沙尘暴英语简介课件

1、A great disaster film2014 Annual masterpieceHeavy dust here! Bring your own tissue!Dust stormA great disaster film2014 AnnA dust storm is a meteorological phenomenon common in arid and semi-arid regions. Dust storms arise when a gust front or other strong wind blows loose sand and dirt from a dry su

2、rface. Particles are transported by saltation and suspension, a process that moves soil from one place and deposits it in another. A dust storm is a meteorologicStrong WindLoosely Dust & SandDrought or arid conditions, and varied wind causesOver-plowed, over-grazed landStrong WindLoosely Dust & San沙

3、尘暴英语简介课件Effects Environmental crisisEcosystem impactsProperty damageInjuries, and deaths.Land DesertificationAtmospheric EnvironmentEtc.Tremendous!Effects Environmental crisisMeasures Relieve pressure on pasture by captive breeding(圈养减轻草场压力）Reafforestation（退耕还林）Establish an efficient system of wind

4、prevention and sand fixation.（防风固沙）Conserve water and soil resources.（保持水土）Emphasize on prevention and control of desertification of farmland（防止和控制土地沙漠化）Complete more water conservancy infrastructure construction.(农田水利设施建设）Measures Relieve pressure on pHow to survive a dust storm?How to survive a du

5、st storm? a. Put a mask over your nose and mouthMethod 1 of 3: Surviving a Storm on Foot b.Protect your eyes c.Get to high ground(safe, solid, high point) d. Shield yourself from flying objects e.Wait out the stormMethod 1 of 3: Surviving a StoMethod 2 of 3: Surviving a Storm in a CarOutrun the stor

6、mPull the car over and stopTake cover and stay putMethod 2 of 3: Surviving a StoMethod 3 of 3: Thinking Ahead for Next TimeKnow where dust and sand storms occur.Heed（留心） dust storm warnings.Be prepared in case of an emergency :A mask designed to filter out small particulates Airtight goggles A water

7、 supply A warm blanketMethod 3 of 3: Thinking Ahead Dust Bowl(1930-1936)It fell across our cityLike a curtain of black rolled down,We thought it was our judgmentWe though it was our doom.The period began in 1931 when severe drought covered the mid-western and southern US plains. As the crops died, d

8、ust from the over-plowed and over-grazed land, whipped skyward by strong, dry winds, formed great dust storms that became known as black blizzards. In 1932, fourteen dust storms were reported in the US, but in the following year, the number jumped to 38.Dust Bowl(1930-1936)It fell aOne of the most p

9、owerful sandstorms in decades hit the Saudi Arabian capital Riyadh.One of the most powerful sandsSuburban Sydney, 6:20 am, 23 September. At dawn with the sun low in the sky, the color was a deep orange/brown. By 8:00 am the color was a less intense gold/brown hue(色调）.A man walks his dog through Obse

10、rvatory Hill near Sydney on September 23, 2009 as Australias biggest city is shrouded in an eerie blanket of red dust. Sydneys cars and buildings turned orange as strong winds blew desert dust across the city, snarling commuter and air transport and prompting a warning for children and the elderly to stay indoors.A dust storm blankets Sydneys iconic Opera House