Can Human-Caused Change Be Distinguished From Natural Caused Climate Change?

Drought From Warming

If global warming is caused by humans and that cause has a signature that scientists can point to in the debate, then the scales tip further for increased global action. Jeff Severinghaus, a climate researcher at the Scripps Institution of Oceanography in La Jolla, Calif says his new study may show such a signature.

Are human-caused and natural global warming different? Study says yes.

CHRISTIAN SCIENCE MONITOR - by Pete Spotts. January 31, 2013 .

A study suggests that human-caused and natural global warming episodes affect rainfall rates differently. The finding could help scientists better forecast what's ahead.

Human-triggered climate warming appears to leave a unique fingerprint on global rainfall rates compared with natural warming, according to a new study.

While rainfall rates increase whether the long-term warming trend is natural or not, the rate of increase appears to be higher during natural warming trends.

The result might help resolve a long-standing discrepancy between changes in rainfall projected in global climate models and changes projected by studying the historical record, researchers say.

The study suggests that "carbon dioxide has a fundamentally different mode of warming than natural climate change" – one that leaves a unique signature on rainfall rates, says Jeff Severinghaus, a climate researcher at the Scripps Institution of Oceanography in La Jolla, Calif. While the effect is most pronounced the the Pacific basin, the work "is about something more fundamental.... Natural and human-caused climate change really produce different effects."

Continue Reading the Article...

Warmer earth will have less rain, not more: study

AFP - January 31, 2013

Climate scientists say they have found evidence to back predictions for a future with lower average rainfall, even though Earth's past warming episodes had led to more precipitation, not less.

Writing in the journal Nature, researchers said they had found proof that global warming caused by man's greenhouse-gas emissions has a different effect on rainfall than warming caused by increased solar radiation.

Warming induced by carbon emissions is expected to accompany a rise in droughts in the future, they said.


 Get The Latest From InnerSelf


This runs contrary to experience during the so-called Medieval Warm Period, from 1000 to 1250 AD, when Earth was hotter than today as a result of solar heating - but also wetter.

Scientists have long battled to understand the apparent contradiction.

Continue Reading the Article...


Recommended Books:

Yellowstone's Wildlife in Transition

Yellowstone's Wildlife in TransitionOver thirty experts detect worrying signs of a system under strain. They identify three overriding stressors: invasive species, private-sector development of unprotected lands, and a warming climate. Their concluding recommendations will shape the twenty-first-century discussion over how to confront these challenges, not only in American parks but for conservation areas worldwide. Highly readable and fully illustrated.

For more info or to order "Yellowstone's Wildlife in Transition" on Amazon.

The Energy Glut: Climate Change and the Politics of Fatness

The Energy Glut: Climate Change and the Politics of Fatnessby Ian Roberts. Expertly tells the story of energy in society, and places 'fatness' next to climate change as manifestations of the same fundamental planetary malaise. This exciting book argues that the pulse of fossil fuel energy not only started the process of catastrophic climate change, but also propelled the average human weight distribution upwards. It offers and appraises for the reader a set of personal and political de-carbonising strategies.

For more info or to order "The Energy Glut" on Amazon.

Last Stand: Ted Turner's Quest to Save a Troubled Planet

Last Stand: Ted Turner's Quest to Save a Troubled Planet by Todd Wilkinson and Ted Turner. Entrepreneur and media mogul Ted Turner calls global warming the most dire threat facing humanity, and says that the tycoons of the future will be minted in the development of green, alternative renewable energy. Through Ted Turner's eyes, we consider another way of thinking about the environment, our obligations to help others in need, and the grave challenges threatening the survival of civilization.

For more info or to order "Last Stand: Ted Turner's Quest..." on Amazon.


enafarzh-CNzh-TWnltlfifrdehiiditjakomsnofaptruessvtrvi

follow InnerSelf on

facebook-icontwitter-iconrss-icon

 Get The Latest By Email

{emailcloak=off}