首页
登录
职称英语
Write ONE WORD ONLY for each answer. Name TWO elements which produce wea
Write ONE WORD ONLY for each answer. Name TWO elements which produce wea
游客
2024-01-07
55
管理
问题
Write ONE WORD ONLY for each answer.
Name TWO elements which produce weather:
(31)
(32) [br]
Good morning. It’s good to see so many of you taking an interest in meteorology. As you are all newcomers to the topic, let’s keep it simple to start with. ha fact, let’s begin with a very simple definition of what meteorology is—the suffix ’ -logy ’ gives you a clue—at least you can all guess that it is’ the study of ’...something. Meteorology is in fact the scientific study of all changes in the atmosphere—essential for forecasting the weather, of course. And you all know what weather is, right? The four main ingredients are...the sun, the atmosphere, water vapor and the wind. They all come together, disseminating heat from the sun around the globe and making clouds in the layer of the atmosphere directly above the ground which is called the troposphere. Look up into the sky and on almost any day of the year you’ll see clouds.
Clouds form when water that has evaporated from the surface of the Earth condenses onto microscopic dust particles (or other particles ) floating in the air. Cloud formation takes different shapes and they mostly get their names from Latin roots. Now, let’s look at the five most basic. We’ll start with Cumulus which is a low cloud with a white, puffy appearance and most often composed of water droplets. It gets its name from ’ cumuli’ meaning ’ heap’ for its typical ’piled-up’ appearance.
Now, let’s move on to Stratus (from ’ strata’ meaning ’ layer’ )—these are the grey, horizontal ones (often with a fiat base) that you see on an overcast day and they too are mostly made up of water droplets. At this point, I should mention Fog, which you probably don’t even think of as clouds, but fog consists of very low stratus—ground-hugging clouds. The high altitude Cirrus cloud, on the other hand is mostly made of ice crystals and appears wispy and thin—almost hair-like—in fact, that’s where they get their name...from the word ’cirri’ meaning ’wisp of hair’. They are generally fair-weather clouds.
Not so the Cumulonimbus—the tallest of all clouds—they extend way up into the troposphere and these are the ones that produce lightning, thunder, heavy rain, strong winds and tornadoes. Beware the Cumulonimbus! You already know what cumuli means and it won’t surprise you to find out that ’nimbus’ means ’rain’ and, added as a suffix, is an indication of the cloud’s ability to produce precipitation which could be rain, snow or hailstones.
As this course progresses, you’ll learn a lot more about cloud types but before I finish today, I want to go back to something I mentioned before—dust. It is generally accepted that when water vapor ascends in the process of cloud formation it condenses onto dust particles. So, it was assumed, large dust particles would produce larger droplets and enhance the formation of rain. However, recent research has shown the opposite to be true. Droplet size increases the farther the clouds are from dust-filled air. More dust reaching rain clouds produces less rainfall. Scientists have shown that as more and more dust enters a rain cloud, the same amount of water becomes spread out. The resulting smaller water droplets scatter instead of combining and growing large enough to make up raindrops.
This study shows that higher dust frequency is not inevitably the result of diminished rainfall but rather its cause! Therefore, loss of topsoil from over-grazing, over-cultivation or bad livestock management in areas neighboring desert will contribute to the continuing expansion of those arid regions.
Your assignment for this week will be to read up on this research and write a report on how dust from damaged land may exacerbate drought conditions and lead to further desertification of arid areas. In other words, how land use has an impact on climate change.
选项
答案
sun, atmosphere/troposphere, vapour, wind
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3341088.html
相关试题推荐
Thediagramillustrateshowpaperisproducedandhowusedpapercanberecyc
Thepiechartsbelowshowwherecoffeeisproduced,consumedworldwide,and
ChooseONEORTWOWORDSfromReadingPassage3foreachanswer.Writeyouranswe
Completethenotesbelow.ChooseONEWORDfromthepassageforeachanswer.Writ
Completethenotesbelow.ChooseONEWORDfromthepassageforeachanswer.Writ
Completethenotesbelow.ChooseONEWORDfromthepassageforeachanswer.Writ
Completethenotesbelow.ChooseONEWORDfromthepassageforeachanswer.Writ
Completethenotesbelow.ChooseONEWORDfromthepassageforeachanswer.Writ
Completethenotesbelow.ChooseONEWORDONLYfromthepassageforeachanswer.
Completethenotesbelow.ChooseONEWORDONLYfromthepassageforeachanswer.
随机试题
Cultureisactivityofthought,andreceptivenesstobeautyandhumanefeeli
WilliamShakespeare(1564-1616)wrotemanyplaysandpoemswhichareknown
Directions:Forthispart,youareallowed30minutestowriteashortessayent
下列关于子宫下段的叙述中哪项不正确A.子宫下段系子宫峡部形成,非孕时长1cm
A.先天性甲状腺功能减退 B.苯丙酮尿症 C.两者均有 D.两者均无惊厥见
男,40岁,持续发热、右下胸胀痛1个月,体温37~39℃,盗汗、消瘦,2天前突起
测定上、下腔静脉或右心房内的压力,评估血容量的指标是<P>A.CVP<br>B.
不属于借助中介法招聘的是( )A.人才交流中心 B.猎头公司 C.校园招聘
发行人应披露的行业风险不包括()。A:产业政策 B:行业技术特点 C:行业
某企业从南非进口一批板材(检验检疫类别为M.P/Q),集装箱装运。货物入境时应对
最新回复
(
0
)