Vis enkel innførsel

dc.contributor.authorBoljka, Lina
dc.contributor.authorBethke, Ingo
dc.contributor.authorTao, Dandan
dc.contributor.authorLi, Camille
dc.date.accessioned2024-12-04T14:19:13Z
dc.date.available2024-12-04T14:19:13Z
dc.date.created2024-10-11T14:24:44Z
dc.date.issued2024
dc.identifier.issn1530-261X
dc.identifier.urihttps://hdl.handle.net/11250/3168228
dc.description.abstractClimate models exhibit biases in the mean state and in variability across different regions of the Earth. For example, atmosphere-only models have a poleward bias in summertime jet streams across the Northern Hemisphere (NH). This can result from many processes, including misrepresentation of Rossby waves that can propagate in different directions and thereby interact with jet streams. However, Rossby-wave biases can result from biased background state of the climate system as well. The propagation speed of Rossby waves depends on jet stream strength, thus a poleward displacement of the jet stream can hinder westward propagation of Rossby waves at higher latitudes and displace eastward propagating Rossby waves (downstream development). These biases then impact other regions resulting in biased atmospheric circulation across the NH. Indeed, in this study we confirm this via regional nudging experiments within the Norwegian Earth System Model. Namely, nudged horizontal winds over the North Pacific can improve Rossby wave statistics and thereby atmospheric circulation over Eurasia (i.e., upstream). However, nudging over the North Atlantic has little effect on boreal summer atmospheric circulation. This implies that improving biases over the North Pacific is crucial for a better representation of modelled boreal summer circulation over Eurasia.en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleUpstream influence of midlatitude jet stream biases in boreal summeren_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright 2024 the authorsen_US
dc.source.articlenumbere1272en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1
dc.identifier.doi10.1002/asl.1272
dc.identifier.cristin2311412
dc.source.journalAtmospheric Science Lettersen_US
dc.relation.projectNorges forskningsråd: 309562en_US
dc.relation.projectTrond Mohn stiftelse: BFS2018TMT01en_US
dc.relation.projectSigma2: NS9039Ken_US
dc.relation.projectSigma2: NN9039Ken_US
dc.identifier.citationAtmospheric Science Letters. 2024, 25 (12), e1272.en_US
dc.source.volume25en_US
dc.source.issue12en_US


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel

Navngivelse 4.0 Internasjonal
Med mindre annet er angitt, så er denne innførselen lisensiert som Navngivelse 4.0 Internasjonal