Yawan asarar kankara don Duniya ya karu da kashi 57% daga 0.8 zuwa ton tiriliyan 1.2 a kowace shekara tun daga shekarun 1990. A sakamakon haka, matakin teku ya tashi da kusan 35 mm. Yawancin asarar kankara ana danganta su da ɗumamar da Duniya.
Canjin yanayi, daya daga cikin mahimman batutuwan muhalli da ke fuskantar ɗan adam shine ƙarshen jerin hanyoyin haɗin gwiwar ɗan adam. Yanke dazuzzuka, masana'antu da sauran abubuwan da suka danganci su suna haifar da haɓakar iskar gas a cikin yanayi wanda hakan ke haifar da ƙarin hasken infrared wanda ke haifar da haɓakar zafin jiki na iska. Duniya (warming duniya). Mai dumi Duniya yana haifar da asarar ƙanƙara a duniya sakamakon narkewa musamman a cikin glaciers, a cikin tsaunuka da yankunan polar. Sakamakon haka, matakin teku ya tashi don haka haɗarin ambaliya a yankunan bakin teku da mummunan tasiri ga al'umma da tattalin arziki gaba ɗaya. Babban dalilin da Duniya ta asarar kankara shine warming duniya. Girman asarar ƙanƙara a cikin ƙididdiga masu yawa dangane da Duniya ta dumamar yanayi ba a san shi ba. Wani sabon bincike ya ba da haske kan wannan a karon farko.
Domin sanin adadin da aka samu Duniya rasa kankara a cikin shekaru talatin da suka gabata; tawagar binciken da farko sun yi amfani da bayanan kallon tauraron dan adam da aka tattara daga 1994 zuwa 2017. Don zanen kankara na Antarctic da Greenland, an yi amfani da ma'aunin tauraron dan adam kawai yayin da aka yi amfani da ɗakunan kankara na Antarctic, hadewar kallon tauraron dan adam da ma'aunin yanayi don ƙididdige canje-canje a cikin dutse. glaciers da kuma ga kankara na teku, an yi amfani da haɗin nau'i na ƙididdiga da kuma kallon tauraron dan adam.
Tawagar ta gano hakan Duniya Ya yi asarar ton tiriliyan 28 na kankara tsakanin 1994 da 2017. Babban hasarar da aka yi ita ce a kan kankara ta tekun Arctic (ton tiriliyan 7.6), dakunan kankara na Antarctic (ton tiriliyan 6.5), dusar kankara (ton tiriliyan 6.1) da takardar kankara ta Greenland (ton tiriliyan 3.8). Tan tiriliyan 2.5), takardar kankara ta Antarctic (ton tiriliyan 0.9), da kankarar tekun Kudancin teku (ton tiriliyan XNUMX). Gabaɗaya, asarar ta fi a Arewacin Ƙasar. Yawan asarar kankara don Duniya An karu da kashi 57% daga 0.8 zuwa ton tiriliyan 1.2 a kowace shekara tun daga 1990s. A sakamakon haka, matakin teku ya tashi da kusan 35 mm kuma asarar kankara da ke iyo ya rage albedo. Yawancin asarar kankara ana danganta su zuwa warming na Duniya.
Hawan ruwan teku zai yi mummunar tasiri ga al'ummomin da ke bakin teku nan gaba.
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Sources:
- Slater, T., Lawrence, IR, et al 2021. Bita labarin: Rashin daidaituwar ƙanƙara ta Duniya, Cryosphere, 15, 233-246, An buga: 25 Jan 2021. DOI: https://doi.org/10.5194/tc-15-233-2021
- ESA 2021. Aikace-aikace - Duniyarmu tana asarar kankara a ƙimar rikodin. An buga: 25 Jan 2021. Akwai akan layi a https://www.esa.int/Applications/Observing_the_Earth/CryoSat/Our_world_is_losing_ice_at_record_rate An shiga ranar 26 ga Janairu, 2021.
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