Yes, CO2 changes over billions of years - so why is it increasing so rapidly now over a 150 year period? Can you find me a relative acceleration rate of CO2 levels anytime in the past, or do you believe it was always fluctuating this rapidly in the past but we just didn't have the modern instruments to measure to this resolution?
Humans contribute to CO2 emissions, but we don't know exactly how CO2 levels impact the climate in general, and we don't (and never will) have sufficient data to be able to determine whether or not recent changes in the climate (temperatures, sea levels, extreme weather events, ice caps etc) are unusual compared to historical cycles over the past few billion years.
Syracuse University scientist seeks to set the record straight on climate research Recent media reports misrepresent his research Mar 28, 2012 | Article by: Judy Holmes
Ikaite crystal found in sediment cores drilled off the coast of Antarctica.
Recently published climate research by Zunli Lu, a geochemist in the Department of Earth Sciences in Syracuse University’s College of Arts and Sciences, has gone viral across the Internet by bloggers. A number of media outlets, including the Daily Mail and The Register, which are published in the United Kingdom, claim this research supports arguments that human-induced global warming is a myth. The claims, Lu says, misrepresent his work and the conclusions in the study. The statement below is an effort to set the record straight. The original news story about the research is posted on Arts and Sciences News.
Zunli Lu: “It is unfortunate that my research, “An ikaite record of late Holocene climate at the Antarctic Peninsula,” recently published in Earth and Planetary Science Letters, has been misrepresented by a number of media outlets.
Several of these media articles assert that our study claims the entire Earth heated up during medieval times without human CO2 emissions. We clearly state in our paper that we studied one site at the Antarctic Peninsula. The results should not be extrapolated to make assumptions about climate conditions across the entire globe. Other statements, such as the study “throws doubt on orthodoxies around global warming,” completely misrepresent our conclusions. Our study does not question the well-established anthropogenic warming trend.”
Yes mate, come back when you can come up with peer-reviewed literature (instead of a press release from almost 10 years ago) to support what you are saying.
The Harvard-Smithsonian Centre review of 200 climate studies post dates the Michael Mann assertion that the MWP was confined to Europe and near areas in his 2002 paper "Medieval Climatic Optimum" here.
The Harvard-Smothsonian Centre review of 200 climate studies post dates the Michael Mann assertion that the MWP was confined to Europe and near areas in his 2002 paper "Medieval Climatic Optimum" here.
My links were to literature from 2008 and 2009, not 2002. Your press release was from 2003.
And if you really, truly want data about the causes of warming in the MWP then please see the links below. If you want to just argue then find some biased news article and post it up.
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