Adadin iska

A cikin ilimin yanayi, yawan iska shine ƙarar iska da aka ayyana ta yanayin zafi da zafi. Yawan iska yana rufe daruruwan ko dubban miliyoyi masu yawa, kuma ya dace da halayen saman da ke ƙarƙashinsu. An rarraba su bisa latitude da yankunansu na nahiya ko na ruwa. Mafi yawan iska ana kiransa polar ko arctic, yayin da yawan iska mai zafi ana ɗaukar wurare masu zafi. Nahiyoyi da na sama na iska sun bushe, yayin da ruwan teku da damina ke da ɗanshi. Yanayin gaba yana raba yawan iska mai yawa tare da halaye daban-daban (zazzabi ko danshi). Da zarar yawan iska ya ƙaura daga yankin tushensa, ciyayi da ruwa da ke ƙasa na iya canza halinsa da sauri. Shirye-shiryen rarrabuwa suna magance halayen yawan iska, da kuma gyarawa

Rarabewa da sanarwa
Yankunan tushen yawan iska na duniya
Rarraba Bergeron shine nau'in rarrabuwar iskar da aka fi yarda da shi, kodayake wasu sun samar da ingantaccen juzu'i na wannan makirci a yankuna daban-daban na duniya.[Please note that the latitudes in the picture are incorrect on the northern hemisphere. 60 should read 70 and 30 should read 40. "American Air Mass Properties" Rarraba yawan iska ya ƙunshi haruffa uku. Wasiƙar farko ta bayyana ƙayyadaddun danshi - "c" yana wakiltar yawiska na nahiyar (bushe), kuma "m" yana wakiltar yawan iska na ruwa (danshi). Yankin tushensa ya biyo baya: "T" yana nufin Tropical, "P" yana nufin Polar, "A" yana nufin Arctic ko Antarctic, "M" yana nufin damina, "E" yana nufin Equatorial, kuma "S" yana nufin adiabatically bushewa da iska mai zafi da aka samu ta hanyar motsi mai mahimmanci a cikin yanayi. Misali, yawan iskar da ta samo asali daga hamada kudu maso yammacin Amurka a lokacin rani ana iya sanyawa "cT". Yawan iska wanda ya samo asali daga arewacin Siberiya a cikin hunturu ana iya nuna shi da "cA"."American Air Mass Properties"
American Meteorological Society
American Meteorological Society

manazarta