Climate sensitivity is typically defined as the global temperature rise following a doubling of CO2 concentration in the atmosphere compared to pre-industrial levels. Pre-industrial CO2 was about 260 parts per million (ppm), so a doubling would be at roughly 520 ppm.
What is climate sensitivity and why is it important?
Marvel: “The most important thing about climate sensitivity is that it’s not zero. Increasing atmospheric carbon dioxide definitely makes it warmer and increases the risk of extreme weather like drought, downpours, and heat waves. But better estimates of climate sensitivity are important for motivating action.
How do you calculate climate sensitivity?
It is usual to write R as αT, so that N = F − αT, where the climate feedback parameter α (W m−2 K−1) is the increase in radiation to space per unit of global warming. Its reciprocal s ≡ 1/α (K W−1 m2), called the climate sensitivity parameter, is the steady state global warming per unit increase in radiative forcing.
What would be climate sensitivity be with no feedbacks?
Equilibrium Climate Sensitivity (ECS)
The Equilibrium Climate Sensitivity in the absence of feedback is 1.2 K.
What is the equilibrium climate sensitivity?
Abstract. The equilibrium climate sensitivity of Earth is defined as the global mean surface air temperature increase that follows a doubling of atmospheric carbon dioxide. For decades, global climate models have predicted it as between approximately 2 and 4.5 °C.
What is climate sensitivity quizlet?
Terms in this set (9) Climate Sensititivity. the measure of how much the Earth’s global mean temperature will change in response to radiative forcing. Radiative Forcing. a change in the balance between incoming solar radiation and outgoing thermal radiation.
What is the most important feedback involved in co2 climate sensitivity?
Forcings and feedbacks together determine how much and how fast the climate changes. The main positive feedback in global warming is the tendency of warming to increase the amount of water vapor in the atmosphere, which in turn leads to further warming.
What is climate sensitivity parameter?
Climate sensitivity is a measure of how much the Earth’s climate will cool or warm after a change in the climate system, such as how much it will warm for doubling in carbon dioxide ( CO 2) concentrations.
What is the largest source of uncertainty in climate sensitivity?
The representation of clouds is widely regarded as the largest source of uncertainty in estimates of climate sensitivity obtained by global climate models (GCMs) (Boucher et al.
What is meant by climate forcing?
Climate forcing is the physical process of affecting the climate on the Earth through a number of forcing factors. … Examples of some of the most important types of forcings include: variations in solar radiation levels, volcanic eruptions, changing albedo, and changing levels of greenhouse gases in the atmosphere.
How could you reduce your CO2 emissions?
How to limit your carbon footprint?
- Consume local and seasonal products (forget strawberries in winter)
- Limit meat consumption, especially beef.
- Select fish from sustainable fishing.
- Bring reusable shopping bags and avoid products with excessive plastic packaging.
- Make sure to buy only what you need, to avoid waste.
How do feedbacks affect the climate sensitivity?
Climate sensitivity describes the effect that increases in CO2 (and other greenhouse gases) have on the global near-surface air temperature. This characteristic of the climate system emerges from many feedbacks on a wide range of time scales following an initial immediate change in radiative balance of the atmosphere.
What are greenhouse gases?
The main gases responsible for the greenhouse effect include carbon dioxide, methane, nitrous oxide, and water vapor (which all occur naturally), and fluorinated gases (which are synthetic). Greenhouse gases have different chemical properties and are removed from the atmosphere, over time, by different processes.