The influence of absorbed solar radiation by Saharan dust on hurricane genesis
To date, the radiative impact of dust and the Sahar an air layer (SAL) on North Atlantic hurricane activity is not yet known. According to previous studies, dust stabilizes the atmosphere due to absorption of solar radiation but thus shifts convection to regions more conducive for hurricane genesis....
Published in: | Journal of Geophysical Research: Atmospheres |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2015
|
Subjects: | |
Online Access: | https://boris.unibe.ch/71472/1/bretl15jgra.pdf https://boris.unibe.ch/71472/ |
id |
ftunivbern:oai:boris.unibe.ch:71472 |
---|---|
record_format |
openpolar |
spelling |
ftunivbern:oai:boris.unibe.ch:71472 2023-08-20T04:08:25+02:00 The influence of absorbed solar radiation by Saharan dust on hurricane genesis Bretl, Sebastian Reutter, Philipp Raible, Christoph C. Ferrachat, Sylvaine Poberaj, Christina Schnadt Revell, Laura E. Lohmann, Ulrike 2015-03-09 application/pdf https://boris.unibe.ch/71472/1/bretl15jgra.pdf https://boris.unibe.ch/71472/ eng eng American Geophysical Union https://boris.unibe.ch/71472/ info:eu-repo/semantics/openAccess Bretl, Sebastian; Reutter, Philipp; Raible, Christoph C.; Ferrachat, Sylvaine; Poberaj, Christina Schnadt; Revell, Laura E.; Lohmann, Ulrike (2015). The influence of absorbed solar radiation by Saharan dust on hurricane genesis. Journal of Geophysical Research: Atmospheres, 120(5), pp. 1902-1917. American Geophysical Union 10.1002/2014JD022441 <http://dx.doi.org/10.1002/2014JD022441> 530 Physics 550 Earth sciences & geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2015 ftunivbern https://doi.org/10.1002/2014JD022441 2023-07-31T21:19:38Z To date, the radiative impact of dust and the Sahar an air layer (SAL) on North Atlantic hurricane activity is not yet known. According to previous studies, dust stabilizes the atmosphere due to absorption of solar radiation but thus shifts convection to regions more conducive for hurricane genesis. Here we analyze differences in hurricane genesis and frequency from ensemble sensitivity simulations with radiatively active and inactive dust in the aerosol-climate model ECHAM6-HAM. We investigate dust burden and other hurricane-related variables and determine their influence on disturbances which develop into hurricanes (developing disturbances, DDs) and those which do not (nondeveloping disturbances, NDDs). Dust and the SAL are found to potentially have both inhibiting and supporting influences on background conditions for hurricane genesis. A slight southward shift of DDs is determined when dust is active as well as a significant warming of the SAL, which leads to a strengthening of the vertical circulation associated with the SAL. The dust burden of DDs is smaller in active dust simulations compared to DDs in simulations with inactive dust, while NDDs contain more dust in active dust simulations. However, no significant influence of radiatively active dust on other variables in DDs and NDDs is found. Furthermore, no substantial change in the DD and NDD frequency due to the radiative effects of dust can be detected. Article in Journal/Newspaper North Atlantic BORIS (Bern Open Repository and Information System, University of Bern) Journal of Geophysical Research: Atmospheres 120 5 1902 1917 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics 550 Earth sciences & geology |
spellingShingle |
530 Physics 550 Earth sciences & geology Bretl, Sebastian Reutter, Philipp Raible, Christoph C. Ferrachat, Sylvaine Poberaj, Christina Schnadt Revell, Laura E. Lohmann, Ulrike The influence of absorbed solar radiation by Saharan dust on hurricane genesis |
topic_facet |
530 Physics 550 Earth sciences & geology |
description |
To date, the radiative impact of dust and the Sahar an air layer (SAL) on North Atlantic hurricane activity is not yet known. According to previous studies, dust stabilizes the atmosphere due to absorption of solar radiation but thus shifts convection to regions more conducive for hurricane genesis. Here we analyze differences in hurricane genesis and frequency from ensemble sensitivity simulations with radiatively active and inactive dust in the aerosol-climate model ECHAM6-HAM. We investigate dust burden and other hurricane-related variables and determine their influence on disturbances which develop into hurricanes (developing disturbances, DDs) and those which do not (nondeveloping disturbances, NDDs). Dust and the SAL are found to potentially have both inhibiting and supporting influences on background conditions for hurricane genesis. A slight southward shift of DDs is determined when dust is active as well as a significant warming of the SAL, which leads to a strengthening of the vertical circulation associated with the SAL. The dust burden of DDs is smaller in active dust simulations compared to DDs in simulations with inactive dust, while NDDs contain more dust in active dust simulations. However, no significant influence of radiatively active dust on other variables in DDs and NDDs is found. Furthermore, no substantial change in the DD and NDD frequency due to the radiative effects of dust can be detected. |
format |
Article in Journal/Newspaper |
author |
Bretl, Sebastian Reutter, Philipp Raible, Christoph C. Ferrachat, Sylvaine Poberaj, Christina Schnadt Revell, Laura E. Lohmann, Ulrike |
author_facet |
Bretl, Sebastian Reutter, Philipp Raible, Christoph C. Ferrachat, Sylvaine Poberaj, Christina Schnadt Revell, Laura E. Lohmann, Ulrike |
author_sort |
Bretl, Sebastian |
title |
The influence of absorbed solar radiation by Saharan dust on hurricane genesis |
title_short |
The influence of absorbed solar radiation by Saharan dust on hurricane genesis |
title_full |
The influence of absorbed solar radiation by Saharan dust on hurricane genesis |
title_fullStr |
The influence of absorbed solar radiation by Saharan dust on hurricane genesis |
title_full_unstemmed |
The influence of absorbed solar radiation by Saharan dust on hurricane genesis |
title_sort |
influence of absorbed solar radiation by saharan dust on hurricane genesis |
publisher |
American Geophysical Union |
publishDate |
2015 |
url |
https://boris.unibe.ch/71472/1/bretl15jgra.pdf https://boris.unibe.ch/71472/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Bretl, Sebastian; Reutter, Philipp; Raible, Christoph C.; Ferrachat, Sylvaine; Poberaj, Christina Schnadt; Revell, Laura E.; Lohmann, Ulrike (2015). The influence of absorbed solar radiation by Saharan dust on hurricane genesis. Journal of Geophysical Research: Atmospheres, 120(5), pp. 1902-1917. American Geophysical Union 10.1002/2014JD022441 <http://dx.doi.org/10.1002/2014JD022441> |
op_relation |
https://boris.unibe.ch/71472/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2014JD022441 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
120 |
container_issue |
5 |
container_start_page |
1902 |
op_container_end_page |
1917 |
_version_ |
1774720664856428544 |