The atmosphere and oceans have warmed, the amount of snow and ice has diminished, sea levels have risen, and the concentration of carbon dioxide has increased.
The value of 615 ppm above the outdoor concentration indicates approximately 15 cubic feet per minute of outdoor air per adult occupant doing sedentary office work where outdoor air contains 385 ppm, the current global average atmospheric CO2 concentration.
For example, if we want to stabilize the density of carbon dioxide in the atmosphere at a level about twice as high as it was before the industrial revolution, it will be necessary to reduce global per capita carbon dioxide emissions to one ton by the year 2100.
Matthew Smith and Samuel Myers examine the impact of elevated CO2 levels on iron, protein and zinc sufficiency among the populations of 151 countries using an age- and sex-stratified model of availability for 225 different foods.
Our music video"Climate," one of the productions to emerge from this initiative, depicts year-to-year shifts in carbon dioxide concentrations and atmospheric temperature graphically, in charts, with a music accompaniment, spanning from the early 1900s up to the year 2250.
Although previous models have been able to reproduce this pattern, many require knowledge of numerous inputs, such as carbon dioxide concentrations, and none has been able to fully account for the pattern and timing of interglacials over the past million years.
Not only climate change but widespread soil erosion and ocean acidification, among other crises, correlate with global peaks in overall consumption, atmospheric carbon dioxide levels and species extinctions that have already led to system-level collapses in multiple forestry and fishery industries.
At this unprecedented moment in human history, trend lines of various ecological measures(for instance the“keeling curve”, which has plotted the concentration of carbon dioxide in Earth's atmosphere since 1958) are the signatures of our collective politics.
Coral is playing important roles as homes and places to lay eggs for fish, and as barriers to protect beaches, and, moreover, it is also deeply involved in the adjustment of the density of carbon dioxide in the sea. Between 1997 and 1998, catastrophic damage was caused to the coral by bleaching due to worldwide high water temperature and the coral of Okinawa had also been affected.
Earth's carbon concentrations have soared to levels not seen in 800,000 years One NOAA oceanographer warns that even if humanity"stopped the greenhouse gases at their current concentrations today, the atmosphere would still continue to warm for next couple decades to maybe a century," writes Jessica Corbett for Common Dreams 1.
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