Since the 1850s researchers have tried to show that variations in seasonal weather are connected in some ways with sunspots
On this basis, some meteorologists predicted that the winter of 1988-1989 in the United States would be severe. However, the winter was a mild one overall, and the meteorologists' attempt to make the connection between the Sun and weather on the Earth appeared unsuccessful, until Barston and Liverzey proposed a hypothesis explaining why the prediction had failed. They argued that the prediction had not taken into account another important element in the climate: the more or less regular pattern of fluctuations in the temperature of the surface waters of the tropical Pacific Ocean.
Barston and Livezey noted that when the water temperature is abnormally high-the phenomenon called EL Nino—the changes of cold winter weather over North American increase. The opposite situation, when surface temperatures are well below normal—La Nina—is far less common. In fact, until late 1988 no one had seen the combination of La Nina, westerly winds in the upper atmosphere, and high solar activity.
Thus, according to Barston and Livezey, La Nina cancelled out the effect of the other two climatic factors and caused the mild winter of 1988-1989. Although this hypothesis is plausible, much research remains to be done before meteorologists can establish and explain the effects of increased solar activity on seasonal weather changes.
The author of the passage would most likely agree
A.Because the evidence supporting such a link is questionable, future research in this particular area does not looking promising.
B. Because it is unlikely that such a link can be definitely established, scientists should concentrate their efforts on investigating the role La Nina and other climatic factors play in influencing global weather patterns.
C. Although some circumstantial evidence suggests that such a link exists, it is unlikely that future research will be able to confirm the existence of this link.
D. There is evidence supporting the existence of such a link, but without further scientific investigation that evidence cannot be considered proof that such a link exists.
E.Since the evidence clearly supports the existence of such a link, further research should focus on determining the implications of this link for the accurate prediction of changes in global weather patterns.
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