Local and remote mean and extreme temperature response to regional aerosol emissions reductions
The climatic implications of regional aerosol and precursor emissions reductions implemented to protect human health are poorly understood. We investigate the mean and extreme temperature response to regional changes in aerosol emissions using three coupled chemistry-climate models: NOAA GFDL CM3, N...
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ftncar:oai:drupal-site.org:articles_23200 2024-04-28T08:08:14+00:00 Local and remote mean and extreme temperature response to regional aerosol emissions reductions Westervelt, Daniel M. (author) Mascioli, Nora R. (author) Fiore, Arlene M. (author) Conley, Andrew J. (author) Lamarque, Jean-François (author) Shindell, Drew T. (author) Faluvegi, Greg (author) Previdi, Michael (author) Correa, Gustavo (author) Horowitz, Larry W. (author) 2020-03-12 https://doi.org/10.5194/acp-20-3009-2020 en eng Atmospheric Chemistry and Physics--Atmos. Chem. Phys.--1680-7324 articles:23200 ark:/85065/d7988b6j doi:10.5194/acp-20-3009-2020 Copyright 2020 Author(s). This work is licensed under a Creative Commons Attribution 4.0 International license. article Text 2020 ftncar https://doi.org/10.5194/acp-20-3009-2020 2024-04-04T17:35:13Z The climatic implications of regional aerosol and precursor emissions reductions implemented to protect human health are poorly understood. We investigate the mean and extreme temperature response to regional changes in aerosol emissions using three coupled chemistry-climate models: NOAA GFDL CM3, NCAR CESM1, and NASA GISS-E2. Our approach contrasts a long present-day control simulation from each model (up to 400 years with perpetual year 2000 or 2005 emissions) with 14 individual aerosol emissions perturbation simulations (160-240 years each). We perturb emissions of sulfur dioxide (SO2) and/or carbonaceous aerosol within six world regions and assess the statistical significance of mean and extreme temperature responses relative to internal variability determined by the control simulation and across the models. In all models, the global mean surface temperature response (perturbation minus control) to SO2 and/or carbonaceous aerosol is mostly positive (warming) and statistically significant and ranges from +0.17 K (Europe SO2) to -0.06 K (US BC). The warming response to SO2 reductions is strongest in the US and Europe perturbation simulations, both globally and regionally, with Arctic warming up to 1 K due to a removal of European anthropogenic SO2 emissions alone; however, even emissions from regions remote to the Arctic, such as SO2 from India, significantly warm the Arctic by up to 0.5 K. Arctic warming is the most robust response across each model and several aerosol emissions perturbations. The temperature response in the Northern Hemisphere midlatitudes is most sensitive to emissions perturbations within that region. In the tropics, however, the temperature response to emissions perturbations is roughly the same in magnitude as emissions perturbations either within or outside of the tropics. We find that climate sensitivity to regional aerosol perturbations ranges from 0.5 to 1.0 K (Wm(-2))(-1) depending on the region and aerosol composition and is larger than the climate sensitivity to a doubling of CO2 ... Article in Journal/Newspaper Arctic Human health OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Atmospheric Chemistry and Physics 20 5 3009 3027 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The climatic implications of regional aerosol and precursor emissions reductions implemented to protect human health are poorly understood. We investigate the mean and extreme temperature response to regional changes in aerosol emissions using three coupled chemistry-climate models: NOAA GFDL CM3, NCAR CESM1, and NASA GISS-E2. Our approach contrasts a long present-day control simulation from each model (up to 400 years with perpetual year 2000 or 2005 emissions) with 14 individual aerosol emissions perturbation simulations (160-240 years each). We perturb emissions of sulfur dioxide (SO2) and/or carbonaceous aerosol within six world regions and assess the statistical significance of mean and extreme temperature responses relative to internal variability determined by the control simulation and across the models. In all models, the global mean surface temperature response (perturbation minus control) to SO2 and/or carbonaceous aerosol is mostly positive (warming) and statistically significant and ranges from +0.17 K (Europe SO2) to -0.06 K (US BC). The warming response to SO2 reductions is strongest in the US and Europe perturbation simulations, both globally and regionally, with Arctic warming up to 1 K due to a removal of European anthropogenic SO2 emissions alone; however, even emissions from regions remote to the Arctic, such as SO2 from India, significantly warm the Arctic by up to 0.5 K. Arctic warming is the most robust response across each model and several aerosol emissions perturbations. The temperature response in the Northern Hemisphere midlatitudes is most sensitive to emissions perturbations within that region. In the tropics, however, the temperature response to emissions perturbations is roughly the same in magnitude as emissions perturbations either within or outside of the tropics. We find that climate sensitivity to regional aerosol perturbations ranges from 0.5 to 1.0 K (Wm(-2))(-1) depending on the region and aerosol composition and is larger than the climate sensitivity to a doubling of CO2 ... |
author2 |
Westervelt, Daniel M. (author) Mascioli, Nora R. (author) Fiore, Arlene M. (author) Conley, Andrew J. (author) Lamarque, Jean-François (author) Shindell, Drew T. (author) Faluvegi, Greg (author) Previdi, Michael (author) Correa, Gustavo (author) Horowitz, Larry W. (author) |
format |
Article in Journal/Newspaper |
title |
Local and remote mean and extreme temperature response to regional aerosol emissions reductions |
spellingShingle |
Local and remote mean and extreme temperature response to regional aerosol emissions reductions |
title_short |
Local and remote mean and extreme temperature response to regional aerosol emissions reductions |
title_full |
Local and remote mean and extreme temperature response to regional aerosol emissions reductions |
title_fullStr |
Local and remote mean and extreme temperature response to regional aerosol emissions reductions |
title_full_unstemmed |
Local and remote mean and extreme temperature response to regional aerosol emissions reductions |
title_sort |
local and remote mean and extreme temperature response to regional aerosol emissions reductions |
publishDate |
2020 |
url |
https://doi.org/10.5194/acp-20-3009-2020 |
genre |
Arctic Human health |
genre_facet |
Arctic Human health |
op_relation |
Atmospheric Chemistry and Physics--Atmos. Chem. Phys.--1680-7324 articles:23200 ark:/85065/d7988b6j doi:10.5194/acp-20-3009-2020 |
op_rights |
Copyright 2020 Author(s). This work is licensed under a Creative Commons Attribution 4.0 International license. |
op_doi |
https://doi.org/10.5194/acp-20-3009-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
5 |
container_start_page |
3009 |
op_container_end_page |
3027 |
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1797577101133479936 |