Weather Map A weather map is an important tool for geographers. A succession of three of four maps presents a continuous picture of weather changes. Weather forecasts are able to determine the speed of air masses and fronts; to determine whether an individual pressure area is deepening or becoming shallow and whether a front is increasing or decreasing in intensity. They are also able to determine whether an air mass is retaining its original characteristics or taking on those of the surface over which it is moving. Thus, a most significant function of the map is to reveal a synoptic picture of conditions in the atmosphere at a given time. All students of geography should be able to interpret a weather map accurately. Weather maps contain an enormous amount of information about weather conditions existing at the time of observation over a large geographical area. They reveal in a few minutes what otherwise would take hours to describe. The United States weather Bureau issues information about approaching storms, floods, frosts, droughts, and all climatic conditions in general. Twice a month it issues a 30-day outlook which is a rough guide to weather conditions likely to occur over broad areas of the United States. These 30-day outlooks are based upon an analysis of the upper air levels with often set the stage for the development of air masses, fronts, and storms. Considerable effort is being exerted today to achieve more accurate weather predictions. With the use of electronic instruments and earth satellites, enormous gains have taken place recently in identifying and tracking storms over regions which have but few meteorological stations. Extensive experiments are also in progress for weather modification studies. But the limitations of weather modification have prevented meteorological results except in the seeding of super-cooled, upslope mountainous winds which have produced additional orographical precipitation on the windward side of mountain ranges. Nevertheless, they have provided a clearer understanding of the fundamentals of weather elements. 1 One characteristic of weather maps not mentioned by the author in this passage is . A wind speed B thermal changes C fronts D barometric pressure 2 The thirty-day forecast is determined by examining . A upper air levels B satellite reports C changing fronts D daily air maps 3 The observation of weather conditions by satellites is advantageous because it . A gives the scientist information not obtained readily otherwise B enables man to alter the weather C uses electronic instruments D is modern 4 A weather map is synoptic because it . A summarizes a great deal of information B can be interpreted accurately C appears daily D shows changing fronts 5 At the present time, experiments are being conducted in . A 30-day outlook B controlling storms C satellites D manipulating weather 参考答案 1. B2. A3. D4. A5. D
上一篇: 职称英语综合类的阅读理解练习(18)
下一篇: 职称英语综合类的阅读理解练习(17)
国内英语资讯:Southern Chinese cities conduct large-scale COVID-19 testing after new case reported
国际英语资讯:Afghan govt releases 80 Taliban prisoners: official
国际英语资讯:Syrian forces shell rebel-held areas in Idlib, Aleppo: monitor
国内英语资讯:Chinas Yangtze River sees fourth flood of the year
陪女儿考研的妈妈考上博士!那些重返校园的中年人太励志
《习近平谈治国理政》第三卷重要概念汉英对照(三)
国内英语资讯:China steps up flood control in Yangtze River
小闹钟
World No-Tobacco Day 世界无烟日
世卫组织:新冠病毒不会通过食品和包装传播
美国“Karen”梗火了……网上人人喊打,这究竟是个什么人设?
欧洲疫情卷土重来 年轻人成感染“主力军”
国际英语资讯:Pakistan has defeated terrorism, extremism, says president
国内英语资讯:China probes polyphenylene ether imports from U.S.
国内英语资讯:U.S. trilateral negotiations subvert intl consensus on nuclear disarmament: Chinese envoy
国际英语资讯:Mexico, U.S. extend partial border closure until Sept. 21 due to COVID-19
国际英语资讯:Chinese Embassy in Poland opposes Pompeos erroneous claims on China
国际英语资讯:Poland, U.S. sign military agreement
国内英语资讯:Across China: Small tea leaves help realize big dreams in east China
意大利再度启用17世纪防疫“酒窗”
国际英语资讯:New Zealand election to be delayed to Oct. 17 due to COVID-19
国际英语资讯:Putin, Lukashenko discuss situation in Belarus
每日一词∣交通领域新基建 new infrastructure construction in the transport sector
卫健委、教育部:秋季开学后中小学生应随身备用口罩
国内英语资讯:China solicits public opinion on 14th five-year plan
国际英语资讯:News Analysis: Palestinians concern about crack in Arab position towards their cause after U
国内英语资讯:China welcomes Putins proposal of holding online summit over Iranian nuclear issue
做冰沙
国际英语资讯:Somali leader to join regional state leaders for talks on security, polls
全球数百人因新冠错误信息死亡