Cosmic ray decreases affect atmospheric aerosols and clouds
Close passages of coronal mass ejections from the sun are signaled at the Earth's surface by Forbush decreases in cosmic ray counts. We find that low clouds contain less liquid water following Forbush decreases, and for the most influential events the liquid water in the oceanic atmosphere can...
Published in: | Geophysical Research Letters |
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Online Access: | https://orbit.dtu.dk/en/publications/ca02fa5d-c926-4100-9671-de6b7eb9755a https://doi.org/10.1029/2009GL038429 |
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ftdtupubl:oai:pure.atira.dk:publications/ca02fa5d-c926-4100-9671-de6b7eb9755a 2024-05-12T07:52:13+00:00 Cosmic ray decreases affect atmospheric aerosols and clouds Svensmark, Henrik Bondo, Torsten Svensmark, J. 2009 https://orbit.dtu.dk/en/publications/ca02fa5d-c926-4100-9671-de6b7eb9755a https://doi.org/10.1029/2009GL038429 eng eng https://orbit.dtu.dk/en/publications/ca02fa5d-c926-4100-9671-de6b7eb9755a info:eu-repo/semantics/restrictedAccess Svensmark , H , Bondo , T & Svensmark , J 2009 , ' Cosmic ray decreases affect atmospheric aerosols and clouds ' , Geophysical Research Letters , vol. 36 , pp. L15101 . https://doi.org/10.1029/2009GL038429 /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2009 ftdtupubl https://doi.org/10.1029/2009GL038429 2024-04-17T14:49:18Z Close passages of coronal mass ejections from the sun are signaled at the Earth's surface by Forbush decreases in cosmic ray counts. We find that low clouds contain less liquid water following Forbush decreases, and for the most influential events the liquid water in the oceanic atmosphere can diminish by as much as 7%. Cloud water content as gauged by the Special Sensor Microwave/Imager (SSM/I) reaches a minimum ≈7 days after the Forbush minimum in cosmic rays, and so does the fraction of low clouds seen by the Moderate Resolution Imaging Spectroradiometer (MODIS) and in the International Satellite Cloud Climate Project (ISCCP). Parallel observations by the aerosol robotic network AERONET reveal falls in the relative abundance of fine aerosol particles which, in normal circumstances, could have evolved into cloud condensation nuclei. Thus a link between the sun, cosmic rays, aerosols, and liquid-water clouds appears to exist on a global scale. Article in Journal/Newspaper Aerosol Robotic Network Technical University of Denmark: DTU Orbit Geophysical Research Letters 36 15 n/a n/a |
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Open Polar |
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Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Svensmark, Henrik Bondo, Torsten Svensmark, J. Cosmic ray decreases affect atmospheric aerosols and clouds |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
Close passages of coronal mass ejections from the sun are signaled at the Earth's surface by Forbush decreases in cosmic ray counts. We find that low clouds contain less liquid water following Forbush decreases, and for the most influential events the liquid water in the oceanic atmosphere can diminish by as much as 7%. Cloud water content as gauged by the Special Sensor Microwave/Imager (SSM/I) reaches a minimum ≈7 days after the Forbush minimum in cosmic rays, and so does the fraction of low clouds seen by the Moderate Resolution Imaging Spectroradiometer (MODIS) and in the International Satellite Cloud Climate Project (ISCCP). Parallel observations by the aerosol robotic network AERONET reveal falls in the relative abundance of fine aerosol particles which, in normal circumstances, could have evolved into cloud condensation nuclei. Thus a link between the sun, cosmic rays, aerosols, and liquid-water clouds appears to exist on a global scale. |
format |
Article in Journal/Newspaper |
author |
Svensmark, Henrik Bondo, Torsten Svensmark, J. |
author_facet |
Svensmark, Henrik Bondo, Torsten Svensmark, J. |
author_sort |
Svensmark, Henrik |
title |
Cosmic ray decreases affect atmospheric aerosols and clouds |
title_short |
Cosmic ray decreases affect atmospheric aerosols and clouds |
title_full |
Cosmic ray decreases affect atmospheric aerosols and clouds |
title_fullStr |
Cosmic ray decreases affect atmospheric aerosols and clouds |
title_full_unstemmed |
Cosmic ray decreases affect atmospheric aerosols and clouds |
title_sort |
cosmic ray decreases affect atmospheric aerosols and clouds |
publishDate |
2009 |
url |
https://orbit.dtu.dk/en/publications/ca02fa5d-c926-4100-9671-de6b7eb9755a https://doi.org/10.1029/2009GL038429 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Svensmark , H , Bondo , T & Svensmark , J 2009 , ' Cosmic ray decreases affect atmospheric aerosols and clouds ' , Geophysical Research Letters , vol. 36 , pp. L15101 . https://doi.org/10.1029/2009GL038429 |
op_relation |
https://orbit.dtu.dk/en/publications/ca02fa5d-c926-4100-9671-de6b7eb9755a |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/2009GL038429 |
container_title |
Geophysical Research Letters |
container_volume |
36 |
container_issue |
15 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1798844665778143232 |