The Anthropogenic Greenhouse Effect. Lesson 3 . History in a Tree Trunk. Recording growth is one way to document change. The growth of a tree is documented in the widths of its rings. . One tree ring is formed every year, during the summer when the tree grows.
At its deepest, the ice layer is thought to be 200 000 years old, while the ice layer at the surface was formed the previous winter. The pieces of the ice core were dated, labelled, and stored frozen.
Ancient ice can be studied, air at the time of freezing is trapped in the ice can be analyzed for CO2 concentrations.
CO2 remained stable for 10,000 years at 280 ppm, then around 1750 (Industrial Revolution) CO2 began to rise rapidly to its current state of 385 ppm.
Increased greenhouse gas concentrations mean that less thermal energy is released back into space, and as a result, the average temperature at Earth’s surface increases.
As a carbon source, very little CO2 and CH4 is released. When it is burned, large amounts of CO2 and N2O are produced.
For every litter of gasoline burned, 2.3kg of CO2 is produced.
Any process that takes carbon dioxide from the atmosphere and stores it. Example: As the ocean warms CO2 stored in the cold water is released in the air.
The anthropogenic greenhouse effect is a change in Earth’s net radiation budget caused by the increase in human-generated greenhouse gases.
The observed increase in Earth’s average annual temperature.
Climate change means that more than just temperature is changing; so are the number and severity of storms, the strength of winds, and the amounts of precipitation, contributing to both floods and droughts. In general, the world is experiencing more extreme conditions
We live in a disposable society where everything is thrown out. Landfills compress the garbage; bacteria break down the garbage and produce methane gas. By reducing consumption we can help to reduce our carbon footprint.