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Tag: prehistoric
CO2 levels for February eclipsed prehistoric highs
2015-03-06 15:00:00| Climate Ark Climate Change & Global Warming Newsfeed
Scientific American: February is one of the first months since before months had names to boast carbon dioxide concentrations at 400 parts per million.* Such CO2 concentrations in the atmosphere have likely not been seen since at least the end of the Oligocene 23 million years ago, an 11-million-year-long epoch of gradual climate cooling that most likely saw CO2 concentrations drop from more than 1,000 ppm. Those of us alive today breathe air never tasted by any of our ancestors in the entire Homo genus. Homo sapiens...
Tags: february
levels
co2
highs
400 ppm: Carbon dioxide in the atmosphere reaches prehistoric levels
2013-05-10 16:00:00| Climate Ark Climate Change & Global Warming Newsfeed
Scientific American: On May 2, after nightfall shut down photosynthesis for the day in Hawaii, carbon dioxide levels in the atmosphere touched 400 parts-per-million there for the first time in at least 800,000 years. Near the summit of volcanic Mauna Loa--where a member of the Keeling family has kept watch since 1958--sensors measured this record through sunrise the following day. Levels have continued to dance near that benchmark in recent days, registering above 400 ppm for the first time in eons after midnight on...
Tags: levels
carbon
atmosphere
reaches
Social media for prehistoric firms
2013-04-08 01:04:13| BBC News | Business | UK Edition
The US hotel gaining social media friends through dinosaurs
Tags: media
social
firms
prehistoric
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