Written Testimony - The National Academies of Sciences
... least the last 1,000 years. This conclusion has subsequently been supported by an array
of evidence that includes both additional large-scale surface temperature reconstructions
and pronounced changes in a variety of local proxy indicators, such as melting on icecaps
and the retreat of glaciers arou ...
... Over the last hundred years the average
temperature over land has increased by more
than half a degree. Scientific opinion is that
the average temperature of the Earth has
risen by 0,7 ° C.
Hockey Sticks or Boomerangs? The Global Warming Debate as an
Lindzen exposes one such occurrence where CNN to reported
that it is unanimous among scientists that global warming is
happening and being caused by human activity. The document
was issued by the National Academy of Sciences and was
intended only to respond to questions about global w ...
Climate Changes During the Past Millennium
... Mann, M.E., Rutherford, S., Bradley, R.S., Hughes, M.K., Keimig, F.T., Optimal
Surface Temperature Reconstructions Using Terrestrial Borehole Data,
Journal of Geophysical Research, 2002 (in press)
... When carbon dioxide reacts with water, carbonic acid is formed.
This acid is dissolving the calcium carbonate that make up the
skeletons of corals.
Behind the Hockey Stick - Page Contact:
... in his University of Virginia office overlooking the
hills of Monticello, the home of Thomas Jefferson.
To construct the hockey-stick plot, Mann, Raymond S. Bradley of the University of Massachusetts
Amherst and Malcolm K. Hughes of the University of
Arizona analyzed paleoclimatic data sets such as ...
Temperatures from the Middle Pleistocene to the
... of fossil planktic foraminifera. The record is plotted relative to its mean because temperatures at lower latitude locations were greater than those at high-latitude locations, but all
show the same pattern and thus can be “stacked” to give one record of relative temperature.
In the rightmost part o ...
Climate Panel Cites
... Jonathan Lynn, said in a statement Monday. “It is therefore premature and could be misleading to attempt to draw conclusions
After winning the Nobel Peace Prize six years ago, the group became a political target for climate doubters, who helped identify
minor errors in the 2007 report. Thi ...
Global Warming Can Be Stopped, World Climate Experts Say John
... But given the immensity of the challenge, Arroyo said, the "luxury" to ignore any of the available options does not exist.
"We really need to tackle this problem from every angle we can," she said.
Daniel Kammen directs the Renewable and Appropriate Energy Laboratory at the University of California, ...
Tribnet.com - Opinion
... observation, "England's climate was warm enough in the 12th and 13th centuries to
support more than 50 vineyards," which she offers as evidence of unusual warmth
during medieval times.
She neglects to mention the evidence indicating unusually cold conditions in many
other regions at precisely the sa ...
Folie 1 - hvonstorch.de
... For the purpose of testing reconstruction
methods, it does not really matter how
„good“ the historical climate is reproduced
by a millennial simulation.
Such model data provide a laboratory to
test MBH, McMc and other questions.
17 Feb 2007
... One reason I elected to become a scientist is that it seemed to me that
scientists are in the reality business. Richard Alley, a lead author of the 2007
Fourth Assessment Report of the U.N.’s Intergovernmental Panel on Climate
Change (IPCC), Professor of Geosciences at Penn State University, and aut ...
2014 Was the Warmest Year Ever Recorded on Earth
... records, the National Oceanic and Atmospheric Administration, issued separate data
compilations on Friday that confirmed the 2014 record. A Japanese agency had
released preliminary information in early January showing 2014 as the warmest
The last scientific group that curates the world’s tempe ...
... this century, and likely at least the past millennium
•It is difficult to explain the recent surface warming in
terms of natural climate variability
•Recent surface warming is consistent with simulations of
the effects of anthropogenic influence on climate
Climate change: New report from the world`s leading
... European Environment Commissioner Stavros Dimas called for an urgent
start to international negotiations on a comprehensive new global climate
change agreement following today's publication of alarming scientific
evidence by the Intergovernmental Panel on Climate Change (IPCC). The
consensus report ...
Trump Transition Will be a Tsunami Washing Away Climate Corruption
... work with others to create the Galileo Movement, an organization that has
achieved the same impact as Friends of Science. Malcolm wanted to become
proactive, and as we communicated, he became aware that the real problem was in
the deliberate use of bureaucrats. He learned that Maurice Strong set up ...
The North Report was a 2006 report evaluating reconstructions of the temperature record of the past two millennia, providing an overview of the state of the science and the implications for understanding of global warming. It was produced by a National Research Council committee, chaired by Gerald North, at the request of Representative Sherwood Boehlert as chairman of the U.S. House of Representatives Committee on Science.These reconstructions had been dubbed ""hockey stick graphs"" after the 1999 reconstruction by Mann, Bradley and Hughes (MBH99), which used the methodology of their 1998 reconstruction covering 600 years (MBH98). A graph based on MBH99 was featured prominently in the 2001 IPCC Third Assessment Report (TAR), and became a focus of the global warming controversy over the 1997 Kyoto Protocol. It was disputed by various contrarians, and in the politicisation of this hockey stick controversy the New York Times of 14 February 2005 hailed a paper by businessman Stephen McIntyre and economist Ross McKitrick (MM05) as undermining the scientific consensus behind the Kyoto agreement. On 23 June 2005, Rep. Joe Barton, chairman of the House Committee on Energy and Commerce, with Ed Whitfield, Chairman of the Subcommittee on Oversight and Investigations, wrote joint letters referring to issues raised by the Wall Street Journal article, and demanding that Mann, Bradley and Hughes provide full records on their data and methods, finances and careers, information about grants provided to the institutions they had worked for, and the exact computer codes used to generate their results. Boehlert said this was a ""misguided and illegitimate investigation"" into something that should properly be under the jurisdiction of the Science Committee, and in November 2005 after Barton dismissed the offer of an independent investigation organised by the U.S. National Academy of Sciences, Boehlert requested the review, which became the North Report.The North Report went through a rigorous review process, and was published on 22 June 2006. It concluded ""with a high level of confidence that global mean surface temperature was higher during the last few decades of the 20th century than during any comparable period during the preceding four centuries"", justified by consistent evidence from a wide variety of geographically diverse proxies, but ""Less confidence can be placed in large-scale surface temperature reconstructions for the period from 900 to 1600"". It broadly agreed with the basic findings of the original MBH studies, which subsequently been supported by other reconstructions and proxy records, while emphasising uncertainties over earlier periods. The principal component analysis methodology that McIntyre and McKitrick had contested had a small tendency to bias results so was not recommended—but it had little influence on the final reconstructions, and other methods produced similar results.