Cyclones enhance the transport of sea salt aerosols to the high atmosphere in the Southern Ocean
Cyclones are expected to increase the vertical transport of sea spray aerosols (SSAs), which may significantly impact the climate by increasing the population of cloud condensation nuclei (CCN) and the cloud droplet number concentration ( N d ). In this study, a high-time-resolution (1 h) aerosol mo...
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ftcopernicus:oai:publications.copernicus.org:egusphere111274 2023-10-25T01:44:04+02:00 Cyclones enhance the transport of sea salt aerosols to the high atmosphere in the Southern Ocean Shi, Jun Yan, Jinpei Wang, Shanshan Zhao, Shuhui Zhang, Miming Xu, Suqing Lin, Qi Yang, Hang Dai, Siying 2023-09-19 application/pdf https://doi.org/10.5194/egusphere-2023-896 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-896/ eng eng doi:10.5194/egusphere-2023-896 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-896/ eISSN: Text 2023 ftcopernicus https://doi.org/10.5194/egusphere-2023-896 2023-09-25T16:24:15Z Cyclones are expected to increase the vertical transport of sea spray aerosols (SSAs), which may significantly impact the climate by increasing the population of cloud condensation nuclei (CCN) and the cloud droplet number concentration ( N d ). In this study, a high-time-resolution (1 h) aerosol monitoring was carried out in the middle and high Southern Hemisphere from 23 February to 4 March 2018. The characteristics of SSAs during three cyclones were observed during the cruise. The results showed that SSA level in the low atmosphere did not increase with the wind speed during cyclone processes, which was different from the anticipated scenario that SSA concentration would increase with wind speed. However, the size of SSA particles during cyclones was larger than that in the no-cyclone periods. It seems that the generation of SSAs was enhanced during cyclones, but SSA concentration near the sea surface increased scarcely. The upward-transport proportion was calculated according to the wind stress and sea salt flux between cyclone and non-cyclone periods. It indicated that more than 23.4 % of the SSAs were transported upwards by cyclone processes during event 1, and 36.2 % and 38.9 % were transported upwards in event 2 and event 3, respectively. The upward transport of SSAs was the main reason why SSA concentration did not increase in the low atmosphere. The transport of SSAs to the high atmosphere during cyclones may additionally increase the CCN burden in the marine boundary layer, which may affect the regional climate. This study highlights the importance of SSA transport to the high atmosphere by cyclones and extends the knowledge of SSA generation and the impact factor during the cyclone period in marine atmosphere. Text Southern Ocean Copernicus Publications: E-Journals Southern Ocean |
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Copernicus Publications: E-Journals |
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English |
description |
Cyclones are expected to increase the vertical transport of sea spray aerosols (SSAs), which may significantly impact the climate by increasing the population of cloud condensation nuclei (CCN) and the cloud droplet number concentration ( N d ). In this study, a high-time-resolution (1 h) aerosol monitoring was carried out in the middle and high Southern Hemisphere from 23 February to 4 March 2018. The characteristics of SSAs during three cyclones were observed during the cruise. The results showed that SSA level in the low atmosphere did not increase with the wind speed during cyclone processes, which was different from the anticipated scenario that SSA concentration would increase with wind speed. However, the size of SSA particles during cyclones was larger than that in the no-cyclone periods. It seems that the generation of SSAs was enhanced during cyclones, but SSA concentration near the sea surface increased scarcely. The upward-transport proportion was calculated according to the wind stress and sea salt flux between cyclone and non-cyclone periods. It indicated that more than 23.4 % of the SSAs were transported upwards by cyclone processes during event 1, and 36.2 % and 38.9 % were transported upwards in event 2 and event 3, respectively. The upward transport of SSAs was the main reason why SSA concentration did not increase in the low atmosphere. The transport of SSAs to the high atmosphere during cyclones may additionally increase the CCN burden in the marine boundary layer, which may affect the regional climate. This study highlights the importance of SSA transport to the high atmosphere by cyclones and extends the knowledge of SSA generation and the impact factor during the cyclone period in marine atmosphere. |
format |
Text |
author |
Shi, Jun Yan, Jinpei Wang, Shanshan Zhao, Shuhui Zhang, Miming Xu, Suqing Lin, Qi Yang, Hang Dai, Siying |
spellingShingle |
Shi, Jun Yan, Jinpei Wang, Shanshan Zhao, Shuhui Zhang, Miming Xu, Suqing Lin, Qi Yang, Hang Dai, Siying Cyclones enhance the transport of sea salt aerosols to the high atmosphere in the Southern Ocean |
author_facet |
Shi, Jun Yan, Jinpei Wang, Shanshan Zhao, Shuhui Zhang, Miming Xu, Suqing Lin, Qi Yang, Hang Dai, Siying |
author_sort |
Shi, Jun |
title |
Cyclones enhance the transport of sea salt aerosols to the high atmosphere in the Southern Ocean |
title_short |
Cyclones enhance the transport of sea salt aerosols to the high atmosphere in the Southern Ocean |
title_full |
Cyclones enhance the transport of sea salt aerosols to the high atmosphere in the Southern Ocean |
title_fullStr |
Cyclones enhance the transport of sea salt aerosols to the high atmosphere in the Southern Ocean |
title_full_unstemmed |
Cyclones enhance the transport of sea salt aerosols to the high atmosphere in the Southern Ocean |
title_sort |
cyclones enhance the transport of sea salt aerosols to the high atmosphere in the southern ocean |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-896 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-896/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2023-896 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-896/ |
op_doi |
https://doi.org/10.5194/egusphere-2023-896 |
_version_ |
1780741395163643904 |