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dc.contributor.authorStoll, Johannes Patrick
dc.contributor.authorGrand Graversen, Rune
dc.contributor.authorMessori, Gabriele
dc.date.accessioned2023-01-26T13:13:38Z
dc.date.available2023-01-26T13:13:38Z
dc.date.issued2022
dc.description.abstractThe global atmospheric circulation is fundamental for the local weather and climate by redistributing energy and moisture. To the present day, there is a knowledge gap at which spatial scales the energy and its components are transported. Therefore, we separate the meridional atmospheric energy transport in the ERA5 reanalysis by the spatial scales, the quasi-stationary and transient flow patterns, and the latent and dry-static component. We focus on the annual and seasonal mean in the transport components as well as their inter-annual variability. Motivated by similarities across latitudes in the atmospheric transport spectra when displayed as function of wavelength, we refine the existing scale separation method to be based on wavelength instead of wavenumber. This reveals advantageous, as the following conclusions can be drawn, which are fairly similar in the two hemispheres. Transport by synoptic waves, defined at wavelengths between 2,000 and 8,000 km, is the largest contributor to extra-tropical energy and moisture transport, is mainly of transient character, and is little influenced by seasonality. In contrast, the transport by planetary waves, larger than 8,000 km, highly depends on the season and has two distinct characteristics. (1) In the extra-tropical winter, planetary waves are of major importance due to transport of dry-static energy. This planetary transport feature the largest inter-annual variability, and is mainly quasi-stationary in the Northern Hemisphere, but transient in its southern counterpart. (2) In the subtropical summer, quasi-stationary planetary waves are the most important transport component mainly due to advection of moisture, which is associated with monsoons. In contrast to transport by planetary and synoptic waves, only a negligible amount of energy is transported by mesoscale eddies (< 2,000 km).en_US
dc.descriptionSource at <a href=https://www.weather-climate-dynamics.net/>https://www.weather-climate-dynamics.net/</a>.en_US
dc.identifier.citationStoll, Grand Graversen, Messori. The global atmospheric energy transport analysed by a wavelength-based scale separation. Weather and Climate Dynamics (WCD). 2022en_US
dc.identifier.cristinIDFRIDAID 2093156
dc.identifier.doi10.5194/wcd-2022-26
dc.identifier.issn2698-4016
dc.identifier.urihttps://hdl.handle.net/10037/28393
dc.language.isoengen_US
dc.publisherEuropean Geosciences Union (EGU)en_US
dc.relation.journalWeather and Climate Dynamics (WCD)
dc.relation.projectIDNorges forskningsråd: 314570en_US
dc.relation.projectIDNorges forskningsråd: 280727en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleThe global atmospheric energy transport analysed by a wavelength-based scale separationen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Med mindre det står noe annet, er denne innførselens lisens beskrevet som Attribution 4.0 International (CC BY 4.0)