antar k ti k a
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Antar k ti k a. Pogled iz satelita. Kontinent Antarktika nalazi se na Sjevernom polu. Na njemu vladaju jedinstveni geografski, klimatski i biološki uvjeti. Od svih mjesta na našoj planeti, upravo na Antarktici temperatura dostiže najniže vrijednosti, čak i do - 70° C, - PowerPoint PPT PresentationTRANSCRIPT
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Antarktika
Pogled iz satelita
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Kontinent Antarktikanalazi se na Sjevernompolu.
Na njemu vladaju jedinstveni geografski, klimatski i biološkiuvjeti.
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Od svih mjesta na našoj planeti,upravo na Antarktici temperatura dostiže najniže vrijednosti, čak i do -70° C, a vjetar brzinu i do 300 km/h.
Budući da Antarktika sadrži 90% leda na našoj planeti, ona je najveći i najdragocjeniji izvor vode na Zemlji.
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Oko 99% Antarktike je prekriveno ledom čija je prosječna debljina 2,5 metra, a na nekim mjestima dostiže dubinu i od 4,776 metara.
Kad bi se taj led otopio, razine svih oceana podigle bi se za 70 metara.
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Antarktika djeluje kao veliki zemljin “hladnjak”. Ima značajan utjecaj na oceanske struje i na klimu na Zemlji.
Svaka značajnija promjena u njezinom okolišu uzrokovala bi velike promjene u klimi na cijeloj Zemlji, sa zastrašujućim posljedicama.
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Usprkos surovim vremenskim prilikama na Antarktici, postoje životinjske vrste zadivljujuće prilagođene teškim uvjetima života.
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Dolaskom prvih turista pedestih godina, pojavila se i potreba brige za okolišem.
Uvedeni su strogi propisi i pravila ponašanja.Tako npr. uvedene su ograničene zone, propisana sigurna udaljenost od divljih životinja, zabranjeno je hraniti i dirati životinje, a ujedno se i strogo pazi da ne dođe do odlaganje otpada.
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Ljeti (čiji je glavni dio u siječnju)
dnevno svjetlo traje gotovo 24 sata na dan,
dok je u zimskim danimačesti sumrak
(pola dnevne svjetlosti)gotovo svih 24 sata.
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Images :
Hans RietecoThomas KunzVeronique SoulierThorsten BübelbergusexChrista and BerdZeitlJ. EnsJ LowrenceHan Wilhem PrechUwe Möokelmann
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Music: Royal Philharmonic Aria di amore ( Tosca )Conducted and arranged by Luis de Cobos from Spain.
Created by: Manuel, Mérida, Yucatán, México.
English Version: P@blosonic, Las Vegas NV, USA