Is there any merit to the studies that show that historical CO2 levels lag behind temperature, and not lead them?
Yes,

Is there any merit to the studies that show that historical CO2 levels lag behind temperature, and not lead them?
Yes, there's merit to those studies, says Peter Hildebrand, Director of the Earth Science Division at NASA's Goddard Space Flight Center, responding to a question from Twitter (https://twitter.com/Seth_b_clark/stat...).

In the pre-industrial age, the CO2 response to temperature was that the temperature would go up and CO2 would go up. Or if the temperature went down, CO2 would go down. Because when the temperature rose, the whole biosphere revved up and emitted CO2. So we understand that process.

In the post-industrial age, the opposite is true. Increasing CO2 in the atmosphere is leading to increased temperature. So two different things happened, one pre-industrial, where temperature was driving the CO2, and post-industrial, where CO2 was driving temperature. Which means a completely different physical-biological process is going on.Published on Sep 24, 2013

For more about Ask A Climate Scientist, go here: http://www.youtube.com/watch?v=49Lu1d...

Is there a pause in global warming?

This question was posed to Jet Propulsion Laboratory scientist

Is there a pause in global warming?

This question was posed to Jet Propulsion Laboratory scientist Josh Willis as part of NASA's Ask A Climate Scientist campaign.

Josh gets asked a lot if there has been a pause in global warming, because temperatures aren't increasing as fast as they were a decade ago. No, he says, global warming is definitely still increasing (http://climate.nasa.gov/key_indicator...). We see more heat being trapped in the oceans, and sea levels are rising. Look at the sea level record for the last decade (http://climate.nasa.gov/key_indicator...). It's going up like gangbusters, hasn't slowed down.

There's not really a pause in global warming. Sometimes there's natural fluctuations and we warm up a little faster in one decade and a little slower in another decade, but global warming, human-caused climate change? Josh says, "that's definitely going right on up in there. We haven't slowed down at all."

See more of NASA's answers to your questions on climate science (http://bit.ly/1b7rSdL).

This video uses animation, graphics, and video clips to illustrate and explain each of the "flow" and "storage" processes in

This video uses animation, graphics, and video clips to illustrate and explain each of the "flow" and "storage" processes in the Hydrologic Cycle, more commonly known as the Water Cycle: precipitation, interception, runoff, infiltration, percolation, groundwater discharge, evaporation, transpiration, evapotranspiration, and condensation.

Published on Jul 12, 2013

Physicist Lee Smolin talks about how the scientific community works: as he puts it, "we fight and

Physicist Lee Smolin talks about how the scientific community works: as he puts it, "we fight and argue as hard as we can," but everyone accepts that the next generation of scientists will decide who's right. And, he says, that's how democracy works, too. More of his lectures on his Website here.

Leroy Little Bear delivers the Spring 2011 Simon Ortiz and Labriola Center Lecture on Indigenous Land, Culture and Community.
Recorded March 24, 2011 at the Heard Museum in Phoenix, Arizona

Leroy Little Bear delivers the Spring 2011 Simon Ortiz and Labriola Center Lecture on Indigenous Land, Culture and Community.
Recorded March 24, 2011 at the Heard Museum in Phoenix, Arizona
Science depends on who is doing the defining, what we now accept as science, leaves out a lot of science.

Leroy Little Bear is a member of the Blood Tribe of the Blackfoot Confederacy. Leroy is the former Director of the American Indian Program at Harvard University and professor emeritus of Native Studies at the University of Lethbridge where he was department chair for 25 years. He has served as a legal and constitutional advisor to the Assembly of First Nations and has served on many influential committees, commissions, and boards dealing with First Nations issues. 

What Retractions Tell Us About Scientific Transparency by the journalist Ivan Oransky. His blog, Retraction Watch is here. 

Parts of a lecture by M. Jahi Chappell, Ph.D., Assistant Professor, Environmental Science and Justice at Washington State University, Vancouver to the Social Sustainability

Parts of a lecture by M. Jahi Chappell, Ph.D., Assistant Professor, Environmental Science and Justice at Washington State University, Vancouver to the Social Sustainability Colloquium at Portland State University, January 27, 2012. Entitled, Ecological Sustainability, Food, and Human Rights: The Necessity of 'Action Ecology' Dr. Chappell discusses the role of scientists as citizens and credible advocates. He suggests both are appropriate and when coupled with participation and outreach to the community, especially in the University setting, are effective at changing the status quo.

Videotaped by Ruth Ann Barrett, Sustainability Advocate, and founder of www.EarthSayers.tv, voices of sustainability.