Another study in the long lists of study which find that the sun or the tides or submarine volcanoes can be causing warming. No wonder the models blaming co2 never work on out of sample data. http://wattsupwiththat.com/2015/02/...pulses-may-alter-climate-models-may-be-wrong/ " Scientists have already speculated that volcanic cycles on land emitting large amounts of carbon dioxide might influence climate; but up to now there was no evidence from submarine volcanoes. The findings suggest that models of earth’s natural climate dynamics, and by extension human-influenced climate change, may have to be adjusted. The study appears this week in the journal Geophysical Research Letters. “People have ignored seafloor volcanoes on the idea that their influence is small–but that’s because they are assumed to be in a steady state, which they’re not,” said the study’s author, marine geophysicist Maya Tolstoy of Columbia University’s Lamont-Doherty Earth Observatory. “They respond to both very large forces, and to very small ones, and that tells us that we need to look at them much more closely.” A related study by a separate team this week in the journal Science bolsters Tolstoy’s case by showing similar long-term patterns of submarine volcanism in an Antarctic region Tolstoy did not study. Volcanically active mid-ocean ridges crisscross earth’s seafloors like stitching on a baseball, stretching some 37,000 miles. They are the growing edges of giant tectonic plates; as lavas push out, they form new areas of seafloor, which comprise some 80 percent of the planet’s crust. Conventional wisdom holds that they erupt at a fairly constant rate–but Tolstoy finds that the ridges are actually now in a languid phase. Even at that, they produce maybe eight times more lava annually than land volcanoes. Due to the chemistry of their magmas, the carbon dioxide they are thought to emit is currently about the same as, or perhaps a little less than, from land volcanoes–about 88 million metric tons a year. But were the undersea chains to stir even a little bit more, their CO2output would shoot up, says Tolstoy. Some scientists think volcanoes may act in concert with Milankovitch cycles–repeating changes in the shape of earth’s solar orbit, and the tilt and direction of its axis–to produce suddenly seesawing hot and cold periods. The major one is a 100,000-year cycle in which the planet’s orbit around the sun changes from more or less an annual circle into an ellipse that annually brings it closer or farther from the sun. Recent ice ages seem to build up through most of the cycle; but then things suddenly warm back up near the orbit’s peak eccentricity. The causes are not clear. Enter volcanoes. Researchers have suggested that as icecaps build on land, pressure on underlying volcanoes also builds, and eruptions are suppressed. But when warming somehow starts and the ice begins melting, pressure lets up, and eruptions surge. They belch CO2 that produces more warming, which melts more ice, which creates a self-feeding effect that tips the planet suddenly into a warm period. A 2009 paper from Harvard University says that land volcanoes worldwide indeed surged six to eight times over background levels during the most recent deglaciation, 12,000 to 7,000 years ago. The corollary would be that undersea volcanoes do the opposite: as earth cools, sea levels may drop 100 meters, because so much water gets locked into ice. This relieves pressure on submarine volcanoes, and they erupt more. At some point, could the increased CO2from undersea eruptions start the warming that melts the ice covering volcanoes on land? more at link http://wattsupwiththat.com/2015/02/...pulses-may-alter-climate-models-may-be-wrong/
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"Scientists have already speculated that volcanic cycles on land emitting large amounts of carbon dioxide might influence climate..." This is contradictory only in those instances where CO2 = carbon dioxide.
you of course glossed over the "speculated"... why do you think they have to speculate. I will tell you why. historically in the data... co2 trails warming and cooling.
They're speculating because they don't know how much CO2 the volcanoes are really contributing, but not speculating that CO2 absorbs radiant energy with wavelengths above 4000 nanometers or not, they're certain it does.
and it also blocks the suns energy from warming the earth... and co2 decreases in its effectiveness logarithmically as you add more. since it trails warming and cooling of the ocean anyway... we have no idea if adding some man made co2 causes additional warming. that is why it is speculation.
Lets make this real simple. Are you denying that co2 in the atmosphere blocks some of the suns warming rays from reaching the surface? Are you denying co2 blocks IR from reaching the earths surface? Are you denying other wavelengths can also warm when they hit matter?
you need to click on the definition of sunlight. I posed those question to you... because I suspected you have been misled by agw propaganda. Shake it off... its a very complicated system that science is just beginning to understand. there is not enough science to declare that man made co2 causes warming in such a complex system. for instance... Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight is filtered through the Earth's atmosphere, and is obvious as daylight when the Sun is above the horizon. When the direct solar radiation is not blocked by clouds, it is experienced as sunshine, a combination of bright light and radiant heat. When it is blocked by the clouds or reflects off other objects, it is experienced as diffused light. The World Meteorological Organization uses the term "sunshine duration" to mean the cumulative time during which an area receives direct irradiance from the Sun of at least 120 watts persquare meter.[1] so now I repeat is co2 transparent to the infrared part of sunlight?