Name: 北大研究顯示北極熊處於薄冰上 (BYU Studies Show Polar Bears on Thin Ice)
Uploaded: 2021-01-14T05:14:31.000Z
Duration: 2 min 44 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

Climate change is the biggest problem facing polar bears, and as sea ice has diminished

程度副詞

over the last three decades we’re seeing a very marked response in polar bear populations.

轉承詞

Bears are suffering because of loss of sea ice. The study that I’m doing out of BYU

is looking at the potential interaction of bears and people. I go up to Alaska in the

wintertime and monitor maternal polar bear dens. When you’re dealing with a white animal

in a white landscape buried inside of a cave you have an obvious problem of finding these

animals. When we first start out we go up there and we find the dens with forward-looking

infrared. There she is. I can see her moving. Do you see the two ears and the nose looking

at us, you can see her. . . There she is. She’s looking out. And we go and we set

up these kind of self-contained camera units and they just film the bears 24/7. At their

den sites some of them have a meter of snow over them. They’re so powerful they just

arch against the roof and they’ll shove a meter-thick block of snow up in the air.

You’ll see it come up and then it will tip over and their head comes out like a periscope

on a submarine. When they first come out the mothers will, they rub all around on their

back like a dog and they wriggle and they’re cleaning their fur on the snow, and the little

cubs will roly poly play around on the ground. The mothers just sit there and scan the terrain.

There’s a couple of times where they’ve noticed our cameras. This past year we had

one where they just kind of came up and sniffed it and we got a nice closeup of the cub’s

face. When the bears abandon the den we’ll crawl in and take measurements and just kind

of see, you know, what a polar bear den is and it gives us a better idea of what they’re

doing in there. To the folks back home what’s a bear den like? It’s got an odor to it.

Ugh. That's the first noticeable thing? Yeah. We’ve got some good scratch marks back here.

Well the benefit of this kind of long-term, ongoing study is we can see how their behavior

changes over time as the sea ice changes. We see bears moving off of sea ice, coming

on to terrestrial areas in order to have their cubs, and so now we have more humans than

ever, more bears than ever all jammed in the same zone. So we’re kind of in there trying

to sort it out to let them have their lives as undisturbed as possible. I go up and speak

on behalf of Polar Bear International. Nobody’s predicting that they’ll go extinct. What

they are saying is that their overall numbers will be diminished. Sea ice has a physical

relationship with the planet’s temperature and if we can reduce CO2 we’ll see a corresponding

response in the sea ice. There’s no question that we can do things to lessen our individual

impact on the planet. Whether polar bears are at stake or not this has always been good