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Greenhouse Gases/Effect
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Greenhouse Gases (GHG's) are the various gases that block outgoing long-wave infrared from easily leaving our atmosphere. The Greenhouse Effect (GHE) is the physical mechanism of this blocking mechanism in our atmosphere that influence how much heat we retain within the atmosphere.
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Climate Feedback/Sensitivity
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Climate Feedbacks: An interaction mechanism between processes in the climate system is called a climate feedback, when the result of an initial process triggers changes in a second process that in turn influences the initial one. A positive feedback intensifies the original process, and a negative feedback reduces it.
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Climate Forcing
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Climate forcing has to do with the amount of energy we receive from the sun, and the amount of energy we radiate back into space. Variances in climate forcing are determined by physical influences on the atmosphere such as orbital and axial changes as well as the amount of greenhouse gas in our atmosphere.
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Denialist vs. Skeptic
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Denialist vs. Skeptic: What's the difference? As usual, context is key: Those skeptical of established science are not skeptics, they are denialists. Science is skeptical by it's nature because science doubts opinions and science is not based on opinion or belief, it examines evidence and physics.
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Myths vs. Facts: Global Warming
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2010 Nov - The Leading Edge
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Report: UN warns of threat to human progress; Transient Middle Eocene Atmospheric CO2 and Temperature Variations; Climate scientists plan campaign against global warming skeptics; Inaccurate news reports misrepresent AGU climate-science initiative; climate crisis is no crisis (media confusion); ClimateGate One Year Later; Energy & Environment Hearing; Philippines: Aquino calls for lifestyle change
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The Leading Edge
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2010
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31,000 scientists say "no convincing evidence".
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31,000 scientists reject global warming and say "no convincing evidence" that humans can or will cause global warming? But polls show that of scientists working in the field of climate science, and publishing papers on the topic: 97% of the climate scientists surveyed believe “global average temperatures have increased” during the past century; and 97% think human activity is a significant contributing factor in changing mean global temperatures. What is the significance of these statistics?
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Myths vs. Facts: Global Warming
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Pacific Decadal Oscillation (PDO)
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The Pacific Decadal Oscillation is a long-term fluctuation of the Pacific Ocean that waxes and wanes between cool and warm phases approximately every 5 to 20 years. In the cool phase, higher than normal sea-surface heights caused by warm water from a horseshoe pattern that connects the north, west and southern Pacific, with cool water in the middle. During most of the 1980s and 1990s, the Pacific was locked in the oscillation's warm phase, during which these warm and cool regions are reversed. http://www.jpl.nasa.gov/news/news.cfm?release=2008-066
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Human Caused Global Warming
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How do we know current global warming is human caused, or man made? Is global warming real, or a hoax? Consider the facts: the climate system is indicated to have left the natural cycle path; multiple lines of evidence and studies from different fields all point to the human fingerprint on current climate change; the convergence of these evidence lines include ice mass loss, pattern changes, ocean acidification, plant and species migration, isotopic signature of CO2, changes in atmospheric composition, and many others. The only identifiable cause explaining these changes with confidence is human influence and increased greenhouse gas emissions. Science has simply not found any other cause factor that can account for the scale of the recent increase in radiative forcing and associated warming.
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North Atlantic Oscillation (NAO)
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The North Atlantic Oscillation (NAO) is a measure of the strength of the westerlies across the North Atlantic. Originally defined by Sir Gilbert Walker in 1932 as the difference in pressure between Ponta Delgada on the Azores and Stykkisholmur in Iceland.
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Medieval Warm Period
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The Medieval Warm Period (MWP) occurred around one thousand years ago. This is known by examinations of ice core records and multiple proxy models from multiple interrelated disciplines.
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