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Since the start of the Industrial Revolution, atmospheric CO 2 concentration have been increasing, causing global warming and ocean acidification. [12] In October 2023 the average level of CO 2 in Earth's atmosphere, adjusted for seasonal variation, was 422.17 parts per million by volume (ppm). [13]
Ocean acidification is the increasing acidification of the oceans, caused mainly by the uptake of carbon dioxide from the atmosphere. [88] The rise in atmospheric carbon dioxide due to the burning of fossil fuels leads to more carbon dioxide dissolving in the ocean. When carbon dioxide dissolves in water it forms hydrogen and carbonate ions.
Carbon dioxide and methane are examples of greenhouse gases. The additional greenhouse effect leads to ocean warming because the ocean takes up most of the additional heat in the climate system. [3] The ocean also absorbs some of the extra carbon dioxide that is in the atmosphere. This causes the pH value of the seawater to drop. [4]
The Arctic Ocean's ability to absorb carbon dioxide from the atmosphere appears to be waning due to melting permafrost and worsening coastal erosion. Arctic ocean may absorb less CO2 than ...
Climate change is raising ocean temperatures [31] and raising levels of carbon dioxide in the atmosphere. These rising levels of carbon dioxide are acidifying the oceans . [ 32 ] This, in turn, is altering aquatic ecosystems and modifying fish distributions, [ 33 ] with impacts on the sustainability of fisheries and the livelihoods of the ...
Climate change can be mitigated by reducing the rate at which greenhouse gases are emitted into the atmosphere, and by increasing the rate at which carbon dioxide is removed from the atmosphere. [270] To limit global warming to less than 1.5 °C global greenhouse gas emissions needs to be net-zero by 2050, or by 2070 with a 2 °C target. [271]
Ocean acidification means that the average seawater pH value is dropping over time. [1]Ocean acidification is the ongoing decrease in the pH of the Earth's ocean.Between 1950 and 2020, the average pH of the ocean surface fell from approximately 8.15 to 8.05. [2]
Carbon dioxide and methane are examples of greenhouse gases. The additional greenhouse effect leads to ocean warming because the ocean takes up most of the additional heat in the climate system. [86] The ocean also absorbs some of the extra carbon dioxide that is in the atmosphere. This causes the pH value of the seawater to drop. [87]