Tsinkaye na Antarctic

Oscillation na Antarctic (AAO, don rarrabe shi daga oscillation na Arctic ko AO), wanda aka fi sani da Yanayin Kudancin (SAM), yanayin canjin yanayi ne na kudancin kudancin wanda aka bayyana shi azaman belin iska mai karfi na yamma ko matsin lamba da ke kewaye da Antarctica wanda ke motsawa ko kudu a matsayin yanayin canjinsa.

Direban yanayi ne na Ostiraliya, yana rinjayar yanayin yanayin ƙasar - Yana da alaƙa da guguwa da guguwar sanyi waɗanda ke motsawa daga yamma zuwa gabas waɗanda ke kawo hazo zuwa kudancin Ostiraliya.

 Matakai da tasirin 
Dukkanin abubuwan da suka faru na SAM masu kyau da marasa kyau suna da kusan kwanaki goma zuwa makonni biyu, kodayake lokacin tsakanin abubuwan da suka dace da marasa kyau ba zato ba tsammani ba ne. Yawancin lokaci yana cikin mako guda zuwa 'yan watanni, tare da mummunan SAM ya fi yawa a cikin watanni masu sanyi kuma ingantaccen SAM ya fi tsawo a cikin watanni mai zafi. Iska da ke da alaƙa da Yanayin Kudancin Annular yana haifar da hawan teku na ruwan zurfi mai zurfi mai zafi tare da shelf na nahiyar Antarctic,   wanda aka haɗa shi da narkewar shelf na kankara,  wanda ke wakiltar yiwuwar hanyar iska wanda zai iya lalata manyan ɓangarorin kankara na Antarctic.

 Mai kyau 
A cikin kyakkyawan lokaci, belin iska na yamma wanda ke fitar da Antarctic Circumpolar Current yana karuwa kuma yana kwangila zuwa Antarctica. A cikin hunturu, wani lokaci mai kyau yana ƙara ruwan sama (ciki har da Ƙananan gabar gabas) a kudu maso gabashin Australia (sama da Victoria) saboda yawan kwararar bakin teku daga Tekun Pacific, yana rage ruwan sama a kudu maso yamma, kuma yana rage dusar ƙanƙara a yankunan alpine. A lokacin bazara da rani, wani lokaci mai kyau yana rage yiwuwar matsanancin zafi kuma yana ƙara ruwan sama a bakin teku, saboda haka yana sa bazara da rani su fi ruwan sama fiye da yadda aka saba. Wani lokaci mai kyau zai faru akai-akai tare da taron La Niña.

 Rashin jituwa 
Matsayinta mara kyau ya haɗa da belin da ke motsawa zuwa ma'auni, inda rage ruwan sama a kudu maso gabashin Ostiraliya a lokacin rani da kuma haɓaka yiwuwar zafi na bazara. Bugu da ƙari, hunturu yawanci zai kasance mai laushi fiye da yadda aka saba a kudu da kudu maso yamma tare da karin dusar ƙanƙara a yankunan alpine, amma ya bushe a gabar gabas saboda karancin ruwa a bakin teku daga gabas da toshewa ganuwar sanyi ta Babban Rarraba Range, wanda zai yi aiki a matsayin inuwa. Wannan matakin zai kasance mafi yawa tare da taron El Niño.

 Bincike 
A cikin shekara ta 2014, Nerilie Abram ta yi amfani da cibiyar sadarwa ta ƙanƙara mai saurin zafin jiki da kuma rikodin ci gaban itace don sake gina tarihin shekaru 1000 na Yanayin Kudancin. Wannan aikin ya nuna cewa Kudancin Annular Mode a halin yanzu yana cikin mafi kyawun lokaci a cikin akalla shekaru 1000 da suka gabata, kuma cewa abubuwan da suka faru a baya-bayan nan a cikin SAM ana danganta su da karuwar matakan iskar gas da kuma daga baya lalacewar ozone na stratospheric.

 Dubi kuma 

 Anticyclone
 Tsinkaye na Arctic
 Tsinkaye na Arewacin Atlantic
 Tsinkaye na shekaru goma na Pacific
 Rashin ƙarfi na shekaru arba'in

 Manazarta 

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