Guguwar Giovanna

Guguwar Tropical mai tsanani Giovanna guguwa ce mai karfi wanda ya shafi Madagascar. Giovanna ita ce ta Taron a cikin yanayin zafi, ta bakwai da ake kira guguwa, kuma ta uku a cikin Guguwa ta wurare masu zafi na 2011-12 a lokacin guguwa na Kudu maso Yammacin Tekun Indiya. An zargi Giovanna da mutuwar 35 a bakin tekun Madagascar, La Réunion, da Mauritius, kuma ita ce guguwa ta farko mai tsanani da ta shafi Madagascar tun lokacin da Cyclone Bingiza ya gabata.

 Tarihin yanayi 
Cyclone Giovanna ya samo asali ne daga raƙuman ruwa na wurare masu zafi a kan Tekun Indiya da ke kan hanyar zuwa kudu maso yamma a ranar 7 ga Fabrairu. Rashin jituwa na wurare masu zafi nan da nan ya zama Tropical Depression 09 a ranar 9 ga Fabrairu. A wannan rana, Cibiyar Gargadi ta Hadari ta inganta tsarin, ta ba shi sunan "12S". Guguwar ta kara karfi a cikin guguwa mai zafi kuma an ba ta sunan Giovanna. A ranar 10 ga Fabrairu, Giovanna ta ci gaba da karfafawa cikin guguwa mai tsanani. Daga baya a wannan rana, Giovanna ya shiga cikin saurin karuwa kuma ya zama guguwa mai zafi, saboda yanayin muhalli mai kyau.
Ba da daɗewa ba, Giovanna ta fara sake zagayowar maye gurbin ido  kuma ta raunana cikin guguwa mai zafi mai kama da Category 3-a ranar 11 ga Fabrairu, saboda iska mai ƙarfi a kusa da tsarin.  Koyaya, iska da ke kewaye da guguwar nan da nan ta raunana, kuma Giovanna ta sami damar sake ƙarfafawa cikin guguwa mai zafi yayin da ta gama sake zagayowar maye gurbin ido, wanda ya haifar da sabon ido mai girma kilomita 50 (31  a fadin.

A kusan 2200 UTC a ranar 13 ga Fabrairu (0100 EAT Fabrairu 14), Giovanna ya sauka a Andevoranto, Madagascar. Giovanna daga nan ya raunana cikin mummunan yanayi a ranar 14 ga Fabrairu. Da farko a ranar 15 ga Fabrairu, Giovanna ya koma cikin ruwa mai budewa, kuma ya yi tafiya zuwa kudu maso yamma a cikin 'yan kwanaki masu zuwa. A ranar 18 ga Fabrairu, Giovanna ya juya zuwa gabas, kuma guguwa ta shiga cikin ruwan zafi a kudancin tekun Madagascar ta hanyar guguwa mai karfi da ke kudu. Giovanna ta sake karfafawa cikin guguwa ta wurare masu zafi ta 2 kuma ta samar da ƙaramin ido. Koyaya, ba da daɗewa ba ido ya sake sake zagayowar maye gurbin ido, kuma ya sake fara raunana. A ranar 20 ga Fabrairu, Giovanna ya shiga wani yanki mai karfi na iska mai tsaye, wanda ya sauya tsarin zuwa kudancin cibiyar yaduwa kuma da sauri ya raunana tsarin zuwa cikin mummunan yanayi. A ranar 22 ga watan Fabrairu, ci gaba da tsaftacewa mai ƙarfi ya sa Giovanna ta lalace cikin raguwa. Ragowar guguwar ta ci gaba da arewa maso yamma washegari, saboda hulɗar Fujiwhara tare da tsarin da ya fi karfi a gabas, Moderate Tropical Storm Hilwa, kuma marigayi a ranar 24 ga Fabrairu, ragowar Giovanna ta ɓace a gabashin Madagascar.

 Shirye-shiryen da tasiri 
Babban raƙuman ruwa da aka kiyasta har zuwa    ya shafi bakin tekun Reunion kuma ya haifar da mutuwar mutum daya bayan an kwashe mutum zuwa teku. Wani mutuwar ya faru a Mauritius bayan wani mutum ya rasa iko da babur dinsa a lokacin mummunan yanayi kuma ya fadi a cikin wutar lantarki.

Akalla mutane 33 ne Giovanna ya kashe a Madagascar. Ambaliyar ruwa da iska mai karfi su ne manyan dakarun da ke lalata, baya ga guguwar da ta mamaye yankunan gabar teku da dama. Dubban mutane ne wannan guguwa ta shafa a duk fadin kasar Madagaska tare da ambaliya da iska mai karfi wanda galibi ya sa kashi 60% na gidajen suka lalace ko kuma sun lalace. Rahotanni sun nuna cewa kashi 75 zuwa 90% na gine-gine a wadannan yankuna guguwar ta lalata

 Dubi kuma 

 Guguwa mai zafi a cikin 2012
 Guguwar Enawo (2017) 
 Cyclone Batsirai (2022) - yana da irin wannan hanya da tsananin kuma ya faru kusan daidai shekaru goma bayan haka

 Manazarta