{"id":"https://openalex.org/W7221754850","doi":"https://doi.org/10.48550/arxiv.2610.16314","title":"Grand minima and intermittency in near-critical convection-driven dynamos","display_name":"Grand minima and intermittency in near-critical convection-driven dynamos","publication_year":2026,"publication_date":"2026-10-12","ids":{"openalex":"https://openalex.org/W7221754850","doi":"https://doi.org/10.48550/arxiv.2610.16314"},"language":"en","primary_location":{"id":"pmh:oai:arXiv.org:2610.16314","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2610.16314","pdf_url":"https://arxiv.org/pdf/2610.16314","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"volume":null,"type":"preprint","is_traditional":true,"indexed_in":["arxiv","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2610.16314","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5158742775","display_name":"P. J. K\u00e4pyl\u00e4","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I15766117","display_name":"University of Graz","ror":"https://ror.org/01faaaf77","country_code":"AT","type":"education","lineage":["https://openalex.org/I15766117"]}],"countries":["AT"],"is_corresponding":true,"raw_author_name":"K\u00e4pyl\u00e4, P. J.","raw_affiliation_strings":["University of Graz,KIS"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Graz,KIS","institution_ids":["https://openalex.org/I15766117"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5158742775"],"corresponding_institution_ids":["https://openalex.org/I15766117"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10251","display_name":"Solar and Space Plasma Dynamics","score":0.9951000213623047,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10251","display_name":"Solar and Space Plasma Dynamics","score":0.9951000213623047,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11786","display_name":"Geomagnetism and Paleomagnetism Studies","score":0.0020000000949949026,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10039","display_name":"Stellar, planetary, and galactic studies","score":0.0010999999940395355,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/solar-dynamo","display_name":"solar dynamo","score":0.7960000038146973},{"id":"https://openalex.org/keywords/grand-minima","display_name":"grand minima","score":0.9660000205039978},{"id":"https://openalex.org/keywords/differential-rotation","display_name":"differential rotation","score":0.7870000004768372},{"id":"https://openalex.org/keywords/magnetic-diffusivity","display_name":"magnetic diffusivity","score":0.8339999914169312},{"id":"https://openalex.org/keywords/solar-cycle","display_name":"solar cycle","score":0.3540000021457672}],"concepts":[{"id":"https://openalex.org/C135757623","wikidata":"https://www.wikidata.org/wiki/Q719861","display_name":"Dynamo","level":3,"score":0.9688000082969666},{"id":"https://openalex.org/C155008239","wikidata":"https://www.wikidata.org/wiki/Q59122","display_name":"Differential rotation","level":3,"score":0.8136000037193298},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.7623999714851379},{"id":"https://openalex.org/C115260700","wikidata":"https://www.wikidata.org/wiki/Q11408","display_name":"Magnetic field","level":2,"score":0.6327999830245972},{"id":"https://openalex.org/C176879286","wikidata":"https://www.wikidata.org/wiki/Q2377388","display_name":"Solar dynamo","level":5,"score":0.5957000255584717},{"id":"https://openalex.org/C105094362","wikidata":"https://www.wikidata.org/wiki/Q1269129","display_name":"Dynamo theory","level":4,"score":0.5530999898910522},{"id":"https://openalex.org/C186633575","wikidata":"https://www.wikidata.org/wiki/Q845060","display_name":"Maxima and minima","level":2,"score":0.5055999755859375},{"id":"https://openalex.org/C2780388094","wikidata":"https://www.wikidata.org/wiki/Q1666248","display_name":"Intermittency","level":3,"score":0.4862000048160553},{"id":"https://openalex.org/C31532427","wikidata":"https://www.wikidata.org/wiki/Q2549249","display_name":"Magnetohydrodynamics","level":3,"score":0.4198000133037567},{"id":"https://openalex.org/C74050887","wikidata":"https://www.wikidata.org/wiki/Q848368","display_name":"Rotation (mathematics)","level":2,"score":0.3982999920845032},{"id":"https://openalex.org/C42471609","wikidata":"https://www.wikidata.org/wiki/Q1779048","display_name":"Magnetohydrodynamic drive","level":4,"score":0.3885999917984009},{"id":"https://openalex.org/C162565982","wikidata":"https://www.wikidata.org/wiki/Q3725254","display_name":"Magnetic energy","level":4,"score":0.35679998993873596},{"id":"https://openalex.org/C121864883","wikidata":"https://www.wikidata.org/wiki/Q677916","display_name":"Statistical physics","level":1,"score":0.34599998593330383},{"id":"https://openalex.org/C74650414","wikidata":"https://www.wikidata.org/wiki/Q11397","display_name":"Classical mechanics","level":1,"score":0.3034999966621399},{"id":"https://openalex.org/C148043351","wikidata":"https://www.wikidata.org/wiki/Q4456944","display_name":"Current (fluid)","level":2,"score":0.29789999127388},{"id":"https://openalex.org/C199635899","wikidata":"https://www.wikidata.org/wiki/Q6500960","display_name":"Earth's magnetic field","level":3,"score":0.29159998893737793},{"id":"https://openalex.org/C38349280","wikidata":"https://www.wikidata.org/wiki/Q1434290","display_name":"Flow (mathematics)","level":2,"score":0.2897000014781952},{"id":"https://openalex.org/C197162081","wikidata":"https://www.wikidata.org/wiki/Q3294789","display_name":"Magnetism","level":2,"score":0.2896000146865845},{"id":"https://openalex.org/C57879066","wikidata":"https://www.wikidata.org/wiki/Q41217","display_name":"Mechanics","level":1,"score":0.2863999903202057},{"id":"https://openalex.org/C93226319","wikidata":"https://www.wikidata.org/wiki/Q193137","display_name":"Differential (mechanical device)","level":2,"score":0.28610000014305115},{"id":"https://openalex.org/C152406496","wikidata":"https://www.wikidata.org/wiki/Q1059740","display_name":"Geomagnetic reversal","level":3,"score":0.27549999952316284},{"id":"https://openalex.org/C207821765","wikidata":"https://www.wikidata.org/wiki/Q405372","display_name":"Instability","level":2,"score":0.27079999446868896},{"id":"https://openalex.org/C30475298","wikidata":"https://www.wikidata.org/wiki/Q909554","display_name":"Computational physics","level":1,"score":0.26820001006126404},{"id":"https://openalex.org/C9652623","wikidata":"https://www.wikidata.org/wiki/Q190109","display_name":"Field (mathematics)","level":2,"score":0.26159998774528503},{"id":"https://openalex.org/C12980444","wikidata":"https://www.wikidata.org/wiki/Q23538","display_name":"Equator","level":3,"score":0.25200000405311584}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arXiv.org:2610.16314","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2610.16314","pdf_url":"https://arxiv.org/pdf/2610.16314","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"doi:10.48550/arxiv.2610.16314","doi":"https://doi.org/10.48550/arxiv.2610.16314","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2610.16314","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2610.16314","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2610.16314","pdf_url":"https://arxiv.org/pdf/2610.16314","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320331625","display_name":"Gauss Centre for Supercomputing","ror":"https://ror.org/0585fsj26"},{"id":"https://openalex.org/F4320334763","display_name":"Leibniz-Gemeinschaft","ror":"https://ror.org/01n6r0e97"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7221754850.pdf","grobid_xml":"https://content.openalex.org/works/W7221754850.grobid-xml"},"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W4407535762","https://openalex.org/W4310825277","https://openalex.org/W1455809057","https://openalex.org/W6940842953","https://openalex.org/W3005605304","https://openalex.org/W3137584807","https://openalex.org/W7170093406","https://openalex.org/W4367313055","https://openalex.org/W2116298010","https://openalex.org/W2765130413"],"abstract_inverted_index":{"Context:":[0],"Solar":[1],"magnetism":[2],"exhibits":[3],"long-term":[4,72],"variations":[5,116],"on":[6,31,232],"timescales":[7,32],"of":[8,22,28,56,74,81,91,99,117,176,204,228],"decades":[9],"to":[10,17,34,49,88,185,188],"centuries.":[11],"Aims:":[12],"The":[13,54,67,102,174,193],"main":[14,68],"aim":[15],"is":[16,59,70,127,144,212,235,241],"study":[18],"how":[19],"the":[20,23,26,35,57,63,75,82,89,109,114,122,131,135,138,141,163,180,202,221,226,229,238],"supercriticality":[21,55,80,140],"dynamo":[24,58,76,83,92,210],"affects":[25],"variability":[27,73],"magnetic":[29,64,118,132,142,164,230],"fields":[30,165],"relevant":[33],"Sun.":[36],"Methods:":[37],"Three-dimensional":[38],"rotating":[39],"magnetohydrodynamic":[40],"simulations":[41,103,211],"in":[42,105,179,207],"a":[43,189],"spherical":[44],"wedge":[45],"geometry":[46],"are":[47],"used":[48],"produce":[50],"self-consistent":[51],"convection-driven":[52],"dynamos.":[53],"controlled":[60],"by":[61,130],"varying":[62],"diffusivity.":[65],"Results:":[66],"result":[69],"that":[71,85,201,225],"increases":[77],"with":[78,137],"decreasing":[79],"and":[84,120,147,166,199],"cases":[86,112,136],"nearest":[87],"onset":[90],"action":[93],"show":[94,113],"extended":[95],"grand":[96,177,205],"minima-like":[97],"periods":[98],"low":[100],"activity.":[101],"fall":[104],"three":[106],"classes":[107],"where":[108,121],"least":[110],"supercritical":[111,191],"largest":[115],"activity":[119],"flow":[123],"including":[124],"differential":[125,148,167,233],"rotation":[126,149,168,234],"almost":[128],"unaffected":[129],"field.":[133],"In":[134,158],"highest":[139],"field":[143,231],"permanently":[145,150],"strong":[146,170],"quenched,":[151],"both":[152,162],"having":[153],"relatively":[154],"little":[155],"temporal":[156],"variation.":[157],"an":[159],"intermediate":[160],"regime":[161],"exhibit":[169],"anticorrelated":[171],"fluctuations.":[172],"Conclusions:":[173],"occurrence":[175],"minima":[178,206],"Sun":[181],"has":[182],"been":[183],"conjectured":[184],"be":[186],"due":[187],"weakly":[190],"dynamo.":[192],"current":[194,222],"results":[195,223],"support":[196],"this":[197],"idea":[198],"suggest":[200,224],"absence":[203],"earlier":[208],"global":[209],"because":[213],"their":[214],"large-scale":[215],"dynamos":[216],"were":[217],"too":[218],"supercritical.":[219],"Furthermore,":[220],"effect":[227],"negligible":[236],"if":[237],"average":[239],"rms-field":[240],"less":[242],"than":[243],"about":[244],"2~kG.":[245]},"counts_by_year":[],"updated_date":"2026-10-28T10:33:24.094632","created_date":"2026-10-15T00:00:00"}