with bucket at water surface
5LocationLocationKirstein, Inga VanessaHR = Roads, J = Jetty, and AS = alternative Secchi station
6Depth of Secchi Diskz(SD)mKirstein, Inga VanessaSecchi disk (SD)https://registry.o2a-data.de/items/10609
7Quality flag, secchi diskQF SDKirstein, Inga VanessaArgo quality control flags according to Thierry et al. (2022)QC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing
8Temperature, waterTemp°CKirstein, Inga VanessaMercury thermometerhttps://registry.o2a-data.de/items/10607
9Quality flag, water temperatureQF water tempKirstein, Inga VanessaArgo quality control flags according to Thierry et al. (2022)QC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing; Mercury thermometer
10Temperature, waterTemp°CKirstein, Inga VanessaDigital thermometer, HANNA instruments, HI-98501https://registry.o2a-data.de/items/10608
11Quality flag, water temperatureQF water tempKirstein, Inga VanessaArgo quality control flags according to Thierry et al. (2022)QC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing; Digital thermometer
12AnalystAnalystKirstein, Inga Vanessaof Secchi disk and temperature
13SalinitySalKirstein, Inga VanessaSalinometer, Guildline Instruments, 8400B Autosalhttps://registry.o2a-data.de/items/10605
14Quality flag, salinityQF salKirstein, Inga VanessaArgo quality control flags according to Thierry et al. (2022)QC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing
15AnalystAnalystKirstein, Inga Vanessaof salinity
16SilicateSi(OH)4µmol/lKirstein, Inga VanessaSpectrophotometer, Hitachi, U-1100https://registry.o2a-data.de/items/12101
17Quality flag, silicateQF Si(OH)4Kirstein, Inga VanessaArgo quality control flags according to Thierry et al. (2022)QC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing
18Phosphate[PO4]3-µmol/lKirstein, Inga VanessaSpectrophotometer, Hitachi, U-1100https://registry.o2a-data.de/items/12101
19Quality flag, phosphateQF [PO4]3-Kirstein, Inga VanessaArgo quality control flags according to Thierry et al. (2022)QC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing
20Nitrite[NO2]-µmol/lKirstein, Inga VanessaSpectrophotometer, Hitachi, U-1100https://registry.o2a-data.de/items/12101
21Quality flag, nitriteQF [NO2]-Kirstein, Inga VanessaQC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing
22Nitrate[NO3]-µmol/lKirstein, Inga VanessaCalculated (difference of Nitrate and Nitrite and Nitrite)
23Nitrate and Nitrite[NO3]- + [NO2]-µmol/lKirstein, Inga VanessaSpectrophotometer, Hitachi, U-1100https://registry.o2a-data.de/items/12101
24Quality flag, nitrate and nitriteQF [NO3]- + [NO2]-Kirstein, Inga VanessaArgo quality control flags according to Thierry et al. (2022)QC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing
25Ammonium[NH4]+µmol/lKirstein, Inga VanessaSpectrophotometer, Hitachi, U-1100https://registry.o2a-data.de/items/12101
26Quality flag, ammoniumQF [NH4]+Kirstein, Inga VanessaArgo quality control flags according to Thierry et al. (2022)QC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing
27Nitrogen, inorganic, dissolvedDINµmol/lKirstein, Inga VanessaCalculated (sum of Nitrate, Nitrite, Ammonium)
28AnalystAnalystKirstein, Inga Vanessaof nutrient
29pHpHKirstein, Inga VanessapH meter, WTW, SenTix 940https://registry.o2a-data.de/items/11801
30Quality flag, pHQF pHKirstein, Inga VanessaArgo quality control flags according to Thierry et al. (2022)QC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing
31OxygenO2mg/lKirstein, Inga VanessaDissolved oxygen meter, WTW, FDO 925https://registry.o2a-data.de/items/11802
32Quality flag, oxygenQF O2Kirstein, Inga VanessaArgo quality control flags according to Thierry et al. (2022)QC flag meanings: 0:no QC, 1: good, 2:probably good, 3: probably bad, 4: bad, 5: changed, 8: estimated, 9: missing
33AnalystAnalystKirstein, Inga Vanessaof oxygen and pH
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 2 (ProcLevel2)
Size:
7002 data points

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