剑21流程图小作文新题“雨影沙漠形成过程”高分范文

你好呀，欢迎收听：英语考试Cat 🐱🐱🐱🐱

我是来自加拿大的雅思外教Mac。今天，和你分享剑21流程图小作文雨影沙漠形成过程”的原创范文。

题目：

The diagram below shows how one type of desert, known as a rain-shadow desert, is formed. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram illustrates the process by which rain-shadow deserts are formed as moist air travels inland across a mountain range.

Overall, the formation of a rain-shadow desert is a seven-stage natural process that begins with moist winds blowing inland from the sea and ends with dry air descending on the opposite side of the mountains, creating arid conditions where little or no rainfall occurs.

Initially, winds approach the coastline from over the sea before being forced upwards as they encounter a mountain range. As this moist air rises along the windward side of the mountains, it gradually cools, causing clouds to develop. Continued cooling eventually results in precipitation, with rain falling over the higher elevations of the windward slope. Consequently, much of the moisture carried by the air mass is released before it crosses the mountain peak.

After passing over the summit, the resulting considerably drier air continues its movement down the leeward side of the mountains. As it descends towards lower altitudes, no further cloud formation or rainfall occurs since the air has already lost most of its moisture. These dry winds then continue across the inland region, where the persistent lack of precipitation produces an extensive rain-shadow desert that may extend for thousands of kilometres beyond the mountain range.

该流程图展示了湿润气流翻越山脉向内陆移动时，雨影沙漠形成的全过程。

总体而言，雨影沙漠的形成分为七个自然阶段：始于海洋湿润气流向内陆吹拂，最终干燥气流从山脉另一侧下沉，造就干旱环境，该区域降水稀少甚至无降水。

起初，海面气流吹向海岸，遇到山脉后被迫抬升。湿润空气沿着山脉迎风坡上升，温度逐步降低，进而形成云层。持续降温最终引发降水，雨水落在迎风坡的高地。因此，气团携带的大部分水汽在翻越山顶前就已释放殆尽。

气流越过山顶后，变得十分干燥，沿着山脉背风坡持续下沉。在向低海拔区域下沉的过程中，空气已流失大部分水汽，无法再形成云层与降雨。干燥气流继续向内陆蔓延，长期少雨的环境造就了广阔的雨影沙漠，这片沙漠可延伸至山脉后方数千公里处。

加拿大Mac老师的一对一雅思课

400 元/小时。包括：

课前测评
线上实时课程
配套资料
作业批改
录播内容
全程一对一答疑指导

帮助大家少走弯路，更快、更稳拿到目标分数。

往期学生评价。