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[BBC系列]：南极洲（地平线）Antarctica (Horizon)-1080P高清迅雷网盘下载
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由Jo Unwin主持并由??BBC发行的《自然》科学纪录片，作为1997年BBC Horizo??n系列的一部分播出-英语旁白Nature, Science Documentary hosted by Jo Unwin and published by BBC broadcasted as part of BBC Horizon series in 1997 - English narration
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南极洲的极地冰原是地球上最高，最冷，最风，最干燥和最无情的地方。干旱的撒哈拉沙漠每年只有不到5厘米的积雪，也很寒冷。南极附近的平均温度为摄氏49度，每小时风速超过200公里。??Ice Lives Craig MacClean是Beach Boys的粉丝，他喜欢在加州的阳光下闲逛，喜欢在足球比赛中喝点啤酒。但是今年冬天，他将在南极洲麦克默多综合医院担任医疗用品负责人，而液态水是生命的本质，因此稀缺。然而，这片荒凉的大陆现在已成为地球上的最后一个边界-每年有3,000名殖民者试图在此定居。与地球上任何外星人一样，在外地景观中生活的成功是生物上的畸变。它提供了关于生命系统局限性的有趣见解，这就是为什么许多人类游客都是生物学家的原因。他们研究企鹅，海豹和线虫-少数其他也可以在冬天过冬的高级生命体-试图发现它们如何适应冰柜中的生活。但这也是为什么组成南极殖民地人口的科学家，支持人员和武装部队自己受到调查的原因。克雷格·麦克林（Craig Maclean）只是三十个对象之一，这是人类实验的一部分，该实验旨在寻找智人的生活在冰上。[编辑]??冰的形式Beardmore冰川是斯科特（Scott）和沙克尔顿（Shackleton）拖到南极的一条蜿蜒曲折的路线。它提供了从海岸，跨南极山脉到极地高原和南极广阔荒原的最直接路线，如今它已被最新一代的南极英雄飞过，并且也提供了提示和线索这可能解释了这片大陆的形成方式。南极洲只是曾经存在的最大的大陆之一的一个小片段。它一个人坐着，固定在南极，而曾经是它一部分的陆地浮起，形成了南非，印度，澳大利亚和南美的其他大洲。地质学家一直认为，这种破碎过程是由裂谷驱动的。裂谷是板块构造运动将大陆分开的通常过程。冰川学家通过论证说南极洲与新西兰的分离导致南洋洋形成了环形洋流而完成了南极洲形成的故事，据称这导致了大约一千八百万年前的非洲大陆变得寒冷。然而，在过去的十年中，南极洲持续勘探中发现的新发现对这一观点提出了挑战：继斯科特（Scott）的脚步之后，英国，美国和新西兰的南极科学家的旅程为造就南极洲的事物绘制了全新的图画。来自地球的巨大火山上升流?的地幔-羽状-可能提供了使冈瓦纳超级大洲分裂并使其变冷的条件。但是，地质的持续力量可能导致可怕的可能性，那就是它可能不会一直保持这种状态。[编辑]??冰融化了“灾难性”-“灾难性”-“崩溃”：南极洲是世界气候中一个未知数，它的晦涩之处意味着它一直Antarctica's polar ice sheet is the highest, coldest, windiest, driest and most unforgiving place on earth. Dry as the Sahara Desert with less than 5cm of snow a year it is also numbingly cold.The average temperature near the South Pole is minus 49 degrees Centigrade, and winds reach over 200Km an hour.[edit] The Ice Lives Craig MacClean is a Beach Boys fan, he likes hanging out in the California sun, and drinking the odd beer at a football game. But this winter he'll be in Antarctica working as chief of medical supplies in McMurdo General Hospital.Water in a liquid form, the essence of life, is scarce. Yet this inhospitable continent has now become the last frontier on earth - and each year a population of 3,000 colonists try to settle here.The success of life in a landscape as alien as any on this planet is a biological aberration.It hints at the possibility of extra-terrestrial life as it provides intriguing insights into the limits of living systems.This is why many of the human visitors are biologists. They study the Penguins, the seals and the nematodes - the few other higher life forms that also survive the winter here - to try and discover how it is they have adapted to life in the freezer. But it is also why the scientists, support staff and the armed forces that make up the colonial population of Antarctica are themselves under investigation.Craig Maclean is just one of thirty subjects - part of a human experiment that is finding out what happens to Homo sapiens on ice.[edit] The Ice Forms The Beardmore Glacier was the crevasse-riddled route Scott and Shackleton man-hauled up to the South Pole. It provided the most direct route from the coast, over the Transantarctic Mountains onto the vast flat waste of the Polar Plateau and to the South Pole.Today it is flown over by the latest generation of Antarctic heroes and it is also providing the hints and clues that may explain how this continent formed.Antarctica is just a tiny fragment of one of the biggest continents that has ever existed: Gondwanaland. It sits alone, fixed at the South Pole, while the land-masses that used to be part of it have floated off to form the other great continents of South Africa, India, Australia and South America.Geologists always believed that this process of fragmentation was driven by rifting - the usual course of plate tectonics pushing continents apart. And glaciologists completed the story of Antarctica's formation by arguing that