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#1 Federal

Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Normalized Atmospheric Deposition for 2002, Ammonium (NH4)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This tabular data set represents the average normalized (wet) deposition, in kilograms per square kilometer multiplied by 100, of ammonium (NH4) for the year 2002 compiled for every MRB_E2RF1...

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Search relevance: 90.61 | Views last month: 1 | Catalog Last Checked: May 05, 2026 at 10:06 PM

#2 Federal

Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Normalized Atmospheric Deposition for 2002, Ammonium (NH4)

Organization: Department of the Interior
Dataset Last Updated: November 17, 2020 at 12:00 AM

This data set represents the average normalized atmospheric (wet) deposition, in kilograms, of Ammonium (NH4) for the year 2002 compiled for every catchment of NHDPlus for the conterminous...

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Search relevance: 84.03 | Views last month: 2 | Catalog Last Checked: June 09, 2026 at 11:13 PM

#3 Federal

TROPESS Chemical Reanalysis Aerosol NH4 Monthly 3-dimensional Product V1 (TRPSCRAERNH4M3D) at GES DISC

Organization: National Aeronautics and Space Administration
Dataset Last Updated: June 08, 2026

The TROPESS Chemical Reanalysis Surface Aerosol NH4 Monthly 3-dimensional Product contains vertical concentrations of ammonium aerosols. The data are part of the Tropospheric Chemical Reanalysis...

Search relevance: 83.21 | Views last month: 2 | Catalog Last Checked: June 09, 2026 at 08:38 PM

#4 Federal

TROPESS Chemical Reanalysis Surface Aerosol NH4 2-Hourly 2-dimensional Product V1 (TRPSCRAERNH42H2D) at GES DISC

Organization: National Aeronautics and Space Administration
Dataset Last Updated: June 08, 2026

The TROPESS Chemical Reanalysis Surface Aerosol NH4 2-Hourly 2-dimensional Product contains surface concentrations of ammonium aerosols. The data are part of the Tropospheric Chemical Reanalysis...

Search relevance: 78.59 | Views last month: 3 | Catalog Last Checked: June 09, 2026 at 08:38 PM

#5 Federal

TROPESS Chemical Reanalysis Aerosol NH4 6-Hourly 3-dimensional Product V1 (TRPSCRAERNH46H3D) at GES DISC

Organization: National Aeronautics and Space Administration
Dataset Last Updated: June 08, 2026

The TROPESS Chemical Reanalysis Surface Aerosol NH4 6-Hourly 3-dimensional Product contains vertical concentrations of ammonium aerosols. The data are part of the Tropospheric Chemical Reanalysis...

Search relevance: 76.24 | Views last month: 4 | Catalog Last Checked: June 09, 2026 at 08:59 PM

#6 Federal

Annual Mean PM2.5 Components (EC, NH4, NO3, OC, SO4) 50m Urban and 1km Non-Urban Area Grids for Contiguous U.S., 2000-2019 v1

Organization: National Aeronautics and Space Administration
Dataset Last Updated: July 17, 2025

The Annual Mean PM2.5 Components (EC, NH4, NO3, OC, SO4) 50m Urban and 1km Non-Urban Area Grids for Contiguous U.S., 2000-2019, v1 data set contains annual predictions of the chemical...

Search relevance: 61.19 | Views last month: 2 | Catalog Last Checked: August 03, 2025 at 09:13 PM

#7 Federal

Annual Mean PM2.5 Components (EC, NH4, NO3, OC, SO4) 50m Urban and 1km Non-Urban Area Grids for Contiguous U.S., 2000-2019 v1

Organization: National Aeronautics and Space Administration
Dataset Last Updated: June 08, 2026

The Annual Mean PM2.5 Components (EC, NH4, NO3, OC, SO4) 50m Urban and 1km Non-Urban Area Grids for Contiguous U.S., 2000-2019, v1 data set contains annual predictions of the chemical...

Search relevance: 57.35 | Views last month: 0 | Catalog Last Checked: June 09, 2026 at 08:30 PM

#8 Federal

Experimental evaluation of nutrient and disease treatment effects on Acropora cervicornis (NCEI Accession 0299892)

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: December 20, 2024 at 12:00 AM

Acropora cervicornis fragments of each genotype were evenly and haphazardly assigned to two nutrient treatments: ambient nutrients (Ambient) or elevated ammonium (NH4). Each nutrient treatment...

Search relevance: 52.95 | Views last month: 2 | Catalog Last Checked: May 29, 2026 at 08:29 PM

#9 Federal

NOAA/WDS Paleoclimatology - GRIP Ice Core 248 KYr H2O2, HCHO, NH4+ and Ca2+ Data

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: November 30, 1997 at 12:00 AM

This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI...

