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dc.contributor.author
Huang, Wan Ting Katty
dc.contributor.author
Schnadt Poberaj, Christina
dc.contributor.author
Enz, Bernhard
dc.contributor.author
Horat, Christoph
dc.contributor.author
Lohmann, Ulrike
dc.date.accessioned
2021-01-11T09:55:00Z
dc.date.available
2020-12-24T03:40:40Z
dc.date.available
2021-01-11T09:55:00Z
dc.date.issued
2020-12-15
dc.identifier.issn
0894-8755
dc.identifier.issn
1520-0442
dc.identifier.other
10.1175/JCLI-D-19-0854.1
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/458485
dc.description.abstract
We investigate the circumstances under which the Saharan air layer (SAL) has a negative impact on the intensification of tropical cyclones (TCs) over the North Atlantic Ocean. Using hurricane tracking, aerosol optical depth (AOD) data, and meteorological analyses, we analyze the interaction of the SAL with 52 named TCs that formed over the east and central Atlantic south of the Cape Verde islands between 2004 and 2017. Following the categorization of negative SAL influences on TC intensification by Dunion and Velden, only 21% of the investigated storms can be classified (28% of all storms that encountered the SAL), and 21% of the storms continue to intensify despite the presence of the SAL. We show that among TCs that encounter the SAL, there is evidence supporting a weak negative correlation between the magnitude of TC intensification and the ambient AOD. However, above-average Saharan dust abundance in the vicinity of TCs is not a good independent indicator for storm nonintensification. To better understand the specific processes involved, a composite study is carried out, contrasting storms that intensify in the presence of the SAL against those that do not. We find that sheared air masses on the north side and drier air from the northeast of the storm early on during its lifetime, in addition to higher AOD, are associated with TC nonintensification in proximity to the SAL. © 2020 American Meteorological Society.
en_US
dc.language.iso
en
en_US
dc.publisher
American Meteorological Society
en_US
dc.subject
Tropics
en_US
dc.subject
Wind shear
en_US
dc.subject
Dust or dust storms
en_US
dc.subject
Tropical cyclones
en_US
dc.subject
Humidity
en_US
dc.title
When Does the Saharan Air Layer Impede the Intensification of Tropical Cyclones?
en_US
dc.type
Journal Article
dc.date.published
2020-11-17
ethz.journal.title
Journal of Climate
ethz.journal.volume
33
en_US
ethz.journal.issue
24
en_US
ethz.journal.abbreviated
J. climate
ethz.pages.start
10609
en_US
ethz.pages.end
10626
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Boston, MA
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03690 - Lohmann, Ulrike / Lohmann, Ulrike
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02717 - Institut für Atmosphäre und Klima / Inst. Atmospheric and Climate Science::03690 - Lohmann, Ulrike / Lohmann, Ulrike
ethz.date.deposited
2020-12-24T03:40:45Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-01-11T09:55:08Z
ethz.rosetta.lastUpdated
2022-03-29T04:46:17Z
ethz.rosetta.versionExported
true
ethz.COinS
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