Intergovernmental Panel on Climate Change (IPCC) Third Assessment Report: Hearing Before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Seventh Congress, First Session, May 1, 2001, Volume 4U.S. Government Printing Office, 2004 - 87 pages |
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Page 9
... region and season . Sun and volcanoes are natural forcing factors . One characteristic stands out from the assessment of the forcings , which is that the estimate and the level of scientific un- derstanding of greenhouse gases forcing ...
... region and season . Sun and volcanoes are natural forcing factors . One characteristic stands out from the assessment of the forcings , which is that the estimate and the level of scientific un- derstanding of greenhouse gases forcing ...
Page 10
... regions , decrease in the amount of snow the rise in the global average sea level by 4 to 8 inches . What are the causes of the observed warming ? To analyze this issue , IPCC resorts to model simulations . Based on analysis of both the ...
... regions , decrease in the amount of snow the rise in the global average sea level by 4 to 8 inches . What are the causes of the observed warming ? To analyze this issue , IPCC resorts to model simulations . Based on analysis of both the ...
Page 12
... region . Some aerosol types act in a sense opposite to the greenhouse gases and cause a negative forcing or cooling ... regions . Snow cover and ice extent have decreased . The global - average sea level has risen between 4 and 8 inches ...
... region . Some aerosol types act in a sense opposite to the greenhouse gases and cause a negative forcing or cooling ... regions . Snow cover and ice extent have decreased . The global - average sea level has risen between 4 and 8 inches ...
Page 14
... region . These uncertainties increase in more distant times and are always much larger than in the instrumental record due to the use of relatively sparse proxy data . Nevertheless the rate and duration of warming of the 20th century ...
... region . These uncertainties increase in more distant times and are always much larger than in the instrumental record due to the use of relatively sparse proxy data . Nevertheless the rate and duration of warming of the 20th century ...
Page 19
... region or particular time period that led them to these conclusions . This , Mr. Chairman , is why the work of the IPCC is so important . Some nations have sponsored and will continue to sponsor studies that may show , quite correctly ...
... region or particular time period that led them to these conclusions . This , Mr. Chairman , is why the work of the IPCC is so important . Some nations have sponsored and will continue to sponsor studies that may show , quite correctly ...
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21st century achieve aerosols air pollution alternative scenario Arctic assessment black carbon business-as-usual carbon dioxide Chairman Chapter climate change climate forcing climate models climate sensitivity climate system CO₂ CO2 emissions coal Committee concentrations coordinating lead authors decades developing countries direct costs economic effects emission scenarios emissions trading energy efficiency energy sources estimates feedback Figure forcing agents fossil fuels future climate global climate global warming greenhouse gas emissions greenhouse gases growth rate Hansen heat impacts improved increase Intergovernmental Panel IPCC report issue Kyoto Protocol Lindzen long-term mate change McCarthy measurements methane model simulations National natural non-CO₂ observations ocean options Panel on Climate past potential projected question radiative forcing RAMASWAMY range recent reduce regions response SATHAYE scientific scientists Senator BROWNBACK stratospheric studies Summary for Policymakers surface temperature technologies testimony Thank tion tropical tropospheric ozone uncertainties understanding variability W/m²