Tuomela, Nea; Elovaara, Samu; Kaartokallio, Hermanni; Hultman, Jenni; Thomas, David N (2025): Degradation experiment on water samples collected from Kevo, Utsjoki region in Finland during June 2023 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.981159, In: Tuomela, N et al. (2025): Dissolved organic matter properties and processing in a small arctic catchment with peatland and palsa features [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.981156
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Published: 2025-08-04 • DOI registered: 2025-09-02
Abstract:
This table contains measurements collected during a biodegradation experiment that was initiated immediately after collecting the samples and terminated approximately 6 months later. Some samples were filtered through a 0.8 µm membrane filter, as shown by the filter pore size parameter, to remove grazers. The experiment was conducted in the dark at 10 °C. Samples were stored in 500 mL glass bottles that were stirred regularly, except dissolved oxygen samples for respiration measurements, which were stored in separate glass stopper vials. The date time recordings within each event show the initial measurement and subsequent measurements of that sample. Other data represent direct measurements at the given time, but respiration shows the daily oxygen consumption between the initial measurement at the start of the experiment and the next measurement after approximately two weeks.
Funding:
Coverage:
Median Latitude: 69.802432 * Median Longitude: 27.089823 * South-bound Latitude: 69.759145 * West-bound Longitude: 27.006499 * North-bound Latitude: 69.821909 * East-bound Longitude: 27.167357
Date/Time Start: 2023-06-16T00:00:00 * Date/Time End: 2023-06-20T00:00:00
Minimum DEPTH, water: 0.3 m * Maximum DEPTH, water: 0.3 m
Event(s):
Kevo_1 (1) * Latitude: 69.784368 * Longitude: 27.019484 * Date/Time: 2023-06-16T00:00:00 * Location: Utsjoki, Finland * Method/Device: Water sample (WS)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Type of study | Study type | Tuomela, Nea | |||
| 2 | Event label | Event | Tuomela, Nea | |||
| 3 | Latitude of event | Latitude | Tuomela, Nea | |||
| 4 | Longitude of event | Longitude | Tuomela, Nea | |||
| 5 | Date/Time of event | Date/Time | Tuomela, Nea | |||
| 6 | DEPTH, water | Depth water | m | Tuomela, Nea | Geocode – approximate sampling depth, water collected directly into the bottle from below the water surface | |
| 7 | Filter, pore size | Filter pore size | µm | Tuomela, Nea | ||
| 8 | Comment | Comment | Tuomela, Nea | Filter | ||
| 9 | Date/Time local | Date/Time local | Tuomela, Nea | |||
| 10 | Absorption coefficient, 254 nm | ac254 | 1/m | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 11 | Absorption coefficient, 275 nm | ac275 | 1/m | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 12 | Absorption coefficient, 295 nm | ac295 | 1/m | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 13 | Absorption coefficient, 300 nm | ac300 | 1/m | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 14 | Absorption coefficient, 350 nm | ac350 | 1/m | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 15 | Absorption coefficient, 375 nm | ac375 | 1/m | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 16 | Absorption coefficient, 400 nm | ac400 | 1/m | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 17 | Absorption coefficient, 440 nm | ac440 | 1/m | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 18 | Spectral slope, 275-295 nm | SpSl 275-295 nm | 1/µm | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 19 | Spectral slope, 350-400 nm | SpSl 350-400 nm | 1/µm | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 20 | Spectral slope, 300-650 nm | SpSl 300-650 nm | 1/µm | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | |
| 21 | Slope ratio | SR | Tuomela, Nea | Spectrophotometer, Shimadzu Corporation, UV 2401PC | ||
| 22 | Fluorescence, peak T | F peak T | RU | Tuomela, Nea | Spectrophotometer, Agilent, Varian Cary Eclipse | |
| 23 | Fluorescence, peak A | F peak A | RU | Tuomela, Nea | Spectrophotometer, Agilent, Varian Cary Eclipse | |
| 24 | Fluorescence, peak M | F peak M | RU | Tuomela, Nea | Spectrophotometer, Agilent, Varian Cary Eclipse | |
| 25 | Fluorescence, peak C | F peak C | RU | Tuomela, Nea | Spectrophotometer, Agilent, Varian Cary Eclipse | |
| 26 | Fluorescence index | FI | Tuomela, Nea | Spectrophotometer, Agilent, Varian Cary Eclipse | ||
| 27 | Humification index | HIX | Tuomela, Nea | Spectrophotometer, Agilent, Varian Cary Eclipse | ||
| 28 | Biological index | BIX | Tuomela, Nea | Spectrophotometer, Agilent, Varian Cary Eclipse | ||
| 29 | High nucleic acid bacteria | HNA | #/ml | Tuomela, Nea | BD LSR FORTESSA Flow Cytometer | |
| 30 | Low nucleic acid bacteria | LNA | #/ml | Tuomela, Nea | BD LSR FORTESSA Flow Cytometer | |
| 31 | Nitrate | [NO3]- | µmol/l | Tuomela, Nea | Segmented Flow Analyzer, SEAL Analytical, SEAL AA500 | |
| 32 | Nitrite | [NO2]- | µmol/l | Tuomela, Nea | Segmented Flow Analyzer, SEAL Analytical, SEAL AA500 | |
| 33 | Phosphate | [PO4]3- | µmol/l | Tuomela, Nea | Segmented Flow Analyzer, SEAL Analytical, SEAL AA500 | |
| 34 | Silicate | Si(OH)4 | µmol/l | Tuomela, Nea | Segmented Flow Analyzer, SEAL Analytical, SEAL AA500 | |
| 35 | Nitrogen, total dissolved | TDN | µmol/l | Tuomela, Nea | Segmented Flow Analyzer, SEAL Analytical, SEAL AA500 | |
| 36 | Ammonium | [NH4]+ | µmol/l | Tuomela, Nea | Spectrophotometer, Agilent, Varian Cary Eclipse | |
| 37 | Respiration rate, oxygen | Resp O2 | µmol/l/day | Tuomela, Nea |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2432 data points
Download Data
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