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Carbon dioxide in Earth's atmosphere
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In Earth's atmosphere, carbon dioxide is a trace gas that plays an integral part in the greenhouse effect, carbon cycle, photosynthesis and oceanic carbon cycle. It is one of several greenhouse gases in the atmosphere of Earth. The current global average concentration of carbon dioxide (CO2) in the atmosphere is 421 ppm as of May 2022 (0.04%). This is an increase of 50% since the start of the Industrial Revolution, up from 280 ppm during the 10,000 years prior to the mid-18th century. The increase is due to human activity.
Carbon dioxide observations from 2008 to 2017 showing the seasonal variations and the difference between northern and southern hemispheres
Carbon dioxide observations from 2008 to 2017 showing the seasonal variations and the difference between northern and southern hemispheres
This diagram of the fast carbon cycle shows the movement of carbon between land, atmosphere, and oceans in billions of metric tons of carbon per year.
This diagram of the fast carbon cycle shows the movement of carbon between land, atmosphere, and oceans in billions of metric tons of carbon per year. Yellow numbers are natural fluxes, red are human contributions, white are stored carbon.
Correspondence between temperature and atmospheric CO2 during the last 800,000 years
Correspondence between temperature and atmospheric CO2 during the last 800,000 years
Image: 062821Yreka Fire Cal Fire 2wiki
Image: 062821Yreka Fire Cal Fire 2wiki
Effects of climate change
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Effects of climate change are well documented and growing for Earth's natural environment and human societies. Changes to the climate system include an overall warming trend, changes to precipitation patterns, and more extreme weather. As the climate changes it impacts the natural environment with effects such as more intense forest fires, thawing permafrost, and desertification. These changes impact ecosystems and societies, and can become irreversible once tipping points are crossed.
New Orleans submerged after Hurricane Katrina, September 2005
New Orleans submerged after Hurricane Katrina, September 2005
A dry lakebed in California. In 2022, the state was experiencing its most serious drought in 1,200 years, worsened by climate change.
A dry lakebed in California. In 2022, the state was experiencing its most serious drought in 1,200 years, worsened by climate change.
Climate change causes a drop in the ocean's pH value (called ocean acidification): Time series of atmospheric CO2 at Mauna Loa (in parts per million v
Climate change causes a drop in the ocean's pH value (called ocean acidification): Time series of atmospheric CO2 at Mauna Loa (in parts per million volume, ppmv; red), surface ocean pCO2 (μatm; blue) and surface ocean pH (green) at Ocean Station ALOHA in the subtropical North Pacific Ocean.
Part of the Great Barrier Reef in Australia in 2016 after a coral bleaching event (partly caused by rising ocean temperatures and marine heatwaves).
Part of the Great Barrier Reef in Australia in 2016 after a coral bleaching event (partly caused by rising ocean temperatures and marine heatwaves).