| 单词 | Water vapor feedback |
| 释义 |
Water vapor feedback
中文百科
温室气体 Greenhouse gas（重定向自Water vapor feedback）
  温室气体（英语：Greenhouse Gas, GHG）或称温室效应气体，是指大气中促成温室效应的气体成分。自然温室气体包括水蒸气（H2O），水气所产生的温室效应大约占整体温室效应的60-70%，其次是二氧化碳（CO2）大约占26%，其他还有臭氧（O3）、甲烷（CH4）、氧化亚氮（又称笑气，N2O）、以及人造温室气体氯氟碳化物（CFCs）、全氟碳化物（PFCs）、氢氟碳化物（HFCs，含氯氟烃HCFCs及六氟化硫SF6）等。 纵使大部分二氧化碳在自然界的碳循环中拿走，自从工业革命起人类燃烧化石燃料仍然导致大气层内二氧化碳浓度由280ppm上升至400ppm。
英语百科
Greenhouse gas 温室气体（重定向自Water vapor feedback）
  ![The false colors in this image represent concentrations of carbon monoxide in the lower atmosphere, ranging from about 390 parts per billion (dark brown pixels), to 220 parts per billion (red pixels), to 50 parts per billion (blue pixels).[14]](/uploads/202502/20/Mopitt_first_year_carbon_monoxide0454.jpg) ![Schmidt et al. (2010)[19] analysed how individual components of the atmosphere contribute to the total greenhouse effect. They estimated that water vapor accounts for about 50% of Earth's greenhouse effect, with clouds contributing 25%, carbon dioxide 20%, and the minor greenhouse gases and aerosols accounting for the remaining 5%. In the study, the reference model atmosphere is for 1980 conditions. Image credit: NASA.[20]](/uploads/202502/20/Attribution_of_individual_atmospheric_component_contributions_to_the_terrestrial_greenhouse_effect,_separated_into_feedback_and_forcing_categories_(NASA)0454.png) A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Without greenhouse gases, the average temperature of Earth's surface would be about −18 °C (0 °F), rather than present average of 15 °C (59 °F). In the Solar System, the atmospheres of Venus, Mars and Titan also contain gases that cause a greenhouse effect. |
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