Global Warming is Real.

GLOBAL WARMING IS REALAtmospheric carbon dioxide concentrations are higher today than at any time in at least the past 650,000 years. They are about 35% higher than before the industrial revolution, and this increase is caused by human activities, primarily the burning of fossil fuels. http://www.skeptic.com...; src="../../../photos/albums/1/4/3238/96287-3238-v3vsm-a.jpg" alt="http://www.skeptic.com...; /> http://www.skeptic.com...; src="../../../photos/albums/1/4/3238/96287-3238-38un8-a.jpg" alt="http://www.skeptic.com...; />Earth has been in radiative imbalance since at least the 1970s, where less energy leaves the athmosphere than enters it. Most of this extra energy has been absorbed by the oceans. It is very likely that human activities substantially contributed to this increase in ocean heat content. The amount of heat stored in the oceans is one of the most important diagnostics for global warming, because about 90% of the additional heat is stored there. The atmosphere stores only about 2% because of its small heat capacity. The surface (including the continental ice masses) can only absorb heat slowly because it is a poor heat conductor. Thus, heat absorbed by the oceans accounts for almost all of the planet’s radiative imbalance. http://www.realclimate.org...; src="../../../photos/albums/1/4/3238/96287-3238-7g8k4-a.jpg" alt="http://www.realclimate.org...; />Signs that the Earth is warming are recorded all over the globe. The easiest way to see increasing temperatures is through the thermometer records kept over the past century and a half. Around the world, the Earth's average temperature has risen more than 1 degree Fahrenheit (0.8 degrees Celsius) over the last century, and about twice that in parts of the Arctic. "The planet is red" in a global map of the change in average surface temperatures, noted Swiss climate scientist Thomas Stocker, co-chair of IPCC Working Group I responsible for this summary at a press conference. "The world is warming." http://data.giss.nasa.gov...; src="../../../photos/albums/1/4/3238/96287-3238-kw63s-a.jpg" alt="http://data.giss.nasa.gov...; />The Earth's average surface temperature rose by 0.74±0.18 °C over the period 1906–2005. The rate of warming over the last half of that period was almost double that for the period as a whole (0.13±0.03 °C per decade, versus 0.07±0.02 °C per decade). The urban heat island effect is very small, estimated to account for less than 0.002 °C of warming per decade since 1900. Temperatures in the lower troposphere have increased between 0.13 and 0.22 °C (0.22 and 0.4 °F) per decade since 1979, according to satellite temperature measurements. Climate proxies show the temperature to have been relatively stable over the one or two thousand years before 1850, with regionally varying fluctuations such as the Medieval Warm Period and the Little Ice Age.The climate system can respond to changes in external forcings. External forcings can "push" the climate in the direction of warming or cooling. Examples of external forcings include changes in atmospheric composition (e.g., increased concentrations of greenhouse gases), solar luminosity, volcanic eruptions, and variations in Earth's orbit around the Sun. Orbital cycles vary slowly over tens of thousands of years and at present are in an overall cooling trend which would be expected to lead towards an ice age, but the 20th century instrumental temperature record shows a sudden rise in global temperatures. For a direct look at the atmosphere of the past, scientists drill cores through the Earth's polar ice sheets. Tiny bubbles trapped in the gas are actually pieces of the Earth's past atmosphere, frozen in time. That's how we know that the concentrations of greenhouse gases since the industrial revolution are higher than they've been for hundreds of thousands of years.But if Global Warming is real, then why it is cold in US now? First of all US is not whole Earth, second of all may be because it is winter in northern pole. December 2013 was an unusually warm month even though it was colder in the U.S. In past December, North America was colder than the average over the past decade. But Europe and Russia were much hotter than average. India was cooler than average. Australia was warmer than average. Global Temprature is the average temprature of globe, and sorry US is not globe (and who cares about US). http://www.youtube.com...[1] - http://on.natgeo.com/1bNQQJe[2] - http://bit.ly/1acL5Jh[3] - http://wapo.st/1idDRX8[4] - http://bit.ly/1eiNzEA[5] - http://bit.ly/1bNR6rL[6] - http://bit.ly/19YXkZi[7] - http://1.usa.gov/1eEHLWB[8] - http://bit.ly/1cyoK8s[9] - http://bit.ly/1cyoLJA