Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds
[1] Observations indicate that the westerly jet in the Southern Hemisphere troposphere is accelerating. Using a global aerosol model we estimate that the increase in wind speed of 0.45 ± 0.2 m s 1 decade 1 at 50–65°S since the early 1980s caused a higher sea spray flux, resulting in an increase of c...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.394.6396 2023-05-15T14:04:16+02:00 Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds Hannele Korhonen Kenneth S. Carslaw Piers M. Forster Santtu Mikkonen Neil D. Gordon Harri Kokkola K. S. Carslaw S. Mikkonen N. D. Gordon H. Kokkola The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.394.6396 http://eprints.whiterose.ac.uk/43210/2/GRL_2009GL041320,2010.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.394.6396 http://eprints.whiterose.ac.uk/43210/2/GRL_2009GL041320,2010.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://eprints.whiterose.ac.uk/43210/2/GRL_2009GL041320,2010.pdf text ftciteseerx 2016-01-08T02:24:55Z [1] Observations indicate that the westerly jet in the Southern Hemisphere troposphere is accelerating. Using a global aerosol model we estimate that the increase in wind speed of 0.45 ± 0.2 m s 1 decade 1 at 50–65°S since the early 1980s caused a higher sea spray flux, resulting in an increase of cloud condensation nucleus concentrations of more than 85 % in some regions, and of 22 % on average between 50 and 65°S. These fractional increases are similar in magnitude to the decreases over many northern hemisphere land areas due to changes in air pollution over the same period. The change in cloud drop concentrations causes an increase in cloud reflectivity and a summertime radiative forcing between at 50 and 65°S comparable in magnitude but acting against that from greenhouse gas forcing over the same time period, and thus represents a substantial negative climate feedback. However, recovery of Antarctic ozone depletion in the next two decades will likely cause a fall in wind speeds, a decrease in cloud drop concentration and a correspondingly weaker Text Antarc* Antarctic Unknown Antarctic |
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[1] Observations indicate that the westerly jet in the Southern Hemisphere troposphere is accelerating. Using a global aerosol model we estimate that the increase in wind speed of 0.45 ± 0.2 m s 1 decade 1 at 50–65°S since the early 1980s caused a higher sea spray flux, resulting in an increase of cloud condensation nucleus concentrations of more than 85 % in some regions, and of 22 % on average between 50 and 65°S. These fractional increases are similar in magnitude to the decreases over many northern hemisphere land areas due to changes in air pollution over the same period. The change in cloud drop concentrations causes an increase in cloud reflectivity and a summertime radiative forcing between at 50 and 65°S comparable in magnitude but acting against that from greenhouse gas forcing over the same time period, and thus represents a substantial negative climate feedback. However, recovery of Antarctic ozone depletion in the next two decades will likely cause a fall in wind speeds, a decrease in cloud drop concentration and a correspondingly weaker |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Hannele Korhonen Kenneth S. Carslaw Piers M. Forster Santtu Mikkonen Neil D. Gordon Harri Kokkola K. S. Carslaw S. Mikkonen N. D. Gordon H. Kokkola |
spellingShingle |
Hannele Korhonen Kenneth S. Carslaw Piers M. Forster Santtu Mikkonen Neil D. Gordon Harri Kokkola K. S. Carslaw S. Mikkonen N. D. Gordon H. Kokkola Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds |
author_facet |
Hannele Korhonen Kenneth S. Carslaw Piers M. Forster Santtu Mikkonen Neil D. Gordon Harri Kokkola K. S. Carslaw S. Mikkonen N. D. Gordon H. Kokkola |
author_sort |
Hannele Korhonen |
title |
Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds |
title_short |
Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds |
title_full |
Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds |
title_fullStr |
Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds |
title_full_unstemmed |
Aerosol climate feedback due to decadal increases in Southern Hemisphere wind speeds |
title_sort |
aerosol climate feedback due to decadal increases in southern hemisphere wind speeds |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.394.6396 http://eprints.whiterose.ac.uk/43210/2/GRL_2009GL041320,2010.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
http://eprints.whiterose.ac.uk/43210/2/GRL_2009GL041320,2010.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.394.6396 http://eprints.whiterose.ac.uk/43210/2/GRL_2009GL041320,2010.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766275294637850624 |