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...

The scientific consensus is that human activity is cooking the planet. Does President-elect Trump calling it a hoax embolden others in denial?

Many people are concerned

The scientific consensus is that human activity is cooking the planet. Does President-elect Trump calling it a hoax embolden others in denial?

Many people are concerned about the climate and deeply anxious that the new administration will double down on fossil fuels and erase recent climate progress. Ten years ago Republicans John McCain and Lindsay Graham supported fighting climate change. But the party has changed it’s tune in recent years.

Climate scientist Michael Mann and Pulitzer-Prize winning cartoonist Tom Toles take a satirical look at how the issue became so divisive. Cristine Russell is a veteran science journalist with deep knowledge about the politicization of science. Renee Lertzman gets to the psychology of it all. Are we all in denial to some extent? Can better communication help us expand common ground and move on to solutions? Join us for a fun and informative look at manufactured doubt and genuine skepticism.

Examined Life pulls philosophy out of academic journals and classrooms, and puts it back on the streets. In Examined Life, filmmaker Astra Taylor accompanies some of today's most influential

Examined Life pulls philosophy out of academic journals and classrooms, and puts it back on the streets. In Examined Life, filmmaker Astra Taylor accompanies some of today's most influential thinkers on a series of unique excursions through places and spaces that hold particular resonance for them and their ideas. Peter Singer, Judith Butler, Cornel West, Kwame Appiah and in this segment, Avital Ronel, literary critic, philosopher and feminist.

Must see.

This is Portland's oldest surviving brick commercial building. The Hallock & McMillan Building was built in 1857. It is located

This is Portland's oldest surviving brick commercial building. The Hallock & McMillan Building was built in 1857. It is located at 237 SW Naito Parkway in Portland, Oregon. The original architect was Absalom B. Hallock. The original cast-iron manufacturer was Phoenix Iron Works (San Francisco).

Understanding consumer behavior and attitudes regarding sustainability and health/wellness is an ongoing process. Listen to perspectives from Peter

Understanding consumer behavior and attitudes regarding sustainability and health/wellness is an ongoing process. Listen to perspectives from Peter Salmon of Moxie Design in New Zealand, Guy Champniss of Havas Media, and Chris Coulter of Globescan.

Talks at Google.

Peter Kohler, founder of The Plastic Tide project, and Dr. Stefan Leutenegger, Lecturer in Robotics at Imperial College London, discuss how the ocean is under siege from

Talks at Google.

Peter Kohler, founder of The Plastic Tide project, and Dr. Stefan Leutenegger, Lecturer in Robotics at Imperial College London, discuss how the ocean is under siege from an ever-increasing tide of waste, and how technology like machine learning and drones can help us fix the issue.

Threatening not only a vital economic resource worth an estimated $5 trillion a year but also humanity’s very own life support. The Plastic Tide initiative was started almost two years ago, with the aim of quantifying the problem using drone imagery of UK beaches and beyond: raised awareness and precise data will hopefully drive solutions at societal, political, and technological levels.

They have collected a huge database of drone imagery around UK beaches last year, and a prototype algorithm developed already combines a deep-learning-based plastic detection scheme in the images with geo-referenced mapping. The speakers will show early results and present related research in the space of localization, mapping, and drone flight; and furthermore, sketch the way forward to limit the plastic tide swamping our oceans.

Learn more here.