Humans Cause Global Warming

Rebuttals: 1. First, consensus is irrelevant to science. Galileo opposed consensus, Einstein opposed consensus. As Einstein noted, it only took one person, one paper, to disprove his theory. Further, getting a mere list actually does not represent the opinion of climate scientists. Other scientists are irrelevant (except geologists and meteorologists). The majority of debate only happens in political literature, not scientific literature. There is actually a consensus in favor of global warming. No major scientific organization opposes man-made global warming. 97% of climate scientists say global warming is man-made. Although this point is mainly irrelevant, the opposite of my opponents argument is true [1]. 2. Long term trends cannot be decided in 15 years. Richard Muller, former skeptic, website notes, “Some people draw a line segment covering the period 1998 to 2010 and argue that we confirm no temperature change in that period. However, if you did that same exercise back in 1995, and drew a horizontal line through the data for 1980 to 1995, you might have falsely concluded that global warming had stopped back then. This exercise simply shows that the decadal fluctuations are too large to allow us to make decisive conclusions about long term trends based on close examination of periods as short as 13 to 15 years. ”[2] Many temperature datasets do not include the Arctic where it has been warming. Studies accounting for many factors, such as the 1998 El Nino, and others, conclude the earth is still warming at the same rate it was in the 1990s [3]. 3. Stopping global warming and its effects on the economy are irrelevant to what causes the warmth. This is totally irrelevant in this debate. Case 1. Many studies indicate the overall human impact on global warming is far greater than the natural impact, interestingly many natural impacts are having a cooling effect on the warming. Teet et al. 2000 finds human activity caused over 100% of the warming from 1940 – 1997. How do you get 100%? Natural forcing’s causing a cooling effect, meaning we reversed those factors and caused warming. Meehl et al. 2004 finds humans caused 80% of the warming in the last century. Stone et al. 2007 found we caused almost 100% of the warming in the last 60 years. In a second paper, he noted humans caused 50% of the warming, the other half displaced by areosols, and the sun and volcanoes were responsible for 13 and 37% of the warming. Lean and Rind 2008 finds humans have caused 80% of the modern warming. Sott et al. used the same approach of Lean and Rind, but finds humans have caused 86% of the global warming. Huber and Knutti 2011 finds humans have caused 75-100% of the modern global warming. Foster and Rhmstorf 2011 finds that humans have caused 100% of the warming in the last 60 years. Gillet et al. 2012 finds we caused over 100% of the modern warming, as it had to overstep cooling effects and cause warming, making it over 100% [4]. 2. The sun, what my opponent argues causes global warming, is not the cause of modern warming. Sun Spots, overall, have no trend proving they likely do not cause the modern warming phase. The current sun spot number is like it was in 1913, when it was very cold, unlike this year, again showing the sun- not a candidate for modern warming [5]. 3. Scientific bodies have ruled out natural factors, man-made theory is the only possible thing left. Conclusion: Humans are the cause of global warming. 1. . http://en.wikipedia.org... 2. . http://berkeleyearth.org... 3. . http://www.skepticalscience.com... 4. . http://www.skepticalscience.com... 5. . http://ossfoundation.us...