{"id":6947,"date":"2012-02-23T10:44:32","date_gmt":"2012-02-23T09:44:32","guid":{"rendered":"http:\/\/www.slometeo.net\/zaplana\/blog\/?p=6947"},"modified":"2012-02-23T17:27:16","modified_gmt":"2012-02-23T16:27:16","slug":"primerjava-dveh-najhladnejsih-mrazisc-zaplane-februarja-2012","status":"publish","type":"post","link":"http:\/\/www.slometeo.net\/zaplana\/blog\/?p=6947","title":{"rendered":"Primerjava dveh najhladnej\u00c5\u00a1ih mrazi\u00c5\u00a1\u00c4\u008d Zaplane februarja 2012"},"content":{"rendered":"

Novej\u00c5\u00a1e primerjave ka\u00c5\u00beejo, da\u00c2\u00a0so termometri\u00c2\u00a0Madgetech, eden takih je v uporabi tudi v mrazi\u00c5\u00a1\u00c4\u008du\u00c2\u00a0Dolinca, glede na preostale razpolo\u00c5\u00beljive\u00c2\u00a0termometre dobro umerjeni pri vi\u00c5\u00a1ji temperaturi. V\u00c2\u00a0temperaturnem obmo\u00c4\u008dju med 0 \u00c2\u00b0C in -10 \u00c2\u00b0C pa se pri omenjenem termometru pojavi pribitek k\u00c2\u00a0temperaturi za 1 \u00c2\u00b0C. Odstopanje je bilo ugotovljeno pri vseh dosedanjih termometrih\u00c2\u00a0te vrste\u00c2\u00a0in tako termometer pri temperaturi -10 \u00c2\u00b0C ali ni\u00c5\u00beji ka\u00c5\u00bee za stopinjo vi\u00c5\u00a1jo temperaturo od preostalih merilcev. Prilo\u00c5\u00beena programska oprema omogo\u00c4\u008da enostavno umerjanje termometra\u00c2\u00a0na podlagi dveh to\u00c4\u008dk\u00c2\u00a0na\u00c2\u00a0temperaturni skali in s tem u\u00c4\u008dinkovito odpravo te\u00c5\u00beave. Umerjanje\u00c2\u00a0termometrov je dolgotrajno in bo v celoti opravljeno \u00c5\u00a1ele po leto\u00c5\u00a1nji zimski sezoni. Vsekakor pa je zanimivo omeniti primer doslej najni\u00c5\u00beje temperature, ki je bila v mrazi\u00c5\u00a1\u00c4\u008du Dolinca izmerjena\u00c2\u00a020. decembra 2009. Po tovarni\u00c5\u00a1kem umerjanju je termometer\u00c2\u00a0izmeril temperaturo -30,5 \u00c2\u00b0C, s kasnej\u00c5\u00a1imi primerjavami pa se je pokazalo, da je bila omenjena vrednost zagotovo previsoka. Zaradi primerjav pri vi\u00c5\u00a1ji temperaturi je bila nova vrednost le malo korigirana in ocenjena na -30,8 \u00c2\u00b0C, po novej\u00c5\u00a1ih primerjavah pri precej\u00c2\u00a0ni\u00c5\u00beji temperaturi pa\u00c2\u00a0se je moralo 20. decembra 2009 v mrazi\u00c5\u00a1\u00c4\u008du Dolinca ohladiti celo na -31,5 \u00c2\u00b0C.<\/p>\n

\"\"<\/a>Primer umerjanja enega izmed Madgetechovih termometrov na samodejno vremensko postajo Zaplana (WMR). Umerjanje termometrov na samodejno postajo opravi\u00c4\u008dujejo tudi klasi\u00c4\u008dni teko\u00c4\u008dinski termometri.<\/em><\/p>\n

V mrazi\u00c5\u00a1\u00c4\u008du Dolinca so se prve meritve temperature vr\u00c5\u00a1ile leta 2002, avtomatizirale pa so se spomladi leta 2004. Hkrati na spletnih straneh Podnebje Zaplane \u00c5\u00bee nekaj let omenjam tudi bli\u00c5\u00benje mrazi\u00c5\u00a1\u00c4\u008de Dvoj\u00c4\u008dek, ki bi bilo lahko po absolutnih temperaturnih minimumih \u00c5\u00a1e hladnej\u00c5\u00a1e od Dolince. Ugodne vremenske razmere v februarju so skupaj z omenjenim umerjanjem termometrov omogo\u00c4\u008dile natan\u00c4\u008dnej\u00c5\u00a1o primerjavo obeh mrazi\u00c5\u00a1\u00c4\u008d.<\/p>\n

