{"id":1557,"date":"2014-11-21T08:18:27","date_gmt":"2014-11-21T08:18:27","guid":{"rendered":"http:\/\/\/wpweb\/?page_id=1557"},"modified":"2020-10-16T09:50:09","modified_gmt":"2020-10-16T09:50:09","slug":"boirina","status":"publish","type":"page","link":"https:\/\/www.meteo.cat\/wpweb\/divulgacio\/equipaments-meteorologics\/observadors-meteorologics\/manual-de-lobservador\/fenomens-superficials-i-de-reduccio-de-la-visibilitat\/boirina\/","title":{"rendered":"Boirina"},"content":{"rendered":"\n<h2>Definici\u00f3:<\/h2>\n\n\n\n<p>S\u00f3n gotes d\u2019aigua o part\u00edcules molt higrosc\u00f2piques (amb molt contingut d\u2019aigua) que floten en l\u2019aire i que redueixen la visibilitat horitzontal en la superf\u00edcie.<br><\/p>\n\n\n\n<p>La visibilitat \u00e9s superior a 1 km i inferior als 10 km, perqu\u00e8 les gotetes d\u2019aigua en suspensi\u00f3 s\u00f3n m\u00e9s petites i es troben m\u00e9s disperses que en la boira.<\/p>\n\n\n\n<h2>Consells per a l\u2019observaci\u00f3:<\/h2>\n\n\n\n<p>La seva coloraci\u00f3 \u00e9s grisenca, tret que la distingeix sovint de la boira veritable. La humitat relativa \u00e9s igual o superior al 70% en terres interiors i del 80% en la costa o zones molt influ\u00efdes per la pres\u00e8ncia del mar o grans masses d\u2019aigua.<br><\/p>\n\n\n\n<p>Sovint \u00e9s dif\u00edcil distingir la calitja de la boirina, tot i que les petites difer\u00e8ncies de coloraci\u00f3 hi poden ajudar, no \u00e9s del tot fiable la difer\u00e8ncia de color.<br><\/p>\n\n\n\n<p>El m\u00e9s fiable \u00e9s disposar d\u2019aparell enregistrador d\u2019humitat relativa. En cas contrari, hi poden haver altres signes que puguin resoldre el dubte, per exemple l\u2019exist\u00e8ncia de n\u00favols baixos (si s\u00f3n estrats, millor) que \u00e9s senyal que el fenomen observat \u00e9s la boirina.<br><\/p>\n\n\n\n<p>La boirina sovint esdev\u00e9 un estadi intermedi cap a la formaci\u00f3 o la dispersi\u00f3 de la boira. Aquest fenomen es pot observar gaireb\u00e9 durant tot l\u2019any i a bona part de la geografia catalana.<\/p>\n\n\n\n<h2>Fotografies<\/h2>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"https:\/\/static-m.meteo.cat\/wordpressweb\/wp-content\/uploads\/2014\/11\/21084115\/BIG_021355615022712_00.jpg\"><img loading=\"lazy\" width=\"700\" height=\"526\" src=\"https:\/\/static-m.meteo.cat\/wordpressweb\/wp-content\/uploads\/2014\/11\/21084115\/BIG_021355615022712_00.jpg\" alt=\"Boirina\" class=\"wp-image-2931\"\/><\/a><figcaption>Fen\u00f2mens de reducci\u00f3 de visibilitat Boirina. Autor: Miquel Comas<\/figcaption><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Definici\u00f3: S\u00f3n gotes d\u2019aigua o part\u00edcules molt higrosc\u00f2piques (amb molt contingut d\u2019aigua) que floten en l\u2019aire i que redueixen la visibilitat horitzontal en la superf\u00edcie. La visibilitat \u00e9s superior a 1 km i inferior als 10 km, perqu\u00e8 les gotetes d\u2019aigua en suspensi\u00f3 s\u00f3n m\u00e9s petites i es troben m\u00e9s disperses que en la boira. [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":1222,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"template-sidebar.php","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"_links":{"self":[{"href":"https:\/\/www.meteo.cat\/wpweb\/wp-json\/wp\/v2\/pages\/1557"}],"collection":[{"href":"https:\/\/www.meteo.cat\/wpweb\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.meteo.cat\/wpweb\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.meteo.cat\/wpweb\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meteo.cat\/wpweb\/wp-json\/wp\/v2\/comments?post=1557"}],"version-history":[{"count":7,"href":"https:\/\/www.meteo.cat\/wpweb\/wp-json\/wp\/v2\/pages\/1557\/revisions"}],"predecessor-version":[{"id":29003,"href":"https:\/\/www.meteo.cat\/wpweb\/wp-json\/wp\/v2\/pages\/1557\/revisions\/29003"}],"up":[{"embeddable":true,"href":"https:\/\/www.meteo.cat\/wpweb\/wp-json\/wp\/v2\/pages\/1222"}],"wp:attachment":[{"href":"https:\/\/www.meteo.cat\/wpweb\/wp-json\/wp\/v2\/media?parent=1557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}