Observed and CMIP6-model-simulated organic aerosol response to drought in the contiguous United States during summertime

Li, Wei; Wang, Yuxuan

doi:https://doi.org/10.5194/acp-24-9339-2024

Articles | Volume 24, issue 16

https://doi.org/10.5194/acp-24-9339-2024

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

https://doi.org/10.5194/acp-24-9339-2024

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

Articles | Volume 24, issue 16

Research article

|

27 Aug 2024

Research article |

| 27 Aug 2024

Observed and CMIP6-model-simulated organic aerosol response to drought in the contiguous United States during summertime

Wei Li and Yuxuan Wang

Supplement

https://doi.org/10.5194/acp-24-9339-2024-supplement

Data sets

Analysis of daily, monthly, and annual burned area using the fourth-generation global fire emissions database (GFED4) (https://www.geo.vu.nl/~gwerf/GFED/GFED4/) Louis Giglio et al. https://doi.org/10.1002/jgrg.20042

CERES Time-Interpolated TOA Fluxes, Clouds and Aerosols Monthly Terra Edition4A NASA https://doi.org/10.5067/TERRA/CERES/SSF1DEGMONTH_L3.004A

A multiscalar drought index sensitive to global warming: The Standardized Precipitation Evapotranspiration Index (https://spei.csic.es/spei_database_2_6) Sergio M. Vicente-Serrano et al. https://doi.org/10.1175/2009JCLI2909.1

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Short summary

Droughts immensely increased organic aerosol (OA) in the contiguous United States in summer (1998–2019), notably in the Pacific Northwest (PNW) and Southeast (SEUS). The OA rise in the SEUS is driven by the enhanced formation of epoxydiol-derived secondary organic aerosol due to the increase in biogenic volatile organic compounds and sulfate, while in the PNW, it is caused by wildfires. A total of 10 climate models captured the OA increase in the PNW yet greatly underestimated it in the SEUS.