Episode 144: Anthropogenic Climate Change

Warming Evidence

James Fodor presents compelling evidence that human activities are the primary drivers of recent climate warming. He explains that the warming is more pronounced at night than during the day, a pattern consistent with greenhouse gas emissions rather than solar irradiance 1. This is because the boundary layer of air warmed by the Earth's surface is smaller at night, leading to proportionally greater warming 1.

If global warming were caused by increases in solar irradiance, you would not expect to see that, obviously, because solar irradiance only operates during the day.

--- James Fodor

Fodor also notes the cooling of the stratosphere, which contrasts with the warming troposphere, further supporting the greenhouse gas theory 2.

   

Human Impact

The unique patterns in climate data further underscore human influence on climate change. Fodor highlights the increase in the height of the tropopause, a boundary between the troposphere and stratosphere, as a result of warming in the troposphere and cooling in the stratosphere 3. This change is indicative of human-produced greenhouse gases altering atmospheric conditions.

The combined effect of those is an increase in the height of the tropopause.

--- James Fodor

He explains that while the stratosphere cools due to its efficient emission of long-wave radiation, the troposphere warms as greenhouse gases enhance absorption, leading to a net increase in temperature 4.