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DAY 9
Passage 1- Using Satellites to Spot Industry's methane Leaks: To Help Combat Climate Change
the main idea of this passage is to discuss the role of satellites to address industry's methane leaks, which is harmful to accelerate global warming.
The satellite Claire came across the mathane leaks from industry, warning the industris to stop leaking;
Why methane is a risky agent—it's a heat-trapping agent, playing an important role in causing global warming;
DJ studied images from the satellite to discuss the scale of this mathane leak, and found that this leak was the largest one compare to others.Why methane can be detected: it absorbs light, satellite is able to analyse light from it.
Satellite Claire is skilled at specting, and other satellite similar to Claire will come soon. People regard these satellites as a more reliable tool.
Having a number of complementary eyes-in-the sky will be an important way to reduce methane emission.
On top of that, for firms seeking to burnish their green credentials, plugging leaks is one of the most effective things they can do to help combat climate change.
come across偶遇;methane沼气;spectroscopically分光镜;credentials证书;
阅读时间:6'24
整理时间:16'32
总时间:22'56
Passage 2-Radiocarbon Dating by Accelerator Mass Spectrometry
The main idea of this passage is to discuss the use of radiocarbon dating by accelerator mass spectrometry
Acclerator mass spectrometry is more effective than the convetional one to detect the odler organic perservation accurately;
In convetional way, minor contamination would make severe skew measurements; however, strigent producers result in relativly small samples;
Minor imrpvements in radiocarbon accelerator can lead to sharper and more extensive chronogies, for example:
- the accelerator changed a long standing view of the age of a bone by using the only amino acides from the bone
- a long hold view of the first human migration to the New World was refuted by the accelerator
Acclerator dating plays an invaluable role in the chronological filed.
Accelerator mass spectrometry can push the threshold further back in time;
map out在地图上标出,筹划; threshold门槛;skew偏离;stringent严格的; unduly过度地;
阅读时间:5‘43
整理时间:15'26
总时间:21'09
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