首页
登录
职称英语
A weather map is an important tool for geographers. A succession of three or
A weather map is an important tool for geographers. A succession of three or
游客
2024-05-11
39
管理
问题
A weather map is an important tool for geographers. A succession of three or four maps presents a continuous picture of weather changes. Weather forecasters are able to determine the speed of air masses and fronts; to deter mine 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 which 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 modification have prevented meteorological results except in the seeding of super-cooled, upslope mountainous winds which have produced ad ditional orographic (山岳形态的) precipitation (山岳雨) on the windward side of mountain ranges. Nevertheless, they have provided a clearer under standing of the fundamentals of weather elements. [br] The thirty-day forecast is determined by examining ______.
选项
A、daily weather maps
B、upper air levels
C、satellite reports
D、changing fronts
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3593274.html
相关试题推荐
Aweathermapisanimportanttoolforgeographers.Asuccessionofthreeor
Aweathermapisanimportanttoolforgeographers.Asuccessionofthreeor
Aweathermapisanimportanttoolforgeographers.Asuccessionofthreeor
[originaltext]Breakfastplaysanimportantpartinourdallylife,anditsu
[originaltext]Breakfastplaysanimportantpartinourdallylife,anditsu
[originaltext]Currentstudiesshowthatwhatgoesonlabelsisanimportant
WhatIsMoreImportant:CharacterorAcademicAchievement?1.不少人认为考试成绩是评价学生的标准2
TheMostImportantSkillsforModernPeople1.随着科技的发展.现代人的技能也随之变化2.有人认为外语、计算机等技
[originaltext]Memory,Ithink,isalmostasimportantasair,waterorsuns
WheneverIhearaweatherreportdeclaringit’sthehottestJune10onrecor
随机试题
[originaltext]Haveyoutriedrecycling?Sometimesrecyclingcaninvolveputting
AWorkaholicEconomyForthefirstcenturyorsoofth
先秦诸子散文中,最富有浪漫色彩的是( )A.《论语》 B.《孟子》 C.《
纳税人取得经营所得,按年计算个人所得税,由纳税人在月度或者季度终了后十五日内向税
对工厂职工目前的健康状况进行的调查属于()A.横断面调查 B.病例一对照调
房地产广告的内容( )。A.不得涉及文化教育设施 B.不得涉及物业服务内容
A.低血糖 B.高血糖 C.酮症酸中毒 D.慢性并发症 E.感染方女士患
下列关于态度与品德关系的论述,错误的是()。 A.二者实质相同 B.二者结构
下列有关法律作用、法律观念等问题的表述哪些是正确的?()A、“法典是人民自由的圣
耐压、抗破裂性能好、质量轻,具有一定的弹性、耐温性能好、防紫外线、抗热老化能力强
最新回复
(
0
)