Global Climate Change Uncertainties

Unresolved questions about Earth's climateExtreme Ultraviolet Imaging Telescope (EIT) image of the sun with a huge, handle-shaped prominence, taken in 1999. While there is no evidence of a change trend in solar output over the past half century, long-term changes in solar output are not well-understood.This website presents a data-rich view of climate and a discussion of how that data fits

Global Climate Change Evidence

Climate change: How do we know?The Earth's climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about seven thousand years ago, marking the beginning of the modern climate era —and of human civilization. Most of these changes are attributed to the very small changes in the Earth

Global Climate Change Causes

The greenhouse effectA layer of greenhouse gases – primarily carbon dioxide, methane and nitrous oxide – act as a thermal blanket for the Earth, absorbing heat and warming the surface to a life-supporting average of 59 degrees Fahrenheit (15 degrees Celsius).Most scientists agree the main cause of the current global warming trend is human expansion of the "greenhouse effect" -- warming that

Global Climate Change CURRENT-MISSIONS

EARTH SCIENCE MISSIONSCURRENTPROPOSED The following is an alphabetical list of Earth science satellites and instruments developed and managed by the Jet Propulsion Laboratory. For a complete list of all NASA Earth-science missions, visit NASA Science: Earth.

Global Climate Change PROPOSED-MISSIONS

EARTH SCIENCE MISSIONS CURRENTPROPOSEDThe Decadal Survey will generate consensus recommendations from the Earth and environmental science and the applications communities regarding a systems approach to space-based Earth Science observations. The following is an chronological list of Earth science satellites and instruments proposed by JPL for consideration by the Decadal Survey.