Earth’s changing climate the great courses 8 gas laws


In 2007 the Intergovernmental Panel on Climate Change concluded that warming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising global mean sea level. Representing youtube gas pedal dance a consensus of hundreds of scientists, the report went on to note that human activity is very likely the cause.

You will also explore the physical mechanisms behind these changes and their connections to the increasing concentration of greenhouse gases in the atmosphere since the start of the Industrial Revolution. And you will look at the techniques for projecting future climates, along with the options for switching to alternative energy technologies to avoid the most disruptive scenarios that gas city indiana zip code now seem possible.

Earth’s Changing Climate addresses only scientific issues and makes no policy recommendations. Instead, this course is designed to serve as your personal scientific briefing to equip you to engage knowledgeably in one of the most important environmental issues of our time. In Lectures 1–6 you will focus on the scientific basis of climate; then electricity bill cost per unit in Lectures 7–12 you will come to understand the human role in climate change and explore projections of future climate.

Professor Richard Wolfson is no stranger to this subject. A physicist who has written and taught extensively about climate change, in 1996 he taped an earlier course for The Teaching Company titled, Energy and Climate: Science for Citizens in the Age of Global Warming. Professor Wolfson’s new course is completely updated and represents the latest research and analysis in this fast-changing field.

A master at making difficult concepts understandable, Dr. Wolfson’s other Teaching Company 9game courses are Physics in Your Life, hailed by Library Journal as a wonderful series of lectures that make learning physics fun and interesting, and Einstein’s Relativity and the Quantum Revolution, which one listener said was as exciting as a suspense thriller!

Like many scientific problems, the gradual assembly of a detailed picture of past, present, and future climates has involved creative detective work. For example, scientists traditionally test their theories by changing gas giants different variables, but this has not been possible with theories about climate change on Earth for two reasons: It’s unwise to transform the planet just to see what will happen, and there are not multiple Earths to serve as test subjects.

Using such clues, scientists are able to connect the 0.65°C rise in average global temperature since the start of the 20th century with the increase electricity recruitment 2015 in atmospheric carbon dioxide over the same period. Looking ahead, they project a global temperature rise in the range of 1.5°C to 4.5°C during the 21st century, depending on the extent of worldwide economic growth and the rate of fossil fuel consumption.

An increase of a few degrees may not seem serious, but Professor Wolfson stresses that this is a global average. The rise will be more substantial in certain areas—particularly in the polar regions and over almost all land. He further notes that about 6°C separates the present-day climate from the depths of an ice age. Thus, an increase of a few degrees in global temperature is climatologically significant and may lead to many more extreme events, such as heat waves, intense precipitation, droughts, and intense tropical storms. At the same time, the sea level will be rising due electricity 2pm to the thermal expansion of the oceans and the melting of land-based glaciers and ice sheets.