Average annual atmospheric levels of carbon dioxide (CO₂) reached a record high of 421.08 parts per million (ppm) in 2023. Monthly atmospheric CO₂ concentrations peaked that year in May, at 424 ppm. Human activities have caused CO₂ concentrations to soar Annual CO₂ concentrations con...
根据第四段中“For an atmosphere with Earth’s atmospheric pressure, CO2 levels as high as 1 per cent can cause sleepiness in humans(在与地球大气压相当的大气中,二氧化碳浓度高达1%就会导致人类嗜睡)”,由此推知“once we reach levels of 10 per cent CO2(一旦我们达到10%的二氧化碳水平)”人们可能会...
Toxic cyanobacteria tended to be superior to non-toxic strains at low levels of CO2; however, the specific effects of microcystin on the regulation require further investigation. Furthermore, the effects of increasing CO2levels on cyanobacterial competitiveness in phytoplankton communities and nutrient ...
The ‘safe’ planetary boundary for emissions—understood as atmospheric concentration of 350 ppm CO2—was crossed in 19881. As of 2022, atmospheric concentrations are now 415 ppm (ref. 2), and global temperatures have reached 1.1 °C over preindustrial levels3. The Paris Agreement ...
The Piacenzian stage of the Pliocene (2.6 to 3.6 Ma) is the most recent past interval of sustained global warmth with mean global temperatures markedly higher (by ~2–3 °C) than today. Quantifying CO2 levels during the mid-Piacenzian Warm Period (
Tans P.P. & Mook W.G. (1980) Past atmospheric CO2 levels and the 13C/12C ratios in tree rings. Tellus 32, 268-283.Tans PP, Mook WG (1980) Past atmospheric CO2 levels and the 13C/12C ratios in tree rings. Tellus 32:268-283....
Raised atmospheric CO2 levels and increased N deposition cause shifts in plant species composition and production in Sphagnum bogs 来自 Wiley 喜欢 0 阅读量: 21 摘要: Part of the missing sink in the global CO2 budget has been attributed to the positive effects of CO2 fertilization and N deposit...
Each year, the concentration of CO2 at Mauna Loa rises and falls in a sawtooth fashion, with the next year higher than the year before. The peak of the sawtooth typically comes in May. IfCO2 levelsdon't top 400 ppm in May 2013, they almost certainly will next year, Keeling said. ...
升高的大气二氧化碳(CO2)的水平。 翻译结果2复制译文编辑译文朗读译文返回顶部 举起大气二氧化碳 ( CO2 ) 水平。 翻译结果3复制译文编辑译文朗读译文返回顶部 高架大气中二氧化碳 (CO2) 的水平。 翻译结果4复制译文编辑译文朗读译文返回顶部 提高大气中二氧化碳(co2)水平。
The release of carbon into the atmosphere due to the activities of humans has caused an increase in concentration as well as a change in the isotopic composition of atmospheric carbon dioxide. CO2 derived from fossil fuel combustion and from biomass dest