Record greenhouse gas concentrations and sea level in 2021

The National Oceanic and Atmospheric Administration’s (NOAA) annual State of the Climate report ( PDF) says that both greenhouse gas concentrations in Earth’s atmosphere and sea levels hit record highs in 2021, showing that despite efforts to curb greenhouse gas emissions, climate The trend of change has not slowed down. NOAA said the concentration of greenhouse gases in the atmosphere in 2021 will be 414.7 ppm, which is 2.3 ppm higher than in 2020. This concentration is “the highest for at least the past 1 million years according to the paleoclimate record”. In addition, Earth’s sea level rose for the tenth year in a row, setting a new record of 97 mm above the average in 1993 when satellite measurements began. Last year was one of the six warmest years on record since the mid-19th century, and the past seven have all been the warmest on record, the report said. The Paris Climate Agreement, signed in 2015, set a goal of limiting global warming to 1.5°C above pre-industrial levels to avoid the worst impacts of climate change, but the current state of the planet makes it impossible to achieve this goal. There is still a lot of difficulty.

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