Daytime variation in the aerosol indirect effect for warm marine boundary layer clouds in the eastern North Atlantic

Qiu, Shaoyue; Zheng, Xue; Painemal, David; Terai, Christopher R.; Zhou, Xiaoli

doi:https://doi.org/10.5194/acp-24-2913-2024

Articles | Volume 24, issue 5

https://doi.org/10.5194/acp-24-2913-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-2913-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 5

Research article

|

06 Mar 2024

Research article |

| 06 Mar 2024

Daytime variation in the aerosol indirect effect for warm marine boundary layer clouds in the eastern North Atlantic

Shaoyue Qiu, Xue Zheng, David Painemal, Christopher R. Terai, and Xiaoli Zhou

Supplement

https://doi.org/10.5194/acp-24-2913-2024-supplement

Data sets

Minnis Cloud Products Using Visst Algorithm (VISSTGRIDM11MINNIS), 2018-02-20 to 2021-12-31 Atmospheric Radiation Measurement (ARM) user facility https://adc.arm.gov/discovery/#/results/datastream::enavisstgridm11minnisX1.c1

Active Remote Sensing of CLouds (ARSCL) product using Ka-band ARM Zenith Radars (ARSCLKAZR1KOLLIAS), 2015-07-17 to 2022-03-31 Atmospheric Radiation Measurement (ARM) user facility https://doi.org/10.5439/1393437

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Short summary

The aerosol indirect effect (AIE) depends on cloud states, which exhibit significant diurnal variations in the northeastern Atlantic. Yet the AIE diurnal cycle remains poorly understood. Using satellite retrievals, we find a pronounced “U-shaped” diurnal variation in the AIE, which is contributed to by the transition of cloud states combined with the lagged cloud responses. This suggests that polar-orbiting satellites with overpass times at noon underestimate daytime mean values of the AIE.