GMAT研究生管理考试

首页>GMAT>导航 > 历年真题

GMAT机经:1月16日GMAT阅读机经

2013-1-21 16:35:00 无忧考网

无忧考网为大家整理了GMAT机经:1月16日GMAT阅读机经,仅供参考!!

 1月4日GMAT机经已换,现在为大家整理的最新的1月GMAT阅读机经,这一篇是风暴之眼的文章,分享给大家,希望对大家有所帮助,文中观点仅供参考。
  P1:过去对hurricane风速的研究使用的方法只能测量flight level的风速,然后科学家开始用dropwindsondes,从飞机上GPS的小球可以测量出相对ground level的风速,然后说整个风暴max是发生在多少多少,然后storm eye的风力(这里涉及到两部分风速的测量,near the eye&out of the eye)本月给的是测量eye surface(台风眼的外圈风力)和outer reach surface(台风最外圈的风力),对于eye surface(near the eye)max通常发生在一个某某高度,而对于out reacher(out of the eye)则发生在更高处,给了一个例子说,near the eye 30层高处比地面处风速快20miles/h.然后说相对于flight level 高空风速,eye surface地面时高空的90%,out reacher地面时高空的78%,也就是说一个当做的话,另外两个点都小一点
  P2:紧接这上段末尾的这个规律,讲了一个例外,
  说有一次,以前一直是一位上层比ground level厉害,结果某某台风,测量的结果是flight高度风力才150,另外两个风力比它还高/结果这个飓风是ground level比上层厉害,这就说明了,科学家之前认为的规律是有例外的,而且需要根据实际情况修正。然后分析这种例外,可能是由于什么导致的:
  一是:跟convection猜测是对流有关
  二是:和sea surface的热气流有关,最有一句话作者说要是不是的转换方法态度来测飓风什么的/用一些原始工具如气压表,温度计帮助调整参数是很必要的。
  背景知识
  Since 1997, forecasters have used Global Positioning System dropwindsondes, a measuring device dropped from hurricane reconnaissance aircraft into the eyewall—the windiest part of the hurricane. The sonde system measures temperature, barometric pressure, water vapor, and wind data every 15 feet on its way down. This new method gave meteorologists an important glimpse into the true strength of these devastating storms. The analyses of the dropwindsonde data indicated that, on average, the maximum sustained surface-wind speed was about 90 percent of the wind speed measured at the 10,000-foot aircraft level flown as Andrew approached south Florida. In 1992 Andrew's wind speed was estimated at 75 to 80 percent of the aircraft observations. The research findings resulted in an increase in the estimated wind speeds of Hurricane Andrew from 145 mph to 165 mph. Read more: Hurricanes - average, low, world, high, days, Hurricane and tropical storm season, Portrait of a hurricane, Hurricane casualties, The nations worst weather

考生可收藏无忧考网gmat频道,查看更多关于gmat考试相关信息!!

开通VIP会员 免费下载文档
GMAT最新更新
推荐阅读
网站首页 网站地图 返回顶部
无忧考网移动版 m.51test.net