On almost all time scales,
natural changes in greenhouse gas concentrations appear to affect climate.
Not exact matches
Taking factors such as sea surface temperature,
greenhouse gases and
natural aerosol particles into consideration, the researchers determined that
changes in the
concentration of black carbon could be the primary driving force behind the observed alterations to the hydrological cycle
in the region.
Non-polar glacial ice holds a wealth of information about past
changes in climate, the environment and especially atmospheric composition, such as variations
in temperature, atmospheric
concentrations of
greenhouse gases and emissions of
natural aerosols or human - made pollutants... The glaciers therefore hold the memory of former climates and help to predict future environmental
changes.
In particular, the authors find fault with IPCC's conclusions relating to human activities being the primary cause of recent global warming, claiming, contrary to significant evidence that they tend to ignore, that the comparatively small influences of natural changes in solar radiation are dominating the influences of the much larger effects of changes in the atmospheric greenhouse gas concentrations on the global energy balanc
In particular, the authors find fault with IPCC's conclusions relating to human activities being the primary cause of recent global warming, claiming, contrary to significant evidence that they tend to ignore, that the comparatively small influences of
natural changes in solar radiation are dominating the influences of the much larger effects of changes in the atmospheric greenhouse gas concentrations on the global energy balanc
in solar radiation are dominating the influences of the much larger effects of
changes in the atmospheric greenhouse gas concentrations on the global energy balanc
in the atmospheric
greenhouse gas concentrations on the global energy balance.
Based on an extensive literature review, we suggest that (1) climate warming occurs with great uncertainty
in the magnitude of the temperature increase; (2) both human activities and
natural forces contribute to climate
change, but their relative contributions are difficult to quantify; and (3) the dominant role of the increase in the atmospheric concentration of greenhouse gases (including CO2) in the global warming claimed by the Intergovernmental Panel on Climate Change (IPCC) is questioned by the scientific communities because of large uncertainties in the mechanisms of natural factors and anthropogenic activities and in the sources of the increased atmospheric CO2 concentr
change, but their relative contributions are difficult to quantify; and (3) the dominant role of the increase
in the atmospheric
concentration of
greenhouse gases (including CO2)
in the global warming claimed by the Intergovernmental Panel on Climate
Change (IPCC) is questioned by the scientific communities because of large uncertainties in the mechanisms of natural factors and anthropogenic activities and in the sources of the increased atmospheric CO2 concentr
Change (IPCC) is questioned by the scientific communities because of large uncertainties
in the mechanisms of
natural factors and anthropogenic activities and
in the sources of the increased atmospheric CO2
concentration.
Both of these effects, along with
changes in natural variables must be examined explicitly by efforts to understand climate
change and devise policy that complies with the objective of Article 2 of the 1992 United Nations Framework Convention on Climate Change to stabilize «greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference in the climate system.&
change and devise policy that complies with the objective of Article 2 of the 1992 United Nations Framework Convention on Climate
Change to stabilize «greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference in the climate system.&
Change to stabilize «
greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference
in the climate system.»
Over the next decade,
changes in climate are expected to be due to a combination of anthropogenic
changes in atmospheric
greenhouse -
gas and aerosol
concentrations;
natural variations
in volcanic and solar activity, and
natural, unforced internal variability.