Is CO2 really causing Climate Change?

Is CO2 really causing Climate Change?

2:45 | If the climate has changed before, could it be natural now? How can we use carbon-dioxide’s fingerprints to identify it as the culprit? And where does that detective’s accent come from?

Water vapor amplifies warming

Water vapor amplifies warming

5:27 | Keah Schuenemann’s lecture explains how carbon dioxide affects water vapor in our atmosphere and also how the two greenhouse gases interact to form a positive feedback loop.

The Little Ice Age

The Little Ice Age

5:42 | In this lecture, Andy Skuce explains what the so-called “little ice age” was and what caused it. Most importantly, natural factors coming out of the little ice age cannot explain our current global warming.

Confused decline

Confused decline

5:26 | Peter Jacobs explains climate proxies, which estimate temperatures in the Earth’s past. In particular, he looks at the divergence problem, where some tree-ring proxies diverge from recent instrumental measurements.

Future Ice Age

Future Ice Age

4:54 | Dana Nuccitelli looks at what caused ice ages in the past and explains why we don’t expect them to occur in the foreseeable future.

Climate science in the 1970s

Climate science in the 1970s

5:56 | What were climate scientists thinking and publishing in the 1970s, before there was empirical evidence that the globe was warming? Daniel Bedford explains.

Principles that models are built on

Principles that models are built on

4:43 | Dana Nuccitelli explains the principles that climate models are built on: fundamental physical laws. No one can know the future for certain, but these models allow us to make educated decisions looking forward.

Ancient CO2 levels

Ancient CO2 levels

5:48 | Observing the effects of ancient CO2 levels and their correlation to ancient climate change can inform us what to expect today.

The greenhouse effect

The greenhouse effect

4:32 | Mark Richardson takes us to the Reading University Atmospheric Observatory to explain how the greenhouse effect works. He concludes by busting the myth that the greenhouse effect violates the 2nd law of thermodynamics.

Taking up residence

Taking up residence

5:15 | Gavin Cawley explains the carbon cycle, how human activity is causing an increase of CO2 in our atmosphere, and uses bank accounts to show how we can know humans are increasing atmospheric CO2.

Reinforcing feedback

Reinforcing feedback

5:33 | Ice core records tell us global warming causes the ocean to emit more CO2. More atmospheric CO2 in-turn traps more heat, making this is a reinforcing feedback loop.

Measuring from space

Measuring from space

4:24 | Sarah Green explains how satellites monitor outgoing radiation to measure global warming. She concludes by busting the myth that CO2 must be unimportant in our atmosphere because it is only a trace gas.

Structure of the atmosphere

Structure of the atmosphere

4:50 | Mark Richardson examines one of the human fingerprints being observed in the structure of the atmosphere and debunks a myth about the elusive tropospheric hot spot.

Heat in the City

Heat in the City

6:09 | This video features Kevin Cowtan talking about urban heat and temperature records.

Wavy Jet Stream

Wavy Jet Stream

6:23 | Keah Schuenemann explains what the jet stream and the “polar vortex” effect it is having in the United States.

Consensus of Evidence

Consensus of Evidence

5:26 | This lecture introduces some “human fingerprints” of warming we observe in our climate system.

Consensus of Scientists

Consensus of Scientists

6:57 | This video covers several studies showing the high levels of agreement about anthropogenic global warming among scientists, and concludes by debunking the infamous “Global Warming Petition Project.”

Scientific method

Scientific method

6:01 | Climate change is real, so why the controversy and debate? Learn to make sense of the science and to respond to climate change denial.

How Plankton Blooms Absorb CO2

How Plankton Blooms Absorb CO2

44:13 | Dr. Amala Mahadevan explains the relationship between the mixing of warm and cold ocean water and the phytoplankton blooms. The phytoplankton are essential to the cycle of CO2 absorption that occurs in the world’s oceans.

NASA’s Earth Minute: Gas Problem

NASA’s Earth Minute: Gas Problem

1:42 | Greenhouse gases are vital to life on Earth, but the growing concentration of certain gases, such as carbon dioxide, is throwing the planet’s delicate balance out of whack.

NASA’s Earth Minute: Usual Suspects

NASA’s Earth Minute: Usual Suspects

1:30 | NASA’s ongoing Earth science missions, research and computer models help us better understand the long-term global changes occurring today through both natural and manmade causes.