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Carbon dioxide level crosses milestone at Hawaii site
2013-05-11 16:00:00| Climate Ark Climate Change & Global Warming Newsfeed
Reuters: The amount of climate-warming carbon dioxide in the atmosphere topped 400 parts per million at a key observing station in Hawaii for the first time since measurement began in 1958, the National Oceanic and Atmospheric Administration said on Friday. To many scientists, crossing the 400 ppm threshold, which means that there are 400 molecules of carbon dioxide for every million molecules in the air, is a bit like the Dow Jones Industrial Average rising above 15,000 points. "It's important mainly...
Tags: site
level
hawaii
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Carbon dioxide passes 400 ppm milestone, NOAA finds
2013-05-11 16:00:00| Climate Ark Climate Change & Global Warming Newsfeed
Climate Central: On May 9, the amount of carbon dioxide in the air exceeded 400 parts per million (ppm) for the first time in the observational record since 1958, and very likely for the first time in at least 800,000 years, the National Oceanic and Atmospheric Administration (NOAA) announced on Friday. This marks the first time the daily average CO2 concentration has risen past 400 ppm in the iconic record kept by the Mauna Loa Observatory in Hawaii, where daily observations go back to 1958, Climate scientists...
Carbon dioxide reaches levels never seen by humans
2013-05-11 12:16:00| Climate Ark Climate Change & Global Warming Newsfeed
Greenpeace: The levels of the carbon dioxide in the atmosphere has reached 400 parts per million for the first time in human history. The last time levels were this high global average temperatures eventually reached 3 or 4C° higher than now, the polar regions were up to 10C° warmer than today the Greenland and Antarctic ice sheets were smaller and Sea level ranged between five and 40 meters (16 to 131 feet) higher than today. There are two reasons to be seriously worried by this year's CO2 measurements...
Tags: levels
humans
carbon
reaches
Carbon dioxide in atmosphere at highest level for 5 million years
2013-05-11 10:29:00| Climate Ark Climate Change & Global Warming Newsfeed
Independent: The concentration of carbon dioxide in the atmosphere has breached the symbolically important level of 400 parts per million (ppm) for the first time in 5 million years after rising at its fastest rate since records began. Average daily CO2 levels jumped by 2.74 ppm in the first 17 weeks of 2013, compared to last year, the biggest increase since the benchmark monitoring stations high on the Hawaiian volcano of Mauna Loa began taking measurements in 1958. Experts blamed most of the increase...
Tags: years
level
million
highest
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
atmosphere
carbon
reaches
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