Jorge Montt Glacier
 Jorge Montt Glacier | ||||
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glacier (en)  | ||||
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| Bayanai | ||||
| Mountain range (en) | Andes | |||
| Ƙasa | Chile | |||
| Wuri | ||||
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Jorge Montt Glacier wani dusar ƙanƙara ne na ruwan tide wanda ke cikin yankin Aisén na ƙasar Chile, kudu da garin Caleta Tortel.Ya ta'allaƙa ne a ƙarshe ƙarshen Kudancin Patagonian Ice Field,tsakanin wurin shaƙatawa na Bernardo O'Higgins. Bakin kogin Pascua yana kusa da gaban glacier calving gaba.
Jimlar magudanar ruwa na glacier kusan 510 square kilometres (200 sq mi). Ƙanƙarar glacier yana raguwa sosai a ƙananan tudu, inda zafin iska yafi girma.Tsakanin Ƙanƙara tsakanin 1975 zuwa 2000 yakai 3.3 metres (11 ft) a kowace shekara akan dukkan glacier, kuma ya kai 18 metres (59 ft)kowace shekara a mafi ƙasƙanci mafi ƙasƙanci.Gaban glacier calving ya sami babban koma baya na 8.5 kilometres (5.3 mi) acikin waɗancan shekaru 25 sakamakon raguwa da sauri. Ƙanƙarar ƙanƙara tana kashe kankara zuwa cikin tashar Baker.
Acikin 2000,NASA ta rubuta cewa:An kwatanta bayanan al'ada na al'ada daga 1970s da 1990s tare da bayanan NASA na Fabrairu 2000 Shuttle Radar Topography Mission don auna canje-canje a cikin kundin 63 mafi girma glaciers a yankin na tsawon lokaci.Masu binciken sun ƙaddamar da raguwar ƙimar filayen Icefields na Patagonia fiye da ninki biyu a cikin lokacin daga 1995 zuwa 2000 tare da lokacin daga 1975 zuwa 2000.[1]
A cikin Disamba 2011, an buga sabon bincike. "Masanin glaciologist da mai bincike na CEC Andrés Rivera ne ya gabatar da binciken, wanda ya mayar da hankali kan bincikensa kan canje-canje a cikin glacier tsakanin Fabrairu 2010 da Janairu 2011. Yin amfani da jerin hotuna 1,445 da aka ɗauka a tsawon wannan lokacin, masana kimiyya sun gano cewa glacier yana raguwa kusan ƙafa 82 a kowace rana, yana raguwa fiye da rabin mil a cikin shekara." [2]
Binciken Rivera ya nuna ƙimar ja da baya na glacier na musamman aikin fjord na musamman ne na wanka; na biyu sakamakon dumamar yanayi. A shekara ta 2010 an gano ragowar nothofagus (kudanci beeech) kuma daga baya an rubuta kwanan wata, "ƙaramar shekarun binnewa tsakanin 460 da 250 cal yrs BP."A cewar Rivera: "Sakamakon zobe na bishiya ya nuna yankin ya rufe yankin da wani tsohon daji mai girma wanda Nothofagus betuloides ya mamaye ("coigue de Magallanes" - Beech kudanci na Magellanic) tare da mutane masu matsakaicin shekaru kusan shekaru 150, tare da kasancewa tare da juna. kusan shekaru 300 ( jimlar tsayin tarihin lokaci). Shekarun radiocarbon tsakanin shekaru 250 da 450 BP daga bishiyu daga cikin bishiyoyin da aka zayyana sun nuna cewa an ɗauki samfuran zoben itacen daga wani daji mai girma wanda Glaciar Jorge Montt ya lalata a lokacin LIA."
Duba kuma
[gyara sashe | gyara masomin]- Jerin glaciers
- Komawar glaciers tun 1850
Manazarta
[gyara sashe | gyara masomin]- ↑ archive.org
- ↑ Juan Francisco Veloso Olguin: Jorge Montt glacier the fastest shrinking in Chile, study finds, santiagotimes.cl 7 December 2011