Siberian High

Siberian High
anticyclone (en) da center of action (en)
Bayanai
Ƙasa	Rasha, Mangolia, Kazakystan da Sin
Yana haddasa	Q115250746
Wuri
66°53′00″N 93°28′00″E / 66.88333°N 93.46667°E / 66.88333; 93.46667

Babban Siberiya (kuma Siberian Anticyclone; Russian: Азиатский антициклон (Aziatsky antitsiklon )) tarin busasshiyar iskar sanyi ce mai tarin yawa wacce ke taruwa a yankin arewa maso gabashin Eurasia daga Satumba zuwa Afrilu.Yawancin lokaci yana kan tafkin Baikal.Ya kai girman girmansa da ƙarfin sa acikin hunturu lokacin da yawan zafin jiki na iska kusa da tsakiyar yankin matsa lamba yakan yi ƙasa da −40 °C (−40 °F).Matsin yanayi sau da yawa yana sama da 1,040 millibars (31 inHg). Babban Siberiya shine mafi ƙarfi mai tsayi mai tsayi a arewaci kuma yana da alhakin duka mafi ƙarancin zafin jiki a Arewacin Hemisphere, na −67.8 °C (−90.0 °F) a ranar 15 ga Janairu 1885 a Verkhoyansk, kuma mafi girman matsa lamba, 1083.8 mbar (108.38 kPa, 32.01 inHg) a Agata, Krasnoyarsk Krai, a ranar 31 ga Disamba 1968, an taɓa yin rikodin. Babban Siberiya yana da alhakin tsananin sanyi na hunturu da yanayin bushewar ma'aikaci tare da ƙarancin dusar ƙanƙara da ƙarancin dusar ƙanƙara ko ƙanƙara a cikin Siberiya, Mongoliya, da China. Alokacin rani, Babban Siberiya an maye gurbinsa da ƙananan Asiya.

 

Babban Siberiya yana rinjayar yanayin yanayi a mafi yawan sassan Arewacin Hemisphere: tasirinsa ya wuce zuwa yamma har zuwa Italiya,yana kawo yanayin daskarewa kuma acikin kudanci mai ɗumi,da kuma kudu maso gabas kamar Malaysia,inda muhimmin bangare ne na damina daga arewa maso gabas. Wani lokaci babban Siberiya mai ƙarfi yana iya kawo yanayin sanyi da ba a saba gani ba a cikin wurare masu zafi har zuwa kudu maso gabas kamar Philippines.Yana iya toshe ko rage girman ƙananan ƙwayoyin cuta kuma ya haifar da bushewar yanayi a duk faɗin yankin Asiya banda yankuna, kamar Hokuriku da Tekun Caspian na Iran waɗanda ke samun ruwan sama na orographic daga iskar da take haifarwa.Sakamakon babban kogin Siberiya,lokacin sanyi na bakin teku a babban birnin Pacific na Rasha Vladivostok yanada sanyi sosai dangane da latitude da kusancinsa da teku.

Gaba ɗaya iskan Siberiya ya fi iskan Arctic sanyi,domin sabanin iskan Arctic dake kan kankarar tekun dake kewayen Pole ta Arewa,iskar Siberiya ta kanyi sanyin tundra mai sanyi na Siberiya, wanda ba ya hasko zafi kamar yadda kankarar Arctic keyi.

Gaba ɗaya, tsarin Siberian Babban matsin lamba ya fara haɓakawa a ƙarshen Agusta,yakai ƙololuwar sa acikin hunturu,kuma yana da ƙarfi har zuwa ƙarshen Afrilu.Asalin halittarsa a ƙarshen lokacin rani na Arctic yana faruwa ne sakamakon haɗuwar iskar rani da ake sanyayawa a cikin arewa maso gabashin Asiya yayin da kwanaki ke raguwa. Acikin aiwatar da samuwar Babban Siberiya, jirgin sama mai saukar ungulu yana canjawa wuri zuwa arewacin Eurasia ta hanyar sanyaya mai sanyi da saukowa advection,wanda acikin matsanancin yanayi yana haifar da"ƙananan sanyi"waɗanda ke fashewa a wurare masu zafi na Gabashin Asiya.

Duk da tasirin da yake da shi a yanayin da yawancin al'ummar duniya ke fuskanta, binciken kimiyya na Babban Siberiya ya yi jinkirin zuwa, kodayake an lura da bambancin halayensa tun farkon shekarun 1960. Koyaya, binciken baya-bayan nan na lura da dumamar yanayi a kan Asiya ya nuna cewa rauni na Siberian High shine babban direban lokacin sanyi a kusan dukkanin ƙasashen Asiya masu zafi na cikin gida har ma da mafi yawan sassan Turai, tare da dangantaka mafi ƙarfi a kan. Filin Yammacin Siberiya da muhimmiyar alaƙa har zuwa yamma har zuwa Hungary da kudu maso gabas har zuwa Guangdong . Har ila yau, an gano hazo yana da alaƙa da ma'anar matsakaicin matsa lamba na Babban Siberiya a kusan dukkanin Gabashin Turai a lokacin lokacin sanyi, kuma ana samun irin wannan dangantaka a kudancin kasar Sin, yayin da akasin haka ya kasance a kan gabar Coromandel da Sri. Lanka . Sauran nazarin sun nuna cewa ƙarfin Siberian High yana nuna rashin daidaituwa tare da tsarin matsa lamba akan Arewacin Afirka. An lura da wani haɗin kai, haɗin kai mai rauni na Siberian High da Arctic oscillation lokacin da Antarctic oscillation (AAO) ya fi karfi.

Saboda karuwar dusar ƙanƙara da murfin ƙanƙara yana haɓaka Babban Siberiya, Babban Siberiya ya kasance mafi tsananin ƙarfi kuma yana gaba da yamma a farkon Pleistocene na Tsakiyar Tsakiyar sakamakon faɗuwar glaciation na jeri na tsaunuka a tsakiyar Asiya ta Tsakiya. Rage girman girman Siberian a lokacin Holocene ya ba da damar mamaye gabas na yamma da aka wadatar da tururin ruwa, wanda ya haifar da haɓakar ƙarancin tsayin daji na tsakiyar Asiya.

• Siberian Express
• Arctic dipole anomaly
• Kalaman sanyi
• Arewacin Amurka High
• Polar vortex
• Aleutian Low