Ugotovljeno je bilo, da se mrazi\u00c5\u00a1\u00c4\u008de Dvoj\u00c4\u008dek po nizkih poletnih temperaturah ne more kosati z mrazi\u00c5\u00a1\u00c4\u008dem Dolinca. Vzrok za to nista oblika in globina mrazi\u00c5\u00a1\u00c4\u008da, temve\u00c4\u008d \u00c4\u008dlove\u00c5\u00a1ki faktor. Mrazi\u00c5\u00a1\u00c4\u008de je namre\u00c4\u008d redno ko\u00c5\u00a1eno (zaradi katerega mrazi\u00c5\u00a1\u00c4\u008de kot tako sploh obstaja in ni pora\u00c5\u00a1\u00c4\u008deno z gozdom) in skoraj gola tla se\u00c2\u00a0v mrazi\u00c5\u00a1\u00c4\u008du Dvoj\u00c4\u008dek bolj ogrejejo od gosto zatravljenih\u00c2\u00a0tal v mrazi\u00c5\u00a1\u00c4\u008du Dolinca, ki je bilo zadnji\u00c4\u008d poko\u00c5\u00a1eno leta 2003. Nad toplej\u00c5\u00a1imi tlemi se pono\u00c4\u008di ozra\u00c4\u008dje manj ohladi kot nad hladnej\u00c5\u00a1imi, razlika v temperaturi tal\u00c2\u00a0med obema mrazi\u00c5\u00a1\u00c4\u008dema pa se izni\u00c4\u008di ob prisotnosti\u00c2\u00a0sne\u00c5\u00bene odeje, kar se je zgodilo v leto\u00c5\u00a1njem februarju.<\/p>\n

\"\"<\/a>Zasne\u00c5\u00beeno mrazi\u00c5\u00a1\u00c4\u008de Dvoj\u00c4\u008dek z za\u00c4\u008dasnim merilnim mestom\u00c2\u00a014. februarja.<\/em><\/p>\n

14. februarja pono\u00c4\u008di se je temperatura v mrazi\u00c5\u00a1\u00c4\u008du Dolinca spustila na -23,9 \u00c2\u00b0C. \u00c4\u0152e upo\u00c5\u00a1tevamo \u00c5\u00a1e\u00c2\u00a0odstopanje termometra pri nizkih temperaturah je bila realna vrednost -24,9 \u00c2\u00b0C, vendar se je v mrazi\u00c5\u00a1\u00c4\u008du Dvoj\u00c4\u008dek na podlagi enakega\u00c2\u00a0in\u00c2\u00a0\u00c5\u00bee umerjenega termometra ohladilo celo na -26,1 \u00c2\u00b0C. To vrednost potrjuje tudi klasi\u00c4\u008dni alkoholni termometer, ki se je omenjene no\u00c4\u008di ustavil pri -26,0 \u00c2\u00b0C. Sicer je bilo mrazi\u00c5\u00a1\u00c4\u008de Dvoj\u00c4\u008dek tekom no\u00c4\u008di, ob upo\u00c5\u00a1tevanju vseh omenjenih odstopanj med termometri,\u00c2\u00a0tudi za 2 \u00c2\u00b0C hladnej\u00c5\u00a1e od Dolince. Do podobnih ugotovitev so pripeljale \u00c5\u00a1e meritve temperature v obeh mrazi\u00c5\u00a1\u00c4\u008dih v no\u00c4\u008di na 22. februar. Domneva, da je lahko\u00c2\u00a0mrazi\u00c5\u00a1\u00c4\u008de Dvoj\u00c4\u008dek\u00c2\u00a0hladnej\u00c5\u00a1e od Dolince sicer ni nova, saj so jo potrjevale terenske, a \u00c5\u00beal nesistemati\u00c4\u008dne\u00c2\u00a0meritve temperature 18. decembra 2010, ko je bilo v Dvoj\u00c4\u008dku ob 21. uri zve\u00c4\u008der izmerjeno okoli -25 \u00c2\u00b0C, v Dolinci pa upo\u00c5\u00a1tevajo\u00c4\u008d odstopanje termometra -21,4 \u00c2\u00b0C.<\/p>\n

