A database of Brine samples from the BOM and USGS to be used for NatCarb.

Nitrate and sulfate are two key components of airborne particulate matter (PM). While multiple formation mechanisms have been proposed for sulfate, current air quality models commonly underestimate its concentrations and mass fractions during northern China winter haze events. On the other hand, current models usually overestimate the mass fractions of nitrate. Very recently, laboratory studies have proposed that nitrous acid (N(III)) produced by particulate nitrate photolysis can oxidize sulfur dioxide to produce sulfate. Here, for the first time, we parameterize this heterogeneous mechanism into the state-of-the-art Community Multi-scale Air Quality (CMAQ) model and quantify its contributions to sulfate formation. We find that the significance of this mechanism mainly depends on the enhancement effects (by 1–3 orders of magnitude as suggested by the available experimental studies) of nitrate photolysis rate constant ("J" _(〖"NO" 〗_"3" ^- )) in aerosol liquid water compared to that in the gas phase. Comparisons between model simulations and in-situ observations in Beijing suggest that this pathway can explain about 15% (assuming an enhancement factor (EF) of 10) to 65% (assuming EF = 100) of the model–observation gaps in sulfate concentrations during winter haze. Our study strongly calls for future research on reducing the uncertainty in EF. This dataset is not publicly accessible because: Data sets used in the analysis presented in the manuscript “Contribution of particulate nitrate photolysis to heterogeneous sulfate formation for winter haze in China” Model simulations were conducted by Tsinghua University in China and results are available from the Tsinghua University. Contact: Haotian Zheng, School of Environment, State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China. Email: hzheng@g.harvard.edu. It can be accessed through the following means: Data sets used in the analysis presented in the manuscript “Contribution of particulate nitrate photolysis to heterogeneous sulfate formation for winter haze in China” Model simulations were conducted by Tsinghua University in China and results are available from the Tsinghua University. Contact: Haotian Zheng, School of Environment, State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China. Email: hzheng@g.harvard.edu. Format: Data sets used in the analysis presented in the manuscript “Contribution of particulate nitrate photolysis to heterogeneous sulfate formation for winter haze in China” Model simulations were conducted by Tsinghua University in China and results are available from the Tsinghua University. Contact: Haotian Zheng, School of Environment, State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China. Email: hzheng@g.harvard.edu. This dataset is associated with the following publication: Sarwar, G., H. Zheng, S. Song, M. Gen, S. Wang, D. Ding, X. Chang, J. Xing, Y. Sun, D. Ji, C. Chan, J. Gao, and M. McElroy. Contribution of Particulate Nitrate Photolysis to Heterogeneous Sulfate Formation for Winter Haze in China. Environmental Science & Technology Letters. American Chemical Society, Washington, DC, USA, 7(9): 632-638, (2020).

People drink and use water every day. Therefore, the environmental health impacts of drinking water are extremely important. The majority of New Mexicans are provided high quality drinking water. About 90% of people in New Mexico get their water from a Community Drinking Water system. The US Environmental Protection Agency (EPA) sets regulations for treating and monitoring drinking water delivered by community water systems. There are water quality standards and monitoring requirements for over 90 contaminants. The New Mexico Environmental Public Health Tracking works closely with community, state, and federal organizations to explore connections between drinking water and health outcomes. In addition our Biomonitoring Program program looks at arsenic and Contaminants in urine and drinking water.

Results from a nanofiltration study utilizing simulated geothermal brines. The data includes a PDF documenting the process used to remove Calcium, Magnesium, Sodium, Silica, Lithium, Chlorine, and Sulfate from simulated geothermal brines. Three different membranes were evaluated. The results were analyzed using inductively coupled plasma mass spectrometry (ICP-MS).

A data delivery application that provides web-based access to of soil, water, climate, land management, and geospatial data produced by Conservation Effects Assessment Project (CEAP) watershed research sites across the United States. Data access via ArcGIS Server and MS SQL Server Enhanced data searches and summary options in Tools Access to high-resolution imagery in the Map>Table of Contents Enhanced graphing options on the Get Data page Transparency sliders for individual map components in the Map>Table of Contents

Measurements of water sulfate concentrations at the beginning and end of the exposures of the animals, initial δ(34S/32S) ratios in the animals at the beginning and end of the exposures, and initial δ(34S/32S) ratios of the exposure water. This dataset is associated with the following publication: Griffith, M., J. Lazorchak, and H. Haring. Uptake of Sulfate from Ambient Water by Freshwater Animals. WATER. MDPI AG, Basel, SWITZERLAND, 12(5): 1496, (2020).

COMBINE_CONC_A0_2016_without_DMS_AVG.tar – annual average model predicted concentrations without DMS chemistry COMBINE_CONC_A_2016_annual_AVG.tar – annual average model predicted concentrations with DMS chemistry GRIDCRO2D.108NHEMI2.44L.20060101.tar - file containing latitude and longitude of model grid-cell Model: The Community Multiscale Air Quality (CMAQv53) was used. It is available at https://www.epa.gov/cmaq. This dataset is associated with the following publication: Gantt, B., K. Foley, B. Henderson, H. Pye, K. Fahey, D. Kang, R. Mathur, J. Zhao, Y. Zhang, Q. Li, A. Saiz-Lopez, and G. Sarwar. Impact of dimethylsulfide chemistry on air quality over the Northern Hemisphere. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, USA, 244: 117961, (2020).