Return to different climate states by reducing sulphate aerosols under future CO2 concentrations

Abstract It is generally believed that anthropogenic aerosols cool the atmosphere; therefore, they offset the global warming resulting from greenhouse gases to some extent. Reduction in sulphate, a primary anthropogenic aerosol, is necessary for mitigating air pollution, which causes atmospheric war...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autor principal:	Toshihiko Takemura
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9baa64e20a2e4349ae6c8aaa9e9e127f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:9baa64e20a2e4349ae6c8aaa9e9e127f
record_format	dspace
spelling	oai:doaj.org-article:9baa64e20a2e4349ae6c8aaa9e9e127f2021-12-02T12:33:14ZReturn to different climate states by reducing sulphate aerosols under future CO2 concentrations10.1038/s41598-020-78805-12045-2322https://doaj.org/article/9baa64e20a2e4349ae6c8aaa9e9e127f2020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78805-1https://doaj.org/toc/2045-2322Abstract It is generally believed that anthropogenic aerosols cool the atmosphere; therefore, they offset the global warming resulting from greenhouse gases to some extent. Reduction in sulphate, a primary anthropogenic aerosol, is necessary for mitigating air pollution, which causes atmospheric warming. Here, the changes in the surface air temperature under various anthropogenic emission amounts of sulphur dioxide (SO2), which is a precursor of sulphate aerosol, are simulated under both present and doubled carbon dioxide (CO2) concentrations with a climate model. No previous studies have conducted explicit experiments to estimate the temperature changes due to individual short-lived climate forcers (SLCFs) in different climate states with atmosphere–ocean coupled models. The simulation results clearly show that reducing SO2 emissions at high CO2 concentrations will significantly enhance atmospheric warming in comparison with that under the present CO2 concentration. In the high latitudes of the Northern Hemisphere, the temperature change that will occur when fuel SO2 emissions reach zero under a doubled CO2 concentration will be approximately 1.0 °C, while this value will be approximately 0.5 °C under the present state. This considerable difference can affect the discussion of the 1.5 °C/2 °C target in the Paris Agreement.Toshihiko TakemuraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Toshihiko Takemura Return to different climate states by reducing sulphate aerosols under future CO2 concentrations
description	Abstract It is generally believed that anthropogenic aerosols cool the atmosphere; therefore, they offset the global warming resulting from greenhouse gases to some extent. Reduction in sulphate, a primary anthropogenic aerosol, is necessary for mitigating air pollution, which causes atmospheric warming. Here, the changes in the surface air temperature under various anthropogenic emission amounts of sulphur dioxide (SO2), which is a precursor of sulphate aerosol, are simulated under both present and doubled carbon dioxide (CO2) concentrations with a climate model. No previous studies have conducted explicit experiments to estimate the temperature changes due to individual short-lived climate forcers (SLCFs) in different climate states with atmosphere–ocean coupled models. The simulation results clearly show that reducing SO2 emissions at high CO2 concentrations will significantly enhance atmospheric warming in comparison with that under the present CO2 concentration. In the high latitudes of the Northern Hemisphere, the temperature change that will occur when fuel SO2 emissions reach zero under a doubled CO2 concentration will be approximately 1.0 °C, while this value will be approximately 0.5 °C under the present state. This considerable difference can affect the discussion of the 1.5 °C/2 °C target in the Paris Agreement.
format	article
author	Toshihiko Takemura
author_facet	Toshihiko Takemura
author_sort	Toshihiko Takemura
title	Return to different climate states by reducing sulphate aerosols under future CO2 concentrations
title_short	Return to different climate states by reducing sulphate aerosols under future CO2 concentrations
title_full	Return to different climate states by reducing sulphate aerosols under future CO2 concentrations
title_fullStr	Return to different climate states by reducing sulphate aerosols under future CO2 concentrations
title_full_unstemmed	Return to different climate states by reducing sulphate aerosols under future CO2 concentrations
title_sort	return to different climate states by reducing sulphate aerosols under future co2 concentrations
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/9baa64e20a2e4349ae6c8aaa9e9e127f
work_keys_str_mv	AT toshihikotakemura returntodifferentclimatestatesbyreducingsulphateaerosolsunderfutureco2concentrations
_version_	1718393875808124928

Return to different climate states by reducing sulphate aerosols under future CO2 concentrations

Ejemplares similares