co2 levels lowest in history
https://www.scientificamerican.com/article/co2-levels-just-hit-another-record-heres-why-it-matters/9. It is believed to have been present in Earth's first atmosphere, shortly after Earth's formation. 1. https://www.co2.earth/co2-acceleration14. (Greenpeace co-founder)The public is being cynically misled by the mainstream media and government scientists about ‘ocean acidification.’ All the CO2 in the atmosphere came from inside the Earth. Carbon dioxide concentrations have varied widely over the Earth's 4.54 billion year history. The rate at which carbon dioxide is increasing is around 100 times faster than the increase that occurred when the last ice age ended 3. The second atmosphere, consisting largely of nitrogen and CO 2 was produced by outgassing from volcanism, supplemented by gases produced during the late heavy bombardment of Earth by huge asteroids. This greatly increases the chance that genetic mutations that are better suited to the changes in environmental conditions will occur in some offspring.A number of studies have demonstrated that change in an organism’s genetic make-up, or genotype, is not the only factor that allows species to adapt to changing environmental conditions. Secondly, these species produce thousands to millions of offspring every time they reproduce. A major part of carbon dioxide emissions were soon dissolved in water and incorporated in carbonate sediments. The second and more fascinating factor is transgenerational plasticity, which is the ability of parents to pass their adaptations to their offspring.20 One recent study pointed out that “contemporary coastal organisms already experience a wide range of pH and CO2 conditions, most of which are not predicted to occur in the open ocean for hundreds of years – if ever.”21The authors used what they called “a novel experimental approach that combined bi-weekly sampling of a wild, spawning fish population (Atlantic silverside Menidia menidia) with standardized offspring CO2 exposure experiments and parallel pH monitoring of a coastal ecosystem.”The parents and offspring were exposed to CO2 levels of 1,200 ppm and 2,300 ppm compared with today’s ambient level of 400 ppm. From a historical perspective, an atmospheric CO2 concentration of 400 ppm is actually almost scraping the bottom of the barrel. An abnormal CO2 test result could mean that there are either high or low CO2 levels in the body. It also indicates that this same species would not even notice the relatively slow rate at which CO2 is increasing in the atmosphere today. https://climate.nasa.gov/evidence/16. The amount of Co2 today at just 400 ppm today pales in comparison with the past when there was more than 5000 ppm which is > 10 X as much!
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In the early Phanerozoic, solar output was about 4% less than current levels. Examples of this in humans are the ability to acclimatize to different temperature regimes and different altitudes.There is no change in the genotype, but there are changes in physiology. https://skepticalscience.com/climate-change-little-ice-age-medieval-warm-period-intermediate.htm13. Changes in CO2 levels may suggest that someone is losing or retaining normal body fluids. These cookies do not store any personal information. Major extinctions have mostly, if not entirely, occurred when the Earth was cold, e.g. Many marine species inhabit coastal waters for some or all of their lives where they are exposed to much wider ranges of pH, CO2, O2, temperature and salinity than occur in the open ocean.Two distinct physiological mechanisms exist whereby adaptation to environmental change can occur much more rapidly than by change in the genotype through genetic evolution.The first of these is phenotypic plasticity, which is the ability of one genotype to produce more than one phenotype when exposed to different environments.19 In other words, a specific genotype can express itself differently due to an ability to respond in different ways to variations in environmental factors.This helps to explain how individuals of the same species with nearly identical genotypes can successfully inhabit very different environments.
This is higher (by far) than at any point in at least the last 800,000 years (CO2 levels have always went up and down between about 200 and 300ppm) 2. Firstly, they reproduce at least annually and sometimes more frequently.This means their progeny are tested on an annual basis for suitability to a changing environment. https://en.wikipedia.org/wiki/Abrupt_climate_change6.
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