60秒科学:Ocean Noise Clue to Climate Change
Seismologists spend a lot of time listening to the earth. Ocean acoustic 1 monitors have been providing information on the earth’s vibrations 2 since the 1930’s. But there are other sounds those monitors pick up as well, for instance those of waves and choppy waters. These sounds are usually considered just noise and are filtered out of the equation.
But researchers now realize that paying attention to what was previously 3 considered noise can help monitor global climate change. That’s according to a study in a recent issue of the journal Science.
In shallow coastal 4 waters, the breaking waves directly hit the ground and cause vibrations. In deeper waters, waves traveling in nearly opposite directions create a pulse that travels all the way to the ocean floor and causes new vibrations that can travel long distances.
Measured at 30-second intervals 5, these are called microseisms. They’re unique and not detectable 6 on land. And they can help us understand more about the frequency, intensity 7 and duration of storms.
An 80-year archive of acoustic information already exists. The length, stability and regularity 8 give these data a leg up over a sometimes spotty historical scientific climate record. Another tool to understand more about our changing climate.
—Cynthia Graber
- The hall has a fine acoustic.这个大厅的传音效果很好。
- Animals use a whole rang of acoustic, visual,and chemical signals in their systems of communication.动物利用各种各样的听觉、视觉和化学信号来进行交流。
- We could feel the vibrations from the trucks passing outside. 我们可以感到外面卡车经过时的颤动。
- I am drawn to that girl; I get good vibrations from her. 我被那女孩吸引住了，她使我产生良好的感觉。 来自《简明英汉词典》
- The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
- Let me digress for a moment and explain what had happened previously.让我岔开一会儿，解释原先发生了什么。
- The ocean waves are slowly eating away the coastal rocks.大海的波浪慢慢地侵蚀着岸边的岩石。
- This country will fortify the coastal areas.该国将加强沿海地区的防御。
- The forecast said there would be sunny intervals and showers. 预报间晴，有阵雨。
- Meetings take place at fortnightly intervals. 每两周开一次会。
- The noise is barely detectable by the human ear.人的耳朵几乎是察觉不到这种噪音的。
- The inflection point at this PH is barely detectable.在此PH值下，拐点不易发现。
- I didn't realize the intensity of people's feelings on this issue.我没有意识到这一问题能引起群情激奋。
- The strike is growing in intensity.罢工日益加剧。
- The idea is to maintain the regularity of the heartbeat.问题就是要维持心跳的规律性。
- He exercised with a regularity that amazed us.他锻炼的规律程度令我们非常惊讶。