Sauyin yanayi na Dhaka

Dhaka ta fuskanci yanayi mai zafi, jika da ɗanshi.  Ƙarƙashin rarrabuwar yanayi na Köppen, Dhaka yana da yanayin jika da bushewar yanayi.  Birnin yana da lokacin damina na musamman, tare da matsakaicin zafin shekara na 25 °C (77 °F) kuma kowane wata yana nufin bambanta tsakanin 18 °C (64 °F) a watan Janairu da 29 °C (84 °F) a watan Agusta.[https://clearglobal.org/ha/sauyin-yanayi/  Kusan kashi 80% na matsakaicin ruwan sama na shekara-shekara na milimita 1,854 (73.0 in) yana faruwa ne a lokacin damina wanda ke gudana daga watan Mayu zuwa ƙarshen Satumba.  Kara gurbacewar iska da ruwa da ke fitowa daga cunkoson ababen hawa da sharar masana'antu babbar matsala ce da ke shafar lafiyar jama'a da ingancin rayuwa a cikin birni.  Jikunan ruwa da dausayi a kusa da Dhaka suna fuskantar lalacewa yayin da ake cika waɗannan gine-gine masu hawa da yawa da sauran ci gaban ƙasa.  Tare da gurɓata yanayi, irin wannan zaizayar ƙasa na barazanar lalata yawancin halittun yankin.

Yanayin sanyi ba sabon abu ba ne a ciki da kewayen Dhaka. Lokacin da yanayin zafi ya ragu zuwa  ° C (46 ° F) ko ƙasa da haka, mutanen da ba su da tufafi masu dumi kuma suna zaune a gidaje marasa isasshen zasu iya mutuwa daga sanyi.

 Abubuwan da suka shafi 
Dhaka tana da yanayin zafi mai laushi da bushewa. Lokacin ruwan sama yana kawo kusan 80% na matsakaicin ruwan sama na shekara-shekara na millimeters 1,854 (73 in) kuma yana faruwa tsakanin Mayu da Satumba. 

 Daminar Kudu maso Yamma na faruwa daga Yuni zuwa Satumba a cikin watannin bazara.  A wannan lokacin ruwan sama kamar da bakin kwarya ya yi kamari a birnin da ma kasar baki daya.  Ana yawan samun ambaliyar ruwa a Dhaka kusan kowace shekara. Guguwa mai zafi suna faruwa a cikin watanni na rani daga Afrilu zuwa Yuni sannan daga Satumba zuwa Disamba.  Wadannan guguwa na faruwa kusan kowace shekara a Bangladesh ko da yake karfinsu ya bambanta daga shekara zuwa shekara.  Guguwar guguwa ta zama ruwan dare gama gari a Bangladesh saboda tana ɗaya daga cikin ƙasashen da ake yawan fama da ita a duniya, bayan Amurka da Kanada.[1]Kanada.

 Tasirin canjin yanayi 
Canjin yanayi ya tilasta wa mutane da yawa a Bangladesh da ke zaune a yankunan karkara su yi ƙaura zuwa biranen da suka haifar da karuwar yawan mutanen da ke cikin ƙauyuka na Dhaka. Kamar yadda Bangladesh ke ƙasa da ƙafa 20 sama da matakin teku, akwai tsoro da damuwa cewa a ƙarshen karni na 21, fiye da kashi ɗaya cikin huɗu na ƙasar za su cika da ruwa kuma mutane miliyan 15 za su rasa muhallinsu saboda hauhawar matakin teku. Yawan jama'ar Dhaka, a halin yanzu mutane miliyan 13, ana sa ran zai karu zuwa miliyan 20 nan da shekara ta 2025. Wannan yana haifar da fargabar cututtukan da ke faruwa a cikin ruwa da barkewar wasu cututtuka da yawa. Wani rahoto na Majalisar Dinkin Duniya da WWF sun yi gargadin cewa Dhaka tana da haɗarin canjin yanayi a Asiya.

 Ruwan sama na Dhaka 
Lokacin damina yawanci yana farawa daga Yuni kuma yana ƙare a watan Satumba.  Mai zuwa shine ruwan sama na damina na shekara-shekara na ƴan shekarun baya bisa bayanai daga Sashen yanayi na Bangladesh.

 A shekara ta 2000, an rubuta jimlar 5,220 millimeters (206 in).
 A shekara ta 2001, an rubuta jimlar millimeters 5,590 (220 in).
 A shekara ta 2002, an rubuta jimlar millimeters 7,257 (285.7 in).
 A shekara ta 2003, an rubuta jimlar 4,934 millimeters (194.3 in).
 A shekara ta 2004, an rubuta jimlar millimeters 8,308 (327.1 in).
 A shekara ta 2005, an rubuta jimlar millimeters 6,903 (271.8 in).
 A shekara ta 2006, an rubuta jimlar millimeters 7,137 (281.0 in).
 A shekara ta 2007, an rubuta jimlar millimeters 8,895 (350.2 in).
 A shekara ta 2008, an rubuta jimlar millimeters 6,712 (264.3 in).
 A shekara ta 2009, an rubuta jimlar millimeters 6,252 (246.1 in).
 A shekara ta 2010, an rubuta jimlar 5,016 millimeters (197.5 in).

 Abubuwan da suka faru na matsanancin yanayi 
Abubuwan da suka faru na matsanancin yanayi ciki har da guguwa ta wurare masu zafi, guguwa, girgije da ambaliyar ruwa sun shafi Dhaka:

 A shekara ta 1956, kimanin millimeters 326 (12.8 in) na ruwan sama an rubuta shi a cikin awanni 24 a Dhaka. 
 A cikin 1970, guguwa ta Category-3 ta kashe mutane 500,000 a yankin bakin teku, wanda kuma ya yi mummunar tasiri a Dhaka.
 A shekara ta 1989, wata Guguwa ta kashe mutane 1,300 a cikin Dhaka Division.
 A cikin 1991, wani guguwa na Category-5 ya lalata bakin tekun Bangladesh, ya shafi Dhaka tare da ruwan sama mai tsanani da iska mai lalacewa.
 A shekara ta 2004, an rubuta rikodin 341 millimeters (13.4 in) mm na ruwan sama a Dhaka a cikin awanni 24. 
 A shekara ta 2009, kimanin 333 millimeters (13.1 in) na ruwan sama an rubuta shi a Dhaka a cikin awanni 24. 
 A cikin 2023, a ranar 16 ga Afrilu, yankin Dhaka ya rubuta matsakaicin  ° C (105.1 ° F), mafi girman zafin Afrilu a yankin tun 1965.

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