ASDC | MAIA Surface Monitor Data Product Announcement

MAIA Surface Monitor Data Product Announcement

Dec. 26, 2024, 1:27 p.m.

Project: MAIA

The NASA Jet Propulsion Laboratory (JPL) Multi-Angle Imager for Aerosols (MAIA) project and NASA Langley's Atmospheric Science Data Center (ASDC) announce the release of the MAIA Surface Monitor Data Product. These products include ground-based measurements of total PM2.5, total PM10, and chemically speciated PM2.5 (including sulfate, nitrate, elemental carbon, organic carbon, and dust) at various locations within MAIA’s globally distributed set of Primary Target Areas (PTAs). Applications of these data include air quality, climate, and epidemiological research.

Surface monitors are fixed-location, ground-based stations that provide accurate information about local levels and composition of outdoor particulate matter (PM). Measurements from these stations are used as "ground truth" for transforming MAIA satellite data into near-surface PM mass concentrations. More details about the sources and types of surface PM monitors used in the MAIA project can be found here: https://maia.jpl.nasa.gov/mission/#surface_networks

The Surface Monitor Data Product is provided in netCDF format and organized into individual files by PM type (total or speciated), with one file per day and per PTA containing measurements from particulate matter monitoring sites within that PTA. Each file includes both raw and quality-controlled data.

Data coverage for total PM and speciated PM2.5 measurements begins in November 2022 and January 2021, respectively, though exact start dates may vary by target area and data source. The product files are regularly updated as new measurements become available, and this practice will continue through the end of the MAIA mission. The Surface Monitor Data Product is accessible via the MAIA Project Page at ASDC.

For information about the locations of MAIA PTAs and details on the MAIA surface monitoring network, please see https://maia.jpl.nasa.gov/mmgis/.