1452/1453 fashewar Kuwae

Wani fashewa dutsen mai ban mamaki a cikin 1452 ko 1453 ya haifar da babban sulfate na farko a cikin 1450s, wanda ya biyo bayan wani fashewa mai ban mamaki. Fashewar ta haifar da matsanancin hunturu na dutsen wuta, wanda ya haifar da daya daga cikin abubuwan da suka fi karfi a Arewacin Hemisphere. Wannan kwanan wata kuma ya dace da karuwar Little Ice Age . 

## Ranar sulfate spike
Shaidar farko game da babban fashewa a cikin shekarar 1450-1460 ya fito ne daga babban sulfate da aka rubuta a cikin kankara a Antarctica tare da rashin tabbas har zuwa 'yan shekaru. Nazarin farko a cikin 1990s da 2000s  ba daidai ba ne ya sanya kwanan wata na wannan asalin sulfate a cikin 1452/53 bisa ga babban rashin tabbas yayin da aka sanya caldera na Kuwae a Vanuatu ya zama tushen wannan ba daidai ba sulfate spike. Tun daga shekara ta 2012, bayanan sulfate masu tsawo bisa ga ainihin lokacin kankara sun canza kwanan wata na asali, mai yiwuwa Kuwae, sulfate spike zuwa 1458 kuma sun tabbatar da wani taron sulfate a cikin 1452/53.    Sabili da haka, fashewar 1452/53 na yanzu tana nufin sulfate spike wanda aka gano a cikin 2012, yayin da tsohuwar fashewar 1492/53, wanda ake zaton yana da alaƙa da Kuwae, wanda ake magana da sulfate spiki wanda aka sauya kwanan wata zuwa shekarar 1458 tun 2012.

## Rubuce-rubucen kankara da na bishiyoyi
An rubuta ƙwanƙolin sulfate na 1452/53 a duka Greenland da Antarctica, amma siginar sulfate a Greenland ta fi girma fiye da na Antarctica, tana ba da shawarar tushen dutsen wuta a cikin ƙananan latitudes na Arewacin Hemisphere. Sulfur isotope abun da ke ciki na 1452/53 sulfate ya nuna cewa fashewar ta fitar da iskar gas kai tsaye a cikin stratosphere, tare da tasiri mai mahimmanci akan ilmin sunadarai na yanayi da kuma yiwuwar sakamako ga yanayin duniya. Injin sulfur na stratospheric da aka sake ginawa na taron 1452/53 ya kiyasta cewa an yi amfani da kimanin gram 11 na sulfur a cikin stratosphere, kusan kashi ɗaya bisa uku na fashewar Dutsen Tambora na 1815, bisa ga wannan saitin rikodin sulfate.

## Tushen fashewar
Kuwae an haɗa shi da asalin 1452/53 sulfate wanda aka sake kwanan wata zuwa 1458 bisa ga daidaito mafi girma a cikin 2012. Tambayar ko Kuwae na iya zama ainihin tushen abin da ya faru na 1452/53 maimakon abin da ya gabata na 1458 ana zaton yana iya zama mara kyau saboda rarrabawar sulfate a Greenland da Antarctica. Rashin daidaituwa tare da mafi girma sulfate deposition a Greenland idan aka kwatanta da Antarctica yana nuna cewa tushen dutsen mai fitattun wuta yana cikin ƙananan latitudes na Arewacin Hemisphere. Rashin binciken tephra da ke da alaƙa da 1452/53 sulfate layer ya hana ganowa ta amfani da daidaitawar geochemical.

## Tarihin tarihi
Codex na Mexico sun bayyana sanyi na kaka a cikin 1453 wanda ya shafi aikin gona a duk tsakiyar Mexico.

Fashewar ta faru ne kafin faduwar Constantinople, ginshiƙi na ƙarshe na Daular Byzantine mai ƙarfi. Turks na Ottoman, karkashin jagorancin Sultan Mehmed II, sun kewaye birnin a ranar 5 ga Afrilu 1453 kuma sun ci shi a ranar 29 ga Mayu 1453. Pang ya sami ambaton tasirin dutsen mai fitattun wuta a cikin tarihin kwanakin ƙarshe na daular. Masana tarihi sun lura cewa lambunan birnin, wannan bazara, sun samar da kadan. A daren 22 ga Mayu 1453, wata, alamar Constantinople, ta tashi cikin duhu, ta cika annabcin mutuwar birnin. A ranar 25 ga Mayu 1453, wata tsawa ta fashe a birnin: "Ba zai yiwu a tsayayya da ƙanƙara ba, kuma ruwan sama ya sauka cikin irin wannan raƙuman ruwa cewa duk tituna sun cika". Kashegari, a ranar 26 ga Mayu 1453, duk birnin ya cika da hazo mai zurfi, yanayin da ba a sani ba a wannan ɓangaren duniya a wannan watan.