- UID
- 550226
- 在线时间
- 小时
- 注册时间
- 2010-7-27
- 最后登录
- 1970-1-1
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Structure
• 提出观点
• 证明观点
o 从原理出发-什么会影响飓风
o 一个人的历史数据 (以及她是怎么研究的)
o 别人的研究是同样的结果来加强
Attitude
这是一个客观的文章,作者以第三人称写了飓风频率的变化是属于正常现象,然后引用了证据。 作者是支持这个观点的,第三段However 之后应该是作者的说法,作者同意研究人员的结果, 然后接着论述。
Content
o A new analysis confirms: Spike in hurricane activity in the North Atlantic reflects a return to normal frequency after a lull in the 1970s and 1980s. (文章应该解释为什么是这样)
o P2
• 1995-2005,avg. 4.1 category-3-or-stronger hurricanes in the NA and the C. (wind speed> 178 km/h)
• 1971-1994, 1.5 avg. hurricanes according to KHK
• Two factors – wind share and sea-surface temperature (会不会继续讨论这两个因素呢?然后怎么确定这两个因素的影响- 文章讲风的影响更大)
o P3
• KHK studied marine records to estimate wind shear back to 1730 from luminescence of growth rings in coral and number of marine microorganisms in seafloor sediment (upwelling of nutrient-rich waters, another measure of wind shear at the ocean’s surface.
o P4
• Wind shear has a much stronger influence in the NA
• Large variations in frequency hve been the norm – avg. 3.25 category-3 or stronger hurricanes each year, however, >=6 lengthy intervals since 1730 had hurricane activity comparable to today’s. boosts in hurricane frequency is caused by weak wind shear.
o P5 strengthens statement in P4 with other analyses
• Periods with strong frequent E1 Ninos experienced a lower-than-average number of hurricanes.
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