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Environmental Variability and Climate Change

Description: The PAGES research community works toward improving our understanding of the Earth's changing environment. By placing current and future global changes in a long term perspective, they can be assessed relative to natural variability. Since the industrial revolution, the Earth System has become increasingly affected by human activities. Natural and human processes are woven into a complex tapestry of forcings, responses, feedbacks and consequences. Deciphering this complexity is essential as we plan for the future. Paleoenvironmental research is the only way to investigate Earth System processes that operate on timescales longer than the period of instrumental records.
Date: 2001
Creator: Past Global Changes (PAGES)
Partner: UNT Libraries

Clouds in the Balance

Description: This feature article provides a summary of study about the role of clouds in the balance. Until recently, scientists were uncertain whether clouds had an overall net cooling or heating effect on the Earth's climate. But recent studies show that, in the tropics, a "near cancellation" between shortwave cooling and longwave warming exists, which indicates that the amount of incoming radiant energy is roughly equal to the amount of outgoing radiation. However, small changes in tropical cloudiness can disrupt this precarious balance.
Date: October 11, 2001
Creator: Schmidt, Laurie J.
Partner: UNT Libraries

A Curious Pacific Wave

Description: This brief article discusses about a massive swell of water that was buffeting South America. Kelvin waves are warm bumps in the Pacific Ocean, characterized by a gentle yet massive swell of warm water. Usually not much happens when a Kelvin wave arrives -- beach combers experience a bit of extra rain, perhaps, and slightly warmer surf. Nevertheless, scientists pay careful attention to them because these gentle waves occasionally herald something far more powerful: the next El Niño.
Date: March 5, 2002
Creator: Science@NASA
Partner: UNT Libraries

NOAA Sets the El Niño Prediction Straight

Description: El Niño is an abnormal warming of the ocean temperatures across the eastern tropical Pacific that affects weather around the globe. El Niño episodes usually occur approximately every four-five years. NOAA researchers and scientists are presently monitoring the formation of a possible weak El Niño and predict that the United States could experience very weak-to-marginal impacts late winter to early spring 2002.
Date: September 7, 2001
Creator: NOAA News
Partner: UNT Libraries

Global Change and the Earth System: A planet under pressure

Description: The PAGES research community works toward improving our understanding of the Earth's changing environment. By placing current and future global changes in a long term perspective, they can be assessed relative to natural variability. Since the industrial revolution, the Earth System has become increasingly affected by human activities. Natural and human processes are woven into a complex tapestry of forcings, responses, feedbacks and consequences. Deciphering this complexity is essential as we plan for the future. Paleoenvironmental research is the only way to investigate Earth System processes that operate on timescales longer than the period of instrumental records.
Date: 2001
Creator: Global Environmental Change Programmes
Partner: UNT Libraries

[News Clip: Brazil Flood]

Description: Video footage from the NBC 5/KXAS station in Fort Worth, Texas, to accompany a news story about flooding in Brazil. This story was produced for the 10:00 P.M. news broadcast.
Date: 1998-02-18T22:00:00
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections