{"id":288619,"date":"2023-10-08T19:35:38","date_gmt":"2023-10-08T18:35:38","guid":{"rendered":"https:\/\/zakrasnejsivimperk.cz\/?p=288619"},"modified":"2023-10-08T19:38:40","modified_gmt":"2023-10-08T18:38:40","slug":"nebe-nad-hlavou-jak-vlastne-dochazi-k-jevu-ktery-nazyvame-babi-leto","status":"publish","type":"post","link":"https:\/\/zakrasnejsivimperk.cz\/?p=288619","title":{"rendered":"NEBE NAD HLAVOU: Jak vlastn\u011b doch\u00e1z\u00ed k jevu, kter\u00fd naz\u00fdv\u00e1me bab\u00ed l\u00e9to?"},"content":{"rendered":"

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Bab\u00ed l\u00e9to pat\u0159\u00ed ke zn\u00e1m\u00fdm pov\u011btrnostn\u00edm singularit\u00e1m. Co to je ta \u201esingularita\u201c?<\/h6>\n

\u201eSingularita je zjednodu\u0161en\u011b \u0159e\u010deno p\u0159echodn\u00e9 naru\u0161en\u00ed o\u010dek\u00e1van\u00e9ho pr\u016fb\u011bhu v\u00fdvoje teploty vzduchu b\u011bhem roku,\u201c<\/em> \u0159\u00edk\u00e1 Martin Nov\u00e1k z \u010cHM\u00da.<\/p>\n

Nejtepleji b\u00fdv\u00e1 zpravidla v \u010dervenci a pak teplota s podzimem postupn\u011b kles\u00e1 a chlad vrchol\u00ed v zimn\u00edch m\u011bs\u00edc\u00edch, zpravidla v lednu. Kdy\u017e odhl\u00e9dneme od b\u011b\u017en\u00fdch v\u00fdkyv\u016f teploty, d\u00e1 se \u0159\u00edci, \u017ee od \u00fanora se postupn\u011b otepluje a od srpna zase ochlazuje.<\/p>\n

Bab\u00ed l\u00e9to tedy pat\u0159\u00ed mezi tyto odchylky od plynul\u00e9ho teplotn\u00edho v\u00fdvoje (n\u011bkdy se ani nemus\u00ed vylo\u017een\u011b oteplit \u2013 ale t\u0159eba se na p\u00e1r dn\u00ed prost\u011b jen zastavuje teplotn\u00ed \u201ese\u0161up\u201c).<\/p>\n

Jak vlastn\u011b doch\u00e1z\u00ed k jevu, kter\u00fd naz\u00fdv\u00e1me bab\u00ed l\u00e9to?<\/h6>\n

\u201eP\u0159\u00ed\u010dinou bab\u00edho l\u00e9ta je rozs\u00e1hl\u00e1 tlakov\u00e1 v\u00fd\u0161e, kter\u00e1 se koncem l\u00e9ta a za\u010d\u00e1tkem podzimu vytvo\u0159\u00ed nad jihov\u00fdchodn\u00ed Evropou,\u201c<\/em> vysv\u011btluje meteorolog. \u201eV t\u011bchto oblastech je toti\u017e men\u0161\u00ed vliv oce\u00e1nu, kter\u00fd jinak vyrovn\u00e1v\u00e1 teplotn\u00ed zm\u011bny. Kontinent\u00e1ln\u00ed klima tam v z\u00e1\u0159\u00ed zp\u016fsobuje rychlej\u0161\u00ed ochlazov\u00e1n\u00ed ne\u017e u n\u00e1s. V\u00fdsledkem tlakov\u00e9 v\u00fd\u0161e b\u00fdv\u00e1 tepl\u00e9 proud\u011bn\u00ed z t\u011bchto oblast\u00ed do st\u0159edu Evropy.\u201c<\/em> Bab\u00ed l\u00e9to doprov\u00e1z\u00ed \u010dasto i slune\u010dn\u00e9 po\u010das\u00ed nebo \u010dast\u011bj\u0161\u00ed rann\u00ed mlhy.<\/p>\n

Mo\u017en\u00e1 v\u00e1s napad\u00e1 ot\u00e1zka, jestli se singularity jako bab\u00ed l\u00e9to objevuj\u00ed ka\u017edoro\u010dn\u011b ve stejnou dobu. Neb\u00fdv\u00e1 tomu tak. Vyskytuj\u00ed se i roky, kdy singularity nep\u0159ijdou v\u016fbec. A tak\u00e9 l\u00e9ta, v nich\u017e jsou siln\u011bj\u0161\u00ed \u010di del\u0161\u00ed. N\u011bkte\u0159\u00ed z n\u00e1s si mohou vzpomenout na bab\u00ed l\u00e9to v r. 1959, kter\u00e9 se prot\u00e1hlo na cca 7 t\u00fddn\u016f. A taky v n\u011bkter\u00fdch letech bab\u00ed l\u00e9to nenastalo v\u016fbec.<\/p>\n

Ov\u0161em nejpravd\u011bpodobn\u011bj\u0161\u00ed doba v\u00fdskytu bab\u00edho l\u00e9ta b\u00fdv\u00e1 dle statistik od 21. z\u00e1\u0159\u00ed do 2. \u0159\u00edjna. Z toho d\u016fvodu se m\u016f\u017eeme n\u011bkdy setkat i s ozna\u010den\u00edm \u201ev\u00e1clavsk\u00e9 l\u00e9to\u201c.<\/p>\n

Kdy\u017e u\u017e jsme u t\u011bch jmen\u2026 N\u011bkdy bab\u00ed l\u00e9to p\u0159eru\u0161\u00ed tzv. franti\u0161sk\u00e9 ochlazen\u00ed (Franti\u0161ek m\u00e1 sv\u00e1tek 4. \u0159\u00edjna). Pak se pro tato 2 odd\u011blen\u00e1 obdob\u00ed pou\u017e\u00edv\u00e1 ozna\u010den\u00ed \u201esvatov\u00e1clavsk\u00e9 l\u00e9to\u201c a \u201eterezi\u00e1nsk\u00e9 l\u00e9to\u201c (Tereza m\u00e1 sv\u00e1tek 15. \u0159\u00edjna).<\/p>\n

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FB –\u00a0\u010cesk\u00fd hydrometeorologick\u00fd \u00fastav<\/strong><\/a><\/span><\/p>\n

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