世界气象组织：2023年世界气象组织空中尘埃公告（英文版）

The global average of annual mean dust surface concentrations in 2022 (13.8 µg m–3, see Figure 1(a)) was slightly higher than that in 2021 (13.5 µg m–3, see WMO Airborne Dust Bulletin, No. 6). This increase in 2022 is mainly attributed to enhanced dust emissions from several dust-active regions around the world, such as west-central Africa, the Arabian Peninsula, the Iranian Plateau and north-western China. Spatially, the estimated peak annual mean dust surface concentration (~900–1 200 µg m–