近日来,随着温室效应的加剧,地球两极的温度也在逐年升高,下面这篇雅思阅读材料就是关于全球变暖以及温室效应这个环境问题的,是非常不错的雅思阅读材料。下面是详细内容,供大家参考,希望给大家带来帮助。
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A Canary in the Coal Mine
The Arctic seems to be getting warmer. So what?
A. Climate change in the Arctic is a reality now! So insists Robert Corell, an oceanographer with the American Meteorological Society. Wild-eyed proclamations are all too common when it comes to global warming, but in this case his assertion seems well founded.
B. At first sight, the ACIAs reports conclusions are not so surprising. After all, scientists have long suspected that several factors lead to greater temperature swings at the poles than elsewhere on the planet. One is albedo the posh scientific name for how much sunlight is absorbed by a planets surface, and how much is reflected. Most of the Polar Regions are covered in snow and ice, which are much more reflective than soil or ocean. If that snow melts, the exposure of dark earth acts as a feedback loop that accelerates warming. A second factor that makes the poles special is that the atmosphere is thinner there than at the equator, and so less energy is required to warm it up. A third factor is that less solar energy is lost in evaporation at the frigid poles than in the steamy tropics.
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