9. Which one of the following is the anthropogenic radiative forcing of climate? Explanation: Aerosols represents an important anthropogenic radiative forcing of climate.
Which one is the anthropogenic radiative forcing of climate?
In other cases, radiative forcing has an anthropogenic, or exclusively human, origin. For example, anthropogenic increases in carbon dioxide, methane, and nitrous oxide are estimated to account for 2.3 watts per square metre of positive radiative forcing.
Which one of the following greenhouse gases is the largest single contributor to anthropogenic radiative forcing?
Of the greenhouse gases shown in Figure 1, carbon dioxide accounts for by far the largest share of radiative forcing since 1990, and its contribution continues to grow at a steady rate. Carbon dioxide alone would account for a 36-percent increase in radiative forcing since 1990.
What is the current radiative forcing?
The current level of radiative forcing, according to the IPCC AR4, is 1.6 watts per square meter (with a range of uncertainty from 0.6 to 2.4).
Which of the following effect is responsible for global warming Mcq?
Explanation- When fossil fuels are burnt, massive volumes of carbon dioxide, a greenhouse gas, are released into the atmosphere. Global warming is caused by greenhouse gases, which trap heat in our atmosphere.
What is radiative forcing quizlet?
Terms in this set (9)
Radiative forcing. The difference between the incoming and outgoing energy. Aerosols. are tiny particles of solid or liquid that are suspended in the atmosphere and act to partially block the sun (Global dimming) Global dimming.
What is the total forcing ERF for all anthropogenic forcings?
The ERF induced by the total anthropogenic components is estimated to be 1.96 W m−2, composed of a positive ERF due to the well-mixed greenhouse gases (3.02 W m−2), negative ERFs due to the NTCFs (− 1.08 W m−2), which are mostly due to aerosols (− 1.22 W m−2), and slightly negative ERFs due to land-use changes (− 0.19 …
What is anthropogenic forcing?
Anthropogenic forcing is a change in the Earth’s energy balance due to human economical activities. Human economical activities cause changes in the amount of atmospheric radiatively active gases; in the amount of gaseous precursors of atmospheric aerosols and atmospheric ozone (O3), and in the Earth’s system’s albedo.
What causes radiative forcing?
A radiative forcing is an energy imbalance imposed on the climate system either externally or by human activities (examples: changes in solar energy output, volcanic emissions, deliberate land modification, anthropogenic emissions of greenhouse gases, aerosols, and their precursors).
What is the radiative forcing of CO2?
Thus CO2 concentration is a positive forcing on the temperature. For the particular atmospheric conditions chosen for this simulation, the doubled CO2 concentration decreases the amount of IR emission energy by 3.53 W·m–2. Thus, this imaginary CO2 concentration doubling produces a radiative forcing of +3.53 W·m–2.
What is the anthropogenic climate change?
Anthropogenic climate change is defined by the human impact on Earth’s climate while natural climate change are the natural climate cycles that have been and continue to occur throughout Earth’s history.
What is a climate forcing agent?
This warming is, at least in part, a result of anthropogenic climate forcing agents (3). A climate forcing is an imposed, natural, or anthropogenic perturbation of the Earth’s energy balance with space (3, 4). Increasing anthropogenic greenhouse gases (GHGs) cause the largest positive (warming) forcing.
What is a climate forcing factor?
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.
Which of the following effect is responsible for global warming?
Complete answer: Carbon-dioxide is responsible for ‘Global-Warming’. A layer of CO2 in the atmosphere traps the infrared radiation coming from earth’s surface. These trapped radiations heat the earth’s atmosphere and result in greenhouse effect and global warming.
What does the phrase anthropogenic CO2 emissions mean Mcq?
This set of Environmental Science Multiple Choice Questions & Answers (MCQs) focuses on “Greenhouse Gases – 1”. … Explanation: The word “anthropogenic” stands for environmental impact due to human activity.