Dissolved oxygen, dissolved nitrous oxide, and water temperature in reservoirs. This dataset is associated with the following publication: Beaulieu , J., C. Nietch , and J. Young. Source or sink: Insight on controls of nitrous oxide biogeochemistry from a 20 reservoir survey. Journal of Geophysical Research - Biogeosciences. American Geophysical Union, Washington, DC, USA, 120(10): 1995-2010, (2015).

A comprehensive study of water quality in two streams was conducted in the Midwestern United States in 1999 to 2003. The Iroquois River and Sugar Creek, located in northwestern Indiana and northeastern Illinois have been heavily impacted by agricultural land use and contain relatively high concentrations of inorganic nitrogen, primarily as nitrate. As part of that study, samples were collected and analyzed for dissolved methane and nitrous oxide concentrations to determine greenhouse gas (GHG) concentrations in the streams and the relation of GHG concentrations to concentrations of other inorganic nitrogen species in the water. These data are the results of that study. The data include GHG and nutrient samples collected on a biweekly basis at one sampling station on each stream from 1999 to 2002, Lagrangian and synoptic sampling events conducted along several kilometer-long reaches of each stream 1999 to 2002, and diel sampling conducted in Sugar Creek at two different locations in 2003.

This dataset provides modeled estimates of annual nitrous oxide (N2O) emissions at a coarse geographic scale (0.5 x 0.5 degree) for two sets of global rivers and streams covering the period of 1900-2016. Emissions (g N2O-N/yr) are provided for higher-order rivers and streams (>=4th order) and headwater streams (<4th order). The estimates were derived from a water transport model, the Model for Scale Adaptive River Transport (MOSART), coupled with the Dynamic Land Ecosystem Model (DLEM) to link hydrology and ecosystem processes pertaining to N2O flux and transport. Factors driving the model included climate, land use and land cover, and nitrogen inputs (i.e., fertilizer, deposition, manure, and sewage). Nitrogen discharges from streams and rivers to the ocean were calibrated from observations from 50 river basins across the globe.

This data package was created 2024-10-17 09:01:30 by NPSTORET and includes selected project, location, and result data. Data contained in the Niobrara National Scenic River NPSTORET back-end file (NIOB_NPSTORET_BE_20231113_20231115_1341.ACCDB) were filtered to include: Organization: - NIOB: Niobrara National Scenic River Project: - NIOB0001: Niobrara River Water Quality & Streamflow Monitoring Program Station: - Include Trip QC And All Station Visit Results Value Status: - Accepted or Certified (exported as Final) or Final The data package is organized into five data tables: - Projects.csv - describes the purpose and background of the monitoring efforts - Locations.csv - documents the attributes of the monitoring locations/stations - Results.csv - contains the field measurements, observations, and/or lab analyses for each sample/event/data grouping - HUC.csv - enumerates the domain of allowed values for 8-digit and 12-digit hydrologic unit codes utilized by the Locations datatable - Characteristics.csv - enumerates the domain of characteristics available in NPSTORET to identify what was sampled, measured or observed in Results Period of record for filtered data is 2001-12-19 to 2023-10-06. This data package is a snapshot in time of one National Park Service project. The most current data for this project, which may be more or less extensive than that in this data package, can be found on the Water Quality Portal at: https://www.waterqualitydata.us/data/Result/search?project=NIOB0001

This data package was created 2024-03-12 06:32:27 by NPSTORET and includes selected project, location, and result data. Data contained in the Niobrara National Scenic River NPSTORET back-end file (NIOB_NPSTORET_BE_20231113_20231115_1341.ACCDB) were filtered to include: Organization: - NIOB: Niobrara National Scenic River Project: - NIOB0001: Niobrara River Water Quality & Streamflow Monitoring Program Station: - Include Trip QC And All Station Visit Results Value Status: - Accepted or Certified (exported as Final) or Final The data package is organized into four data tables: - Projects.csv - describes the purpose and background of the monitoring efforts - Locations.csv - documents the attributes of the monitoring locations/stations - Results.csv - contains the field measurements, observations, and/or lab analyses for each sample/event/data grouping - HUC12.csv - enumerates the domain of allowed values for 12-digit hydrologic unit codes utilized by the Locations datatable Period of record for filtered data is 2001-12-19 to 2023-10-06. This data package is a snapshot in time of one National Park Service project. The most current data for this project, which may be more or less extensive than that in this data package, can be found on the Water Quality Portal at: https://www.waterqualitydata.us/data/Result/search?project=NIOB0001

This data package was created 2024-10-17 09:01:30 by NPSTORET and includes selected project, location, and result data. Data contained in the Niobrara National Scenic River NPSTORET back-end file (NIOB_NPSTORET_BE_20231113_20231115_1341.ACCDB) were filtered to include: Organization: - NIOB: Niobrara National Scenic River Project: - NIOB0001: Niobrara River Water Quality & Streamflow Monitoring Program Station: - Include Trip QC And All Station Visit Results Value Status: - Accepted or Certified (exported as Final) or Final The data package is organized into five data tables: - Projects.csv - describes the purpose and background of the monitoring efforts - Locations.csv - documents the attributes of the monitoring locations/stations - Results.csv - contains the field measurements, observations, and/or lab analyses for each sample/event/data grouping - HUC.csv - enumerates the domain of allowed values for 8-digit and 12-digit hydrologic unit codes utilized by the Locations datatable - Characteristics.csv - enumerates the domain of characteristics available in NPSTORET to identify what was sampled, measured or observed in Results Period of record for filtered data is 2001-12-19 to 2023-10-06. This data package is a snapshot in time of one National Park Service project. The most current data for this project, which may be more or less extensive than that in this data package, can be found on the Water Quality Portal at: https://www.waterqualitydata.us/data/Result/search?project=NIOB0001

Dissolved nitrous oxide concentrations in 984 U.S. lakes. This dataset is not publicly accessible because: It is too large to be uploaded. It can be accessed through the following means: https://github.com/USEPA/DissolvedGasNla. Format: Data files in in .csv and .rda format. Metadata are captured in script (.Rmd) files.

This dataset contains methane and carbon dioxide emission rates measured in 32 reservoirs distributed across Ohio, Kentucky, and Indiana. Ancillary environmental data including reservoir morphology, watershed characteristics, and water chemistry are also included. This dataset is associated with the following publication: Beaulieu, J., S. Waldo, D. Balz, W. Barnett, A. Hall, M. Platz, and K. White. Methane and carbon dioxide emissions from reservoirs: Controls and Upscaling. Journal of Geophysical Research - Biogeosciences. American Geophysical Union, Washington, DC, USA, 125(12): e2019JG005474, (2020).