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Found 147 datasets matching "NH4 (ammonia nitrogen)".

#1 Federal
Chemical, physical, and other data collected in the coastal waters of California as part of the California Cooperative Fisheries Investigation (CalCOFI) project since 1949
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2025-05-29T00:00:00.000+00:00
This collection includes data collected from multiple platforms in the coastal waters of California over many years, as part of the California Cooperative Fisheries Investigation (CalCOFI)...
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Search relevance: 73.74 | Views last month: 0
#2 Federal
Need for Improved Monitoring of Spatial and Temporal Trends of Reduced Nitrogen
- Organization: U.S. Environmental Protection Agency
- Updated: 2020-04-03
Data in Figure 1 are from publicly available databases including county-level ammonia (NH3) emissions from the US EPA National Emissions Inventory...
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Search relevance: 63.81 | Views last month: 0
#3 Federal
Water and gas chemistry data from wells and hot springs in the Western USA, 1930 – 2006
- Organization: Department of the Interior
- Updated: 2024-03-13T00:00:00Z
Historical water and gas chemistry data from geothermal areas are important for detecting long-term patterns, informing geothermal energy exploration, development, and use, and for contextualizing...
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Search relevance: 50.35 | Views last month: 0
#4 Federal
Mid-Atlantic Coastal Wetlands Assessment data from Tinicum Marsh from 2015-10-01 to 2018-03-31 (NCEI Accession 0173477)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2018-07-30T00:00:00.000+00:00
This dataset contains comprehensive data from the Mid-Atlantic Coastal Wetlands Assessment are provided for continued monitoring of the largest freshwater tidal wetland in Pennsylvania with...
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Search relevance: 35.17 | Views last month: 0
#5 Federal
Synthesizing the Impacts of Ocean Acidification on Coral Reef Ecosystem Goods and Services for Future Vulnerability Assessments using an Atlantis Ecosystem Model from 2020-01-01 to 2020-12-31 (NCEI Accession 0300557)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2025-01-23T00:00:00.000+00:00
The files described here are the Main Hawaiian Islands (MHI) Atlantis Ecosystem model input files used in for testing CMIP6 climate scenarios developed by main Hawaiian Islands ROMS. These input...
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Search relevance: 34.75 | Views last month: 0
#6 Federal
Nitrate reduction rates and soil/ water chemistry from roadside ditches in the Mobile Bay (AL, USA) region (2018-05-23 to 2018-06-08) (NCEI Accession 0211099)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2020-07-15T00:00:00.000+00:00
Ninety-six roadside ditches spanning three landuse types in the Mobile Bay (Alabama, USA) region were sampled in May-June of 2018. Isotope pairing was used to measure nitrate reduction rates...
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Search relevance: 33.42 | Views last month: 0
#7 Federal
Nitrogen content and delta N-15 of marine algae and associated waters of Maui, Hawaii, from 2012-07-28 to 2014-04-01 (NCEI Accession 0156294)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2016-08-12T00:00:00.000+00:00
This dataset includes nutrient data related to algal and water samples collected between 2012 and 2014 on Maui, Hawaii, as part of the University of Hawaii SeaGrant Project R/HE-17. Algal tissue...
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Search relevance: 32.70 | Views last month: 0
#8 Federal
Submarine groundwater discharge at Kahana Bay, Oahu, 1997-2001: in situ CTD and water chemistry tracer data (NCEI Accession 0011399)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2006-12-13T00:00:00.000+00:00
Submarine groundwater discharge (SGD) is neither well understood nor commonly investigated in Hawaii, but it is recognized as a potential pollution source to coastal environments. Between 1997 and...
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Search relevance: 31.12 | Views last month: 1
#9 Federal
Water and sediment chemistry, and elemental (C/N ratios) and isotopic (delta 13C, delta 15N) data collected aboard R/V Endeavor cruise EN510 in the Gulf of Mexico from 2012-06-27 to 2012-07-04 (NCEI Accession 0205623)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2019-10-22T00:00:00.000+00:00
This dataset contains water and sediment chemistry, and elemental (total C and N, C/N ratio) and isotopic (delta 13C, delta 15N) data collected during R/V Endeavor cruise EN510 in the northern...
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Search relevance: 29.19 | Views last month: 0
#10 Federal
Surface water and shallow groundwater geochemistry and radium isotopes measured from land-based sampling in coastal Georgia, USA from 2001-07-26 to 2010-09-28 (NCEI Accession 0208686)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2020-07-21T00:00:00.000+00:00
Surface water and groundwater radium activities, concentrations of various dissolved materials, and environmental parameters (water temperature, salinity, and pH). Activities of 228Ra, 226Ra,...
