It turns out that the current of the whole earth is faster than 20 years ago
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Past research has revealed that the temperature of the ocean has risen sharply, but from the results of a simulation of ocean currents across the globe based on enormous amounts of observational data, it was further stated that ocean currents across the globe were Is accelerating. '
Deep-reaching acceleration of global mean ocean circulation over the past two decades | Science Advances
https://advances.sciencemag.org/content/6/6/eaax7727
Global warming is speeding up Earth's massive ocean currents | Science | AAAS
https://www.sciencemag.org/news/2020/02/global-warming-speeding-earth-s-massive-ocean-currents
Ocean currents are getting faster | Live Science
Ocean Circulation Accelerating, From Surface to Abyss
https://www.courthousenews.com/ocean-circulation-accelerating-from-surface-to-abyss/
The ocean current is accelerating globally and was discovered by a group of oceanographers Shijian Hu and others at the Qingdao Ocean Research Institute of the Chinese Academy of Sciences. Previous studies have confirmed that global warming is changing ocean currents in multiple waters, but did not reveal trends globally. Then, the research group floated about 4,000 observation floats around the world and acquired observation records from the ARGO project, which collects data such as sea temperature, salinity, and flow velocity up to a depth of 2000 m. In addition, we have investigated changes in ocean currents since 1990 by combining five observation data conducted by research institutions around the world and 12 simulations.
As a result, it was confirmed that the kinetic energy of the ocean current increased about 15% every 1990 from 1990 to 2013. The increase in kinetic energy has reached about 76% of the world's oceans.
Below is a diagram of the world's oceans where the current is accelerating in orange, and where it is decelerating in blue. Most of the sea areas are colored orange, indicating that the currents of the oceans are increasing globally.
The research group believes that the immediate cause of the accelerated ocean current is 'increased wind speed caused by global warming.' In the past, it was thought that global warming would rather slow down the movement of the wind. This is because polar regions such as the Arctic warm more strongly than near the equator, so it was thought that the temperature gradient between the polar region and the equator would be smaller, and the movement of the atmosphere would be slower. In fact, from 1970 to 2010, wind speeds were decreasing globally, and this phenomenon was called '
However, since 2010, it has been confirmed that the wind speed has increased, which reverses the “global decay” hypothesis.
There is a possibility that the amount of wind power generation will increase dramatically as the wind becomes stronger year by year-gigazine
by Oimheidi
It is not clear why the wind speed, which had declined over 40 years, has increased since 2010, but the research group said, 'The increase in wind speed is much greater than can be explained by natural fluctuations.' Determined. We concluded that global warming was the main cause.
The research group believes that 'acceleration of ocean currents is caused by global warming', but also points out that 'acceleration of ocean currents also accelerates global warming'. For example, as tropical currents accelerate, warm seawater will be transported to larger areas. The sea absorbs carbon dioxide, but carbon dioxide is hardly soluble in hot water, so if the temperature of seawater rises over a wide area due to the acceleration of ocean currents, the amount of carbon dioxide absorbed by the sea will also decrease.
Michael McFadden, co-author of the dissertation, said, `` Since the southern equatorial current in the Pacific Ocean moves so slowly that it moves only one mile per hour (about 1.6 km), even if it accelerates, it will be about 0.08 km / h in 10 years. However, given the huge volume of seawater, even this much acceleration requires tremendous energy, which cannot be explained by natural changes and caused by global warming. Is likely to be the case. '
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