Como mun riga mun gabatar a baya, an bayyana karfin NAO ta hanyar bayanin NAO. Bayanin NAO shi ne bambanci tsakanin matsin lamba a matakin teku tsakanin tashoshi biyu da ke kusa da cibiyoyin Lowlands of Iceland da Highlands na Azores. Ana amfani da Stykkisholmur (Iceland) a matsayin tashar arewa, yayin da Ponta Delgada (Azores), Lisbon (Portugal) da Gibraltar ake amfani da su azaman tashar kudu.
La tabbataccen lokaci na bayanin NAO gabatar da wasu matsin lamba mafi girma fiye da yadda ya saba a cikin matsakaitan matsakaiciyar yanayi da zurfi fiye da ƙananan matsi a cikin Tekun Atlantika. Karuwar bambancin zafin jiki yana haifar da guguwar hunturu mai saurin wucewa da ke tsallaka Tekun Atlantika, da kuma motsawa zuwa arewa. A sakamakon wannan, lokacin sanyi mai zafi da zafi a cikin Turai kuma lokacin sanyi da sanyi a Kanada da Greenland. A wannan yanayin, gabashin Amurka na fuskantar yanayin sanyi da ɗumi. Misali, yawan yanayin hunturu / bazara na shekarar 1989, 1990 da 1995 ya faru ne sanadiyyar matsar da iska daga Arctic da Iceland zuwa yankin dake karkashin ruwa kusa da Azores da Iberian Peninsula, kuma iskar yamma tayi iska mai karfi akan Tekun Atlantika ta Arewa. Sauran iska mai ƙarfi daga yamma suna haifar da iska mai ɗumi da ɗumi sama da yankin Turai kuma hakan yana haifar da sanyin hunturu na teku.
La mummunan lokaci na bayanin NAO nuna a raunin tsakiyar matsin lamba mai rauni kazalika cibiyar Icelandic mara ƙarfi na matsin lamba. Rage ɗan tudu yana haifar da ƙasa, raunin kwarara yana ratsawa ta hanyar yamma maso gabas. Suna dauke da iska mai danshi zuwa Bahar Rum kuma a yayin da babu kwararar ruwa daga yamma zuwa gabas, iska Siberiya mai sanyi zata iya sauka zuwa latitude sosai, saboda haka mafi yawan zubar dusar kankara na iya faruwa a kudancin Turai. Koyaya, Greenland tana da ɗumi ɗumi lokacin sanyi. Matsakaicin yanayin lokacin sanyi / bazara na shekarar 1917, 1936, 1963, da kuma 1969 suna da iskar yamma mai laushi akan Tekun Atlantika ta Arewa wanda yayi daidai da lokacin hunturu na Turai.
Source: JIRA
godiya, ban sha'awa sosai!