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<blockquote data-quote="hultman" data-source="post: 270880" data-attributes="member: 71440"><p>Global Warming - Scientific Controversies in Climate Variability </p><p>International seminar meeting at The Royal Institute of Technology (KTH), Stockholm, Sweden </p><p></p><p>"1. It is likely that there has been a climate trend towards global warming underway since 1850, however there is no strong evidence to prove significant human influence on climate on a global basis. The global cooling trend from 1940 to 1970 is inconsistent with models based on anthropogenic carbon dioxide emissions. Actual claims put forward are that an observed global temperature increase of about 0.3 degrees C since 1970 exceeds what could be expected from natural variation. However, recent temperature data do not indicate any continued global warming since 1998.</p><p></p><p>2. There are many uncertainties in climate modelling, and furthermore the modelling basis is incomplete. Even normal meteorological, cloud-related considerations are, in general, poorly understood in the context of “climate change/global warming". </p><p></p><p>3. Natural variations in climate are considerable and well-documented by geological, oceanographic and historical sources. They are furthermore heavily correlated with sunspot frequencies and other cosmic effects which also operate on cloudiness. The latter effects (also very recently experimentally confirmed by Svensmark and associates) are not currently accounted for in climate models. </p><p></p><p>4. There is no reliable evidence to support that the 20th century was the warmest in the last 1000 years. Previous claims based on the “Mann hockey-stick curve" are by now totally discredited. </p><p></p><p>5. Policies such as carbon taxes and carbon trading are expensive and inefficient and likely to be abused by various actors.</p><p></p><p>6. The most important strategy is undoubtedly to ensure that the challenges of future climate change, natural or man-made, can be met. In a few decades, global cooling is predicted based on aspects related to solar cycles. </p><p></p><p>There is no doubt that the science behind “the climate issue" is far from settled. As so many cosmic effects are omitted from climate models, there is no credibility for arguments such as “there is no other explanation" [than anthropogenic generation of carbon dioxide]. This must be remembered when making future political decisions related to these matters."</p></blockquote><p></p>
[QUOTE="hultman, post: 270880, member: 71440"] Global Warming - Scientific Controversies in Climate Variability International seminar meeting at The Royal Institute of Technology (KTH), Stockholm, Sweden "1. It is likely that there has been a climate trend towards global warming underway since 1850, however there is no strong evidence to prove significant human influence on climate on a global basis. The global cooling trend from 1940 to 1970 is inconsistent with models based on anthropogenic carbon dioxide emissions. Actual claims put forward are that an observed global temperature increase of about 0.3 degrees C since 1970 exceeds what could be expected from natural variation. However, recent temperature data do not indicate any continued global warming since 1998. 2. There are many uncertainties in climate modelling, and furthermore the modelling basis is incomplete. Even normal meteorological, cloud-related considerations are, in general, poorly understood in the context of “climate change/global warming". 3. Natural variations in climate are considerable and well-documented by geological, oceanographic and historical sources. They are furthermore heavily correlated with sunspot frequencies and other cosmic effects which also operate on cloudiness. The latter effects (also very recently experimentally confirmed by Svensmark and associates) are not currently accounted for in climate models. 4. There is no reliable evidence to support that the 20th century was the warmest in the last 1000 years. Previous claims based on the “Mann hockey-stick curve" are by now totally discredited. 5. Policies such as carbon taxes and carbon trading are expensive and inefficient and likely to be abused by various actors. 6. The most important strategy is undoubtedly to ensure that the challenges of future climate change, natural or man-made, can be met. In a few decades, global cooling is predicted based on aspects related to solar cycles. There is no doubt that the science behind “the climate issue" is far from settled. As so many cosmic effects are omitted from climate models, there is no credibility for arguments such as “there is no other explanation" [than anthropogenic generation of carbon dioxide]. This must be remembered when making future political decisions related to these matters." [/QUOTE]
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