Exam 17: Global Change

Suppose the global community came to an agreement to reduce CO₂ emissions that had the same impact as the Montreal Protocol had for CFCs. Predict how CO₂ levels would change over the next several decades.

Carbon dioxide levels in the atmosphere first began to rapidly increase above natural levels around 1950.

Suppose each of the following compounds were released into the atmosphere in equal amounts. Which greenhouse gas would cause the most warming?

Global sea levels have increased 1-2 meters over the last century.

Which of the following is a carbon sink?

Which one of the following characteristics does not contribute to ozone depletion over Antarctica?

What type of climate change forcing is a volcanic aerosol?

Anthropogenic carbon dioxide is produced by vegetation.

The following diagram illustrates the Carbon Cycle. Each arrow represents the transfer of carbon from one component of the Earth system to another. For example, arrow 1 represents the transfer of carbon from the biosphere to the atmosphere. Match the lettered answers below to the number on the diagram. -Match the lettered answers to number 8 on the diagram.

Global precipitation has increased as temperatures increased over the last century.

The following diagram illustrates the Carbon Cycle. Each arrow represents the transfer of carbon from one component of the Earth system to another. For example, arrow 1 represents the transfer of carbon from the biosphere to the atmosphere. Match the lettered answers below to the number on the diagram. -Match the lettered answers to number 9 on the diagram.

Where is carbon stored in the oceans?

The following diagram illustrates the Carbon Cycle. Each arrow represents the transfer of carbon from one component of the Earth system to another. For example, arrow 1 represents the transfer of carbon from the biosphere to the atmosphere. Match the lettered answers below to the number on the diagram. -Match the lettered answers to number 5 on the diagram.

Global concentrations of carbon dioxide have increased by ~30% over the last 150 years.

Suppose you have a choice of fuels to use to heat your home. Which CO₂ source produces the least carbon per unit of energy?

Atmospheric levels of CO₂ are higher than have been documented in the past 500,000 years.

What would happen to ozone levels if global volcanic activity increased?

Why has the rate of global warming been slower than expected over parts of the Northern hemisphere?

The Earth can take care of the CO₂ problem by itself on human timescales.

What has happened to average global temperatures over the last 100 years?