The Science of Climate Change: Global and U.S. Perspectives

Basic Science on climate change:

  • Projections of future climate change suggest a global temperature increase of 1 to 6°C (2 to 10°F) from 1990 to 2100, with warming in most of the United States expected to be even higher.
  • Current scientific research shows that climate change will have major effects on precipitation, evapotranspiration, and runoff — and ultimately on the nation’s water supply
  • While the net impacts of a doubling of atmospheric CO2 concentrations on U.S. agriculture as a whole are likely to be small, the impacts are likely to vary considerably from region to region.
  • Climate change will lead to substantial sea-level rise along much of the U.S. coastline, due mostly to thermal expansion of the oceans.
  • The very real possibility exists that warming over this century will jeopardize the integrity of many terrestrial ecosystems and will pose a threat to our nation’s biodiversity.

The Wigley report provides more information on how climate is influenced by anthropogenic factors. You may download a pdf of the entire report by clicking on the report cover above, or read portions of the report in html by following the links in the “In This Section” box.