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Bedrock. so we have an ice core that extends back 140,000 years. and so 140,000 years? yes. 140,000. so we re actually standing on two miles worth of ice below us. and we can use the ice cores like you would use tree rings, to get an idea of what past conditions of climate were like. and we can use what happened in the past to try to predict what s going to happen in the future. reporter: but summit s hefty price tag has made it a possible target for proposed budget cuts. the trump administration wants to slash funding to the national science foundation, and many fear that summit could be the first casualty. i think that s the politics of short-term gain, long-term environmental pain. reporter: box says he is frustrated by the white house s lack of commitment to climate change studies and its decision to withdraw from the paris accord. some people will say, listen, look back over the history of the planet. ....
Expense. it doesn t get much more remote than this. and with the high altitude, the science that is being done here at summit station requires enormous resources and sheer physical effort. but this place is uniquely positioned to answer a crucial question. has the arctic reached a tipping point? engineer zoe korville explains that its isolation is, in fact, its greatest asset. it s a very pristine site. and it s free from local influences of pollution. reporter: do you think summit is important to the study of climate change, specifically? we ve been making measurements since 1980 here, but we ve also drilled to bedrock. so we have an ice core that extends back 140,000 years 140,000 years? yes. 140,000 so we re actually standing on two miles worth of ice below us. ....
Antarctica. here s the story. sea levels are rising around the world. current thinking is part of that sea level rise comes from melting ice in antarctica. one recent study from nasa scientists says that may not be the case. antarctica is a big place, roughly the size of the u.s. and mexico combined. so as you might expect, changes in its ice are not uniform across the entire continent. nearly all scientists agree that ice is being lost from the western part of antarctica and along its peninsula. on the eastern side, ice is actually being gained. but where the study is different is they measured that that gaining of ice along eastern antarctica is outpacing the loss on the western side. what s behind this addition of ice is snow falls that started becoming heavier around 10,000 years ago. the scientists know in by looking into ice core data. ....
From ice core samples. as you take a look at the maps, a unique perspective across the planet. one of the more spectacular meteor showers taking place. we re talking about being able to see on the order of 15 to 30 meteors per hour. they re streaking across at about 130 miles per hour. if you have an opportunity to get outside, the clear parts of the united states, you can see this. and we ll leave you with this. an update on hurricane patricia. it s sitting off a popular beach destination in mexico. it could be a category two as it make land fall friday morning and afternoon. something we re watching with a strengthening storm system here. all right. a weekend ahead for that region. thank you. the pollution causing climate ....
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