“2021年IOAA理论第2题-地球的温度”的版本间的差异
Jingsong Guo（讨论 | 贡献） （创建页面，内容为“==英文题目== ==中文翻译== ==解答==”） |
Jingsong Guo（讨论 | 贡献） |
||
| 第1行： | 第1行： | ||
==英文题目== | ==英文题目== | ||
| + | |||
| + | '''Temperature of the Earth (10 points).''' | ||
| + | For at least the last few million years, the Earth has been in roughly thermal equilibrium with the radiation | ||
| + | from the Sun at the Earth's orbital distance. | ||
| + | |||
| + | 2.1 Assuming our planet to be an ideal black body, calculate what the Earth's equilibrium | ||
| + | temperature (in Celsius) would be. | ||
| + | <p style="text-align:right">4.0pt</p> | ||
| + | |||
| + | 2.2 The Earth's albedo is approximately 30%. Calculate the Earth's surface temperature | ||
| + | (in Celsius) considering its albedo. | ||
| + | <p style="text-align:right">2.0pt</p> | ||
| + | |||
| + | 2.3 The Earth’s absorbed radiation is reemitted as black body radiation from its surface, | ||
| + | but its atmosphere re-absorbs 58% of that energy, causing a greenhouse | ||
| + | effect. Considering this effect, calculate the Earth's surface temperature (which | ||
| + | will be the same as the temperature of the lower atmosphere). Give your answer | ||
| + | in Celsius. | ||
| + | For simplicity, consider the reabsorption effect as happening only once, and do | ||
| + | not consider the atmosphere as a separate black body. | ||
| + | <p style="text-align:right">4.0pt</p> | ||
==中文翻译== | ==中文翻译== | ||
==解答== | ==解答== | ||
2022年3月9日 (三) 21:50的版本
英文题目
Temperature of the Earth (10 points). For at least the last few million years, the Earth has been in roughly thermal equilibrium with the radiation from the Sun at the Earth's orbital distance.
2.1 Assuming our planet to be an ideal black body, calculate what the Earth's equilibrium temperature (in Celsius) would be.
4.0pt
2.2 The Earth's albedo is approximately 30%. Calculate the Earth's surface temperature (in Celsius) considering its albedo.
2.0pt
2.3 The Earth’s absorbed radiation is reemitted as black body radiation from its surface, but its atmosphere re-absorbs 58% of that energy, causing a greenhouse effect. Considering this effect, calculate the Earth's surface temperature (which will be the same as the temperature of the lower atmosphere). Give your answer in Celsius. For simplicity, consider the reabsorption effect as happening only once, and do not consider the atmosphere as a separate black body.
4.0pt
