Variations in plume activity reveal the dynamics of water-filled faults on Enceladus

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10486376" target="_blank" >RIV/00216208:11320/24:10486376 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/24:10486376

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=17epW8n5Ih" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=17epW8n5Ih</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41467-024-51677-z" target="_blank" >10.1038/s41467-024-51677-z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Variations in plume activity reveal the dynamics of water-filled faults on Enceladus

Popis výsledku v původním jazyce

After discovering a jet activity near the south pole of Saturn&apos;s moon Enceladus, the Cassini mission demonstrated the existence of a subsurface water ocean with a unique sampling opportunity through flybys. Diurnal variations in the observed brightness of the plume suggest a tidal control, although the existence and timing of two activity maxima seem to contradict stress analysis predictions. Here, we re-interpret the observed plume variability by combining a 3D global model of tidal deformation of the fractured ice shell with a 1D local model of transport processes within south-polar faults. Our model successfully predicts the observed plume&apos;s temporal variability by combining two independent vapour transport mechanisms: slip-controlled jet flow and normal-stress-controlled ambient flow. Moreover, it provides a possible explanation for the differences between the vapour and solid emission rates during the diurnal cycle and the observed fractionation of the various icy particle families. Our model prediction could be tested by future JWST observations targeted when Enceladus is at different positions on its orbit and could be used to determine the optimal strategy for plume material sampling by future space missions.Cassini mission revealed water-rich plumes, with temporal variation, near the south pole of Saturn&apos;s moon Enceladus. Here, the authors show combination of slip-controlled jet flow and normal-stress-controlled ambient flow can explain the temporal variability of Enceladus&apos; plumes.

Název v anglickém jazyce

Variations in plume activity reveal the dynamics of water-filled faults on Enceladus

Popis výsledku anglicky

After discovering a jet activity near the south pole of Saturn&apos;s moon Enceladus, the Cassini mission demonstrated the existence of a subsurface water ocean with a unique sampling opportunity through flybys. Diurnal variations in the observed brightness of the plume suggest a tidal control, although the existence and timing of two activity maxima seem to contradict stress analysis predictions. Here, we re-interpret the observed plume variability by combining a 3D global model of tidal deformation of the fractured ice shell with a 1D local model of transport processes within south-polar faults. Our model successfully predicts the observed plume&apos;s temporal variability by combining two independent vapour transport mechanisms: slip-controlled jet flow and normal-stress-controlled ambient flow. Moreover, it provides a possible explanation for the differences between the vapour and solid emission rates during the diurnal cycle and the observed fractionation of the various icy particle families. Our model prediction could be tested by future JWST observations targeted when Enceladus is at different positions on its orbit and could be used to determine the optimal strategy for plume material sampling by future space missions.Cassini mission revealed water-rich plumes, with temporal variation, near the south pole of Saturn&apos;s moon Enceladus. Here, the authors show combination of slip-controlled jet flow and normal-stress-controlled ambient flow can explain the temporal variability of Enceladus&apos; plumes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10102 - Applied mathematics

Projekt

<a href="/cs/project/GA22-20388S" target="_blank" >GA22-20388S: Vývoj vnějších slupek ledových měsíců z pohledu numerického modelování</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nature Communications

ISSN

2041-1723

e-ISSN

2041-1723

Svazek periodika

15

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

7405

Kód UT WoS článku

001299163800002

EID výsledku v databázi Scopus

2-s2.0-85202341695