5

# Sphericity, Conduction, and Convection

## Lecture no. 5 from the course: Meteorology: An Introduction to the Wonders of the Weather

Taught by Professor Robert G. Fovell | 31 min | Categories: The Great Courses Plus Online Science Course

If all the Earth receives energy from the sun, why are there such wide temperature differences across the planet? Why do we have seasons? Answer these questions while learning about how heat moves through the atmosphere via two basic processes: conduction and convection.

## Reviews

t********m
May 27, 2018
Who else is sitting here drinking homemade chocolate milk?
p********m
March 24, 2018
p********m
October 15, 2017
+++++ Extra-ordinarily accurate and insightful script! Wonderful diagram of the atmospheric layers, and brilliantly overlaid with the graph; the best I’ve seen in all my study of meteorology. Again, these two images should be shown in previous lectures to accompany the introduction, thus giving the audience strong repetition of this core concept in addition to the presenter’s outstanding inductive explanations. Superb explanation and diagrams of equatorial-polar temperature variation, and of oblique angle effect & eccentricity, with profound pragmatic observations of each. Vital comment: heat = energy. I totally agree that ‘energy transfer’ is the more accurate way to explain the dynamics of conduction and convection. Atomic billiards and spoon/glass are good illustrations. Water & air at same temperature is interesting and helpful. Fibreglass, snow, wool & cork insulation examples are also very practical, and they demonstrate the principle being explained. Beach sand also conducts heat to human feet very quickly because human flesh conducts heat better than water & air. Depth & circulation of energy in sand, water & air is a very useful comparison. Vertical temperature profile graph and explanation is important. - ‘Energy storage’ might be a better way to explain ‘heat capacity’ / ‘thermal inertia’. What is the difference between convection and advection? A definition of ‘diurnal’ is probably needed for many viewers. Need to show the diagrams and graphs again during the summary. Please don’t personify nature!