Saharan dust particles nucleate droplets in eastern Atlantic clouds
Many soil-derived particles dominated by insoluble material, including Saharan dusts, are known to act as ice nuclei. If, however, dust particles can compete with other atmospheric particle types to form liquid cloud droplets, they have a greater potential to change climate through indirect effects...
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ftoregonstate:ir.library.oregonstate.edu:x633f248w 2024-09-15T18:23:11+00:00 Saharan dust particles nucleate droplets in eastern Atlantic clouds Twohy, Cynthia Kreidenweis, Sonia M. Eidhammer, Trude Browell, Edward V. Heymsfield, Andrew J. Bansemer, Aaron R. Anderson, Bruce E. Chen, Gao Ismail, Syed DeMott, Paul J. Van Den Heever, Susan C. https://ir.library.oregonstate.edu/concern/articles/x633f248w English [eng] eng unknown American Geophysical Union https://ir.library.oregonstate.edu/concern/articles/x633f248w Copyright Not Evaluated Article ftoregonstate 2024-07-22T18:06:03Z Many soil-derived particles dominated by insoluble material, including Saharan dusts, are known to act as ice nuclei. If, however, dust particles can compete with other atmospheric particle types to form liquid cloud droplets, they have a greater potential to change climate through indirect effects on cloud radiative properties and to affect the hydrological cycle through precipitation changes. By directly collecting and analyzing the residual nuclei of small cloud droplets, we demonstrate that Saharan dust particles do commonly act as cloud condensation nuclei (CCN) in the eastern North Atlantic. Droplet activation calculations support the measurements by showing that due to its slightly hygroscopic nature, even submicron dust can be important as CCN. Given the dual nature of Saharan dust particles as CCN and ice nuclei, this infusion of dust is expected to impact not only droplet size and albedo in small clouds, but ice formation in deep convective clouds. Article in Journal/Newspaper North Atlantic ScholarsArchive@OSU (Oregon State University) |
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ScholarsArchive@OSU (Oregon State University) |
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ftoregonstate |
language |
English unknown |
description |
Many soil-derived particles dominated by insoluble material, including Saharan dusts, are known to act as ice nuclei. If, however, dust particles can compete with other atmospheric particle types to form liquid cloud droplets, they have a greater potential to change climate through indirect effects on cloud radiative properties and to affect the hydrological cycle through precipitation changes. By directly collecting and analyzing the residual nuclei of small cloud droplets, we demonstrate that Saharan dust particles do commonly act as cloud condensation nuclei (CCN) in the eastern North Atlantic. Droplet activation calculations support the measurements by showing that due to its slightly hygroscopic nature, even submicron dust can be important as CCN. Given the dual nature of Saharan dust particles as CCN and ice nuclei, this infusion of dust is expected to impact not only droplet size and albedo in small clouds, but ice formation in deep convective clouds. |
format |
Article in Journal/Newspaper |
author |
Twohy, Cynthia Kreidenweis, Sonia M. Eidhammer, Trude Browell, Edward V. Heymsfield, Andrew J. Bansemer, Aaron R. Anderson, Bruce E. Chen, Gao Ismail, Syed DeMott, Paul J. Van Den Heever, Susan C. |
spellingShingle |
Twohy, Cynthia Kreidenweis, Sonia M. Eidhammer, Trude Browell, Edward V. Heymsfield, Andrew J. Bansemer, Aaron R. Anderson, Bruce E. Chen, Gao Ismail, Syed DeMott, Paul J. Van Den Heever, Susan C. Saharan dust particles nucleate droplets in eastern Atlantic clouds |
author_facet |
Twohy, Cynthia Kreidenweis, Sonia M. Eidhammer, Trude Browell, Edward V. Heymsfield, Andrew J. Bansemer, Aaron R. Anderson, Bruce E. Chen, Gao Ismail, Syed DeMott, Paul J. Van Den Heever, Susan C. |
author_sort |
Twohy, Cynthia |
title |
Saharan dust particles nucleate droplets in eastern Atlantic clouds |
title_short |
Saharan dust particles nucleate droplets in eastern Atlantic clouds |
title_full |
Saharan dust particles nucleate droplets in eastern Atlantic clouds |
title_fullStr |
Saharan dust particles nucleate droplets in eastern Atlantic clouds |
title_full_unstemmed |
Saharan dust particles nucleate droplets in eastern Atlantic clouds |
title_sort |
saharan dust particles nucleate droplets in eastern atlantic clouds |
publisher |
American Geophysical Union |
url |
https://ir.library.oregonstate.edu/concern/articles/x633f248w |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/x633f248w |
op_rights |
Copyright Not Evaluated |
_version_ |
1810463327242944512 |