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Exam3_spring09_v1_online
Exam3_spring09_v1_online

... 20. Global average surface temperatures from 1995 through today have been warmer than any other 14 year period since 1860. This statement is _______________ . (a) almost certainly true (b) believed to be true by many people, but it is difficult to back up with evidence (c) not true; It is a scare ta ...
Chapter 20
Chapter 20

... • Atmospheric concentration of CO2, a principal greenhouse gas, has increased since the mid19th century (the Industrial Revolution). Rise has been especially rapid since the 1950s. • It is a known fact that humans emit carbon dioxide into the atmosphere due to transportation and industrial processes ...
UEA
UEA

... Plus late contribution from Ari Venäläinen: based on his extremes work in Finland – my fault I should have asked his group to become involved – welcome aboard Ari et al.! Marco – anything on forest fires for the next phase? nothing on flood yet (PAS), I’ll do something on this year’s UK flood ...
Putting the Heat on Tropical Animals
Putting the Heat on Tropical Animals

... throughout the year than do temperate organAll these predictions are for terrestrial isms, tropical animals might be expected to habitats, and patterns may differ elsewhere. have greater heat tolerance. Surprisingly, that is In marine habitats, for example, thermal often not the case: Heat tolerance ...
No Slide Title
No Slide Title

... - Climate extremes are hazardous.  Communities must develop resilience to withstand the hazards of cyclic climate variability and extremes.  There are many uncertainties and unknowns as to the causes of climate variability and long term change - we should not succumb to mysticism and illusion. ...
LESSONS FROM PAST GLOBAL CLIMATE CHANGES
LESSONS FROM PAST GLOBAL CLIMATE CHANGES

... The Vikings colonized southern Greenland in 985 AD during the Medieval Warm Period (Lassen et al., 2004) when milder climates allowed favorable open-ocean conditions for navigation and fishing. This was "close to the maximum Medieval warming recorded in the GISP2 ice core at 975 AD (Stuiver et al., ...
48. Global Warming and Climate Change
48. Global Warming and Climate Change

... research scientist James Hansen testified in a joint House-Senate hearing that there was a ‘‘cause and effect relationship’’ between ‘‘the current climate and human alteration of the atmosphere.’’ Since that landmark testimony, there have been remarkable developments in climate science, many of whic ...
IPCC - CGD
IPCC - CGD

... handle them well by defending its processes. The report itself has been scrutinized along with all of the comments and responses to the comments. Two minor errors have been found: both in WG II, none in WG I. -Himalayan glaciers melt (correct in WG I) -Area of Netherlands below sea level None of all ...
Global Warming and Climate Change
Global Warming and Climate Change

...  Increased concentration of greenhouse gases in the atmosphere leads to warming at the Earth’s surface.  Carbon dioxide build up is particularly serious because it remains in the atmosphere for decades to centuries.  Build up of aerosols, anthropogenic or natural, inhibit incoming solar radiation ...
Activity 2.1: Historical Climate Cycles
Activity 2.1: Historical Climate Cycles

... Two degrees Celsius of warming would make Earth much warmer than during the Eemian, and would move Earth closer to Pliocene-like conditions, when sea level was in the range of 25 meters higher than today, Hansen said. In using Earth's climate history to learn more about the level of sensitivity that ...
Are Humans Responsible for Global Warming?
Are Humans Responsible for Global Warming?

... produced the so-called “hockey stick” graphic that contributed to this conclusion in the 2001 assessment of the Intergovernmental Panel on Climate Change: “The…'Medieval Warm Period' appear(s) to have limited utility in describing trends in hemispheric or global mean temperature changes in past cent ...
AGU - Global Heat Flow Database
AGU - Global Heat Flow Database

... surface temperature. Consequently, borehole T-z measurements at multi-year intervals spanning time periods when solar radiation, soil temperatures, and SAT have been recorded should enable comparison of the thermal energy stored in the ground to these quantities. If coherence between energy storage, ...
Temperature anomaly ( o C)
Temperature anomaly ( o C)

... (Range of median values) ...
Questioning the Global Warming Science II: An Updated
Questioning the Global Warming Science II: An Updated

... The last paper by Craig Loehle uses 18 series of proxies other than tree rings like borehole temperatures, Conroy Lake pollen, Chesapeake Bay Mg/Ca etc with each series having at least 20 dates over the 2000-year period. Loehle also points out several problems with tree –ring data like ring width en ...
Science says... - Agricultural Policy Analysis Center
Science says... - Agricultural Policy Analysis Center

... Carey goes on to write, “Many journals have also started to insist on what is known as preregistration. When a researcher preregisters a study, he or she spells out the hypothesis and how it is going to be tested. Doing this upfront is a powerful check against moving the goal posts on a study—that i ...
Human contribution to Global Warming?
Human contribution to Global Warming?

... Summary of peer reviewed research ...
Is the global warming a biggest hoax of the 21st century
Is the global warming a biggest hoax of the 21st century

... The third theory explains the warming by the increase of greenhouse gases and clouds in the atmosphere. The Holli Riebeek NASA (2007) says that “if there were no greenhouse gases or clouds in the atmosphere, the Earth’s average surface temperature would be a very chilly -18°C (0°F) instead of the co ...
Fall07_Exam3
Fall07_Exam3

... (d) volcanic eruptions which eject massive amounts of aerosols into the atmosphere 18. This was probably the warmest period in the last 15,000 years. During this period, the global average temperature was probably warmer than it is today. (a) Holocene Maximum (c) Little Ice Age (b) Medieval Warm Per ...
PowerPoint Slideshow
PowerPoint Slideshow

... greenhouse effect from observations is not likely for a decade or more. - IPCC, 1990 The balance of evidence suggests a discernable human influence on global climate. - IPCC 1995 ...
Global Warming
Global Warming

... predictions much less secure than global average  Precipitation predictions much less secure than temperature  Impacts on ecosystems, agriculture, etc only in general terms ...
Pseudoscientific elements in climate change research
Pseudoscientific elements in climate change research

... vulnerable citizens adapt to conditions that lie ahead. Attempts to prevent global climate change from occurring are ultimately futile, and constitute a tragic misallocation of resources that would be better spent on humanity’s real and pressing problems. 3. Consensus? ...
CLIMATE_NRE_480_L02_Intro_Science_Response_20160114
CLIMATE_NRE_480_L02_Intro_Science_Response_20160114

... observe that with virtual certainty – The average global temperature of the Earth’s surface has increased due to the addition of gases into the atmosphere that hold heat close to the surface. The increase in greenhouse gases is due to human activities, ...
here - Hot Topic
here - Hot Topic

... If you lived in New Zealand 50 million years ago, you would have been able to enjoy a hot swim in the sea all year round, scientists have found. The early Eocene, around 50 million years ago, has long been recognised as a time of pronounced global warming. New Zealand was vastly different then, with ...
Climate Change - Cloudfront.net
Climate Change - Cloudfront.net

... The next few slides show projections of future temperature based on the IPCC scenarios: C3, B1, A1B, A2. Each scenario is slightly different, and less optimistic. In the C3 storyline, CO2 concentrations are held at the same level as they were in 2000. The projection indicates that the world will co ...
Presentation
Presentation

... most objective sources I have are people on my staff who tell me what's happening in the world.” Fox interview 23-9-2003 1 The ...
< 1 ... 55 56 57 58 59 60 61 62 63 ... 73 >

North Report

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.
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