Search relevance: 51.73 | Views last month: 3 | Catalog Last Checked: May 06, 2026 at 03:22 PM

#10 Federal

Hydrographic and Chemical Data Obtained During the R/V Meteor cruise M107 (EXPOCODE 06M320140530) in the Atlantic Ocean from 2014-05-30 to 2014-07-03 (NCEI Accession 0170851)

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: March 06, 2018 at 12:00 AM

This dataset includes profile discrete measurements of temperature, salinity, oxygen, nutrients and NH4 obtained during the R/V Meteor cruise M107 (EXPOCODE 06M320140530) in the Atlantic Ocean...

Search relevance: 42.11 | Views last month: 3 | Catalog Last Checked: May 29, 2026 at 07:21 PM

#11 Federal

Cruise report for data on water temperature, salinity, currents, and spreadsheet of marine chemistry data taken from the research vessel XIANG YANG HONG 03 in the US EEZ in the North central Pacific Ocean from 2019-09-02 to 2019-09-12 (NCEI Accession 0276895)

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: March 16, 2023 at 12:00 AM

This dataset contains the cruise report (PDF) and spreadsheet of marine chemistry data of the summer multidisciplinary investigation of marine environment in the North central Pacific Ocean...

Search relevance: 40.99 | Views last month: 0 | Catalog Last Checked: May 29, 2026 at 08:08 PM

#12 Federal

Temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from PROFESSOR KHROMOV in the North Pacific Ocean and Sea of Okhotsk from 1999-08-27 to 1999-09-28 (NCEI Accession 0157466)

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: December 11, 2016 at 12:00 AM

This dataset includes chemical, discrete sample, physical and profile data collected from PROFESSOR KHROMOV in the North Pacific Ocean and Sea of Okhotsk from 1999-08-27 to 1999-09-28. These data...

Search relevance: 40.79 | Views last month: 1 | Catalog Last Checked: May 29, 2026 at 07:12 PM

#13 Federal

Nutrients, transient tracers, and other variables collected from profile and discrete sampling observations using Niskin bottle, CTD and other instruments in the Arctic Ocean from 2005-05-02 to 2009-05-18 (NCEI Accession 0117695)

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: April 22, 2014 at 12:00 AM

This dataset includes discrete CTD profile data collected from aircraft lending expeditions in the Arctic Ocean from 2005-05-02 to 2009-05-18. All expeditions are combined with EXPOCODE...

Search relevance: 39.35 | Views last month: 6 | Catalog Last Checked: May 29, 2026 at 06:55 PM

#14 Federal

PH, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from JAMES CLARK ROSS in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2015-12-17 to 2016-01-13 (NCEI Accession 0157011)

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: November 21, 2016 at 12:00 AM

This dataset includes chemical, discrete sample, physical and profile data collected from JAMES CLARK ROSS in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans (> 60 degrees South)...

Search relevance: 38.91 | Views last month: 2 | Catalog Last Checked: May 29, 2026 at 07:07 PM

#15 Federal

NRSA data 2000-2014 Deposition Largest N Source Lin et al.

Organization: U.S. Environmental Protection Agency
Dataset Last Updated: November 21, 2023

NRSA is part of EPA’s National Aquatic Resource Surveys which samples different surface waters on a 5-year cycle during the growing season. For logistical reasons, each NRSA cycle occurs over 2...

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Search relevance: 38.50 | Views last month: 2 | Catalog Last Checked: April 21, 2026 at 08:03 PM

#16 Federal

Dissolved inorganic carbon, pH, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from NOAA Ship GORDON GUNTER in the North Atlantic Ocean and Stellwagen Bank National Marine Sanctuary from 2014-03-01 to 2014-03-08 (NCEI Accession 0157464)

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: December 11, 2016 at 12:00 AM

This dataset includes chemical, discrete sample, physical and profile data collected from NOAA Ship GORDON GUNTER in the North Atlantic Ocean and Stellwagen Bank National Marine Sanctuary from...

Search relevance: 38.47 | Views last month: 1 | Catalog Last Checked: May 29, 2026 at 07:12 PM

#17 Federal

Measurements of total dissolved inorganic carbon (DIC), total alkalinity (TA) and pH (on total scale) and other variables collected from surface underway observations using Dissolved Inorganic Carbon Extractor (DICE), Metrohm 876 Dosimat Plus, Agilent 8453 spectrometer and other instruments from R/V Roger Revelle in the Indian Ocean during the transit time on GO-SHIP sections I08S and I09N (EXPOCODEs 33RR20160208 and 33RR20160321) from 2016-02-08 to 2016-03-24 (NCEI Accession 0162262)

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: May 02, 2017 at 12:00 AM

This dataset consists of the surface measurements of salinity, oxygen, total inorganic carbon, total alkalinity, pH on total scale, silicate, nitrate, nitrite, phosphate and NH4 collected under...

