Komawar kankara tun daga 1850

Komawar kankara tun daga 1850

Iri	aukuwa
Sanadi	Canjin yanayi

A cikin duka, kusan kashi 25 na kankarar da ta narke tsakanin 2003 da 2010 sun faru ne a cikin Amurka (ban da Greenland).

Komawar kankara tun daga 1850 ya shafi samuwar ruwa mai kyau don ban ruwa da amfanin gida, nishaɗin dutse, dabbobi da tsirrai waɗanda suka dogara da narkewar kankara, kuma, a cikin lokaci mai tsawo, matakin tekuna. Masu nazarin glaciologists sunyi nazari, haɗuwa ta lokaci na kankara tare da gwargwadon haɓakar iskar gas mai sau da yawa galibi ana ambata a matsayin hujja mai tushe na ɗumamar yanayi. Yankin tsaunukan tsakiyar latti kamar Himalayas, Rockies, Alps, Cascades, da kudancin Andes, kazalika da keɓewar wurare masu zafi irin su Mount Kilimanjaro a Afirka, suna nuna wasu daga cikin asara mafi girma daidai gwargwado.

Kankara ma'auni shine maɓallin ƙayyade lafiyar kankara. Idan adadin daskararren ruwan sama a cikin yankin tarawa ya wuce adadin kankara mai ƙarancin haske da aka ɓace saboda narkewa ko kuma a cikin yanki ɓarna wani kankara zai ci gaba; idan tarin bai kai yadda ake zubar dashi ba, kankara din zai koma. Kankara a ja da baya zasu sami ma'auni mara kyau, kuma idan basu sami daidaito tsakanin tarawa da zubar da ciki ba, ƙarshe zai ɓace.

Lokacin Kananan kankara ya kasance lokaci ne daga misalin 1550 zuwa 1850 lokacin da duniya ta ɗan sami yanayi mai ɗan sanyi idan aka kwatanta da lokacin da ya gabata da kuma bayan hakan. Bayan haka, har zuwa kusan 1940, kankara a duk duniya suna ja da baya yayin da yanayi ke ɗumi sosai. Bayan haka, har zuwa kusan 1940, kankara a duk duniya suna ja da baya yayin da yanayi ke ɗumi sosai. Ja da baya na launin fata ya yi jinkiri har ma ya sauya na ɗan lokaci, a lokuta da yawa, tsakanin 1950 da 1980 yayin da yanayin duniya ya ɗan yi sanyi. Tun daga 1980, dumamar yanayin duniya ya haifar da koma bayan dusar kankara ya zama mai saurin zama a koina, ta yadda wasu dusar kankara sun bace baki daya, kuma kasancewar galibin sauran kankarar na fuskantar barazana. A wurare irin su Andes na Kudancin Amurka da Himalayas a Asiya, ƙarancin kankara a waɗannan yankuna na da tasirin da zai iya shafar samar da ruwa a waɗannan yankuna.

Koma bayan dusar kankara, musamman a yammacin Arewacin Amurka, Asiya, Alps da yankuna masu zafi da na Kudancin Amurka, Afirka da Indonesiya, suna ba da hujja game da hauhawar yanayin duniya tun ƙarshen karni na 19. Saurin saurin komawa baya tun daga 1995 na fitattun kankara na kankara na Greenland da Yammacin Antarctic kankara na iya yin nuni da tashin tekun, wanda zai shafi yankuna bakin teku.