作者watchAlearn (WatchAndLearn)
看板NUK_EE100A
標題[討論] 普化作業(2)
時間Wed Jan 6 22:27:27 2010
Thus the temperature of the eatth, surface is controlled to a significant
extent by the carbon dioxide and water content of the atmosphere. The effect
of atmospheric moisture (humidity) is apparent in the Midwest. In summer when
the humidity is high, the heat of the sun is retained well into the nigh,
giving very high nighttime temperatures. On the other hand, in winter the
coldest temperatures always occur on clear nights, when the low humidity
allows efficient radiation of energy back into space.
The atmosphere's water content is controlled by the water cycle
(evaporation and precipitation), and the average content remains constant
over the years. However, as fossil fuels have come into more extensive use,
the carbon dioxide concentration has increased significantly. This increase,
which was 16% from 1880 to 1980, has continued in the past two decade. Some
projects indicate that the carbon dioxide content of the atmosphere may be
double in the twenty-first century what it was in 1880. As a result, the
earth's average temperature could increase by as much as 3℃,cause dramatic
changes in climate and greatly affecting the growth the food crops.
Most atmospheric scientists believe the warming trend has already started.
For example, in 2005 the global average temperature of 14.6℃(58.3℉) was the
warmest since records have kept starting in the late 1800s. Global average
temperatures have risen 0.6℃ in the past 30 years and 0.8℃ in the past
century.
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◆ From: 118.171.81.152
※ 編輯: watchAlearn 來自: 118.171.81.152 (01/06 22:40)
※ 編輯: watchAlearn 來自: 118.171.81.152 (01/06 22:42)
1F:→ shianung:= =" 你誰阿? 01/06 22:55
2F:→ scorpiom6:inctreased? increased吧? 01/06 23:29
3F:→ scorpiom6:atomsphere 手打的嗎? 錯別字XD 01/06 23:31
4F:推 magicborder:被控制碼嚇到.... 01/06 23:36
※ 編輯: watchAlearn 來自: 118.171.81.152 (01/06 23:46)
5F:→ watchAlearn:感謝scorpiom6 已更正 想睡覺了...... 01/06 23:47
6F:→ froggg:再說囉~~ 01/06 23:50
7F:推 j780719:可以唷~ 01/07 13:14
8F:推 q4690744:喔 有我ID呢? 01/18 07:42