the separation of Antarctica from New Zealand led to the creation of a circular current in the Southern Ocean.It was this that supposedly led to the continent becoming cold about 18 million years ago. Yet in the last decade discoveries emerging from the continuing exploration of Antarctica have challenged this view.Following in the Footsteps of Scott, the journeys of British, American and New Zealand Antarctic scientists are drawing a radical new picture of what created Antarctica.It seems that a vast volcanic upwelling from the earth's mantle - a Plume - may have provided the force that broke the Gondwana super-continent apart and created the conditions that made it cold . But the continuing forces of geology may be responsible for the frightening possibility that it may not always stay that way.[edit] The Ice Melts "Calamity" - "Catastrophe" - "Collapse": Antarctica is the great unknown in the world's climate and its obscurity means that it has always been played as the wild card in global change. But it was Antarctica, protected by global treaty and kept pristine by environmental protocol, that actually gave the first solid evidence of the impact refrigerators and aerosols were having on the atmosphere. And it is Antarctica, the last great wilderness, hard to get to, harder to work in, that is now seen in almost biblical terms as the source of the next Great Flood.The Western Antarctic Ice Sheet is the last Marine Ice Sheet on earth, and how it responds to warming past and present will determine the fate of great tranches of coast from Miami to Essex."Complete collapse of the Ice Sheet would raise sea levels by six meters" .Yet in spite of the threat contained in this great reservoir of water no one knows quite what keeps it in check, how the ice sheet maintains its cycle of growth through snowfall and decline through the calving of icebergs at the continent's edge."The Ice Melts" is a detective story, as scientists scattered on the Ice Sheet try in a myriad of ways to understand the mechanisms that control it. At Siple Dome a large deep field camp, one group of American researchers are drilling for the climate core that will show if the Ice Sheet collapsed during the last interglacial.Others investigate Ice Streams, mysterious glacial phenomena that control the flow of ice off the Sheet. Deep field near the Ellsworth Mountains British glaciologist, David Vaughan investigates the same thing to provide a comparison with the American work.And as they drill and dig and core down in Antarctica, in down town Chicago, Doug MacAyeal, prophet of the coast line's future, sits at his desk and processes. For all this field data, this expensive, exhaustive and detailed glaciology, only achieves its meaning when it becomes part of a computer model.The physics of the Ice Sheet - the sticky spots, lubrication, shear zones - are all being linked together to show what controls the movement of ice. And when the future is revealed by the computer it shows the stark possibility that the growth of the ice sheet creates the seeds of its own destruction.
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【技术参数】——
视频编码: Divx 6
比特率: ~1860 kb/s
Video 分辨率: 688x416 (1.65:1)
Video 画面比例: 16:9
音频编码: MP3
音频比特率: 128 kb/s (64/ch) CBR 48000 Hz
分集时长: 49m
分集数: 3
体积: 700mb
发布人： jvt40【Technical Specs】——
Video Codec: Divx 6
Video Bitrate: ~1860 kb/s
Video Resolution: 688x416 (1.65:1)
Video Aspect Ratio: 16:9
Audio Codec: MP3
Audio BitRate: 128 kb/s (64/ch) CBR 48000 Hz
RunTime Per Part: 49m
Number Of Parts: 3
Part Size: 700mb
Ripped by jvt40
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相关纪录片：
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Links
Release Post
MVGroup.org (ed2k)
MVGroup.org (torrent)
FileHeaven.org
Norsk EselForum.org
Official Website
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发表于 2020-7-13 23:24:20
发表于 2020-7-15 01:05:54