学生介绍天气的高中英语作文.doc

学生介绍天气的高中英语作文 介绍天气的作文不好写特别还是英语作文下面就是百分网小编给大家整理的学生介绍天气的英语作文希望大家喜欢 Theweatherisasetofallthephenomenainagivenatmosphereatagiventime.Italsoincludesinteractionswiththehydrosphere.Thetermusuallyreferstotheactivityofthesephenomenaovershortperiods(hoursordays),asopposedtothetermclimate,whichreferstotheaverageatmosphericconditionsoverlongerperiodsoftime.Whenusedwithoutqualification,weatherisunderstoodtobetheweatherofEarth. Weathermostoftenresultsfromtemperaturedifferencesfromoneplacetoanother.Onlargescales,temperaturedifferencesoccurbecauseareasclosertotheequatorreceivemoreenergyperunitareafromtheSunthandoregionsclosertothepoles.Onlocalscales,temperaturedifferencescanoccurbecausedifferentsurfaces(suchasoceans,forests,icesheets,ormanmadeobjects)havedifferingphysicalcharacteristicssuchasreflectivity,roughness,ormoisturecontent. Surfacetemperaturedifferencesinturncausepressuredifferences.Ahotsurfaceheatstheairaboveitandtheairexpands,loweringtheairpressure.Theresultinghorizontalpressuregradientacceleratestheairfromhightolowpressure,creatingwind,andEarthsrotationthencausescurvatureoftheflowviatheCorioliseffect.Thesimplesystemsthusformedcanthendisplayemergentbehaviourtoproducemoreplexsystemsandthusotherweatherphenomena.LargescaleexamplesincludetheHadleycellwhileasmallerscaleexamplewouldbecoastalbreezes. Thestrongtemperaturecontrastbetweenpolarandtropicalairgivesrisetothejetstream.Mostweathersystemsinthemidlatitudesarecausedbyinstabilitiesofthejetstreamflow(seebaroclinity).Weathersystemsinthetropicsarecausedbydifferentprocesses,suchasmonsoonsororganizedthunderstormsystems. BecausetheEarthsaxisistiltedrelativetoitsorbitalplane,sunlightisincidentatdifferentanglesatdifferenttimesoftheyear.InJunetheNorthernHemisphereistiltedtowardsthesun,soatanygivenNorthernHemispherelatitudesunlightfallsmoredirectlyonthatspotthaninDecember(seeEffectofsunangleonclimate).Thiseffectcausesseasons.Overthousandstohundredsofthousandsofyears,changesinEarthsorbitalparametersaffecttheamountanddistributionofsolarenergyreceivedbytheEarthandinfluencelongtermclimate(seeMilankovitchcycles). OnEarth,monweatherphenomenaincludesuchthingsaswind,cloud,rain,snow,fogandduststorms.Lemoneventsincludenaturaldisasterssuchastornadoes,hurricanesandicestorms.Almostallfamiliarweatherphenomenaoccurinthetroposphere(thelowerpartoftheatmosphere).Weatherdoesoccurinthestratosphereandcanaffectweatherlowerdowninthetroposphere,buttheexactmechanismsarepoorlyunderstood.1 Theatmosphereisachaoticsystem,sosmallchangestoonepartofthesystemcangrowtohavelargeeffectsonthesystemasawhole.Thismakesitdifficulttoaccuratelypredictweathermorethanafewdaysinadvance,thoughweatherforecastersarecontinuallyworkingtoextendthislimitthroughthescientificstudyofweather,meteorology.Itistheoreticallyimpossibletomakeusefuldaytodaypredictionsmorethanabouttwoweeksahead,imposinganupperlimittopotentialforimprovedpredictionskill.1Chaostheorysaysthattheslightestvariationinthemotionofthegroundcangrowwithtime.Thisideaissometimescalledthebutterflyeffect,fromtheideathatthemotionscausedbytheflappingwingsofabutterflyeventuallycouldproducemarkedchangesinthestateoftheatmosphere.Becauseofthissensitivitytosmallchangesitwillneverbepossibletomakeperfectforecasts,althoughtherestillismuchpotentialforimprovement. Thesunandoceanscanalsoaffecttheweatherofland.Ifthesunheatsupoceanwatersforaperiodoftime,watercanevaporate.Onceevaporatedintotheair,themoisturecanspreadthroughoutnearbyland,thusmakingitcooler. GoodeveningHeresthenextdayweatherreportforsomemaincitiesinGuangxi.Nanningissunny.Itishotwiththetemperaturefrom20to29.InGuilin,itstemperatureisarrangedfrom8to13.Itscoldinthemorningandatnight.peoleshouldwearmoreclothesincaseofcatchingcold.Liuzhouiscloudyinthedaytimeandhasastrongwindduringthenighttimewiththetemperaturefrom11to15.TherewillbebeautifulsunshineinWuzhou.Peoplewillfeelfortabletogooutasthetemperatureisfrom15to22.Thatstheweatherreportfortoday.Thankyouforlistening. 晚上好这是广西的一些主要城市第二天的天气预报南宁是晴天很热气温是20到29桂林的温度是8到13早上和晚上比较冷以防感冒人们应该多穿点衣服柳州白天多云晚上有强风温度是11到15梧州阳光灿烂温度是15到22人们外出会感觉到很舒适这是今天的天气报告谢谢您的倾听 LetstakealookattheweatherinShanxiProvinceforthenext24hours.Taiyuanwouldbecloudyatthetimewiththetemperaturefromeighteentotwentyeight.AstrongwindwouldreachDatong,whichcouldcausemuchrain,Thetemperaturewouldbesixteentotwentysix.Yangquanwouldbesunnywiththehighesttemperatureofthirtydegree.Linfenwouldbewindyanditstemperaturewouldbetwentythreetothirtytwo.WewouldhaveasunnyandhotdayinYuncheng.Itstemperaturewouldstaybetweentwentyeighttothirtyfour. GoodmorningHerestheweatherreportforsomebigcitiesintheworld.Beijingiscloudy.Itsverycold,sowearwarmclotheswhenyougoout.InHongKongtheresbeautifulsunshine.(阳光灿烂).Peoplewillfeelcoolinthedaytime.I