Past studies have detected an ~ 1500-year climate cycle in various types of Pleistocene geologic or ice deposits. It has been proposed that a 1470-year cycle fits the Pleistocene Dansgaard-Oeschger (DO) oscillations and can be explained by a threshold model with forcing. We use nine temperature reconstructions to see if this cycle exists during the Holocene. All these datasets, except Greenland Holocene data, can be fit by models close to a 1470-year period or are compatible to such a model, or can be fit by cycles near 1200 years, both of which can be related to solar-forcing. These results lend suppor to the non-linear threshold model for initiation of Pleistocene DO events and suggest that this periodic climate cycle has continued into the Holocene, but with reduced magnitude.

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More than 1,000 dissenting scientists (updates previous 700 scientist report) from around the globe have now challenged man-made global warming claims made by the United Nations Intergovernmental Panel on Climate Change (IPCC) and former Vice President Al Gore. This new 2010 321-page Climate Depot Special Report -- updated from the 2007 groundbreaking U.S. Senate Report of over 400 scientists who voiced skepticism about the so-called global warming ?consensus? -- features the skeptical voices of over 1,000 international scientists, including many current and former UN IPCC scientists, who have now turned against the UN IPCC. This updated 2010 report includes a dramatic increase of over 300 additional (and growing) scientists and climate researchers since the last update in March 2009. This report's release coincides with the 2010 UN global warming summit in being held in Cancun.

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The massive bulk of evidence indicates that nothing is wrong, and that Hansen, Mann and the rest of the hockey team are not being honest with us.

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We check the main predictions of the climate models against the best and latest data. Fortunately the climate models got all their major predictions wrong. Why? Every serious skeptical scientist has been consistently saying essentially the same thing for over 20 years, yet most people have never heard the message -- here it is, put simply enough for any lay reader willing to pay attention.

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Report of the Commission to Assess the Threat to the United States from Electromagnetic Pulse (EMP) Attack Volume 1: Executive Report 2004.

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This paper assesses EPA’s rule setting standards for motor vehicle greenhouse gas emissions.

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We compare the performance of a recently proposed empirical climate model based on astronomical harmonics against all CMIP3 available general circulation climate models (GCM) used by the IPCC (2007) to interpret the 20th century global surface temperature. The proposed astronomical empirical climate model assumes that the climate is resonating with, or synchronized to a set of natural harmonics that, in previous works (Scafetta, 2010b, 2011b), have been associated to the solar system planetary motion, which is mostly determined by Jupiter and Saturn. We show that the GCMs fail to reproduce the major decadal and multidecadal oscillations found in the global surface temperature record from 1850 to 2011. On the contrary, the proposed harmonic model (which herein uses cycles with 9.1, 10–10.5, 20–21, 60–62 year periods) is found to well reconstruct the observed climate oscillations from 1850 to 2011, and it is shown to be able to forecast the climate oscillations from 1950 to 2011 using the data covering the period 1850–1950, and vice versa. The 9.1-year cycle is shown to be likely related to a decadal Soli/Lunar tidal oscillation, while the 10–10.5, 20–21 and 60–62 year cycles are synchronous to solar and heliospheric planetary oscillations. We show that the IPCC GCM’s claim that all warming observed from 1970 to 2000 has been anthropogenically induced is erroneous because of the GCM failure in reconstructing the quasi 20-year and 60-year climatic cycles. Finally, we show how the presence of these large natural cycles can be used to correct the IPCC projected anthropogenic warming trend for the 21st century. By combining this corrected trend with the natural cycles, we show that the temperature may not significantly increase during the next 30 years mostly because of the negative phase of the 60-year cycle. If multisecular natural cycles (which according to some authors have significantly contributed to the observed 1700–2010 warming and may contribute to an additional natural cooling by 2100) are ignored, the same IPCC projected anthropogenic emissions would imply a global warming by about 0.3–1.2 C by 2100, contrary to the IPCC 1.0–3.6 C projected warming. The results of this paper reinforce previous claims that the relevant physical mechanisms that explain the detected climatic cycles are still missing in the current GCMs and that climate variations at the multidecadal scales are astronomically induced and, in first approximation, can be forecast.

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Report of the Commission to Assess the Threat to the United States from Electromagnetic Pulse (EMP) Attack.

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Global warming is an objective fact with great uncertainty in the magnitude of the temperature increase. Worldwide observational data indicate that the global average temperature has increased during the last century. In addition to rising temperatures, evidence of global warming also includes the global increase in the average sea level, widespread snow and ice melt, and changes in plant phenology. However, this still has large uncertainties in the magnitude of the global temperature rise.

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