Anthropogenic–biogenic interaction amplifies warming from emission reduction over the southeastern US
Abstract
A decline of surface biogenic secondary organic aerosols through the mediation of reduced anthropogenic aerosols has been recognized as an air quality co-benefit of anthropogenic emission control over the southeastern US. However, the climate impacts of this anthropogenic–biogenic interaction remain poorly understood. Here, we identified a substantial decline of summertime aerosol loading aloft over the southeastern US in recent decades through the interaction, which leads to a stronger decline in column-integrated aerosol optical depth and a greater increase in radiative fluxes over the southeastern than northeastern US, different from trends of anthropogenic emissions and near-surface aerosol loading. The anthropogenic–biogenic interaction is shown to explain more than 60% of the coherent increasing trend of 5.3 Wm-2decade-1 in clear-sky surface downward radiative fluxes. We show that current climate models fail to represent this interaction. The interaction is further projected to amplify the positive radiative forcing from emission control by 42.3% regionally over the southeastern US and globally by 5.4% in 2050 under RCP4.5 compared to 2005. This amplification effect implies greater challenges to achieving the Paris Agreement temperature targets with continuous emission control in future.
- Authors:
-
- Nanjing Univ. (China); Nanjing Univ. (China). Joint International Research Lab. of Atmospheric, Earth System Sciences & Inst. for Climate and Global Change Research
- Univ. of Alaska, Fairbanks, AK (United States). Geophysical Inst.
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Nantong Univ. (China). Research Center for Intelligent Information Technology
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Atmospheric Radiation Measurement (ARM) Data Center
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); National Natural Science Foundation of China (NSFC); Ministry of Science and Technology of China
- OSTI Identifier:
- 1836222
- Grant/Contract Number:
- AC06-76RL01830; 91744208; 41925023; 41575073; 41621005; 2017YFA0604002; 2016YFC0200503
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Environmental Research Letters
- Additional Journal Information:
- Journal Volume: 16; Journal Issue: 12; Journal ID: ISSN 1748-9326
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; emission control; biogenic secondary organic aerosol; anthropogenic–biogenic interaction; AOD trend; radiative forcing
Citation Formats
Liu, Yawen, Liu, Yaman, Wang, Minghuai, Dong, Xinyi, Zheng, Yiqi, Shrivastava, Manish, Qian, Yun, Bai, Heming, Li, Xiao, and Yang, Xiu-Qun. Anthropogenic–biogenic interaction amplifies warming from emission reduction over the southeastern US. United States: N. p., 2021.
Web. doi:10.1088/1748-9326/ac3285.
Liu, Yawen, Liu, Yaman, Wang, Minghuai, Dong, Xinyi, Zheng, Yiqi, Shrivastava, Manish, Qian, Yun, Bai, Heming, Li, Xiao, & Yang, Xiu-Qun. Anthropogenic–biogenic interaction amplifies warming from emission reduction over the southeastern US. United States. https://doi.org/10.1088/1748-9326/ac3285
Liu, Yawen, Liu, Yaman, Wang, Minghuai, Dong, Xinyi, Zheng, Yiqi, Shrivastava, Manish, Qian, Yun, Bai, Heming, Li, Xiao, and Yang, Xiu-Qun. Fri .
"Anthropogenic–biogenic interaction amplifies warming from emission reduction over the southeastern US". United States. https://doi.org/10.1088/1748-9326/ac3285. https://www.osti.gov/servlets/purl/1836222.
@article{osti_1836222,
title = {Anthropogenic–biogenic interaction amplifies warming from emission reduction over the southeastern US},
author = {Liu, Yawen and Liu, Yaman and Wang, Minghuai and Dong, Xinyi and Zheng, Yiqi and Shrivastava, Manish and Qian, Yun and Bai, Heming and Li, Xiao and Yang, Xiu-Qun},
abstractNote = {A decline of surface biogenic secondary organic aerosols through the mediation of reduced anthropogenic aerosols has been recognized as an air quality co-benefit of anthropogenic emission control over the southeastern US. However, the climate impacts of this anthropogenic–biogenic interaction remain poorly understood. Here, we identified a substantial decline of summertime aerosol loading aloft over the southeastern US in recent decades through the interaction, which leads to a stronger decline in column-integrated aerosol optical depth and a greater increase in radiative fluxes over the southeastern than northeastern US, different from trends of anthropogenic emissions and near-surface aerosol loading. The anthropogenic–biogenic interaction is shown to explain more than 60% of the coherent increasing trend of 5.3 Wm-2decade-1 in clear-sky surface downward radiative fluxes. We show that current climate models fail to represent this interaction. The interaction is further projected to amplify the positive radiative forcing from emission control by 42.3% regionally over the southeastern US and globally by 5.4% in 2050 under RCP4.5 compared to 2005. This amplification effect implies greater challenges to achieving the Paris Agreement temperature targets with continuous emission control in future.},
doi = {10.1088/1748-9326/ac3285},
journal = {Environmental Research Letters},
number = 12,
volume = 16,
place = {United States},
year = {Fri Dec 03 00:00:00 EST 2021},
month = {Fri Dec 03 00:00:00 EST 2021}
}
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