New satellite dataset finds global temperatures decreased from 1982-2006
New satellite dataset finds global temperatures decreased from 1982-2006
http://hockeyschtick.blogspot.com/2013/08/new-satellite-dataset-finds-global.html
A new peer-reviewed paper published in Energy & Environment analyzes 24 years of data from the European Meteosat weather satellite and finds global temperatures decreased over the period 1982-2006. According to the authors,
“Our observations point to a decrease in planetary temperature over almost the entire hemisphere, most likely due to an increase of cloudiness.”
“The cloud filtered temperature change patterns, in figure 2c, indicate that the largest decrease occurs in the more cloudy regions of the hemisphere: the tropics and the temperate zones, while in the desert belt the temperature decrease is much smaller. This suggests that cloudiness changes could be the mechanism behind the observed global cooling since 1982: an increase in cloudiness would decrease global radiation and increase rainfall and evapotranspiration. Both effects tend to decrease the surface temperature.”
Full paper available here
Meteosat Derived Planetary Temperature Trend 1982-2006
Andries Rosema1, Steven Foppes1, Joost van der Woerd1
1EARS Earth Environment Monitoring Ltd., Delft, the Netherlands Kanaalweg 1, 2628 EB Delft, the Netherlands
Abstract
24 year of Meteosat hourly thermal infrared data have been used to study planetary surface temperature change. Thermal infrared radiation in the 10.5-12.5mm spectral window is not affected by CO2 and only slightly by atmospheric water vapor. Satellite thermal infrared data have been converted to brightness temperatures as prescribed by Eumetsat. Hourly brightness temperature images were then composed to corresponding noon and midnight temperature data fields. The resulting data fields were cloud filtered using 10, 20 and 30 day maximum temperature substitution. Filtered data were subsequently averaged for two 10 yearly periods: 1986-1995 and 1996-2005. Finally the change in brightness temperature was determined by subtraction. In addition nine locations were selected and data series were extracted and studied for the period 1982-2006. Our observations point to a decrease in planetary temperature over almost the entire hemisphere, most likely due to an increase of cloudiness. Two small areas are found where a considerable temperature increase has occurred. They are explained in terms of major human interventions in the hydrological balance at the earth surface.
Related posts on clouds…
New paper finds the “fingerprint of man-made global warming” doesn’t exist
New paper finds the “fingerprint of man-made global warming” doesn’t exist
http://hockeyschtick.blogspot.com/2013/08/new-paper-finds-fingerprint-of-man-made.html
A new peer-reviewed paper published in Energy & Environment confirms from the latest satellite data that the tropospheric “hot spot” or so-called “fingerprint of man-made global warming” predicted by climate models does not exist. The authors find surface warming exceeds tropospheric warming, the opposite of model predictions, suggesting there are fundamental flaws in the physical assumptions of the models.Full paper available hereReconciling Observations of Global Temperature Change: 2013David H. Douglass 1, John R. Christy 21 Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA2 Department of Atmospheric Science and Earth System Science Center, University of Alabama in Huntsville, Huntsville, AL 35899, USA
Abstract: In 2000 a panel of the U.S. National Research Council in a report with the same title suggested, among other things, that a “substantial disparity remains” between the observed warming rates of the surface and troposphere. Also, in 2000, the climate models showed more warming of the tropical atmosphere than was observed. Many papers have been written since then. We discuss the most recent papers on this subject and using the latest data show that the differences remain unresolved.
