NASA has just recorded a historic jump in sea level rise in 2023: 7.6 millimeters.
For comparison, the average rate over the last five years was 4 to 5 millimeters per year.
And over a little more than three decades, the average annual increase is 3.4 millimeters.
However, you must remain cautious.
Variations from one year to the next can be significant but it is not yet certain that this “jump” is indicative of an underlying trend.
To have a less biased vision, specialists prefer to take averages over five years.
Three basic factors affect sea levels: the thermal expansion of water, the melting of mountain glaciers and that of the poles.
With surface temperatures reaching a new record last year and ice melt accelerating, part of the acceleration seen in 2023 could well be attributed to climate change.
But the increase also seems to have been accentuated…
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