When the sea ice melts you have water, which has an albedo of 0.2.

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The Modis albedo measurements allow scientists to monitor how the Earth's reflectivity changes on a global scale.

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This decreased level of reflectivity, or albedo, allowed the surface to absorb more energy from the Sun.

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Higher temperatures will melt ice, which lowers the albedo, reducing reflection of sunlight back out into space.

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This sharp increase of net all-wave radiation is related to the decrease of albedo due to the precipitation deficit.

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However, we then also get all sorts of feedback effects: ice melts, albedo changes, methane might be released, the drying of soils might kill forests.

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Albedo variations play a vital role in the Earth's climate.

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This may be achieved by increasing the surface reflectivity of the planet, for example by brightening human structures, planting crops with a higher albedo, or covering deserts with reflective material.

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He explained that sea ice has albedo of 0.8.

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The question then becomes, well, what happens then: when the ice melts and albedo lowers, when warmer weather and higher CO2 increase plant growth, what happens to clouds and so on through a list of hundreds of possible feedbacks.

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