Perşembe , Haziran 27 2019
Başlangıç / Genel / ANTARKTİKA’DAKİ BUZ KAYBI 50 YIL ÖNCESİNE GÖRE 7 KAT ARTTI

ANTARKTİKA’DAKİ BUZ KAYBI 50 YIL ÖNCESİNE GÖRE 7 KAT ARTTI

Uluslararası bir araştırma grubunun “Proceedings of the National Academy of Sciences (USA)” da yayımladığı sonuçlar, Antarktika’daki yıllık buz kütlesi kaybının 50 yıl öncesine göre 7 kat arttığını gösteiyor.

Kaliforniya Üniversitesi Irvine’da çalışan Prof. Dr. Eric Rignot ve arkadaşları Antarktika’daki 176 havzayı içine alan 18 bölgedeki buz kütlesinin son 50 yıldaki değişimini incelemişler. Çalışmalar sırasında 1960’ların başından beri NASA’nın “Operation IceBridge” görevi kapsamında araştırma uçaklarıyla çektiği görüntülerden ve Landsat uydularının topladığı verilerden yararlanılmış. Sonuçlar 1969-1980 yılları arasında Antarktika’nın yıllık ortalama 40 milyar ton buz kaybettiğini gösteriyor. 2009-2017 dönemindeki yıllık ortalama buz kaybıysa 322 milyar ton. Bu durum 40 yıl öncesine göre Antarktika’daki buz kaybının 7 kat arttığı anlamına geliyor.

Elde edilen sonuçlar, en çok buz kütlesi kaybının sıcak okyanus sularına komşu olan bölgelerde yaşandığını gösteriyor. Tahminlere göre, eriyen buzullar dünya genelindeki deniz seviyelerinin bir santimetre üzerinde yükselmesine sebep oldu.

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