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Greenhouse gases making hurricanes stronger

Le 30 novembre 2016, 04:56 dans Humeurs 0

  Hurricane breeding grounds (发源地) in the Atlantic and Pacific oceans are being warmed by greenhouse gases, probably making hurricanes stronger in coming decades, according to a new study by the Proceedings of the National Academy of Sciences (PNAS).

  The scientists used 22 climate models to investigate the possible causes of a rise in sea surface temperatures (SST) of up to 0.67℃ in the Atlantic and Pacific tropics (热带地区) from 1906 to 2005.

  Each computer model was run several times to work out how much the SST would have warmed with or without rising levels of greenhouse gases and other pollutants. “We’ve used all the world’s climate models to study the causes of the SST changes in hurricane formation regions,” Santer said.

  They found that tiny particulates (微粒) from volcanoes and sulfates (硫酸盐) from industrial plants blocked the sun, and so cooled the oceans. But the effect was overcome by the rise in greenhouse gases, which led to warmer oceans.

  “The important conclusion is that the observed SST increases in the regions cannot be explained by natural processes alone,” said Tom Wigley, another researcher of the study, from the Boulder-based National Center for Atmospheric Research (NCAR). “The best explanation for these changes has to include a large human influence.” Also, Wigley warns that global temperatures and SSTs may increase even more rapidly over the next century.

  Hurricanes are a complex phenomenon that is influenced by a variety of physical factors, such as SSTs, wind shear (剪应力), water vapor, and atmospheric stability. In the Atlantic and Pacific hurricane formation regions, hurricane intensity is not only determined by the increasing SSTs, which, though, are likely to be one of the most significant influences.

  Help:

  investigate v. to examine something carefully, especially to discover the truth 深入研究

  intensity n. the quality of being felt very strongly or having a strong effect强度

  True (T) or False (F):

  1. In a way, greenhouse gases are blamed for the increasing SST.

  2. Any pollutant can be seen as one cause of a rise in SST.

  3. In Tom’s opinion, human influence is closely linked to the increasing SST.

  4. SSTs are one of physical factors which influence hurricanes.

On Changes

Le 2 novembre 2016, 04:36 dans Humeurs 0

  Change is the only absolute nuskin hk   in the world,   the only thing   that you can depend on.   Nothing stays the same.   Tomorrow will come,   bringing with it   new beginnings and sometimes   unexpected endings reenex hong kong.   You can hold on to the past   and get left in the dust;   or, you can choose to   jump on the ride of life   and live a new adventure   with perseverance   and an open mind reenex facial.

Seeing is not necessarily true

Le 13 octobre 2016, 06:30 dans Humeurs 0

Two travelling angels stopped to spend the night in the home of a wealthy family tourism industry news. The family was rude and refused to let the angels stay in the mansion's guestroom. Instead the angels were given a small space in the cold basement. As they made their bed on the hard floor, the older angel saw a hole in the wall and repaired it. When the younger angel asked why, the older angel replied, "Things aren't always what they seem." The next night the pair came to rest at the house of a very poor, but very hospitable farmer and his wife. After sharing what little food they had the couple let the angels sleep in their bed where they could have a good night's rest. When the sun came up the next morning the angels found the farmer and his wife in tears marketing course. Their only cow, whose milk had been their sole income, lay dead in the field. The younger angel was infuriated and asked the older angel how could you have let this happen? The first man had everything, yet you helped him, she accused. The second family had little but was willing to share everything, and you let the cow die. "Things aren't always what they seem," the older angel replied. "When we stayed in the basement of the mansion, I noticed there was gold stored in that hole in the wall. Since the owner was so bsessed with greed and unwilling to share his good fortune, I sealed the wall so he wouldn’t find it." "Then last night as we slept in the farmers bed, the angel of death came for his wife. I gave him the cow instead. Things aren't always what they seem." Sometimes that is exactly what happens when things don't turn out the way they should uk data sim.If you have faith, you just need to trust that every outcome is always to your advantage. You might not know it until some time later...

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