English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In two case studies we elaborateon spatial and temporal structures of the daysideaurora within 08:00-16:00 magnetic local time(MLT) and discuss the relationship of this structure tosolar wind-magnetosphere interconnection topologyand the different stages of evolution of open field lines in the Dungeyconvection cycle. The detailed 2-Dauroral morphology is obtained from continuous ground observationsat Ny \uc5lesund(76° magnetic latitude (MLAT)), Svalbard during two days when theinterplanetary magnetic field (IMF) is directed southeast(By>0; Bz<0). The auroral activityconsists of the successive activations of the following forms:(i) latitudinally separated,sunward moving, arcs/bands of dayside boundary plasma sheet (BPS) origin,in the prenoon (08:00-11:00 MLT) and postnoon (12:00-16:00 MLT)sectors, within 70-75° MLAT,(ii) poleward moving auroral forms (PMAFs) emanating fromthe pre- and postnoon brightening events,and (iii) a specific activity appearing in the07:00-10:00 MLT/75-80° MLATduring the prevailing IMF By>0conditions.The pre- and postnoon activations are separated bya region of strongly attenuated auroral activity/intensity withinthe 11:00-12:00 MLT sector, often referred to as the midday gap aurora.The latter aurora is attributed tothe presence of component reconnection at thesubsolar magnetopause where the stagnant magnetosheathflow lead to field-alignedcurrents (FACs) which are of only moderate intensity.The much more active and intense aurorae in the prenoon (07:00-11:00 MLT)and postnoon (12:00-16:00 MLT)sectors originate inmagnetopause reconnection events that areinitiated well away from the subsolar point.The high-latitude auroral activity in the prenoon sector (feature iii)is found to be accompanied by a convection channel at the polar capboundary. The associated ground magnetic deflection (DPY)is a Svalgaard-Mansurov effect.The convection channel is attributed to effectivemomentum transfer from thesolar wind-magnetosphere dynamo in the high-latitudeboundary layer (HBL), on the downstream side of the cusp

Detailed dayside auroral morphology as a function of local time for southeast IMF orientation: implications for solar wind-magnetosphere coupling