Search relevance: 37.98 | Views last month: 1 | Catalog Last Checked: May 29, 2026 at 07:16 PM

#18 Federal

Hydrographic and chemical data obtained during the SOCCOM float deployment expedition on-board R/V Investigator cruise IN2016_v02 in the Indian and Southern Ocean from 2016-03-14 to 2016-04-13 (NCEI Accession 0163191)

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: January 06, 2018 at 12:00 AM

This dataset includes biological, chemical, discrete sample, optical, physical and profile data collected from Investigator in the Indian Ocean and South Pacific Ocean from 2016-03-14 to...

Search relevance: 37.50 | Views last month: 0 | Catalog Last Checked: May 29, 2026 at 07:17 PM

#19 Federal

pH, WATER TEMPERATURE, and others in Coastal Waters of Texas from 2018-10-25 to 2020-03-16 (NCEI Accession 0229071)

Organization: National Oceanic and Atmospheric Administration, Department of Commerce
Dataset Last Updated: June 09, 2021 at 12:00 AM

This dataset includes a variety of environmental variables from surface water of five wetland sites (three natural and two restored), and the effluent of three wastewater treatment plants....

Search relevance: 37.24 | Views last month: 2 | Catalog Last Checked: May 29, 2026 at 07:51 PM

#20 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
Dataset Last Updated: July 21, 2020 at 12:00 AM

Surface water and groundwater radium activities, concentrations of various dissolved materials, and environmental parameters (water temperature, salinity, and pH). Activities of 228Ra, 226Ra,...

Search relevance: 37.17 | Views last month: 1 | Catalog Last Checked: May 29, 2026 at 07:39 PM

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Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Normalized Atmospheric Deposition for 2002, Ammonium (NH4)

Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Normalized Atmospheric Deposition for 2002, Ammonium (NH4)

TROPESS Chemical Reanalysis Aerosol NH4 Monthly 3-dimensional Product V1 (TRPSCRAERNH4M3D) at GES DISC

TROPESS Chemical Reanalysis Surface Aerosol NH4 2-Hourly 2-dimensional Product V1 (TRPSCRAERNH42H2D) at GES DISC

TROPESS Chemical Reanalysis Aerosol NH4 6-Hourly 3-dimensional Product V1 (TRPSCRAERNH46H3D) at GES DISC

Annual Mean PM2.5 Components (EC, NH4, NO3, OC, SO4) 50m Urban and 1km Non-Urban Area Grids for Contiguous U.S., 2000-2019 v1

Annual Mean PM2.5 Components (EC, NH4, NO3, OC, SO4) 50m Urban and 1km Non-Urban Area Grids for Contiguous U.S., 2000-2019 v1

Experimental evaluation of nutrient and disease treatment effects on Acropora cervicornis (NCEI Accession 0299892)

NOAA/WDS Paleoclimatology - GRIP Ice Core 248 KYr H2O2, HCHO, NH4+ and Ca2+ Data

Hydrographic and Chemical Data Obtained During the R/V Meteor cruise M107 (EXPOCODE 06M320140530) in the Atlantic Ocean from 2014-05-30 to 2014-07-03 (NCEI Accession 0170851)

Cruise report for data on water temperature, salinity, currents, and spreadsheet of marine chemistry data taken from the research vessel XIANG YANG HONG 03 in the US EEZ in the North central Pacific Ocean from 2019-09-02 to 2019-09-12 (NCEI Accession 0276895)

Temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from PROFESSOR KHROMOV in the North Pacific Ocean and Sea of Okhotsk from 1999-08-27 to 1999-09-28 (NCEI Accession 0157466)

Nutrients, transient tracers, and other variables collected from profile and discrete sampling observations using Niskin bottle, CTD and other instruments in the Arctic Ocean from 2005-05-02 to 2009-05-18 (NCEI Accession 0117695)

PH, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using CTD, bottle and other instruments from JAMES CLARK ROSS in the South Atlantic Ocean, South Pacific Ocean and Southern Oceans from 2015-12-17 to 2016-01-13 (NCEI Accession 0157011)

NRSA data 2000-2014 Deposition Largest N Source Lin et al.

Hydrographic and chemical data obtained during the SOCCOM float deployment expedition on-board R/V Investigator cruise IN2016_v02 in the Indian and Southern Ocean from 2016-03-14 to 2016-04-13 (NCEI Accession 0163191)

pH, WATER TEMPERATURE, and others in Coastal Waters of Texas from 2018-10-25 to 2020-03-16 (NCEI Accession 0229071)

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)