The Emission, Transport, and Impacts of the Extreme Saharan Dust Storm in 2015
Each summer, the Saharan Air Layer transports massive amounts of mineral dust across the Atlantic Ocean, affecting weather, climate, and public health over large areas. Despite the considerable impacts of African dust, the causes and impacts of extreme trans-Atlantic African dust events are not full...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070915 2024-02-11T10:06:11+01:00 The Emission, Transport, and Impacts of the Extreme Saharan Dust Storm in 2015 Harr, Brian Pu, Bing Jin, Qinjian 2024-01 electronic https://doi.org/10.5194/egusphere-2023-2896 https://noa.gwlb.de/receive/cop_mods_00070915 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069240/egusphere-2023-2896.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2896/egusphere-2023-2896.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-2896 https://noa.gwlb.de/receive/cop_mods_00070915 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069240/egusphere-2023-2896.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2896/egusphere-2023-2896.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-2896 2024-01-15T00:22:45Z Each summer, the Saharan Air Layer transports massive amounts of mineral dust across the Atlantic Ocean, affecting weather, climate, and public health over large areas. Despite the considerable impacts of African dust, the causes and impacts of extreme trans-Atlantic African dust events are not fully understood. The “Godzilla” trans-Atlantic dust event in 2020 has been extensively studied, but little is known about other similar events. Here we examine the June 2015 event, the second strongest trans-Atlantic African dust event during summers over 2003–2022. This event was characterized by moderately high dust emissions over western North Africa and an extremely high aerosol optical depth (AOD) over the tropical North Atlantic. The high dust loading over the Atlantic is associated with atmospheric circulation extremes like the “Godzilla” event. Both the African easterly jet (AEJ) and Caribbean low-level jet (CLLJ) are greatly intensified, along with a westward extension of the North Atlantic subtropical high (NASH), all of which favor the westward transport of African dust. The enhanced dust emissions are related to anomalously strong surface winds in dust source regions and reduced vegetation density and soil moisture over the northern Sahel. The dust plume reduced surface net shortwave radiation over the eastern tropical North Atlantic by about 25 W m-2 but increased net longwave flux by about 3 W m-2. In contrast to the “Godzilla” event, the 2015 event had minor air quality impacts on the U.S., partially due to the extremely intensified CLLJ that dispersed the dust plume to the Pacific. Article in Journal/Newspaper North Atlantic Niedersächsisches Online-Archiv NOA Nash ENVELOPE(-62.350,-62.350,-74.233,-74.233) Pacific |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Harr, Brian Pu, Bing Jin, Qinjian The Emission, Transport, and Impacts of the Extreme Saharan Dust Storm in 2015 |
topic_facet |
article Verlagsveröffentlichung |
description |
Each summer, the Saharan Air Layer transports massive amounts of mineral dust across the Atlantic Ocean, affecting weather, climate, and public health over large areas. Despite the considerable impacts of African dust, the causes and impacts of extreme trans-Atlantic African dust events are not fully understood. The “Godzilla” trans-Atlantic dust event in 2020 has been extensively studied, but little is known about other similar events. Here we examine the June 2015 event, the second strongest trans-Atlantic African dust event during summers over 2003–2022. This event was characterized by moderately high dust emissions over western North Africa and an extremely high aerosol optical depth (AOD) over the tropical North Atlantic. The high dust loading over the Atlantic is associated with atmospheric circulation extremes like the “Godzilla” event. Both the African easterly jet (AEJ) and Caribbean low-level jet (CLLJ) are greatly intensified, along with a westward extension of the North Atlantic subtropical high (NASH), all of which favor the westward transport of African dust. The enhanced dust emissions are related to anomalously strong surface winds in dust source regions and reduced vegetation density and soil moisture over the northern Sahel. The dust plume reduced surface net shortwave radiation over the eastern tropical North Atlantic by about 25 W m-2 but increased net longwave flux by about 3 W m-2. In contrast to the “Godzilla” event, the 2015 event had minor air quality impacts on the U.S., partially due to the extremely intensified CLLJ that dispersed the dust plume to the Pacific. |
format |
Article in Journal/Newspaper |
author |
Harr, Brian Pu, Bing Jin, Qinjian |
author_facet |
Harr, Brian Pu, Bing Jin, Qinjian |
author_sort |
Harr, Brian |
title |
The Emission, Transport, and Impacts of the Extreme Saharan Dust Storm in 2015 |
title_short |
The Emission, Transport, and Impacts of the Extreme Saharan Dust Storm in 2015 |
title_full |
The Emission, Transport, and Impacts of the Extreme Saharan Dust Storm in 2015 |
title_fullStr |
The Emission, Transport, and Impacts of the Extreme Saharan Dust Storm in 2015 |
title_full_unstemmed |
The Emission, Transport, and Impacts of the Extreme Saharan Dust Storm in 2015 |
title_sort |
emission, transport, and impacts of the extreme saharan dust storm in 2015 |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2023-2896 https://noa.gwlb.de/receive/cop_mods_00070915 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069240/egusphere-2023-2896.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2896/egusphere-2023-2896.pdf |
long_lat |
ENVELOPE(-62.350,-62.350,-74.233,-74.233) |
geographic |
Nash Pacific |
geographic_facet |
Nash Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://doi.org/10.5194/egusphere-2023-2896 https://noa.gwlb.de/receive/cop_mods_00070915 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00069240/egusphere-2023-2896.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2896/egusphere-2023-2896.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-2896 |
_version_ |
1790603729310842880 |