...variability. Thus the observed increase could be largely due to this natural variability; alternatively this variability and other human factors could have...observations is not likely for a decade or more." In addition, the recent study by the National Academy of Sciences concluded that "there is a reasonable...

...magnitude as natural climate variability. Thus, the observed increase could be largely due to this natural variability; alternately, this variability...have offset a still larger human-induced greenhouse wanning. The unequivocal detection of the enhanced greenhouse effect from observations is not likely...

...models. Thus, the observed increase could be largely due to this natural variability; alternatively this variability and other human factors could have...from observations is not likely for a decade or more. Measurements from ice cores going back 160,000 years show that the Earth's temperature closely paralleled...

...variability. Thus the observed increase could be largely due to this natural variability; alternatively this variability and other human factors could have...from observations is not likely for a decade or more. There are also a number of significant new findings and conclusions which we summarize as follows:...

...variability. Thus the observed increase could be largely due to this natural variability; alternatively this variability and other human factors could have...from observations is not likely for a decade or more. There are also a number of significant new findings and conclusions which we summarize as follows:...

...variability, Thus the observed increase could be largely due to this natural variability; alternatively this variability and other human factors could have...from observations is not likely for a decade or more. There are also a number of significant new findings and conclusions which we summarize as follows:...

...variability. Thus, the observed increase could be largely due to this natural variability; alternatively this variability and other human factors could have...a still larger human-induced greenhouse warming". In addition, IPCC (1992) concluded that "the consistency between observations of global temperature...

...variability. Thus the observed increase could be largely due to this natural variability; alternatively this variability and other human factors could have...from observations is not likely for a decade or more. There are also a number of significant new findings and conclusions which we summarize as follows:...

...Thus, the observed temperature increase could be largely due to natural variability; alternatively, this variability and other human factors could have...greenhouse effect from observations is not likely fora decade or more. In 1985, according to estimates for the IPCC Working Group III, three-fourths...

...variability y; alternatively, this variability and other human factors (such as aerosol air pollution) could have offset a still larger human-induced greenhouse...from observations is not likely for a decade or more. 1 This scenario assumes that few steps are taken to reduce greenhouse gas emissions. The atmospheric...