The Greenhouse effect A T M P G R E E N H OU S E 2 and is con tion back (G 13 How do heat-trapping gases work? o0agragaac0s2h8 osphenc gases 0000 ☐Carbon dioxide 100 surface warms from the energy back to the atmosphere as infrared h8a8n9yaaS space.When gre se gases aharection,incuihg6adk concentrationofa he nhous Wavelength (um) Earth. 名9新s院a 《燃烧学基础》1，绪论 陈正(cz@pku.edu.cn)14澦࢖䏝؅ׁक澧ͬ ঠ੥ ୟࠔ I`&VQ[KJ[IT  澦࢖䏝؅ׁक澧ͬ ঠ੥ ୟࠔ I`&VQ[KJ[IT How do heat-trapping gases work? The energy from the sun that reaches Earth's surface is mostly "shortwave" radiation - mostly visible light. This energy passes freely through the atmosphere and is absorbed by Earth’s surface. The surface warms from the energy input, and some of its heat projects back to the atmosphere as infrared radiation. The greenhouse gases in the atmosphere absorb 95% of the energy in infrared radiation, allowing only 5% to pass into space. When greenhouse gases absorb energy, heat is released in all directions, including back towards Earth. As the concentration of greenhouse gases increases, this “insulating blanket” thickens, further warming the Earth.