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100			_93927 _aKarl, Thomas R.
245			_aThe impact of decadal fluctuations in mean precipitation and temperature on runoff: _ba sensitivity study over the United States / _cThomas R. Karl and William E. Riebsame
300			_app. 423-447
500			_aClimatic Change (1989), vol.15
500			_aThe nature of climate variability is such that decadal fluctuations in average temperature (up to 1 °C annually or 2 °C seasonally) and precipitation (approximately 10% annually), have occurred in most areas of the United States during the modern climate record (the last 60 years). The impact of these fluctuations on runoff was investigated, using data from 82 streams across the United States that had minimal human interference in natural flows. The effects of recent temperature fluctuations on streamflow are minimal, but the impact of relatively small fluctuations in precipitation (about 10%) are often amplified by a factor of two or more, depending on basin and climate characteristics. This result is particularly significant with respect to predicted changes in temperature due to the greenhouse effect. It appears that without reliable predictions of precipitation changes across drainage basins, little confidence can be placed in hypothesized effects of the warming on annual runoff.
942			_2ddc _cSEPA
999			_c3889 _d3889