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
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.
Liu, Yawen, et al. "Anthropogenic–biogenic interaction amplifies warming from emission reduction over the southeastern US." Environmental Research Letters, vol. 16, no. 12, Dec. 2021. https://doi.org/10.1088/1748-9326/ac3285
@article{osti_1836222,
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},
title = {Anthropogenic–biogenic interaction amplifies warming from emission reduction over the southeastern US},
annote = {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},
url = {https://www.osti.gov/biblio/1836222},
journal = {Environmental Research Letters},
issn = {ISSN 1748-9326},
number = {12},
volume = {16},
place = {United States},
publisher = {IOP Publishing},
year = {2021},
month = {12}}
ARM Data Center, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Natural Science Foundation of China (NSFC); Ministry of Science and Technology of China
Grant/Contract Number:
AC06-76RL01830
OSTI ID:
1836222
Alternate ID(s):
OSTI ID: 2574851
Journal Information:
Environmental Research Letters, Journal Name: Environmental Research Letters Journal Issue: 12 Vol. 16; ISSN 1748-9326
Welton, Ellsworth J.; Campbell, James R.; Spinhirne, James D.
Second International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, SPIE Proceedingshttps://doi.org/10.1117/12.417040