天气预报 Weather Forecast.ppt

《天气预报 Weather Forecast.ppt》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、WeatherForecastnina①Willyouneedyoursnowbootstomorrow?②Shouldyoubringanumbrella?③Doyouthinkweatherforecastisimportant?contentBeforereadingGlobalreadingDetailedreadingAfterreadingBeforereading1weathersymbol2newwords3competitionNewwordsandExpressionspredictionn.预言，预告harvestn.v.收成，收割schedulen.程序表，日程

2、安排observationn.观察patternn.图案，方式wisdomn.聪明，智慧delightn.高兴，愉快NewwordsandExpressionscombinationn.联合，合作，结合atmosphericadj.大气的，大气层的temperaturen.温度，气温formulan.公式，方程式datan.(datum的复数)资料，材料telltaleadj.显示真相的wispyadj.一小束的，一小缕的NewwordscompetitionGlobalreading1readingthearticle2workingtogether3listeningtoasong

3、WeatherForecastWillyouneedyoursnowbootstomorrow?Shouldyoubringanumbrella?Accurateweatherpredictionsareimportantforplanningourday-to-dayactivities.Farmersneedinformationtohelpthemplanfortheplantingandharvestingoftheircrops.Airlinesneedtoknowaboutlocalweatherconditionsinordertoscheduleflights.Weat

4、herforecastinghelpsustomakemoreinformeddailydecisions,andmayevenhelpkeepusoutofdanger.Forecastinghasalonghistory.Mostearlyforecastingwasbasedonobservationofweatherpatterns.Overtheyears,theobservationofweatherpatternshasresultedinfolkwisdomabouttheweather,agooddealofwhichisinaccurate,butsomeofwhi

5、chissupportedbyscience.You’veprobablyheardtheexpression,“Redskiesinmorning,sailorstakewarning;redskiesatnight,sailor’sdelight.”AredSuncanpresagerain,sinceitoccurswhentheairisfullofdustandwatervapor.Thoughtherhymeitselfmaynotbe100percentaccurate,theobservationisbasedonweatherpatterns.Modernweathe

6、rforecastinginvolvesacombinationofcomputermodels,observation,andknowledgeoftrendsandpatterns.Usingthesemethods,reasonablyaccurateforecastscanbemadeuptoaboutfivedaysinadvance.Beyondthat,detailedforecastsarelessuseful,sinceatmosphericconditionssuchastemperatureandwinddirectionareverycomplex.Mostof

7、thecomputermodelsusedforforecastingarerunbytheNationalWeatherService,whichcreatesforecastmodelsbasedoncomplexformulas.Thesemodelsareusedbymanydifferentweatherandnewsservicesinpreparingdailyforecasts.Localweatherobservers,bal