![Two global maps show particulate matter (PM) concentrations: (a) current distribution and (b) change in PM levels. Warmer colors indicate higher PM in (a) and increases in (b); cooler colors indicate decreases in (b).](https://wmo.int/sites/default/files/styles/prose_1x/public/2024-07/Picture1.png?itok=fK-x37R4)
Annual mean surface concentration of mineral dust (in μg m–3) in 2023. (b) Anomaly of the annual mean surface dust concentration in 2023 relative to the 1981–2010 mean. Source: These results are derived from the Modern-Era Retrospective Analysis for Research and Applications, Version 2 (MERRA-2) (Gelaro et al., 2017)