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- An overcast sky gives the city a sombre appearance, as if brooding on an uncertain future. From the Cambridge English Corpus The albedo of a complete overcast sky ranges from 44 to 50 per cent for cirrostratus to 90 per cent for cumulonimbus.
dictionary.cambridge.org/dictionary/english/overcast
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Albedo (/ ælˈbiːdoʊ / al-BEE-doh; from Latin albedo 'whiteness') is the fraction of sunlight that is diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects all incident radiation).
- What Is Albedo?
- Earth's Energy Budget Includes Albedo
- When Do Albedo Values Change?
- Why Does NASA Study Albedo?
When sunlight reaches the Earth’s surface, some of it is absorbed and some is reflected. The relative amount (ratio) of light that a surface reflects compared to the total incoming sunlight is called albedo. A surface with a high albedo will reflect more sunlight than a surface with low albedo. Surfaces with high albedos include sand, snow and ice,...
The albedo of areas on Earth will affect the amount of solar energy absorbed. Therefore, Earth's energy budget can be affected by snow and ice cover, seasonal vegetation and land-use changes which change surfaces. See how these changes can affect albedo.
Seasonal Changes in Earth's Surface Albedo
The flow of energy in the Arctic is heavily influenced by the seasons. In this section, we will learn why seasons in the Arctic are so much different than other locations on Earth. First of all, we experience day and night because the Earth is always rotating upon its axis, but Earth’s axis is actually tilted at an angle of 23.5 degrees. As Earth orbits the sun, its tilted axis always points in the same direction. Throughout the year, different parts of Earth get the sun’s direct rays. So, wh...
Polar Day and Night Cycles
Because of the Earth’s axial tilt, the Arctic Circle sees dramatic day/night cycles depending on the season. The animation shows how certain areas of the earth receive more day or night time depending on the season. Credit: NASA's Scientific Visualization Studio Read about the day and night cycle near the North Pole and then replay the animation and see if you can spot these changes.
As mentioned above, albedo is important for Earth's energy budget and climate modeling. The impact of changing albedo contributes to stronger warming trends in the Arctic. This is because the warming causes sea ice melt which lowers the albedo of the Arctic. When the albedo is lowered, more solar energy is absorbed leading to even more warming. Thi...
Albedo is a measurement of the amount of light reflected from the surface of a celestial object, such as a planet, satellite, comet or asteroid. The albedo is the ratio of the reflected light to the incident light:
PlanetBond AlbedoGeometric Albedo0.120.14Venus0.750.84Earth0.300.37Moon0.120.11Albedo (/ælˈbiːdoʊ/ al-BEE-doh; from Latin albedo 'whiteness') is the fraction of sunlight that is diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects all incident radiation).
Cloud albedo is a measure of the albedo or reflectivity of a cloud. Clouds regulate the amount of solar radiation absorbed by a planet and its solar surface irradiance. Generally, increased cloud cover correlates to a higher albedo and a lower absorption of solar energy.
Sep 21, 2024 · Albedo, fraction of light that is reflected by a body or surface. It is commonly used in astronomy to describe the reflective properties of planets, satellites, and asteroids. It is an important consideration in climatology since recent decreases in the albedo in the Arctic has increased heat absorption at the surface.
Albedo (sometimes referred to as 'reflection coefficient') is a measure of how reflective a surface is. The term is derived from the Latin albus meaning 'white' and is either...
