argument47 fly aw 第十三次作业

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argument47 Scientists studying historical weather patterns have discovered that in the mid-sixth century, Earth suddenly became significantly cooler. Although few historical records survive from that time, some accounts found both in Asia and Europe mention a dimming of the sun and extremely cold temperatures. Either a huge volcanic eruption or a large meteorite colliding with Earth could have created a large dust cloud throughout Earth's atmosphere that would have been capable of blocking enough sunlight to lower global temperatures significantly. A large meteorite collision, however, would probably create a sudden bright flash of light, and no extant historical records of the time mention such a flash. Some surviving Asian historical records of the time, however, mention a loud boom that would be consistent with a volcanic eruption. Therefore, the cooling was probably caused by a volcanic eruption.

承认significantly cooler这一事实，否认dimming of the sun导致了这一事实，继续否认volcanic eruption导致了dimming of the sun.

In this argument, the arguer mentioned a significantly cooler weather pattern in mid-sixth century caused by a dimming of the sun because of a volcanic eruption. It seems that the arguer is too hesitate to making the conclusion.

The arguer mentioned only few records in Asia and Europe show the crew of extremely cold temperatures. In another word, the evidence of this sudden cold weather pattern is not completely enough. First of all, the records in the mid-sixth century are always not so difficult to search. Especially in the big countries such as China or England, weather records in that time are a complex system and are saved by the national segments. Second, other weather patterns may be recorded in that time but information is not shown in the argument. It is reasonable to have such a mind just as the extremely cold weather occurred in Mongolia several years ago but the hottest weather occurred in some tropic countries and the clear trend to show the global warmer weather. So that we can not be persuaded by the argument unless more powerful witness given by the arguer.

We also puzzled why the arguer insist that the cooling, if truly present, caused by a volcanic eruption but not a large meteorite collision. The supporting of this conclusion is that no evidence mentioned a sudden bright flash has been recorded and a loud boom recorded in that time showing that the volcanic eruption is the most probably causing of the cold weather. The arguer is ignore a possible situation that the collision occurred in the day time then people can not see the flash but also heart a loud boom. Other evidence must be given out. Maybe scientists can find some other nature records like the relic after the erupting of a big volcano to support the conclusion.

In a word, unless more meticulous evidences given by the arguer, we can not accept that had such a cold weather caused by volcanic eruption in mid-sixth century.
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