Title: High-frequency monitoring of dissolved organic carbon exports, stream discharge and water table depth in a peatland-dominated boreal catchment, Minganie, Quebec, Canada [dataset bundled publication]
Citation: Prijac, Antonin (2023): High-frequency monitoring of dissolved organic carbon exports, stream discharge and water table depth in a peatland-dominated boreal catchment, Minganie, Quebec, Canada [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.959045
Study Site: Minganie, Quebec
Purpose: The magnitudes of dissolved organic carbon (DOC) exports from boreal peatlands to streams through lateral subsurface flow vary during the ice-free season. Peatland water table depth and the alternation of low and high flow in peat-draining streams are thought to drive this DOC export
variability. However, calculation of the specific DOC exports from a peatland can be challenging considering the multiple potential DOC sources within the catchment. A calculation approach based on the hydrological connectivity between the peat and the stream could help to solve this issue, which is the approach used in the present research.
Abstract: The data set present high-frequency data (1h-step) collected at the outlet of a 3 km length stream which flows through a boreal headwater catchment of 2.22 kilometer square and covered at 76% by an ombrotrophic dome-shaped peatland. The data set covered a period from June 2018 to May 2020. The measured parameters included physico-chemical parameters measured by an EXO2 multiparameter probe (YSI, USA) installed in the stream, at the outlet of the catchment. This multiparameter probe measured among other parameters (e.g., water temperature, pH, specific conductivity and dissolved oxygen saturation) the fluorescent dissolved organic matter (fDOM) which was used as a proxy of dissolved organic carbon (DOC) and a calibration was performed in order to determined the relashionship f(fDOM) = DOC. A hidden markov model was applied to this data set to decompose times series into low flow and high flow conditions. This was used to calculate specific DOC exports during those periods. Specific flood periods were isolated and specific indices were calculated for those periods. In addition, the stream discharge was mesured at the same site using a ultrasonic distance sensor (SR50, Campbell, USA) [from June 2018 to May 2019] and a water-level logger (U201-04, Hobo, Onset, USA) [from June 2019 to May 2020]. In the peatland area, the water table depth and the porewater temperature were measured hourly using a U20-001-04 water level logger (Hobo, Onset, USA) [2018] and a a U20l-04 water level logger (Hobo, Onset, USA) [2019] and the precipitation and air temperature were measured using a a tilting bucket rain gauge (Onset, 0.2 mm).
Supplemental Information Summary: Documentation:
Prijac, Antonin (2023): Synthesis of sampling events from peatland-dominated boreal catchment, Minganie, Quebec, Canada [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.959039
Research:
Further Info: Prijac, Antonin; Gandois, Laure; Taillardat, Pierre; Bourgault, Marc-André; Riahi, Khawla; Ponçot, Alex; Tremblay, Alain; Garneau, Michelle (2023): Hydrological connectivity controls dissolved organic carbon exports in a peatland-dominated boreal catchment stream. Preprint hess-2022-426, Hydrology and Earth System Sciences Discussions, https://doi.org/10.5194/hess-2022-426
Status: Complete
Keywords:
hydrology,
dissolved organic carbon,
Dissolved organic matter,
Geographical coordinates: North: 50.55, South: 50.52 East: -63.20 West: -63.67
Bounding Temporal Extent: Start Date: 2018-06-14, End
Date: 2020-05-31
