US: The Carbon dioxide (CO2) levels peaked more than 50 per cent higher than pre-industrial levels in May, comparable to levels seen about 4 million years ago, according to scientists. 美国:科学家表示,5月份,二氧化碳(CO2)浓度达到峰值,比工业化前水平高出50%以上,与大约400万年前的水平相当。
Antarctic CO2 Levels Highest in 4 Million Years: Is That a Problem?Antarctica recently witnessed an event that last took place fourmillion years ago: Carbon...Thomson, Jason
Rae et al. 2021). During the last Ice Age, CO2varied between about180 and 300ppmas ice sheets waxed and waned with orbital wobbles (Rae et al. 2021, and see thisexplainerby Hausfather 2020). CO2was atsimilar levelsduring the Paleozoic Ice Age, 340-290 million years ago(Foster et al....
The last time CO2 levels were as high as today, ocean waters drowned the lands where big cities like Houston, Miami, and New York City now exist. It’s a time called the Pliocene (上新世) or mid-Pliocene, some 3 million years ago, when sea levels were around 30 feet higher (but ...
Using ice cores drilled in Greenland and Antarctica, scientists havea pretty good recordof how the composition of Earth’s atmosphere has fluctuated over the last 800,000 years. That’s why scientists know carbon dioxide levels are higher than they’ve ever been in that amount of time. ...
it passed 400 parts per million this January, the earliest in the year it has exceeded thisbenchmark. ⑤Even if emissions stay flat, the world remains on course towards a temperature rise of around 3°C by 2100, compared with...
Some got levels of between 363 and 386 Parts per million(ppm), which were typical at that time. (CO2 levels have since rise. ) Other plants were exposed to more of that greenhouse gas as they grew 546 to 586 ppm. Such levels are expected to develop within the next 50 years or so....
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...
Using a new computer simulation,researchers at the Potsdam Institute for Climate Impact Research (PIK), in Germany, found that the last time the earth’s atmosphere had a CO2 concentration as high as today’s was during the Pliocene epoch, the geological period 2.6-5.3 million years ago. ...
According to data from the Mauna Loa Observatory in Hawaii, the concentration of CO2 in the atmosphere is over 415 parts per million (ppm), far higher than at any point in the last 800,000 years, since before the evolution of homo sapiens. Holthaus spotted the new high on Sunday when ...