Yini i-ice pack?

Iqhwa lasolwandle

La ukupakisha Luyi-ice sheet entantayo eyakha ezindaweni ezisolwandle. Ukusinda kwamabhere asezindaweni ezibandayo kuncike ekwakhekeni kokuqala kwale ndawo eneqhwa, ngoba kungahamba ngayo ngakho-ke, ngokuzingela. Kepha sizokhuluma ngakho kamuva.

Manje sizogxila kulokho okuyikho i-ice pack, ukuthi yakhiwa kanjani, futhi uyini umehluko phakathi kwaleyo eyakhiwe e-Antarctica naleyo eyakhiwe e-Arctic.

Lakhiwa kanjani iphakethe leqhwa?

Pakisha

Amanzi aba yiqhwa phezulu, kwazise leli elingezansi lifudumele ngoba linobunzima bokukhuphula izinga lokushisa kwalo lapho imisebe yelanga ebuthakathaka kakhulu ifinyelela kuyo, kakhulu kunalapho isivele ifinyelela ebusweni bamaPole. Ngakho-ke, iqala ukuqina lapho ukuncibilika / ukuqina kwephoyinti elihambisana nosawoti kuncipha, okwaziwa njengokwehla kwe-cryoscopic.

Kamuva, ziyakhiwa amakristalu amancane e-lenticular amanzi ahlanzekile, ahlangana futhi agcine akhe indawo efriziwe efriziwe ngokuphelele, enobukhulu obuzungeze imitha eli-1 uma ivuselelwa minyaka yonke, yize ingafika ku-20m kwamanye amaphuzu uma iqhubeka ngokuhamba kwesikhathi.

Ngabe i-Antarctica yehluke kanjani kwi-Arctic?

I-Antarctica ice floe

Ama-ice sheet e-Antarctic nase-Arctic, yize engafana kakhulu, empeleni ahluke kakhulu:

  • I-Antarctica: ngenyanga eseningizimu kaDisemba, icishe inyamalale ngokuphelele. Ebusika, iyakheka futhi, ize ihlanganise cishe lonke izwekazi. Ukukunikeza umbono wokuthi ushintsha kanjani ezinkathini ezahlukahlukene, kufanele wazi ukuthi ngoSepthemba, phakathi nenkathi ebandayo noma iPolar Night njengoba ibizwa kanjalo, ifinyelela ku-18,8 million km2, ngenkathi ngoMashi, ngenkathi efudumele Usuku lwePolar, lwehliselwe ku-2,6 million km2. Ngakho-ke kuyinto yesikhashana ebandayo.
  • I-Arctic: ngakolunye uhlangothi lomhlaba, inhlabathi efriziwe ihlale injena, iqandisiwe. Izingxenye eziseduze kwamazwekazi azungezile ziyancibilika minyaka yonke, umzuzwana abawusebenzisela ukuzulazula e-Arctic Ocean. Noma kunjalo, ibuye ibe nezinguquko unyaka wonke: ngoMashi ifinyelela ku-15 million km2, kuthi ngoSepthemba ifinyelele ku-6,5 million km2.

Ungakwazi ukubapheqa?

Iqhwa elisesiqhingini

Emakhulwini amaningi eminyaka kube nabantu abahlukahlukene, njengoSir John Franklin (1786-1847), isikhulu sezasolwandle kanye nomhloli wamazwe wase-Arctic, abafuna ukufuna lokho okuthiwa Umzila waseNyakatho-ntshonalanga (Northwest Passage ngesiNgisi), okuyigama lapho umzila wolwandle onqamula iNyakatho Melika waziwa ukusuka enyakatho, unqamula i-Arctic Ocean futhi uxhuma iDavis Strait neBering Strait, okungukuthi, i-Atlantic Ocean kanye Pacific Ocean, kepha kuze kube manje ayikatholakali. Ngiyaphinda, kuze kube manje.

