downbursts

简明释义

英[ˈdaʊnˌbɜːst]美[ˈdaʊnˌbərst]

n. [气象] 下击暴流；下爆流

英英释义

单词用法

同义词

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例句

1.Doppler radar plays important roles on monitoring and predicting downbursts for its high temporal and spatial resolution.

多普勒天气雷达以其高时空分辨率成为监测和预警下击暴流的有力工具。

2.Doppler radar plays important roles on monitoring and predicting downbursts for its high temporal and spatial resolution.

多普勒天气雷达以其高时空分辨率成为监测和预警下击暴流的有力工具。

3.The meteorologist warned that the storm could produce severe downbursts (下击暴流) that might damage buildings.

气象学家警告说，风暴可能产生严重的downbursts（下击暴流），可能会损坏建筑。

4.Pilots need to be cautious of downbursts (下击暴流) when landing during thunderstorms.

飞行员在雷暴期间降落时需要对downbursts（下击暴流）保持警惕。

5.The sudden gust of wind was a clear indication of downbursts (下击暴流) occurring nearby.

突如其来的阵风清楚地表明附近发生了downbursts（下击暴流）。

6.Meteorological studies show that downbursts (下击暴流) can occur in both warm and cold weather.

气象研究表明，downbursts（下击暴流）可以在温暖和寒冷的天气中发生。

7.After the storm passed, we saw evidence of downbursts (下击暴流) in the uprooted trees.

暴风雨过后，我们看到被连根拔起的树木是downbursts（下击暴流）造成的证据。

作文

Weather phenomena can be both beautiful and destructive, and one of the most fascinating yet dangerous occurrences in meteorology is the phenomenon known as downbursts. A downburst is a powerful downward air current that can cause significant damage when it reaches the ground. These events are often associated with severe thunderstorms and can result in strong winds that spread out horizontally upon hitting the surface. Understanding downbursts is crucial for meteorologists, pilots, and anyone living in areas prone to severe weather. The formation of a downburst typically begins when a thunderstorm releases rain. As the rain falls through the warmer air below, it evaporates, cooling the surrounding air. This cooler air becomes denser than the surrounding atmosphere and starts to descend rapidly. When this descending air hits the ground, it spreads out in all directions, creating what is known as a microburst if the area affected is small or a macroburst if it covers a larger area. The winds generated by a downburst can exceed 100 miles per hour, making them extremely hazardous. One of the most significant dangers posed by downbursts is their potential to cause damage similar to that of tornadoes. Buildings can suffer structural damage, trees can be uprooted, and vehicles can be overturned. For pilots, downbursts present a serious risk during takeoff and landing. Sudden changes in wind direction and speed can lead to loss of control of an aircraft, which is why understanding these phenomena is critical for aviation safety. In addition to their destructive capabilities, downbursts also have a unique visual signature. When a downburst occurs, it often creates a visible outflow boundary, which is a line of demarcation where the cool air from the downburst meets the warm air ahead of the storm. This boundary can enhance the development of new thunderstorms, leading to a cycle of severe weather that can persist for hours. To mitigate the risks associated with downbursts, meteorologists use advanced radar systems to detect signs of severe weather. Doppler radar, for instance, can identify strong wind patterns indicative of a downburst. Early warning systems have been developed to alert communities and aviation authorities about impending storms that may produce downbursts. In conclusion, downbursts are a remarkable yet dangerous weather phenomenon that requires careful study and understanding. By recognizing the signs of a downburst and implementing effective warning systems, we can better protect lives and property from the destructive forces of nature. As climate change continues to affect weather patterns globally, it is essential to remain vigilant and informed about the potential for severe weather events, including downbursts. In summary, a downburst (下击暴流) is a meteorological event characterized by a sudden and intense downward movement of air, often resulting in damaging winds and severe weather conditions. Awareness and preparedness are key to minimizing the impact of these powerful phenomena on our lives.

天气现象既美丽又具有破坏性，而气象学中最迷人但又危险的现象之一就是被称为下击暴流的现象。下击暴流是指一种强大的向下气流，当它到达地面时可能造成重大损害。这些事件通常与严重的雷暴有关，并且可以导致强风在撞击表面后水平扩散。理解下击暴流对气象学家、飞行员以及生活在易受严重天气影响地区的人们至关重要。 下击暴流的形成通常始于雷暴释放雨水。当雨水穿过下面的温暖空气下降时，它会蒸发，冷却周围的空气。这种较冷的空气变得比周围大气更密，开始迅速下降。当这种下降的空气撞击地面时，它会向各个方向扩散，创建一个微暴（microburst）如果受影响区域较小，或者宏暴（macroburst）如果覆盖面积较大。由下击暴流产生的风速可以超过每小时100英里，这使得它们极具危险性。 下击暴流带来的一个主要危险是它们可能造成类似于龙卷风的破坏。建筑物可能遭受结构损坏，树木可能被连根拔起，车辆可能被翻倒。对于飞行员来说，下击暴流在起飞和降落过程中构成严重风险。风速和方向的突然变化可能导致飞机失去控制，这就是为什么理解这些现象对航空安全至关重要。 除了其破坏能力外，下击暴流还有独特的视觉特征。当下击暴流发生时，通常会产生可见的外流边界，这是冷空气来自下击暴流与风暴前方的暖空气相遇的分界线。这个边界可以增强新雷暴的发展，导致持续数小时的严重天气循环。 为了减轻与下击暴流相关的风险，气象学家使用先进的雷达系统来检测严重天气的迹象。例如，多普勒雷达可以识别强风模式，这些模式表明即将发生下击暴流。已经开发了早期预警系统，以警告社区和航空当局即将产生可能生成下击暴流的风暴。 总之，下击暴流是一种显著而危险的天气现象，需要仔细研究和理解。通过识别下击暴流的迹象并实施有效的预警系统，我们可以更好地保护生命和财产免受自然的破坏性力量。随着气候变化继续影响全球天气模式，保持警惕并了解包括下击暴流在内的严重天气事件的潜在性至关重要。 总结来说，下击暴流（下击暴流）是一种气象事件，特点是空气的突然和强烈的向下运动，通常导致破坏性风和严重的天气条件。意识和准备是减少这些强大现象对我们生活影响的关键。