Mary Allen
A lokacin damina, ana yawan samun ruwan sama a wani yanki. Mutum kawai yana magana ne game da lokacin damina idan yana faruwa sau ɗaya ko sau biyu a shekara a lokaci guda na shekara. A kan taswirar duniya za ku iya gani: lokacin damina na faruwa ne kawai a cikin tsiri ɗaya a bangarorin biyu na equator.
Domin a samu lokacin damina, dole ne rana ta kasance kusan a tsaye a kan wurin da tsakar rana, watau daidai kan kawunan mutane. Sakamakon hasken rana, ruwa mai yawa yana fitowa daga ƙasa, daga tsire-tsire, ko daga teku da tafkuna. Yana tasowa, yayi sanyi a sama, sannan ya faɗi ƙasa kamar ruwan sama.
A watan Maris rana tana sama da ma'auni, sannan akwai lokacin damina a can. A watan Yuni yana kan iyakar arewa, sama da Tropic of Cancer. Sai lokacin damina. Rana ta sake komawa kan equator don kawo damina ta biyu a can a watan Satumba. Yana ƙaura zuwa kudu kuma yana kawo damina a can a watan Disamba a kan Tropic of Cancer.
Don haka, a yankin arewa da ke kusa da equator, akwai lokacin damina a lokacin rani namu. A cikin kudancin duniya kusa da equator, akwai lokacin damina a cikin hunturu. Akwai lokutan damina guda biyu akan equator: daya a cikin bazara da kuma daya a cikin kaka.
Koyaya, wannan lissafin ba koyaushe daidai bane. Haka kuma ya danganta da yadda kasar ke sama da matakin teku. Hakanan iskoki suna taka muhimmiyar rawa, misali, damina. Wannan kuma na iya canza lissafin duka sosai.
Kusa da equator, babu ainihin lokacin rani tsakanin lokutan damina. Ana iya samun watanni biyu ba tare da ruwan sama ba, amma wannan ba yana nufin kasar tana bushewa ba. Koyaya, a kusa da wurare masu zafi, lokacin rani yana da tsayi sosai, yana barin ƙasa ta bushe sosai. A nesa da equator babu damina kwata-kwata, misali a cikin hamadar Sahara.