Babban Birnin Australiya

Australian High, wanda aka fi sani da tudun subtropical na Australiya,  babban yanki ne mai matsin lamba ko kuma anticyclone na subtropical wanda ke sauka tsakanin Babban Australian Bight a kudu zuwa Yankin Arewa a arewa.  Yawanci yana tsakanin digiri 25 zuwa 40 na latitude na kudu, dangane da kakar.

A lokacin rani, yawanci yana zaune a kudancin Australia a matsayin Australian Bight High,  inda yawanci yana samar da yanayin bushe a yankin da ke kusa. A cikin hunturu yawanci yana motsawa zuwa arewa, saboda haka yana ba da izinin sanyi da tsarin matsin lamba don komawa sama daga Babban Australian Bight kuma kawo ruwan sama zuwa mafi yawan sassan kudancin Australia. Babban yana daga cikin tsarin tsaunuka na subtropical kuma shine dalilin da ya sa babban bangare na Ostiraliya ya bushe zuwa rabin bushe.

 Bayyanawa 
Babban Australiya yana bin bambancin yanayi a Matsayin rana; ya fi karfi kuma ya fi tsayayya a lokacin rani na kudancin kuma ya fi rauni a lokacin hunturu lokacin da yake canzawa zuwa cikin Australiya, yayin da Tsarin gaba na yamma ya zama mafi aiki a yankin da ke kusa da Bight, don haka yana ba da damar gaba mai sanyi da tsarin matsin lamba don shiga jihohin kudancin.

Wannan toshewar matsin lamba yana nuna halayyar anticyclonic, yana zagaya iska a gefen agogo. Ya kasance kusan tsaye na dogon lokaci a kan Bight, saboda haka yana hana tsarin yanayi na gabas a duk kudancin Australia.

An lura da rami na girgije tare da fadada har zuwa kilomita 1,000 (mil 620) tare da saman 1,040 millibars. Babban na iya zama mai yawa don haɗawa tare da Tasman High a cikin Tekun Tasman, kusa da New Zealand.

 Tasirin 
Yankin anticyclonic yana samar da yanayin bushe, yana kawo zafi zuwa yanayin zafi a kudancin Australiya lokacin rani. Babban tasirin yana tasiri ga yanayin da yanayin yanayi na manyan yankuna na Ostiraliya; Rashin bushewar hamada ta Ostiraliya da fari na rani na kudancin Ostiraliya saboda babban raguwa da motsi na iska a cikin tsarin.

A cikin hunturu, lokacin da babban ya kasance a tsaye a kudancin Ostiraliya (a cikin wani lokaci mai kyau na SAM), zai iya toshewa ko maye gurbin gaban sanyi daga Bight, don haka ya ba da damar yanayin zafi zuwa kudu maso gabas. Koyaya, lokacin da babban ya kasance a kudancin Yammacin Ostiraliya, zai iya motsawa a cikin iska mai sanyi zuwa nahiyar, inda ake ƙara dusar ƙanƙara da ruwan sama a kudu maso gabas, musamman yankunan da ke yammacin Babban Rarraba Range (saboda Tasirin foehn).  Sabanin haka, babban babban dutse da aka kafa a ƙasa da Kudancin Australia na iya kawo ruwan sama mai ɗorewa zuwa gabar gabashin Australia, yayin da yake tabbatar da yanayi mai kyau ga Tasmania.

A yammacin ɓangaren, iska mai zafi mai bushewa daga arewacin tsakiya mai bushewa ta hanyar Kudancin Australia da Victoria, wanda ya haifar da yanayin zafi a waɗannan yankuna. Australian High yana daya daga cikin direbobi na Southely buster, wanda ke faruwa a kudu maso gabas a lokacin rani.[1] A cikin hunturu, lokacin da tsarin matsin lamba ya fi girma a kan ƙasar Australiya, sanyi mai yawa na iya faruwa.[2]￼

 Tasirin da ya shafi Asiya 
A lokacin hunturu na kudanci, Australian High yana daya daga cikin dakarun motsa jiki a bayan Monsoon na Kudancin Asiya. Iska ta Easter tana busawa daga tsakiyar tsaunuka zuwa Asiya, kuma ana karkatar da su a kudu maso yamma zuwa Indiya bayan sun haye ma'auni saboda Tasirin Coriolis.

 Tasman High 
Tsakanin lokacin rani da kaka, ana iya haɗa saman kudancin Australia, ko kuma zai haɗu, tare da Tasman High a kudancin Tekun Tasman. Lokacin da manyan wuraren zama a cikin Tekun Tasman kuma suka zama babban toshewa, New Zealand da Tasmania gabaɗaya za su fuskanci yanayi mai dumi da bushewa gabaɗaya, yayin da gabar gabashin Australia (musamman kudancin Queensland da New South Wales) za su fuskanta ruwa mai laushi a bakin teku, musamman a lokacin La Niña. A watan Maris na 2021, da kuma a watan Fabrairu da Maris na 2022, wani tsauri mai tsauri a kudancin Tekun Tasman ya haifar da ruwan sama mai yawa da ambaliyar ruwa a manyan sassan kudu maso gabashin Queensland da bakin tekun New South Wales.

 Dubi kuma 

 Yanayin yanayi na Ostiraliya
 Mai kunna dutse

 Manazarta 

 Hanyoyin haɗin waje 

 Binciken alaƙar da ke tsakanin tudun Australiya, bambancin ruwan sama da kuma tsarin yaduwar latitude.
 Tasirin Canjin Scale na Duniya a kan Subtropical Ridge a kudu maso gabashin Australia