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
2023-09-01
76
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] All the following characteristics of weather maps are mentioned in this passage EXCEPT ______.
选项
A、barometric pressure
B、fronts
C、thermal changes
D、wind speed
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2977007.html
相关试题推荐
Manyofthemostdamagingandlifethreateningtypesofweathertorrentialr
SomehistorianssaythatthemostimportantcontributionofDwightEisenhowe
【B1】______[br]【B11】______[originaltext]OneofAmerica’smostimportant(26
【B1】______[br]【B8】______[originaltext]OneofAmerica’smostimportant(26)
【B1】______[br]【B4】______[originaltext]OneofAmerica’smostimportant(26)
Agricultureisundoubtedlythemostimportantsectorintheeconomiesofm
Agricultureisundoubtedlythemostimportantsectorintheeconomiesofm
Agricultureisundoubtedlythemostimportantsectorintheeconomiesofm
Agricultureisundoubtedlythemostimportantsectorintheeconomiesofm
Agricultureisundoubtedlythemostimportantsectorintheeconomiesofm
随机试题
ReadthearticlebelowaboutJapan’slostgeneration.Foreachquestion31-40wr
Howeverlateitis,heneverputsoffwhatmustbedonetodayfilltomorrow.A、无论
Whatistheconcernofordinarypeopleaboutthe"GreenhouseEffect"?[br][or
阅读《陌上桑》中的一段诗句,回答下列问题: 使君从南来,五马立踟蹰。使君遣吏往
松果体区最常见的肿瘤是A.松果体细胞瘤 B.松果体母细胞瘤 C.生殖细胞瘤
变电站的接地网不得作为()地线使用。电动机$;$发电机$;$电焊机$;$电转
下列不动产登记情形中,只收取不动产权属证书每本证书10元工本费的有( )。A.单
中商华联贸易有限公司(海关注册编码1102918123)代理湖南长沙家佳纺织有
进行大型基本建设工程,()应当事先报请省、自治区、直辖市人民政府文物行政部门组织
最新回复
(
0
)