Atmosphere
State the atmospheric layer where weather occurs
Troposphere
Why did the greenhouse gas refuse to leave the atmosphere?
Because it didn’t want to let things cool off
Define a climate proxy
A climate proxy is an indirect source of climate data, such as tree rings, ice cores, or sediment layers, used to reconstruct past climate conditions.
Why did Earth break up with carbon dioxide?
Because it felt like the relationship was getting a little too heated 😄
describe the role of positive feedback loops in climate change.
Positive feedback loops amplify climate change by reinforcing initial warming, such as when melting ice reduces albedo, leading to more heat absorption and further melting.
Describe how temperature changes with altitude in the troposphere?
In the troposphere, temperature generally decreases with increasing altitude because air pressure decreases and heat is lost as air expands.
Describe the role of carbon dioxide in the greenhouse effect?
Carbon dioxide absorbs outgoing longwave radiation emitted by the Earth’s surface and re-radiates it in all directions, helping to retain heat in the atmosphere.
describe how changes in albedo can influence global temperatures.
Changes in albedo affect how much solar radiation is reflected or absorbed by Earth’s surface. A decrease in albedo, such as from melting ice, leads to more absorption of heat and increased temperatures, while an increase in albedo reflects more radiation and cools the planet.
Describe how climate change affects coral reefs
Rising sea temperatures stress coral organisms, causing them to expel symbiotic algae, which leads to coral bleaching and, if prolonged, coral death.
Describe one adaptation strategy to climate change.
One adaptation strategy is building sea walls to protect coastal areas from rising sea levels and increased storm surges.
Explain how convection currents form in the atmosphere?
Convection currents form when the Earth’s surface is heated by solar radiation, causing warm air to rise. As the air rises, it cools, becomes denser, and sinks, creating a continuous circulation of air.
Explain how human activities enhance the greenhouse effect?
Human activities such as burning fossil fuels, deforestation, and industrial processes increase the concentration of greenhouse gases like carbon dioxide and methane, leading to greater heat retention and an enhanced greenhouse effect.
Explain how ice cores provide evidence for past climates?
Ice cores contain trapped air bubbles that preserve samples of past atmospheres. By analyzing these gases and isotopic composition, scientists can infer past temperatures and greenhouse gas concentrations.
Explain how melting ice contributes to sea level rise.
Melting land-based ice, such as glaciers and ice sheets, adds water to the oceans, while rising temperatures also cause thermal expansion of seawater, both contributing to sea level rise.
explain how renewable energy reduces climate change.
Renewable energy sources such as solar and wind generate electricity without emitting greenhouse gases, reducing reliance on fossil fuels and lowering overall emissions.
Compare the troposphere and stratosphere?
The troposphere is the lowest layer of the atmosphere where weather occurs and temperature decreases with altitude. In contrast, the stratosphere lies above it, contains the ozone layer, and temperature increases with altitude due to absorption of UV radiation.
Distinguish between the natural and enhanced greenhouse effect?
The natural greenhouse effect maintains Earth’s temperature at a level suitable for life, while the enhanced greenhouse effect is caused by human activities increasing greenhouse gas concentrations, leading to additional warming.
Compare direct and indirect climate data?
Direct climate data is obtained from instruments such as thermometers and satellites and provides recent, precise measurements. Indirect data comes from proxies like tree rings and ice cores and provides long-term historical records but with less precision.
distinguish between primary and secondary impacts of climate change
Primary impacts are direct effects such as increased temperatures and sea level rise, while secondary impacts are indirect consequences such as food shortages, economic disruption, and human migration.
Compare mitigation and adaptation strategies.
Mitigation strategies aim to address the causes of climate change by reducing emissions, while adaptation strategies focus on adjusting to the impacts and minimizing damage.
To what extent does atmospheric circulation regulate global climate?
Atmospheric circulation plays a major role in regulating global climate by redistributing heat from the equator to the poles. However, its influence is moderated by other factors such as ocean currents, albedo, and greenhouse gas concentrations, so it is all important but not sole cause
Evaluate the importance of methane compared to carbon dioxide in climate change?
Methane is more potent than carbon dioxide in trapping heat over short timescales, making it highly significant in the short term. However, carbon dioxide has a much longer atmospheric lifetime and is more abundant, making it the more important driver of long-term climate chang
To what extent is the evidence for climate change reliable?
The evidence for climate change is highly reliable because it is supported by multiple independent sources, including temperature records, ice cores, and satellite data. While there are uncertainties in projections and models, the overall conclusion of warming is strongly supported.
To what extent are developing countries more vulnerable to climate change impacts?
Developing countries are generally more vulnerable due to limited financial resources, weaker infrastructure, and greater reliance on climate-sensitive sectors like agriculture. However, developed countries are also affected, so vulnerability is greater but not exclusive.
Evaluate the effectiveness of the Paris Agreement.
The Paris Agreement is effective in promoting global cooperation and setting targets to limit warming. However, its effectiveness is limited by voluntary commitments and lack of strict enforcement, meaning progress varies between countries.