FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4311551481> ?p ?o ?g. }

• W4311551481 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Weather regimes govern an important part of the sub-seasonal variability of the mid-latitude circulation. Due to their role in weather extremes and atmospheric predictability, regimes that feature a blocking anticyclone are of particular interest. This study investigates the dynamics of these ''blocked'' regimes in the North Atlantic-European region from a year-round perspective. For a comprehensive diagnostic, we combine wave activity concepts and a piecewise potential-vorticity (PV) tendency framework. The latter essentially quantifies the well-established PV perspective of mid-latitude dynamics. All blocked regimes during the 1979–2021 period of ERA5 reanalysis are considered. Wave activity characteristics exhibit distinct differences between blocked regimes. After regime onset, one regime (Greenland Blocking) is associated with a suppression of wave activity flux, whereas two other regimes (Atlantic Ridge and European Blocking) are associated with a northward deflection of the flux without a clear net change. During onset, the envelope of Rossby wave activity retracts upstream for Greenland Blocking, whereas the envelope extends downstream for Atlantic Ridge and European Blocking. The fourth regime (Scandinavian Blocking) exhibits intermediate wave activity characteristics. From the perspective of piecewise PV tendencies projected onto the respective regime pattern, the dynamics that govern regime onset exhibit a large degree of similarity: Linear Rossby wave dynamics and nonlinear eddy PV fluxes dominate and are of approximately equal relative importance, whereas baroclinic coupling and divergent amplification make minor contributions. Most strikingly, all blocked regimes exhibit very similar (intra-regime) variability: a retrograde and an upstream pathway to regime onset. The retrograde pathway is dominated by nonlinear PV eddy fluxes, whereas the upstream pathway is dominated by linear Rossby wave dynamics. Importantly, there is a large degree of cancellation between the two pathways for some of the mechanisms before regime onset. The physical meaning of a regime-mean perspective before onset can thus be severely limited. Implications of our results for understanding predictability of blocked regimes are discussed. We further discuss the limitations of projected tendencies in capturing the importance of moist processes, which tend to occur at the fringes or outside of the regime pattern. Finally, we stress that this study investigate the variability of the governing dynamics without prior empirical stratification of data by season or by type of regime transition. We demonstrate, however, that our dynamics-centered approach does not map predominantly on variability that is associated with these factors. The main modes of dynamical variability revealed herein, and the large similarity of the blocked regimes in exhibiting this variability are thus significant results." @default.
• W4311551481 created "2022-12-27" @default.
• W4311551481 date "2022-12-15" @default.
• W4311551481 modified "2023-10-14" @default.
• W4311551481 title "Comment on wcd-2022-56" @default.
• W4311551481 doi "https://doi.org/10.5194/wcd-2022-56-rc2" @default.
• W4311551481 hasPublicationYear "2022" @default.
• W4311551481 type Work @default.
• W4311551481 citedByCount "0" @default.
• W4311551481 crossrefType "peer-review" @default.
• W4311551481 hasBestOaLocation W43115514811 @default.
• W4311551481 hasConcept C121332964 @default.
• W4311551481 hasConcept C127313418 @default.
• W4311551481 hasConcept C140820882 @default.
• W4311551481 hasConcept C145151356 @default.
• W4311551481 hasConcept C153294291 @default.
• W4311551481 hasConcept C157331469 @default.
• W4311551481 hasConcept C18101618 @default.
• W4311551481 hasConcept C197640229 @default.
• W4311551481 hasConcept C200114574 @default.
• W4311551481 hasConcept C49204034 @default.
• W4311551481 hasConcept C53631411 @default.
• W4311551481 hasConcept C62520636 @default.
• W4311551481 hasConcept C67320510 @default.
• W4311551481 hasConcept C91586092 @default.
• W4311551481 hasConceptScore W4311551481C121332964 @default.
• W4311551481 hasConceptScore W4311551481C127313418 @default.
• W4311551481 hasConceptScore W4311551481C140820882 @default.
• W4311551481 hasConceptScore W4311551481C145151356 @default.
• W4311551481 hasConceptScore W4311551481C153294291 @default.
• W4311551481 hasConceptScore W4311551481C157331469 @default.
• W4311551481 hasConceptScore W4311551481C18101618 @default.
• W4311551481 hasConceptScore W4311551481C197640229 @default.
• W4311551481 hasConceptScore W4311551481C200114574 @default.
• W4311551481 hasConceptScore W4311551481C49204034 @default.
• W4311551481 hasConceptScore W4311551481C53631411 @default.
• W4311551481 hasConceptScore W4311551481C62520636 @default.
• W4311551481 hasConceptScore W4311551481C67320510 @default.
• W4311551481 hasConceptScore W4311551481C91586092 @default.
• W4311551481 hasLocation W43115514811 @default.
• W4311551481 hasOpenAccess W4311551481 @default.
• W4311551481 hasPrimaryLocation W43115514811 @default.
• W4311551481 hasRelatedWork W1517164814 @default.
• W4311551481 hasRelatedWork W2005904805 @default.
• W4311551481 hasRelatedWork W2007853122 @default.
• W4311551481 hasRelatedWork W2055072015 @default.
• W4311551481 hasRelatedWork W2154789525 @default.
• W4311551481 hasRelatedWork W2192706293 @default.
• W4311551481 hasRelatedWork W3162381732 @default.
• W4311551481 hasRelatedWork W3216341825 @default.
• W4311551481 hasRelatedWork W4292402051 @default.
• W4311551481 hasRelatedWork W4311917591 @default.
• W4311551481 isParatext "false" @default.
• W4311551481 isRetracted "false" @default.
• W4311551481 workType "peer-review" @default.