From Internal Variability to Aerosol Effects: Physical Mechanisms Behind Observed Decadal Trends in Surface Solar Radiation in the Western Pacific Ocean
dc.contributor.author
Ferreira Correa, Lucas
dc.contributor.author
Folini, Doris
dc.contributor.author
Chtirkova, Boriana
dc.contributor.author
Wild, Martin
dc.date.accessioned
2024-09-23T11:43:51Z
dc.date.available
2024-09-23T06:08:11Z
dc.date.available
2024-09-23T11:43:51Z
dc.date.issued
2024-09-28
dc.identifier.issn
0148-0227
dc.identifier.issn
2169-897X
dc.identifier.other
10.1029/2024JD041014
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/695391
dc.identifier.doi
10.3929/ethz-b-000695391
dc.description.abstract
The Pacific Ocean, spanning over 30% of the Earth's surface, provides an ideal setting for studying the surface radiative balance due to its relatively pristine atmospheric conditions, far from anthropogenic emission sources. In this study we investigated the causes for the decadal trends of surface solar radiation (SSR) observed at eight stations scattered across seven islands in the Western Pacific Ocean, and extrapolated the results to the whole Western Pacific region based on the understanding of physical processes. Our results show a contrast between the causes for SSR trends in the northwestern and in the southwestern Pacific. In the Southwestern Pacific region, changes in cloud cover play a major role in the SSR decadal trends and interannual variability. The cloud cover in these areas is strongly associated with sea surface temperature (SST) anomalies, especially those induced by El Nino Southern Oscillation (ENSO) and the Interdecadal Pacific Oscillation (IPO). Modes of variability such as ENSO and IPO affect evaporation and convection, impacting the large-scale dynamics of the atmosphere, therefore influencing the distribution of the regions of deep convection. This consecutively impacts the cloud cover on a regional level and therefore SSR. In the Northern Hemisphere, conversely, a strong influence of these modes on cloudiness and SSR was not found. Instead, indirect evidence suggests that anthropogenic aerosol transported from Eastern Asia plays a major role in the decadal SSR trends. These results contribute to an improved understanding of the physical processes relevant for the long-term SSR trends in remote regions.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Geophysical Union
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc/4.0/
dc.title
From Internal Variability to Aerosol Effects: Physical Mechanisms Behind Observed Decadal Trends in Surface Solar Radiation in the Western Pacific Ocean
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial 4.0 International
dc.date.published
2024-09-18
ethz.journal.title
Journal of Geophysical Research: Atmospheres
ethz.journal.volume
129
en_US
ethz.journal.issue
18
en_US
ethz.journal.abbreviated
J. geophys. res., Atmos.
ethz.pages.start
e2024JD041014
en_US
ethz.size
23 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Towards an improved understanding of the Global Energy Balance: causes of decadal changes of solar radiation
en_US
ethz.identifier.wos
ethz.identifier.scopus
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::03778 - Seneviratne, Sonia / Seneviratne, Sonia
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::03778 - Seneviratne, Sonia / Seneviratne, Sonia
ethz.grant.agreementno
188601
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
Projekte MINT
ethz.date.deposited
2024-09-23T06:08:20Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2024-09-23T11:43:52Z
ethz.rosetta.lastUpdated
2025-02-14T14:01:19Z
ethz.rosetta.versionExported
true
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