Surface Albedo Comparison
Albedo measures the reflectivity of a surface. It represents the fraction of incident solar radiation that is reflected back into space. A higher albedo means more reflection and less absorption of sunlight.
Analyzing Surface Reflectivity
- Leafy crops: Healthy vegetation, like leafy crops, has a relatively high albedo. This is due to the pigments (like chlorophyll) and the complex structure of leaves, which reflect a significant portion of sunlight, especially in the near-infrared spectrum.
- Dry sand: Dry sand has a moderate to high albedo, generally reflecting more sunlight than dark surfaces like asphalt or water. However, its albedo is typically lower than that of healthy, green vegetation.
- Calm sea water: Water surfaces, especially calm ones, have a low albedo because water absorbs most of the solar radiation that hits it. Reflection is minimal compared to other surfaces.
- Dark asphalt: Dark asphalt is a dark material designed to absorb solar radiation to generate heat. It has a very low albedo, meaning it reflects very little sunlight.
Conclusion on Maximum Albedo
Comparing the surfaces, leafy crops exhibit the highest reflectivity (albedo) among the given options due to their composition and structure, reflecting more solar radiation compared to dry sand, calm sea water, and dark asphalt.
Important Questions from Atmosphere
Which of the following statements with reference to Surface inversion of temperature is/are correct? 1. It causes instability in the lower layers of the atmosphere. 2. This inversion commonly lasts for a few hours until the Sun comes up.
Identify the cloud on the basis of the following characteristics: I. They look like cotton wool. II. They exist in patches and have flat base. III. They are generally formed at a height of 4 to 7 km.
Which of the following statements with reference to Surface inversion of temperature is/are correct?
1. It causes instability in the lower layers of the atmosphere.
2. This inversion commonly lasts for a few hours until the Sun comes up.Identify the cloud on the basis of the following characteristics:
I. They look like cotton wool.
II. They exist in patches and have flat base.
III. They are generally formed at a height of 4 to 7 km.Given below are two statements :
Statement (I): Atmospheric stability is important because it determines the ability of pollutants to disperse vertically in the atmosphere.
Statement (II): In summer season in India. the atmosphere is generally stable.
In the light of the above statements, choose the correct answer from the options given
