glaciation

简明释义

英[ˌɡleɪsiˈeɪʃn]美[ˌɡleɪʃiˈeɪʃn]

n. [地质] 冰川作用；冻结成冰

英英释义

单词用法

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例句

1.Yet Rampino and others question one of the traditionalists' basic assumption: the periodic occurrence of glaciation throughout Earth's history.

然而，兰皮诺和其他人对传统主义者的一个基本假设提出了质疑：在整个地球历史中，冰川期是周期性发生的。

2.These changes alter the intensity of sunlight hitting the Earth at high latitudes, and so affect the extent of glaciation.

这些变化改变了高纬度区域的日照强度，由此影响了冰河作用的范围。

3.These hills were formed by glaciation.

这些山丘是冰川作用形成的。

4.Discovery of Paleo-glacier traces in the area support the argument of Pleistocene glaciation in eastern China.

连云港云台山古冰川遗迹的发现，为我国东部古冰川遗迹的研究，又增添了新的证据。

5.We now know the age of the glaciation accurately from radiometric dating of the carbon-14 in logs buried in the drift.

我们现在通过测量掩埋在漂流物中木头放射性的碳-14元素，以精确地确定冰川作用的时期。

6.The problem with ascribing all tillites to glaciation, however, is that tillite deposits are widespread in Precambrian sediments.

然而，使所有的黑土形成冰川作用的问题是，在前寒武纪沉积物中广泛分布有黑土。

7.Studies show that the formation of the ice bodies in the ice cave is related mainly to Quaternary glaciation.

初步研究表明，冰洞洞体的形成，主要与该区第四纪早期冰川作用有关。

8.The last major glaciation occurred approximately 20,000 years ago, when large parts of North America were covered in ice.

最后一次主要的冰川期发生在大约20000年前，当时北美的大部分地区被冰覆盖。

9.Scientists study glaciation to understand past climate changes and their effects on sea levels.

科学家研究冰川期以了解过去的气候变化及其对海平面的影响。

10.The evidence of glaciation can be seen in the form of U-shaped valleys and fjords.

冰川期的证据可以通过U型山谷和峡湾的形式看到。

11.During periods of glaciation, many species adapted to colder climates.

在冰川期期间，许多物种适应了寒冷的气候。

12.The study of glaciation helps us predict future climate scenarios.

对冰川期的研究帮助我们预测未来的气候情景。

作文

The phenomenon of glaciation (冰川作用) has profoundly shaped the Earth's landscape over millions of years. During periods of glaciation, vast ice sheets covered significant portions of the planet, altering ecosystems and influencing climate patterns. Understanding glaciation is crucial for geologists and climate scientists as it provides insights into past climate changes and helps predict future environmental shifts. One of the most notable examples of glaciation occurred during the last Ice Age, which peaked around 20,000 years ago. At that time, large areas of North America, Europe, and Asia were enveloped by thick ice. This immense weight of ice not only carved out valleys and fjords but also created unique geological features such as moraines and drumlins. These formations serve as evidence of the movement of glaciers and their impact on the terrain. The process of glaciation begins when temperatures drop significantly, leading to the accumulation of snow and ice. As layers of snow build up, they compress into dense ice, forming glaciers. These glaciers slowly flow under their own weight, reshaping the land beneath them. The rate of glaciation can vary depending on climatic conditions, with colder periods leading to extensive ice coverage and warmer periods resulting in melting and retreating glaciers. In addition to its physical impact on the landscape, glaciation also plays a critical role in regulating the Earth's climate. Ice reflects sunlight, which helps to keep the planet cool. However, as global temperatures rise due to human activities, glaciers are melting at an alarming rate. This not only contributes to rising sea levels but also disrupts local ecosystems that depend on glacial meltwater. The study of glaciation extends beyond just understanding past climates; it also informs us about the potential consequences of current climate change. By examining sediment cores and ice cores, scientists can gather data on historical temperature fluctuations and atmospheric composition. This information is invaluable for predicting how modern glaciation patterns might evolve in response to ongoing global warming. Moreover, the implications of glaciation are felt in various aspects of society. Communities that rely on glacial meltwater for agriculture and drinking water face challenges as glaciers recede. Additionally, the loss of glaciers impacts tourism in regions where they are a major attraction. As these natural wonders disappear, so too does the economic benefit they provide. In conclusion, glaciation (冰川作用) is a fundamental process that has shaped our planet's geology and climate. Its effects are evident in the landscapes we see today and in the changing climate we are experiencing. As we continue to study glaciation, we gain valuable knowledge that can help us address the challenges posed by climate change and work toward a sustainable future. Understanding the past is essential for navigating the complexities of our present and future environmental realities.