2010年3月4日星期四

RRJ#4

Reference:
Dybas, C, Hosanskuy, D, and Weiss, P. (2010, Jan. 28). White Roofs Successfully Cool Cities. National Science Foundation. Retrieved Feb.22,2010,from http://www.nsf.gov/news/news_summ.jsp?cntn_id=116283&org=ERE&from=news

Summary:
According to this article, the scientists from “the National Center for Atmospheric Research (NCAR)” claim that they have a new theory, a white roof can reduce the “heat island effect”. This research team’s leader, Keith Oleson, and his colleagues created a new computer program that focuses on the effect of climate changing and rising temperatures on our large cities population. The scientists can use this computer program to do some experiments and explore the effects that climate changing and rising temperatures bring to us. As this new theory is created by this new computer program, it supposes of white roofs in city areas, and advises the scientists that cities would benefit from white roofs. However, the researchers realized that there still are some encumbrances; we doubt its feasibility. This article gives us an example that if you wear a white t-shirt walking on a sunny day, you would feel cooler than wearing a black t-shirt. Therefore, the computer model tell us, if in a big city, each roof is painted in white color, the heat would be reduced by about 33%. Actually, for some reasons, such as the air-conditioning and heating, the effect may less than this data. The white roofs might not know anymore. Oleson said that it was not as simple as just painting the roofs. So the research team listed several factors that the white roofs might useful. First, if a city has a mass of roofs together, white color is usable. Second, if a roof is made by metal or can insulation there is less impact when it is changed in white. The last is that white roofs would have a large effect in the some warm climates. This research team will continue this study to save our people from is that white roofs would have a large effect in the some warm climates. This research team will continue this study to save our people from global warming.

Reaction:
In my opinion, this article has its own significance. Even though we still cannot find an efficacious way to solve the global warming problem, I am very glad to see this new theory! Nowadays, our earth faces many serious problems, such as global pollution, climate changing, resource consuming and white pollution. All the above problems harm humans and threaten us with our life. A few days ago, I heard my friend say that he didn’t think that our earth was facing the temperatures rising problem; this winter was colder than before! However, I disagreed with him; he just evades the truth. In 2009, we had a famous and great movie, called “2012”. When I saw this movie, I felt the fear, even a week after I saw the movie. We have many movies that are about the earth being destroyed, but this movie especially gives us a true feeling, that global warming is the most serious problem, which we need to try our best to solve. The scientists from the National Center for Atmospheric Research give us the hope, and let us believe that we still have ability to challenge the miserable plight. Although I don’t understand the fundamental theory, I think using the special colors to decrease temperatures is a wonderful idea. I very much appreciate these researchers, because they have much creative thinking; I won’t feel very afraid or feel worried about our earth. I believed we can save our lives successfully.

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