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Title: GlObAl WarRmInG!!!! Sign of the End? Post by okasantina on Dec 6th, 2006, 4:17am Ok...let us focus on the meaning of it.... What is Global Warming?? Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades. The Earth's average near-surface atmospheric temperature rose 0.6 ± 0.2 °Celsius (1.1 ± 0.4 °Fahrenheit) in the 20th century [1]. The current scientific consensus is that "most of the observed warming over the last 50 years is likely to have been attributable to human activities"[2]. The extent of this consensus was the subject of a study—published in December 2004 in the journal Science—that considered the abstracts of 928 refereed scientific articles in the ISI citation database identified with the keywords "global climate change". This study concluded that 75% of the 928 articles either explicitly or implicitly accepted the consensus view — the remainder of the articles covered methods or paleoclimate and did not take any stance on recent climate change[3] [4]. The primary causes of the human-induced component of warming are the increased amounts of carbon dioxide (CO2) and other greenhouse gases (GHGs)[5]. They are released by the burning of fossil fuels, land clearing and agriculture, etc. and lead to an increase in the greenhouse effect. This effect was first described by Joseph Fourier in 1824, and first investigated quantitatively in 1896 by the Swedish chemist Svante Arrhenius[6], although the greenhouse effect did not enter into popular awareness until the 1980's. Climate sensitivity is a measure of the equilibrium response to increased GHGs, and other anthropogenic and natural climate forcings. It is found by observational [7] and model studies. This sensitivity is usually expressed in terms of the temperature response expected from a doubling of CO2 in the atmosphere. The 2001 IPCC report estimates a likelyhood between 66% and 90% for a climate sensitivity in the range 1.5–4.5 °C (2.7–8.1 °F)[8]. This should not be confused with the expected temperature change by a given date, which also includes a dependence on the future GHG emissions and a delayed response due to thermal lag, principally from the oceans. Models referenced by the Intergovernmental Panel on Climate Change (IPCC), using a range of SRES scenarios, project that global temperatures will increase between 1.4 and 5.8 °C (2.5 to 10.5 °F) between 1990 and 2100. 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. These changes may increase the frequency and intensity of extreme weather events, such as floods, droughts, heat waves, hurricanes, and tornados. Other consequences include higher or lower agricultural yields, glacial retreat, reduced summer stream flows, species extinctions and increases in the ranges of disease vectors. Warming is expected to affect the number and magnitude of these events; however, it is difficult to connect particular events to global warming. Although most studies focus on the period up to 2100, warming (and sea level rise due to thermal expansion) is expected to continue past then, since CO2 has an estimated atmospheric lifetime of 50 to 200 years. [9]. Only a small minority of climate scientists discount the role that humanity's actions have played in recent warming. However, the uncertainty is more significant regarding how much climate change should be expected in the future, and there is a hotly contested political and public debate over implementation of policies that deal with predicted consequences, what, if anything, should be done to reduce or reverse future warming, and how to deal with the predicted consequences. ::)Ok so much of the meaning..but does everyone knows the essence of it to us? Do anyone cares? Be a part and aware ... is it a crisis or just a pure hoax? ??? |
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Title: Re: GlObAl WarRmInG!!!! Sign of the End? Post by okasantina on Mar 13th, 2007, 4:53pm Its the first time in Yuzawa, Japan with NO SNOW! We were there 2 years ago and it was so awesome looking at those mountains with ice..we skii and played and made snowman ...but now! for the record there was NO SNOW showed up! ukashii na...wish everyone can be aware of whats happening around them duh... ::) :-/ |
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Title: Re: GlObAl WarRmInG!!!! Sign of the End? Post by ReeBop on Mar 28th, 2007, 8:12pm It is the "sign of the end" if we choose to remain blind to the reality of what we are doing to our planet. Maybe it will take an entire nation like Vanuatu to disappear under the waves for us to wake up to the fact that we don't really need to drive a Hummer H1, H2 or H3 to go to the 7-Eleven down on the corner. ::) |
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Title: Re: GlObAl WarRmInG!!!! Sign of the End? Post by 3iNnA on Dec 23rd, 2008, 4:25am I agree with you Reebop. People always say it doesn't matter...it won't happen in their time...have more kids so they could suffer...selfish I have to say...do what is best now for the planet so the future generation can enjoy it. Don't kill the planet cuz we need bigger cars, bigger homes....more stuff...more garbage... |
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Title: Re: GlObAl WarRmInG!!!! Sign of the End? Post by dOnUtz 9urL on Dec 31st, 2008, 3:06am I dont believe in global warming [smiley=roll.gif] tell AlGore, its -18F here and people said its the coldest winter they ever had since 1961 sooooooooo....get me Global warming LOL [smiley=whip.gif] and make my winter warmer [smiley=woot.gif] ;D |
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