TY - JOUR

T1 - The impacts of aerosol emissions on historical climate in ukesm1

AU - Seo, Jeongbyn

AU - Shim, Sungbo

AU - Kwon, Sang Hoon

AU - Boo, Kyung On

AU - Kim, Yeon Hee

AU - O’connor, Fiona

AU - Johnson, Ben

AU - Dalvi, Mohit

AU - Folberth, Gerd

AU - Teixeira, Joao

AU - Mulcahy, Jane

AU - Hardacre, Catherine

AU - Turnock, Steven

AU - Woodward, Stephanie

AU - Abraham, Luke

AU - Keeble, James

AU - Griffiths, Paul

AU - Archibald, Alex

AU - Richardson, Mark

AU - Dearden, Chris

AU - Carslaw, Ken

AU - Williams, Jonny

AU - Zeng, Guang

AU - Morgenstern, Olaf

N1 - Publisher Copyright: © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2020/10/14

Y1 - 2020/10/14

N2 - As one of the main drivers for climate change, it is important to understand changes in anthropogenic aerosol emissions and evaluate the climate impact. Anthropogenic aerosols have affected global climate while exerting a much larger influence on regional climate by their short lifetime and heterogeneous spatial distribution. In this study, the effective radiative forcing (ERF), which has been accepted as a useful index for quantifying the effect of climate forcing, was evaluated to understand the effects of aerosol on regional climate over a historical period (1850–2014). Eastern United States (EUS), Western European Union (WEU), and Eastern Central China (ECC), are regions that predominantly emit anthropogenic aerosols and were analyzed using Coupled Model Intercomparison Project 6 (CMIP6) simulations implemented within the framework of the Aerosol Chemistry Model Intercomparison Project (AerChemMIP) in the UK’s Earth System Model (UKESM1). In EUS and WEU, where industrialization occurred relatively earlier, the negative ERF seems to have been recovering in recent decades based on the decreasing trend of aerosol emissions. Conversely, the radiative cooling in ECC seems to be strengthened as aerosol emission continuously increases. These aerosol ERFs have been largely attributed to atmospheric rapid adjustments, driven mainly by aerosol-cloud interactions rather than direct effects of aerosol such as scattering and absorption.

AB - As one of the main drivers for climate change, it is important to understand changes in anthropogenic aerosol emissions and evaluate the climate impact. Anthropogenic aerosols have affected global climate while exerting a much larger influence on regional climate by their short lifetime and heterogeneous spatial distribution. In this study, the effective radiative forcing (ERF), which has been accepted as a useful index for quantifying the effect of climate forcing, was evaluated to understand the effects of aerosol on regional climate over a historical period (1850–2014). Eastern United States (EUS), Western European Union (WEU), and Eastern Central China (ECC), are regions that predominantly emit anthropogenic aerosols and were analyzed using Coupled Model Intercomparison Project 6 (CMIP6) simulations implemented within the framework of the Aerosol Chemistry Model Intercomparison Project (AerChemMIP) in the UK’s Earth System Model (UKESM1). In EUS and WEU, where industrialization occurred relatively earlier, the negative ERF seems to have been recovering in recent decades based on the decreasing trend of aerosol emissions. Conversely, the radiative cooling in ECC seems to be strengthened as aerosol emission continuously increases. These aerosol ERFs have been largely attributed to atmospheric rapid adjustments, driven mainly by aerosol-cloud interactions rather than direct effects of aerosol such as scattering and absorption.

KW - Aerosol

KW - Aerosol-cloud interaction

KW - Aerosol-radiation interaction

KW - Effective radiative forcing

KW - Instantaneous radiative forcing

KW - Rapid adjustments

U2 - 10.3390/atmos11101095

DO - 10.3390/atmos11101095

M3 - Journal article

AN - SCOPUS:85092693593

VL - 11

JO - Atmosphere

JF - Atmosphere

SN - 2073-4433

IS - 10

M1 - 1095

ER -