Global warming

global warming has caused anomalies in climate of different places around the world.
Thrsr aberration may seem trivial,yet they could be symptoms of impending calamity.

2007-05-04 18:21:39 補充：
Thrsr=these...我打錯左..

Global warming is the increase in the average temperature of the Earth's near-surface air and oceans in recent decades and its projected continuation.

Global average air temperature near the Earth's surface rose 0.74 ± 0.18 °C (1.3 ± 0.32 °F) during the past century. The Intergovernmental Panel on Climate Change (IPCC) concludes, "most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations,"[1] which leads to warming of the surface and lower atmosphere by increasing the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes have probably had a small warming effect from pre-industrial times to 1950, but a cooling effect since 1950. The basic conclusions have been endorsed by at least 30 scientific societies and academies of science, including all of the national academies of science of the major industrialized countries. The American Association of Petroleum Geologists is the only scientific society that rejects these conclusions,[2][3] and a few individual scientists also disagree with parts of them.[4]

Climate models referenced by the IPCC project that global surface temperatures are likely to increase by 1.1 to 6.4 °C (2.0 to 11.5 °F) between 1990 and 2100.[1] The range of values reflects the use of differing scenarios of future greenhouse gas emissions and results of models with differences in climate sensitivity. Although most studies focus on the period up to 2100, warming and sea level rise are expected to continue for more than a millennium even if greenhouse gas levels are stabilized.[1] This reflects the large heat capacity of the oceans.

An increase in global temperatures can in turn cause other changes, including sea level rise, and changes in the amount and pattern of precipitation. There may also be increases in the frequency and intensity of extreme weather events, though it is difficult to connect specific events to global warming. Other effects may include changes in agricultural yields, glacier retreat, reduced summer streamflows, species extinctions and increases in the ranges of disease vectors.

Remaining scientific uncertainties include the exact degree of climate change expected in the future, and how changes will vary from region to region around the globe. There is ongoing political and public debate regarding what, if any, action should be taken to reduce or reverse future warming or to adapt to its expected consequences. Most national governments have signed and ratified the Kyoto Protocol aimed at combating greenhouse gas emissions.

全球暖化
　

　

　





　


　

　 你是否知道?

　

　

在過去的一百年間，全球平均溫度整整上升了一度!

　

根據住在北極的居民表示，現在冬天到冰上打獵是非常危險的事，因為以前天氣較寒冷，結冰後，冰層 變得十分厚，人可以在冰上行走，不會破裂。但現在冰層變薄，以前他們不用乘船去打獵，但現在則要拖一艘船同行。

　

你知道為什麼會出現這樣的情況嗎?

　

　



　

自工業革命以來，全球氣溫不斷上升。全球增溫是由 於人為工業排放出很多溫室氣體，特別是二氧化碳。科學家預測若目前的工業排放量不加以限制，到了二一零零年全球平均溫度可能會上升兩度左右。

　



所以，可以肯定的是，人類的行為加促了地球暖化!

　

　

　



全球平均溫差變化 1860-2000

　

　



全球平均大氣溫度 1860-2000

　

我們希望透過這個網頁，能夠令大家多一點了解什麼是全球暖化、它的成因及影響!

其實，在過往的十多年中，國際間為了解決這個問題已付出了不少努力。可是，由於缺乏市民的參與令危機至今依未舒緩。

所以，為了同心解決全球暖化這個危機，你們準備好了嗎!?!!?!