Global Warming

Hi!!

what is global warming??

what is the effect of global warming??

Is there advendages??

2 個解答

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  • 1 十年前
    最愛解答

    Global warming is the observed 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 Earth's surface rose 0.74 ± 0.18 °C (1.3 ± 0.32 °F) in the last 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. Other phenomena such as solar variation and volcanoes have probably had a warming effect from pre-industrial times to 1950, but a cooling effect since 1950.[1] These conclusions have been endorsed by at least 20 scientific societies and academies of science, including all of the national academies of science of the G8 states. Some individual scientists disagree with parts of this conclusion as does the American Association of Petroleum Geologists.[2]

    Models referenced by the IPCC predict that global 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 as well as uncertainties regarding 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 no further greenhouse gases are released after this date.[1] This reflects the long average atmospheric lifetime of carbon dioxide (CO2).

    An increase in global temperatures can in turn cause other changes, including a rising sea level 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 consequences 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 especially how changes will vary from region to region across the globe. A hotly contested political and public debate also has yet to be resolved, regarding whether anything should be done, and what could be cost-effectively done to reduce or reverse future warming, or to deal with the expected consequences. Most national governments have signed and ratified the Kyoto Protocol aimed at combating greenhouse gas emissions.

  • 1 十年前

    1.全球暖化指的是在一段時間中,地球的大氣和海洋溫度上升的現象

    2.由於海洋溫度增加,南極和北極的冰川會加速融化,導致海平面上升,會淹沒沿海低海拔地區,例如大洋洲島國圖瓦魯已被水淹沒。

    全世界有3/4的人口居住在離海岸線不足500公里的地方,陸地面積縮小會極大地影響人類居住環境,甚至可能導致戰爭。

    由於海洋溫度增加,水蒸發加快,導致暴雨增加,水災會更加頻繁,水災面積擴大,水土流失嚴重。

    由於大氣溫度升高,導致熱帶傳染病向高緯擴散,目前已有熱帶傳染病擴散的跡象。

    由於大氣溫度升高,令蒸發率上升,導致內陸地區沙漠化加速,沙漠有擴大的危險。

    雖然由於溫度升高,有部分動植物會加快繁殖,但整個生物多樣性會受到威脅,許多物種會加速滅絕的步伐。

    由於兩極冰山崩塌,北歐、南美近極地的地方溫度會迅速下降,會嚴重影響當地生態系統,造成不可逆的變化。

    3. no

    2007-04-02 17:17:13 補充:

    sorry that I don't know you want English, really soory

    資料來源: wikipedia
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