Iqiniso ngukuthi kunalabo abacabanga ukuthi ngenxa yokufudumala kwembulunga yonke iqhwa lase-Arctic lingancishiswa ngokwanele ukuze likwazi ukuzulazula kulo. Eqinisweni, baqinisile, kangangoba kunjalo Ngo-Agasti 21, 2007 iNorthwest Passage yayivulekele ukuhamba olwandle ehlobo, futhi ngaphandle kwesidingo sokusebenzisa imikhumbi ephihliza iqhwa. Bekungokokuqala ngqa selokhu kwaqalwa amarekhodi ngo-1972 ukuthi lesi sinyathelo sisuswe. Ezikhathini zakamuva nje, ngaphandle kokuqhubeka, ngo-2016, besivele sikukwazisa lokho umkhumbi onabantu abangaphezu kuka-1.600 16, kuhlanganise nabagibeli abayinkulungwane, wawuzosuka e-Alaska ngo-Agasti 20, ufike eNew York ngoSepthemba XNUMX.

Vele, abantu bebehlala benaso leso sidingo nalokho kuzikhohlisa ukubona umhlaba, kepha lokhu kungadala izingxabano phakathi kwabakulezi zifunda (hhayi abantu kuphela, kepha nezilwane eziza ukuzobhekabheka).

Yimiphi imiphumela iphakethe leqhwa elinayo kwisimo sezulu somhlaba jikelele?

I-Arctic Ocean

Iqhwa lasolwandle elifriziwe linemiphumela hhayi ezifundeni lapho lenza khona kuphela, kepha nasesimo sezulu seplanethi yonke. Inemiphumela emibili emikhulu:

  • Kuvikela ulwandle, njengoba lusebenza njengesivikelo esivimbela ulwandle ekubandeni. Ngakho-ke, ukwabiwa kokushisa emhlabeni kuyalawulwa.
  • Umhlophe weqhwa ekhombisa kakhulu, okunikela ku-albedo esemaplanethi, okuyingxenye yemisebe yelanga ebuyiselwa emkhathini.

Yiziphi izilwane ezizuzayo ngeqhwa?

Ibhele elihlala kwiqhwa

I-Los amabhere polar yizilwane esizazi kakhulu. Yizilwane ezincelisayo ezinkulu kunazo zonke e-Arctic, futhi zidinga ukuzingela ukuze ziphile. Ukuze benze lokhu, bathembele eqoqweni leqhwa, yize ikhava yeqhwa incipha ngokuncipha: phakathi kuka-1979 no-2011, yehle ngo-14% eminyakeni eyishumi. Lokhu kubaphoqa ukuthi babhukude kakhulu, bebeka impilo yentsha neyabo engcupheni.

Kunezinye izilwane, njenge ama-focas, the crustaceans (krill), inhlanzi ezakha uchungechunge lokudla okuthi, ngaphandle kokuthi kuthathwe izinyathelo ezisebenzayo zokunqanda ukufudumala kwembulunga yonke, imiphumela yakho ingaphazamisa ukulingana kwalesi simiso semvelo esibucayi.


Okuqukethwe yi-athikili kunamathela ezimisweni zethu ze izimiso zokuhlelela. Ukubika iphutha chofoza lapha.

Amazwana ayi-3, shiya okwakho

Shiya umbono wakho

Ikheli lakho le ngeke ishicilelwe. Ezidingekayo ibhalwe nge *

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  1. Ubhekele imininingwane: Miguel Ángel Gatón
  2. Inhloso yedatha: Lawula Ugaxekile, ukuphathwa kwamazwana.
  3. Ukusemthethweni: Imvume yakho
  4. Ukuxhumana kwemininingwane: Imininingwane ngeke idluliselwe kubantu besithathu ngaphandle kwesibopho esisemthethweni.
  5. Isitoreji sedatha: Idatabase ebanjwe yi-Occentus Networks (EU)
  6. Amalungelo: Nganoma yisiphi isikhathi ungakhawulela, uthole futhi ususe imininingwane yakho.

  1.   ulucia maritns kusho

    i-athikili enhle ingisizile kakhulu ngomsebenzi obekufanele ngiwenze

    1.    UMonica sanchez kusho

      Ngiyajabula ukuthi kukusizile, Lucia 🙂.

  2.   u-sergio hernandez kusho

    Isimo semvelo esifanelekile siyamangalisa nokuthi umuntu ubephethe kanjani ukwehliswa isithunzi ngu-oco lelo bhalansi lihle kakhulu lo mbhalo futhi lonke lolu lwazi lungisizile ukwazi okwengeziwe ngale ndaba yezilwane nokuthi iplanethi ikwazise kanjani lokho abantu abangaphezu kwezigidigidi eziyisishiyagalombili ukumisa lokhu ngaphambi kokuba kube ukukhala nje.