Mean Sulfate Deposition (2020–2024)

Overview

This dataset represents modeled global atmospheric sulfate deposition developed to support ISO 9223 atmospheric corrosivity modeling for the period 2020–2024.

Atmospheric sulfate deposition is one of the primary environmental variables influencing:

• Atmospheric corrosion
• Acid deposition chemistry
• Electrochemical corrosion processes
• Protective coating degradation
• Industrial atmospheric exposure

The raster represents estimated long-term ambient atmospheric sulfate deposition behavior at approximately 1 km spatial resolution.

Units:

• Milligrams per square meter per day (mg/m²/day)

Background

Atmospheric sulfate deposition is a core environmental driver within the ISO 9223 atmospheric corrosivity framework and is closely associated with sulfur-containing atmospheric pollutants.

Sulfate deposition is primarily associated with:

• Industrial emissions
• Fossil fuel combustion
• Urban atmospheric pollution
• Atmospheric sulfur transport
• Regional acid deposition processes

Higher sulfate deposition environments generally result in increased atmospheric acidity, enhanced electrolyte chemistry, corrosion acceleration, and coating degradation.

This dataset was developed to provide global sulfate deposition estimates suitable for corrosion engineering, environmental modeling, and GIS-based exposure assessment.

Modeling Methodology

The sulfate deposition framework integrates atmospheric chemistry products, climate reanalysis data, observational datasets, and regional interpolation methods.

Primary sulfate inputs include:

• MERRA-2 sulfate aerosol products
• Atmospheric sulfur transport variables
• Sulfate deposition products
• Atmospheric chemistry reanalysis datasets

The modeling framework incorporates:

Atmospheric Chemistry

• Sulfate aerosol transport
• Sulfur deposition behavior
• Regional atmospheric chemistry gradients

Climate Integration

• Temperature
• Humidity
• Atmospheric circulation patterns
• Long-term climatological averages

Spatial Modeling

• Kriged observational datasets
• Atmospheric interpolation methods
• Regional environmental gradients

Industrial Influence

• Urban atmospheric influence
• Industrial emissions patterns
• Regional acid deposition behavior

The resulting framework was designed to improve representation of ambient atmospheric sulfate deposition behavior within industrial, urban, rural, and remote environments.

Interpretation Guidelines

Higher sulfate deposition values generally indicate increased atmospheric acidity and elevated atmospheric corrosion potential.

Spatial Resolution

Data Sources

Primary environmental inputs include:

• NASA MERRA-2 Atmospheric Reanalysis
• NASA Giovanni System
• NOAA Integrated Surface Database (ISD)
• National Atmospheric Deposition Program (NADP)
• Atmospheric chemistry and environmental datasets

Derived environmental layers include:

• Temperature
• Relative Humidity
• Wind Speed
• Wind Direction
• Atmospheric Corrosion Layers

Intended Applications

This dataset may be used for:

• Atmospheric corrosion assessment
• ISO 9223 modeling
• Acid deposition analysis
• Industrial exposure assessment
• Corrosion engineering
• GIS visualization
• Environmental modeling
• Enterprise API workflows

Related Datasets

Corrosion Layers

• ISO 9223 Steel Corrosion Rate
• ISO 9223 Zinc Corrosion Rate
• ISO 9223 Aluminum Corrosion Rate
• ISO 9223 Copper Corrosion Rate

Supporting Atmospheric Layers

• Mean Chloride Deposition
• Mean Annual Temperature
• Mean Relative Humidity
• Time of Wetness (TOW)

Supporting Coastal & Terrain Layers

• Distance to Coast
• Bathymetry 2024 – Terrain Elevation
• WindRIX Terrain–Wind Exposure Index
• Wind Resultant Direction (0–360°)
• Wind Speed

Attribution

Joseph Mazzella
AtmosphericIQ LLC
Engineering Director, Inc.

Dataset Citation

Mazzella, J. (2026). Mean Sulfate Deposition Raster (2020–2024). AtmosphericIQ LLC / Engineering Director, Inc.

Supporting Dataset Citations

NASA MERRA-2

NASA Global Modeling and Assimilation Office (GMAO). MERRA-2 Atmospheric Reanalysis Dataset.
https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/

NASA Giovanni

NASA Goddard Earth Sciences Data and Information Services Center (GES DISC). NASA Giovanni System.
https://giovanni.gsfc.nasa.gov/giovanni/

NOAA ISD

NOAA National Centers for Environmental Information (NCEI). Integrated Surface Database (ISD).
https://www.ncei.noaa.gov/products/land-based-station/integrated-surface-database

National Atmospheric Deposition Program

National Atmospheric Deposition Program (NADP). National Atmospheric Deposition Program.
https://nadp.slh.wisc.edu/

ISO 9223 Standard

ISO 9223:2012. Corrosion of metals and alloys — Corrosivity of atmospheres — Classification, determination and estimation.
https://www.iso.org/standard/53499.html

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