{"id":141634,"date":"2026-09-09T13:37:11","date_gmt":"2026-09-09T10:37:11","guid":{"rendered":"https:\/\/www.santaka.info\/?p=141634"},"modified":"2026-09-09T13:37:11","modified_gmt":"2026-09-09T10:37:11","slug":"kodel-ugnikalnio-pelenai-sustabdo-lektuvus","status":"publish","type":"post","link":"https:\/\/www.santaka.info\/index.php\/2026\/09\/09\/kodel-ugnikalnio-pelenai-sustabdo-lektuvus\/","title":{"rendered":"Kod\u0117l ugnikalnio pelenai sustabdo l\u0117ktuvus?"},"content":{"rendered":"

Savaitgal\u012f Indonezijoje i\u0161siver\u017eus Anak Krakatau ugnikalniui, d\u0117l ore pasklidusi\u0173 pelen\u0173 sutriko D\u017eakartos ir kit\u0173 oro uost\u0173 darbas. Lietuvos geologijos tarnybos (LGT) specialistai atkreipia d\u0117mes\u012f, kad ugnikalni\u0173 poveikis gali b\u016bti juntamas ne tik j\u0173 pap\u0117d\u0117je \u2013 v\u0117jo ne\u0161ami pelenai gali sutrikdyti skryd\u017eius u\u017e \u0161imt\u0173 ar net t\u016bkstan\u010di\u0173 kilometr\u0173.<\/strong><\/p>

Vulkaniniai pelenai n\u0117ra tokie, kaip \u017eidinyje liekantys mink\u0161ti pelenai. Tai puri piroklastin\u0117<\/em>med\u017eiaga, susidedanti i\u0161 lavos ir kit\u0173 uolien\u0173, mineral\u0173 smulki\u0173 daleli\u0173 (< 2 mm skersmens), kurios, i\u0161siver\u017eus ugnikalniui, i\u0161metamos \u012f atmosfer\u0105.<\/p>

I\u0161siver\u017eimo metu jos gali b\u016bti i\u0161metamos \u012f keliolikos kilometr\u0173 auk\u0161t\u012f, kur skraido keleiviniai l\u0117ktuvai, be to, v\u0117jas jas nune\u0161a labai toli nuo ugnikalnio. Kai kurie ugnikalniai vulkanini\u0173 pelen\u0173 i\u0161meta labai daug, pvz., Krakatau ugnikalniui sprogus 1883 m., vulkaniniai pelenai beveik du kartus apskriejo \u017dem\u0119.<\/p>

Patekusios \u012f reaktyvin\u012f varikl\u012f, \u0161ios dalel\u0117s gali i\u0161silydyti, o v\u0117sesn\u0117se jo dalyse \u2013 v\u0117l sukiet\u0117ti ir prilipti prie pavir\u0161i\u0173. D\u0117l to sutrinka oro srautas, variklis gali prarasti gali\u0105 ar net visai u\u017egesti. Vulkaniniai pelenai taip pat brai\u017eo pilot\u0173 kabinos langus, pa\u017eeid\u017eia l\u0117ktuvo pavir\u0161i\u0173, jutiklius ir kitas sistemas.<\/p>

Pelen\u0173 debes\u012f ne visada lengva pasteb\u0117ti, ypa\u010d nakt\u012f arba kai debesuota. Tod\u0117l jo jud\u0117jimas stebimas palydovais ir kitomis priemon\u0117mis, o apie pavojingas zonas informuojami pilotai ir skryd\u017ei\u0173 valdymo tarnybos. Aptikus vulkanini\u0173 pelen\u0173 oro erdv\u0117je, skryd\u017ei\u0173 mar\u0161rutai kei\u010diami, o prireikus oro uost\u0173 veikla laikinai stabdoma.<\/p>

Vis d\u0117lto ugnikalniai ne tik griauna. Kai magma i\u0161 \u017eem\u0117s gelmi\u0173 i\u0161silieja \u012f pavir\u0161i\u0173 lavos pavidalu, i\u0161 jos susidaro vulkanin\u0117s uolienos, j\u0173 dangos ar net vulkanin\u0117s salos. Tokios uolienos vadinamos efuzin\u0117mis arba i\u0161siliejusiomis. Vulkaniniams pelenams ir uolienoms ilgainiui d\u016blant, ima formuotis derlingi dirvo\u017eemiai. Su vulkaniniais procesais taip pat susij\u0119 geotermin\u0117s energijos \u0161altiniai ir dalies nauding\u0173j\u0173 i\u0161kasen\u0173 telkini\u0173 susidarymas.<\/p>

Kok\u012f didel\u012f poveik\u012f gali padaryti ugnikalnis, primena ir nesenas faktas. Tarkim, 2021 m. La Palmos saloje i\u0161siliejusi lava, pasiekusi Atlanto vandenyn\u0105, i\u0161pl\u0117t\u0117 salos krant\u0105. Taigi tas pats ugnikalnis gali sustabdyti skryd\u017eius u\u017e t\u016bkstan\u010di\u0173 kilometr\u0173, o savo pap\u0117d\u0117je \u2013 vos per kelias valandas neatpa\u017e\u012fstamai pakeisti kra\u0161tovaizd\u012f.<\/p>","protected":false},"excerpt":{"rendered":"

Savaitgal\u012f Indonezijoje i\u0161siver\u017eus Anak Krakatau ugnikalniui, d\u0117l ore pasklidusi\u0173 pelen\u0173 sutriko D\u017eakartos ir kit\u0173 oro uost\u0173 darbas. Lietuvos geologijos tarnybos (LGT) specialistai atkreipia d\u0117mes\u012f, kad ugnikalni\u0173 poveikis gali b\u016bti juntamas… <\/p>\n","protected":false},"author":13,"featured_media":141635,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"pmpro_default_level":"","jetpack_post_was_ever_published":false,"_FSMCFIC_featured_image_caption":"","_FSMCFIC_featured_image_nocaption":"","_FSMCFIC_featured_image_hide":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[31],"tags":[],"class_list":["post-141634","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uzsienyje","pmpro-has-access"],"featured_image_urls":{"full":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-scaled.jpg",2560,1707,false],"thumbnail":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-150x150.jpg",150,150,true],"medium":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-300x200.jpg",300,200,true],"medium_large":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-768x512.jpg",768,512,true],"large":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-1024x683.jpg",1024,683,true],"1536x1536":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-1536x1024.jpg",1536,1024,true],"2048x2048":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-2048x1365.jpg",2048,1365,true],"post-thumbnail":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-600x400.jpg",600,400,true],"visualnews_post_thumb":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-600x400.jpg",600,400,true],"woocommerce_thumbnail":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-300x300.jpg",300,300,true],"woocommerce_single":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-600x400.jpg",600,400,true],"woocommerce_gallery_thumbnail":["https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-100x100.jpg",100,100,true]},"author_info":{"info":["Gidas"]},"category_info":"U\u017esienyje<\/a>","tag_info":"U\u017esienyje","comment_count":"0","jetpack_featured_media_url":"https:\/\/www.santaka.info\/wp-content\/uploads\/2026\/09\/wm1e1TReCl4-scaled.jpg","jetpack_sharing_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/posts\/141634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/comments?post=141634"}],"version-history":[{"count":1,"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/posts\/141634\/revisions"}],"predecessor-version":[{"id":141636,"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/posts\/141634\/revisions\/141636"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/media\/141635"}],"wp:attachment":[{"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/media?parent=141634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/categories?post=141634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.santaka.info\/index.php\/wp-json\/wp\/v2\/tags?post=141634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}