BBC紀(jì)錄片《冰凍星球》履于薄冰第8期:反射太陽的能量

[00:00:47]Killer whales are now a much more common sight in the Arctic. 現(xiàn)在在北極也常?？梢砸姷交ⅥL了 [00:03:51]Their tall fins make it difficult for them to travel under ice, 長(zhǎng)長(zhǎng)的鰭雖阻礙了它們?cè)诒麓┧? [00:09:01]but the longer summers mean they can travel much further north 但更長(zhǎng)的夏天使它們能去到更北的地方 [00:12:40]and make the most of the rich Arctic seas. 充分利用北極海洋里豐富的資源 [00:16:29]For animals and people, 在變幻莫測(cè)的北極 [00:24:56]it will be those that can adapt 對(duì)動(dòng)物和人來說 [00:26:53]who will thrive in a changing Arctic. 只有適者才能生存 [00:38:02]But the loss of sea ice isn't just an issue for the Arctic, 冰雪融化不單純是北極的問題 [00:41:17]because the state of the ice affects the climate of the whole planet. 因?yàn)楸┑臓顟B(tài)影響了整個(gè)地球的氣候 [00:48:20]Because it's white, 冰雪是白色的 [00:49:53]the ice reflects up to 90% of the Sun's energy. 它能將90%的太陽能量反射回去 [00:53:51]This is called the albedo effect 這叫做反射效應(yīng) [00:56:14]and it's why we often see heat haze in the Arctic, 這就是為什么在北極 [00:58:50]even when the air feels cold. 即使很冷 也能看到熱霾 [01:06:18]The frozen Arctic Ocean acts as a huge reflector,bouncing back the Sun's heat into space. 冰凍的北冰洋就像一塊巨大的反射鏡將太陽的熱量反射回去 [01:15:18]Throughout history, that has helped to cool the planet, 自古以來 這能幫助地球降溫 [01:19:18]but when the ice melts, it's a different story. 一旦冰雪融化就將是另外一番景象了 [01:26:51]Because sea water is dark, 因?yàn)楹Ｋ巧钌? [01:30:57]it absorbs most of the Sun's heat. 它吸收了大部分太陽的熱量 [01:34:08]In the Arctic, this can trigger a chain reaction, 在北極 這會(huì)觸發(fā)連鎖反應(yīng) [01:37:15]as the warming water melts more ice, 更多的冰雪被漸暖的海水融化了 [01:39:45]exposing more water to the Sun's heat. 變成了更多的海水 吸收太陽的熱量

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