• Organization: Department of the Interior
• Updated: 2020-09-04T00:00:00Z

An international project developed, quality-tested, and measured isotope−delta values of 10 new food matrix reference materials (RMs) for hydrogen, carbon, nitrogen, oxygen, and sulfur stable...

• xml
• xml

• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2019-08-12T00:00:00.000+00:00

This dataset contains information collected by the Fowl River Marsh Health and Recovery Study: Stable isotope and anthropogenic influences component. Records include nitrogen (N) and carbon (C)...

• none
• none
• none
• none
• none
• none

• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

These data include tree ring widths and cellulose carbon isotope data from coniferous trees collected at the BOREAS NSA and SSA by the BOREAS TE-05 team. Ring width data are provided for both...

• none
• zip
• none
• pdf
• none
• none
• +2 more

• Organization: National Institute of Standards and Technology
• Updated: 2021-02-17 00:00:00

Data set from peer-reviewed publication: A. J. Fleisher et al., Absolute 13C/12C Isotope Amount Ratio for Vienna Pee Dee Belemnite from Infrared Absorption Spectroscopy, Nature Physics....

• html
• csv
• csv
• csv
• none
• csv
• +7 more

• Organization: Department of the Interior
• Updated: 2022-12-19T00:00:00Z

This dataset contains measurements of dissolved hydrocarbons in from groundwater samples collected in the shale gas producing regions of West Virginia, USA, between June and August of 2018. The...

• xml
• xml

• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

The BOREAS group TE-05 collected measurements in the NSA and SSA on gas exchange, gas composition and tree growth. This data set contains measurements of the concentration and stable carbon...

• none
• zip
• pdf
• none
• none
• none
• +2 more

• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This data set provides measurements for carbon (C), nitrogen (N), leaf area index (LAI), and carbon isotope ratio data (13C and 14C) of leaves sampled at the Manaus ZF2 Jacaranda transect area,...

• none
• zip
• pdf
• html
• none

• Organization: U.S. Environmental Protection Agency
• Updated: 2020-08-01

Mercury concentration, mercury stable isotope ratio, and carbon and nitrogen stable isotope ratio data as applicable for sediment, water, invertebrates, and fish collected from the St. Louis River...

• html

• Organization: Department of the Interior
• Updated: 2020-08-20T00:00:00Z

This dataset includes stable carbon isotope values, lignin, cellulose, and hemicellulose concentrations (expressed as percent of ash-free dry mass) for riparian cottonwood (Populus deltoides) tree...

• xml
• xml

• Organization: Department of the Interior
• Updated: 2020-12-07T00:00:00Z

Sulphur Banks, near the summit of Kīlauea Volcano on the Island of Hawai`i, is a thermal area where volcanic gases and steam are discharged. A research well drilled in the 1920s at Sulphur Banks...

• xml
• xml

• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This data set contains measurements of the concentration and stable carbon (13C / 12C) and nitrogen (15N / 14N) isotope ratios of plant (leaves, roots and fungi) and soil samples from southern...

• none
• zip
• pdf
• html
• none

• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2021-06-10T00:00:00.000+00:00

This dataset presents results from surface-tethered drifting sediment traps, zooplankton net tows, dissolved inorganic nutrient concentration analyses made on water column samples, and flow...

• none
• none
• none
• none
• none
• none
• +1 more

• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This data set reports stable isotope ratio data of CO2 (13C/12C and 18O/16O) associated with photosynthetic and respiratory exchanges across the biosphere-atmosphere boundary. Measurements were...

• none
• zip
• pdf
• html
• none

• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2019-07-12T00:00:00.000+00:00

This dataset includes discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity, temperature, salinity, dissolved oxygen, nutrients and oxygen isotope ratio during the...

• html
• none
• none
• none
• none
• html
• +3 more

• Organization: Department of the Interior
• Updated: 2020-08-27T00:00:00Z

Radiocarbon dating of silicified wood was performed at the U.S. Geological Survey’s Radiocarbon Laboratory in Denver, Colorado. All samples were chemically treated using the standard...

• xml
• xml

• Organization: Department of the Interior
• Updated: 2024-09-11T00:00:00Z

This dataset contains results from a stratigraphic section of the Hue Shale located along the Jago River in the Arctic National Wildlife Refuge at 69.9099, -143.3947 (WGS84). Sample heights were...

• xml
• xml

• Organization: Department of the Interior
• Updated: 2020-08-30T00:00:00Z

We measured foliar δ13C of Conocarpus erectus collected from Big Pine Key in 2018 as a proxy for ground water salinity.

• xml
• xml

• Organization: Department of the Interior
• Updated: 2021-10-13T00:00:00Z

Geochemical and isotopic compositions were determined in stream sediment and parent rocks collected in April 2017 and June 2017 and in nearshore sediment collected bimonthly in sediment traps from...

• xml
• xml

• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2025-02-13T00:00:00.000+00:00

Rock, sediment, and bottom water samples were collected via ROV Hercules from seamounts in the Papahānaumokuākea Marine National Monument during expeditions NA134 and NA138 of EV Nautilus, to...

• none
• none
• none
• none
• html
• html
• +8 more

• Organization: Department of Agriculture
• Updated: 2025-11-21

Biochars are charcoals used as soil amendments, and they have many beneficial effects on soil health. However, one negative effect is biochars often reduce concentrations of soil nitrogen that are...

• csv
• csv
• xls
• csv
• csv