• Organization: U.S. Environmental Protection Agency
• Updated: 2025-08-14

Spatiotemporal trends in PM2.5 chemical composition in the conterminous U.S. This dataset is not publicly accessible because: Non-EPA data owned by University of North Carolina at Chapel,...

• Organization: Department of the Interior
• Updated: 2015-01-01T00:00:00Z

The chemical composition of lakes is an important ecosystem property that can have considerable influence on aquatic ecosystem structure and function. Since lake chemistry is sensitive to climate...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2024-12-12

Indoor chamber and filter extraction experimental details, E-AIM II model results, RPLC(−) and HILIC/(−)ESI-HR-QTOF instrument conditions and oxidation product spectra, SOA yield comparison at...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2018-12-03

The effect of acidity and relative humidity on bulk isoprene aerosol parameters has been investigated in several studies, however few measurements have been conducted on individual aerosol...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1991-12-31T00:00:00.000+00:00

The USGS Ferromanganese Crust data set was compiled by F.T. Manheim and C.M. Lane-Bostwick of the U.S. Geological Survey, Woods Hole, MA. The data set consists of tables corresponding the USGS...

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• Organization: Department of the Interior
• Updated: 2020-08-31T00:00:00Z

During October 1995 through March 2014, the U.S. Geological Survey in cooperation with the National Park Service, Luray, Virginia Station collected and analyzed samples of selected springs, air...

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• Organization: Department of the Interior
• Updated: 2023-03-30T00:00:00Z

Following the 2018 eruption of Kīlauea Volcano (Neal and others, 2019) and the subsequent collapse of the Halema’uma’u crater, groundwater gradually seeped into the newly-deepened crater (Nadeau...

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• Organization: Department of the Interior
• Updated: 2023-03-30T00:00:00Z

Aliquots of collected water samples were prepared for isotopic analysis at the USGS laboratories in Menlo Park, CA by precipitating dissolved sulfate as barium sulfate, using the methods of...

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• Organization: Department of the Interior
• Updated: 2023-03-30T00:00:00Z

Samples from outside the crater lake were analyzed for their sulfur isotopic composition. Samples of sulfate alteration and native sulfur from the Kīlauea summit, Halema’uma’u crater (HMM), and...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2019-09-25

There are two parts of data; 1) fluorescence excitation-emission matrices (EEMs) and 2) disinfection by-products (DBP) such as THM and HAA. This dataset is associated with the following...

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• Organization: Department of the Interior
• Updated: 2023-03-30T00:00:00Z

Samples of the crater lake water were filtered in the field with a 0.45 micron filter. Subsequently, additional precipitates formed in the solute-rich samples (secondary precipitates). The solids...

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• Organization: Department of the Interior
• Updated: 2020-08-19T00:00:00Z

This dataset contains chemical and isotopic data from 39 produced water samples collected from sealed separators containing water from horizontal hydrocarbon wells in the lower Eagle Ford Group....

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• Organization: Department of the Interior
• Updated: 2020-08-31T00:00:00Z

This data release contains chemical and isotopic data used in an investigation of nitrate sources and transport in the Upper Illinois River basin. Samples (total = 445) include river water from...

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• Organization: Department of the Interior
• Updated: 2024-09-19T00:00:00Z

The chemical compositions and natural distribution of ferromanganese crusts have been a topic of interest to scientific research, as well as to industrial and military applications. These crusts...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2017-10-13

This dataset represents quantitative data on product chemical composition for >75,000 chemicals contained in >15,000 consumer products. The dataset provided at the FigShare link is fully described...

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• Organization: Department of the Interior
• Updated: 2023-03-30T00:00:00Z

This release contains data collected during two uncrewed aircraft systems (UAS) flights to sample gas plume compositions within Halema’uma’u crater, Kīlauea Volcano, Hawai'i. Gas compositions...

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• Organization: Department of the Interior
• Updated: 2023-03-30T00:00:00Z

Water samples for Oxygen-18 and deuterium isotope determinations were stored unfiltered in 15 ml glass bottles and analyzed at the USGS laboratories in Reston, Virginia. Analysis of oxygen...

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• Organization: Department of the Interior
• Updated: 2023-03-30T00:00:00Z

Samples for water chemistry analysis were filtered to 0.45 µm upon collection. Since the solute-rich samples continued to form precipitates, samples were filtered again immediately prior to...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2010-09-01T00:00:00.000+00:00

The concomitant replacement of fish meal and fish oil in carnivorous marine fish feeds by more sustainable terrestrial alternatives is problematic due to the limited capability of marine fish to...

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• Organization: Department of the Interior
• Updated: 2023-03-30T00:00:00Z

Equipment A DJI M600 Matrice Pro unoccupied aircraft system (UAS) was used for water and gas sampling, video, and thermal data collection. An Anafi Parrot UAS was also used on the 10/26/19...

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