Fig. 1: Observed trends of dust storm (DS) frequency and Asian sulfate AOD.
From: Anthropogenic sulfate-climate interactions suppress dust activity over East Asia

a Annual DS frequency trends (days per decade) over East Asia during 1979–2013 and (b) time series of annual DS frequency over the region with 70–105°E, 35–50°N (red box in a). c Sulfate AOD trends (per decade) from 1980–2013 based on the MERRA-2 Aerosol Reanalysis. d Simulated annual dust surface mass concentration (μg m−3) in CAM4-BAM. Red star in (b) and slanted lines in (c) indicate significance at the 95% confidence level by a standard t-test.