编辑-地球科学江南体育网页版堆栈交换江南电子竞技平台

你不是登录。你的编辑将被放置在一个队列,直到同行评议。

我们欢迎编辑,使读者更容易理解和更有价值。因为社区成员审查编辑,请尽量使文章更好比你怎么发现,例如,通过修正语法或添加额外的资源和超链接。

还有臭氧层的洞?

在90年代,有一个洞在南极洲臭氧层一样大。《蒙特利尔议定书》诞生后,有害的氟氯化碳不再发出和臭氧层问题平息。

我只是看美国国家航空航天局关于臭氧层数据2021年9月,似乎有一个洞在南极洲臭氧层一样大。仍然是这种情况如何?为什么还有一个洞在臭氧层吗?

回答

>为什么还有臭氧层的洞?最有可能在某种程度上,将永远是一个区域在南极平流层臭氧含量减少后期南半球的冬天。(我写了“总是”。阅读,意味着接下来的几个几百万年。)问题是一年一度的臭氧空洞存在多久,臭氧空洞就多大,多深耗尽,臭氧层空洞,和(最重要的)对世界意味着什么。原因将继续存在在某种程度上是火山可以注入ozone-deleting化学物质直接进入平流层。然而,现在,最糟糕的ozone-deleting平流层中的化学物质化学物质是由人类引起的。许多这些化学物质在几十年内仍将是大气中生产后停止。例如,下面的图表描述了三氯氟甲烷的量(即Freon-11和其他名称)在大气中:[!(三氯氟甲烷在大气中的浓度从1978年到2021年][1]][1]的图表,很明显的浓度在1993年达到顶峰,此后一直在缓慢下降。 It has been almost 30 years since the production of trichlorofluoromethane has been banned, and yet the levels remain well above the late 1970s level. Ozone-depleting chemicals such as trichlorofluoromethane take decades to centuries to leave the atmosphere, even in the case that production has been completely eliminated. Trichlorofluoromethane, for example has an atmospheric half life of 40 to 100 years, depending on which article one reads. The Montreal Protocol does nothing to address the long-lived nature of those ozone-depleting substances. Once those substances get into the atmosphere, they are going remain in the atmosphere for a long time. The Montreal Protocol did not tell countries to immediately stop producing ozone-depleting substances and to collect and destroy all known stockpiles of ozone-depleting substances. What it did do was to issue a phased shutdown of production of those ozone-depleting substances. Some such as halon were phased out more slowly than freon. Others such as carbon tetrachloride have not yet been completely phased out. From the above graph, there was a slight stall in the decline starting around 2013 or so. This apparently was illegal production in Asia, later chased down to China. But this was a slight stall. The important thing to read from the graph is that it will take a long time for those human-created ozone-depleting chemicals to vanish. To make matters worse, the replacements for substances such as Freon and Halon also tend to be ozone-depleting substances. They're not nearly as bad in terms of ozone depletion potential as Freon and Halon, but they still are ozone-depleting substances. [1]: https://i.stack.imgur.com/5on5F.png

编辑总结

取消

添加一个评论 |

正确的小错误或错误
澄清的意思,而不更改它
添加相关资源或链接
总是尊重作者的意图
不使用编辑与作者回复

创建代码用引号”或式子~篱笆
' ' '
像这样
' ' '
添加语言标识符来突出显示的代码
”“python
def函数(foo):
打印(foo)
' ' '
把段落之间的回报
在结束linebreak添加2个空间
_italic_或* *的* *
报价将>开始的
做链接(尽量使用https)
< https://example.com >
(例子)(https://example.com)
< a href = " https://example.com " > < / >示例
MathJax方程罪\ \ ^ 2θ美元

格式帮助»
回答帮助»

MathJax帮助»