Coastal sea levels were 84 mm higher in 2021 than the average over the period from 1993 to 2011, the National Marine Environmental Monitoring Center said in an annual bulletin.
The long-term effects of such rise include erosion of coastal ecosystems and the loss of tidal flats, while coastal cities face greater risks of floods and salt tides, said the center, a research unit of the national resources ministry. Although the temperatures of China’s coastal waters fell slightly in 2021 from the previous year, they were still the third highest on record and 0.84 degrees Celsius above the 1993-2011 average.
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