Mrazi\u00c5\u00a1\u00c4\u008de Dvoj\u00c4\u008dek je plitvej\u00c5\u00a1e (globina glede na najni\u00c5\u00beji obod kotanje zna\u00c5\u00a1a 9 m) in s tem \u00c5\u00a1e bolj ekstremno mrazi\u00c5\u00a1\u00c4\u008de od Dolince (12 m), saj je temperaturna inverzija izrazitej\u00c5\u00a1a. V no\u00c4\u008di na 22. februar je pri\u00c5\u00a1lo\u00c2\u00a0med meteorolo\u00c5\u00a1ko postajo Zaplana in mrazi\u00c5\u00a1\u00c4\u008di do najve\u00c4\u008dje zabele\u00c5\u00beene temperaturne razlike doslej. Na zgornji postaji je vso no\u00c4\u008d pihal vzhodni veter in zaviral no\u00c4\u008dno ohlajanje, hkrati pa je bil veter dovolj \u00c5\u00a1ibek, da je\u00c2\u00a0omogo\u00c4\u008dal neovirano ohlajanje v zati\u00c5\u00a1nih mrazi\u00c5\u00a1\u00c4\u008dih.\u00c2\u00a0Dolinca je bila od vremenske postaje Zaplana 21 m vi\u00c5\u00a1je hladnej\u00c5\u00a1a za 15,5 \u00c2\u00b0C, mrazi\u00c5\u00a1\u00c4\u008de Dvoj\u00c4\u008dek pa\u00c2\u00a0je bilo ob 1.15 zjutraj\u00c2\u00a0na vsega 14 m vi\u00c5\u00a1inske razlike hladnej\u00c5\u00a1e celo za 16,6 \u00c2\u00b0C. Razlika je v na\u00c4\u008dinu meritev, saj je bil termometer na vremenski postaji Zaplana name\u00c5\u00a1\u00c4\u008den v meteorolo\u00c5\u00a1ko hi\u00c5\u00a1ico, termometer v mrazi\u00c5\u00a1\u00c4\u008du Dvoj\u00c4\u008dek pa je bil\u00c2\u00a0v prostem ozra\u00c4\u008dju. Po primerjavah je temperaturna razlika med termometri\u00c2\u00a0pri \u00c5\u00bee ustaljeni temperaturi zanemarljiva, pri hitrem spreminjanju temperature pa lahko razlika zna\u00c5\u00a1a nekaj desetink stopinje Celzija.<\/p>\n

\"\"<\/a>\u00c4\u0152asovni potek temperature v no\u00c4\u008di na 22. februar na vremenski postaji Zaplana in v mrazi\u00c5\u00a1\u00c4\u008du Dvoj\u00c4\u008dek. V drugem delu no\u00c4\u008di se je zaradi vetra in\u00c2\u00a0raz\u00c5\u00a1iritve nizke obla\u00c4\u008dnosti\u00c2\u00a0temperatura v mrazi\u00c5\u00a1\u00c4\u008du postopno\u00c2\u00a0izena\u00c4\u008dila s temperaturo okolice.<\/em><\/p>\n

\"\"<\/a>Mrazi\u00c5\u00a1\u00c4\u008de Dvoj\u00c4\u008dek in vremensko postajo Zaplana\u00c2\u00a0lo\u00c4\u008di 300 m\u00c2\u00a0zra\u00c4\u008dne razdalje in 14 m vi\u00c5\u00a1inske razlike. Med merilnima mestoma je\u00c2\u00a022. februarja pono\u00c4\u008di\u00c2\u00a0trenutna\u00c2\u00a0temperaturna razlika dosegla skoraj 17 \u00c2\u00b0C. Zaradi ve\u00c4\u008dje nazornosti je uporabljena\u00c2\u00a0fotografija v poletnem ambientu.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Novej\u00c5\u00a1e primerjave ka\u00c5\u00beejo, da\u00c2\u00a0so termometri\u00c2\u00a0Madgetech, eden takih je v uporabi tudi v mrazi\u00c5\u00a1\u00c4\u008du\u00c2\u00a0Dolinca, glede na preostale razpolo\u00c5\u00beljive\u00c2\u00a0termometre dobro umerjeni pri vi\u00c5\u00a1ji temperaturi. V\u00c2\u00a0temperaturnem obmo\u00c4\u008dju med 0 \u00c2\u00b0C in -10 \u00c2\u00b0C pa se pri omenjenem termometru pojavi pribitek k\u00c2\u00a0temperaturi za 1 \u00c2\u00b0C. Odstopanje je bilo ugotovljeno pri vseh dosedanjih termometrih\u00c2\u00a0te vrste\u00c2\u00a0in tako termometer pri temperaturi -10 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[15],"tags":[],"_links":{"self":[{"href":"http:\/\/www.slometeo.net\/zaplana\/blog\/index.php?rest_route=\/wp\/v2\/posts\/6947"}],"collection":[{"href":"http:\/\/www.slometeo.net\/zaplana\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.slometeo.net\/zaplana\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.slometeo.net\/zaplana\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.slometeo.net\/zaplana\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6947"}],"version-history":[{"count":39,"href":"http:\/\/www.slometeo.net\/zaplana\/blog\/index.php?rest_route=\/wp\/v2\/posts\/6947\/revisions"}],"predecessor-version":[{"id":7000,"href":"http:\/\/www.slometeo.net\/zaplana\/blog\/index.php?rest_route=\/wp\/v2\/posts\/6947\/revisions\/7000"}],"wp:attachment":[{"href":"http:\/\/www.slometeo.net\/zaplana\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6947"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.slometeo.net\/zaplana\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6947"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.slometeo.net\/zaplana\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6947"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}