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Earth has an albedo of about 0.306 and a solar irradiance (L / 4 π D 2) of 1361 W m −2 at its mean orbital radius of 1.5×10 8 km. The calculation with ε=1 and remaining physical constants then gives an Earth effective temperature of 254 K (−19 °C). [11] The actual temperature of Earth's surface is an average 288 K (15 °C) as of 2020. [12]
[13] [14] Similarly, Earth has an effective temperature of 255 K (−18 °C; −1 °F), [14] but a surface temperature of about 288 K (15 °C; 59 °F) [15] due to the greenhouse effect in our lower atmosphere. [5] [4] The surface temperatures of such planets are more accurately estimated by modeling thermal radiation transport through the ...
This gives an effective temperature of 6 °C on the surface of the Earth, assuming that it perfectly absorbs all emission falling on it and has no atmosphere. The Earth has an albedo of 0.3, meaning that 30% of the solar radiation that hits the planet gets scattered back into space without absorption.
In other words, emissions to space are given by = where is the effective emissivity of Earth as viewed from space and [/] / 289 K (16 °C; 61 °F) is the effective temperature of the surface. [ 38 ] : 934
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Emissions from surface: Based on thermal emissions from the surface, Earth's effective surface temperature is about 16 °C (61 °F), [22]: 934 which is 34 °C (61 °F) warmer than Earth's overall effective temperature. Earth's surface temperature is often reported in terms of the average near-surface air temperature. This is about 15 °C (59 ...
The temperature of Earth’s core is about 11,000 degrees Fahrenheit, according to Discover magazine. How exactly do scientists measure this? Earth has a solid iron inner core and a liquid iron ...
Aerosols, clouds, water vapor, and trace greenhouse gases contribute to an effective value of about ε = 0.78. The strong (fourth-power) temperature sensitivity maintains a near-balance of the outgoing energy flow to the incoming flow via small changes in the planet's absolute temperatures.