{"id":3877,"date":"2025-03-28T13:13:47","date_gmt":"2025-03-28T10:13:47","guid":{"rendered":"https:\/\/www.acccflagship.fi\/?p=3877"},"modified":"2025-03-28T13:13:54","modified_gmt":"2025-03-28T10:13:54","slug":"lumiolojen-muutokset-talla-vuosisadalla","status":"publish","type":"post","link":"https:\/\/www.acccflagship.fi\/index.php\/2025\/03\/28\/lumiolojen-muutokset-talla-vuosisadalla\/","title":{"rendered":"Lumiolojen muutokset t\u00e4ll\u00e4 vuosisadalla"},"content":{"rendered":"\n

Tutkimuksessa tarkasteltiin lumiolojen muutosta t\u00e4ll\u00e4 vuosisadalla Suomessa ja muualla Pohjois-Euroopassa uusimman sukupolven (CMIP6) ilmastomallien perusteella. Ty\u00f6n keskeiset tulokset olivat Suomen osalta seuraavat: 1) Ilmaston l\u00e4mmetess\u00e4 talven suurin lumim\u00e4\u00e4r\u00e4 (lumen vesiarvo) pienenee. 2) Yhten\u00e4isen lumipeitteisen kauden kesto lyhenee, samalla kun sen alku siirtyy my\u00f6hemm\u00e4ksi ja loppu aikaisemmaksi. 3) N\u00e4m\u00e4 muutokset ovat suurempia Etel\u00e4-Suomessa kuin Pohjois-Suomessa. 4) Lumen m\u00e4\u00e4r\u00e4 v\u00e4henee ja lumipeitteinen kausi lyhenee sit\u00e4 enemm\u00e4n, mit\u00e4 suurempia ovat kasvihuonekaasujen p\u00e4\u00e4st\u00f6t. 5) Tulevaisuuden lumiolojen muutoksiin liittyy huomattavaa ep\u00e4varmuutta. P\u00e4\u00e4st\u00f6jen kehityksen ep\u00e4varmuuden ohella t\u00e4h\u00e4n vaikuttavat sek\u00e4 ilmastomallien erot ett\u00e4 ilmaston luonnollinen vaihtelu.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Talven suurimman lumim\u00e4\u00e4r\u00e4n suhteellinen muutos (%) ja pisimm\u00e4n lumen peitt\u00e4m\u00e4n jakson pituuden muutos (p\u00e4iv\u00e4\u00e4) jaksoon 1991\u20132020 verrattuna (20 vuoden liukuvat keskiarvot). (a) Lumim\u00e4\u00e4r\u00e4n muutos Etel\u00e4-Suomessa (60,5\u201362 \u00b0N, 23\u201327 \u00b0E) ja (b) Lapissa (67\u201369 \u00b0N, 24\u201328 \u00b0E). (c) Lumen peitt\u00e4m\u00e4n jakson pituuden muutos Etel\u00e4-Suomessa ja (d) Lapissa. K\u00e4yr\u00e4t esitt\u00e4v\u00e4t parasta arviota eri p\u00e4\u00e4st\u00f6skenaarioille ja harmaa varjostus 5\u201395 % ep\u00e4varmuushaarukkaa SSP245-skenaariolle. Ep\u00e4varmuuteen vaikuttavat sek\u00e4 ilmastomallien erot ett\u00e4 ilmaston luonnollinen vaihtelu.<\/p>\n\n\n\n

LINKKI ILMATIETEEN LAITOKSEN UUTISEEN: https:\/\/www.ilmatieteenlaitos.fi\/artikkeli\/4X7BY3vg13LKAYfmnmCLG8<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Tutkimuksessa tarkasteltiin lumiolojen muutosta t\u00e4ll\u00e4 vuosisadalla Suomessa ja muualla Pohjois-Euroopassa uusimman sukupolven (CMIP6) ilmastomallien perusteella. Ty\u00f6n keskeiset tulokset olivat Suomen osalta seuraavat: 1) Ilmaston l\u00e4mmetess\u00e4 talven suurin lumim\u00e4\u00e4r\u00e4 (lumen vesiarvo) pienenee. 2) Yhten\u00e4isen lumipeitteisen kauden kesto lyhenee, samalla kun sen alku siirtyy my\u00f6hemm\u00e4ksi ja loppu aikaisemmaksi. 3) N\u00e4m\u00e4 muutokset ovat suurempia Etel\u00e4-Suomessa kuin Pohjois-Suomessa. 4) […]<\/p>\n","protected":false},"author":1,"featured_media":2541,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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