Dust semi-direct effects: low-level cloud response to free-tropospheric dust-induced longwave radiation over the North Atlantic Ocean

Pandey, Satyendra K.; Adebiyi, Adeyemi A.

doi:10.5194/acp-26-217-2026

Articles | Volume 26, issue 1

https://doi.org/10.5194/acp-26-217-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-26-217-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 1

Research article

|

07 Jan 2026

Research article |

| 07 Jan 2026

Dust semi-direct effects: low-level cloud response to free-tropospheric dust-induced longwave radiation over the North Atlantic Ocean

Satyendra K. Pandey and Adeyemi A. Adebiyi

Supplement

https://doi.org/10.5194/acp-26-217-2026-supplement

Data sets

Dust semi-direct effects: The influence of free-tropospheric dust-induced longwave radiation on low-level cloud response over the North Atlantic Ocean Satyendra K Pandey and Adeyemi A Adebiyi https://doi.org/10.5281/zenodo.15571618

CALIPSO Lidar Level 2 Aerosol Profile, V4-20 NASA/LARC/SD/ASDC https://doi.org/10.5067/CALIOP/CALIPSO/LID_L2_05KMAPRO-STANDARD-V4-20

CALIPSO Lidar Level 2 5 km Aerosol Layer Data, V4-20 NASA/LARC/SD/ASDC https://doi.org/10.5067/CALIOP/CALIPSO/LID_L2_05KMALAY-STANDARD-V4-20

Dust semi-direct effects: Low-level cloud response to free-tropospheric dust-induced longwave radiation over the North Atlantic Ocean S. K. Pandey and A. Adebiyi https://doi.org/10.5281/zenodo.15571618

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Short summary

Mineral dust absorbs solar and terrestrial radiation, modifying the environment where clouds exist. When above low-level clouds, dust often increases cloud cover due to shortwave absorption. Using satellite data over the North Atlantic Ocean, we show that longwave absorption by dust reduces cloud-top cooling and weakens the increase in low-level cloud. Our results highlight the importance of accurately representing longwave effects of dust in model assessments of aerosol-climate interactions.