Which is what can be seen in the NASA solar irradiance measurements. These two chart pairs from pages 5 and 7 of the above report show that solar irradiance is not responsible for the sharp increase in observed world temperatures over the last few decades. In the second pair of graphs, the sunspot cycle has been subtracted out and temperature data has been smoothed. The red line in the irradiance chart shows the resultant best fit while the other lines reflect various damping factors.
He obtained a B. He participated in the NASA graduate traineeship from to and, at the same time, between andhe was a visiting student at the Institute of Astrophysics at the University of Kyoto and in the Department of Astronomy at the University of Tokyo.
He then began work at the Goddard Institute for Space Studies in He later applied and refined these models to understand the Earth's atmosphereand in particular, the effects that aerosols and trace gases have on Earth's climate.
His development and use of global climate models has contributed to the further understanding of the Earth's climate. In his first book, Storms of My Grandchildrenwas published.
Hansen is representing his granddaughter as well as "future generations" as plaintiffs in the Juliana v. United States lawsuit, which is suing the United States government and some of its executive branch's positions for not protecting a stable climate system.
Research and publications[ edit ] As a college student at the University of IowaHansen was attracted to science and the research done by James Van Allen's space science program in the physics and astronomy department. A decade later, his focus shifted to planetary research that involved trying to understand the climate change on earth that will result from anthropogenic changes of the atmospheric composition.
Hansen has stated that one of his research interests is radiative transfer in planetary atmospheres, especially the interpretation of remote sensing of the Earth's atmosphere and surface from satellites. Because of the ability of satellites to monitor the entire globe, they may be one of the most effective ways to monitor and study global change.
His other interests include the development of global circulation models to help understand the observed climate trends, and diagnosing human impacts on climate. The thickness of the atmosphere initially made it difficult to determine why the surface was so hot.
In the late s and early s, following his Ph. Venus has a high brightness temperature in the radio frequencies compared to the infrared.
He proposed that the hot surface was the result of aerosols trapping the internal energy of the planet. He looked at the near-infrared reflectivity of ice clouds, compared them to observations of Venus, and found that they qualitatively agreed.
Hansen and Hovenier used the polarization of sunlight reflected from the planet to establish that the clouds were spherical and had a refractive index and cloud drop effective radius which eliminated all of the proposed cloud types except sulfuric acid.
They found that the visible clouds are a diffuse haze rather than a thick cloud, confirming the same results obtained from transits across the sun. Hansen collaborated with Larry Travis and other colleagues in a Science article that reported on the development and variability of clouds in the ultraviolet spectrum.
They conclude that there are at least three different cloud materials that contribute to the images: Above the cloud layer was a layer of submicrometre haze.
These surface stations are located around the world, and are used to derive a global temperature. Hansen and his co-author analyzed the surface air temperature at meteorological stations focusing on the years from to Temperatures for stations closer together than kilometers were shown to be highly correlated, especially in the mid-latitudes, providing a way to combine the station data to provide accurate long-term variations.
They conclude that global mean temperatures can be determined even though meteorological stations are typically in the Northern hemisphere and confined to continental regions. Warming in the past century was found to be 0. The two warmest years were and There was speculation that this would cause the next couple years to be cooler because of the large serial correlation in the global temperatures.
Bassett and Lin found the statistical odds of a new temperature record to be small. In spite of this, the United States had seen a smaller degree of warming, and a region in the eastern U. It incorporated corrections due to the following reasons: Evidence was found of local urban warming in urban, suburban and small-town records.Type or paste a DOI name into the text box.
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Send questions or comments to doi. “The Great Global Warming Swindle” (DVD/video/movie) is a pseudo-documentary in which British television producer Martin Durkin has fraudulently misrepresented both the data involved and scientists who have researched global climate.
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The Medieval Warm Period, of which the proponents of Anthropogenic Global Warming don't want you to be aware, was a period in which agriculture flourished, helping Europe emerge from the Dark Ages.
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