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Search relevance: 28.79 | Views last month: 0
#11 Federal
Water and sediment chemistry, and elemental (C/N ratios) and isotopic (delta 13C, delta 15N) data collected aboard R/V Endeavor cruise EN509 in the Gulf of Mexico from 2012-05-26 to 2012-06-19 (NCEI Accession 0205197)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2019-10-21T00:00:00.000+00:00
This dataset contains water and sediment chemistry, and elemental (total C and N, C/N ratio) and isotopic (delta 13C, delta 15N) data collected during R/V Endeavor cruise EN509 in the northern...
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Search relevance: 28.38 | Views last month: 0
#12 Federal
Sediment and porewater nitrification and organic matter data in a Northern Gulf of Mexico marsh from 2021-05-26 to 2022-05-21 (NCEI Accession 0301084)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2025-02-05T00:00:00.000+00:00
We conducted a year-long study with the main objective of comparing denitrification, anammox, and dissimilatory nitrate reduction to ammonium (DNRA) across three different vegetation zones...
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Search relevance: 27.66 | Views last month: 0
#13 Federal
Macro-algae Biomass and Cover from Nearshore Regions of the Natatorium War Memorial, Waikiki, Oahu, Hawaii 1966-2005 (NODC Accession 0040082)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2021-01-06T00:00:00.000+00:00
The Department of Zoology, University of Hawaii at Manoa, incorporated surveys of macro-algae as part of the Zoology 439L "Laboratory in Ecology" during annual field experiments 1970-2005....
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Search relevance: 27.36 | Views last month: 0
#14 Federal
GLOBEC NEP Rosette Bottle Data (2002)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2022-08-30T00:00:00.000+00:00
GLOBEC (GLOBal Ocean ECosystems Dynamics) NEP (Northeast Pacific) Rosette Bottle Data from New Horizon Cruise (NH0207: 1-19 August 2002). Notes: Physical data processed by Jane Fleischbein...
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Search relevance: 27.00 | Views last month: 1
#15 Federal
WATER TEMPERATURE and Other Data from A. AGASSIZ and Other Platforms from 1964-04-01 to 1964-11-01 (NCEI Accession 6800326)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2020-04-05T00:00:00.000+00:00
No description was provided.
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Search relevance: 26.62 | Views last month: 0
#16 Federal
Water quality surveys in Culebra: comprehensive assessment of inorganic nutrient concentrations 2023-05-03 to 2024-05-21 (NCEI Accession 0306499)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2025-11-04T00:00:00.000+00:00
This record describes water quality inorganic nutrient concentration metrics collected monthly between May 2023 to May 2024 to provide reference data of nearshore and watershed water quality on...
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Search relevance: 26.45 | Views last month: 0
#17 Federal
WATER TEMPERATURE and Other Data from AMBARIAKA from 1963-12-17 to 1964-03-27 (NCEI Accession 7100085)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2020-04-06T00:00:00.000+00:00
No description was provided.
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Search relevance: 26.24 | Views last month: 0
#18 Federal
Nutrients, sedimentation and total suspended solids in the St. Thomas East End Reserves in the Caribbean Sea from 2012-01-16 to 2013-11-25 (NCEI Accession 0139480)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2016-01-15T00:00:00.000+00:00
This data set contains the results from monitoring in the St. Thomas East End Reserves (STEER) in St. Thomas, USVI, from January 2012 to November 2013. The monitoring was conducted by project...
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Search relevance: 25.82 | Views last month: 0
#19 Federal
Seagrass density and biomass, and related data from seagrass monitoring station LM-151 in Laguna Madre Texas from 1989-03-24 to 2022-06-23 (NCEI Accession 0282643)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2023-09-13T00:00:00.000+00:00
This dataset contains raw sampling data beginning in 1989 for a long-term environmental and seagrass monitoring station in Laguna Madre (“LM-151”). This project served to understand environmental...
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Search relevance: 25.41 | Views last month: 0
#20 Federal
WATER TEMPERATURE and Other Data (NCEI Accession 9400202)
- Organization: National Oceanic and Atmospheric Administration, Department of Commerce
- Updated: 2013-03-19T00:00:00.000+00:00
No description was provided.
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Search relevance: 24.90 | Views last month: 0

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