Prior posts on the “hot spot”…
New paper finds lunar-tidal cycles explain much of the 20th century global temperature changes — Published in Energy & Environment
New paper finds lunar-tidal cycles explain much of the 20th century global temperature changes
http://hockeyschtick.blogspot.com/2013/08/new-paper-finds-lunar-tidal-cycles.html
A new peer-reviewed paper published in Energy & Environment finds long-term lunar tide cycles “lead to conditions that preferentially favor the onset of La Niña/El Niño events that last for approximately 30 years” and significantly affect global temperatures. The author concludes, “the IPCC needs to take into consideration the possibility that long term Lunar atmospheric tides could be acting as a trigger to favor either El Niño or La Niña conditions and that these changes in the relative frequency of these two type of events could be responsible for much of the observed changes in the world mean temperature during the 20th century.”Are Global Mean Temperatures Significantly Affected by Long-Term Lunar Atmospheric Tides?Ian R. G. WilsonLiverpool Plains Daytime Astronomy Centre, Curlewis, NSW, AustraliaAbstract: Wilson and Sidorenkov find that there are four extended pressure features in the summer (DJF) mean sea-level pressure (MSLP) anomaly maps that are centred between 30 and 50° S and separated from each other by approximately 90° in longitude. In addition, they show that, over the period from 1947 to 1994, these patterns drift westward in longitude at rates that produce circumnavigation times that match the 18.6 year lunar Draconic cycle. These type of pressure anomaly pattern naturally produce large extended regions of abnormal atmospheric pressure that pass over the semi-permanent South Pacific sub-tropical high roughly once every ~ 4.5 years. These moving regions of higher/lower than normal atmospheric pressure increase/decrease the MSLP of the semi-permanent high pressure system, temporarily increasing/reducing the strength of the East-Pacific trade winds. This leads to conditions that preferentially favor the onset of La Niña/El Niño events that last for approximately 30 years. Wilson and Sidorenkov find that the pressure of the moving anomaly pattern changes in such a way as to favor La Niña over El Niño events between 1947 and 1970 and favor El Niño over La Niña events between 1971 and 1994. This is in agreement with the observed evolution of the El Niño/ La Niña events during the latter part of the 20th century. They speculate that the transition of the pattern from a positive to a negative pressure anomaly follows a 31/62/93/186 year lunar tidal cycle that results from the long-term interaction between the Perigee-Syzygy and Draconic lunar tidal cycles. Hence, the IPCC needs to take into consideration the possibility that long …
Even BBC features harsh criticism of new study: ‘Their strong statement about a general causal link between climate and conflict is unwarranted by the empirical analysis that they provide’
BBC Excerpt:
Other researchers have questioned whether climate breeds conflict.
Work published in the Proceedings of the National Academy of Sciences suggested that this environmental factor was not to blame for civil war in Africa. Instead, Dr Halvard Buhaug, from the Peace Research Institute Oslo, Norway, concluded that the conflict was linked to other factors such as high infant mortality, proximity to international borders and high local population density. Commenting on the latest research, he said: ‘I disagree with the sweeping conclusion (the authors) draw and believe that their strong statement about a general causal link between climate and conflict is unwarranted by the empirical analysis that they provide. I was surprised to see not a single reference to a real-world conflict that plausibly would not have occurred in the absence of observed climatic extremes. If the authors wish to claim a strong causal link, providing some form of case validation is critical.’
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UN IPCC Lead Author Dr. Richard Tol has ‘massive criticism’ for new paper — German newspaper Der Spiegel takes apart global warming/violence paper: Accuses ‘authors of gross errors and a distorted selection of data’ — ‘Global Warming: Study on Climate Change/War Met With Fierce Criticism’
Jürgen Scheffran, Professor for Climate Change and Security at the University of Hamburg and his colleagues evaluated 27 studies and found that 16 were statistically significant in showing that global warming increased the probability of violent conflict, but that 11 studies said they could actually have the opposite effect, i.e. decrease the likelihood of violent conflict. Eight of these papers were not even considered by Hsiang and his colleagues, Scheffran says.
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Finally Sociology Professor Nico Stehr and Hans von Storch also told Spiegel that the worst error in the Hsiang study was that it ignores man’s ability to adapt to weather and climate events. Hans von Storch says “they falsely assume that man’s reaction to climatic stimulations would be unchanged“. Another expert reminds us that man will be even better equipped in the future to adapt to changes than we are today.
Can a carbon tax prevent YOU from being MURDERED or RAPED?! UN IPCC’s Prof. Hsiang’s new study ‘could go a long way toward convincing people that climate change can directly affect their lives. We just need to make it all about us, and our unwillingness to get murdered’
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