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Since 1970, there has been an increase in stratification in the upper ocean due to global warming and, in some areas, salinity changes. [14] The salinity changes are caused by evaporation in tropical waters, which results in higher salinity and density levels. Meanwhile, melting ice can cause a decrease in salinity at higher latitudes. [14]
This is because ocean warming increases near-surface stratification, subsurface layer is still in equilibrium with the colder climate. This causes the surface amplification to be stronger than older models predicted. [33] An instrument carried by the SAC-D satellite Aquarius, launched in June 2011, measured global sea surface salinity. [34] [35]
Temperature and salinity changes due to global warming and climate change alter the ocean density and lead to changes in vertical stratification. [2] The stratified configuration of the ocean can act as a barrier to water mixing, which impacts the efficiency of vertical exchanges of heat, carbon, oxygen, and other constituents.
Based on the assessment of Coupled Model Intercomparison Project 6 (CMIP6) models, AR6 concluded that it is very likely that, in the long term, global mean ocean precipitation will increase with increasing Global Surface Air Temperature. Annual mean and global mean precipitation will very likely increase by 1–3% per °C warming.
Some climate change effects: wildfire caused by heat and dryness, bleached coral caused by ocean acidification and heating, environmental migration caused by desertification, and coastal flooding caused by storms and sea level rise. 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 ...
Evaporation of ocean water and formation of sea ice further increase the salinity of the ocean. However these processes which increase salinity are continually counterbalanced by processes that decrease salinity, such as the continuous input of fresh water from rivers, precipitation of rain and snow, and the melting of ice. [ 13 ]
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In this case it is synonymous with deep ocean temperature). It is clear that the oceans are warming as a result of climate change and this rate of warming is increasing. [6]: 9 [7] The upper ocean (above 700 m) is warming fastest, but the warming trend extends throughout the ocean. In 2022, the global ocean was the hottest ever recorded by humans.