On January 1, 2020, mk and wasoxygen agreed to a wager regarding global average sea level in the year 2040. They agreed that the loser of the wager would send 1 ETH to the winner.
mk bet that on January 1, 2040 the satellite measure of global average sea level, according to NASA, would be 402 or more millimeters higher than the January 1993 satellite measure of global average sea level.
wasoxygen bet that on January 1, 2040 the satellite measure of global average sea level, according to NASA, would be less than 402 millimeters higher than the January 1993 satellite measure of global average sea level.
When designing the wager, both parties agreed to the NASA website https://climate.nasa.gov/vital-signs/sea-level/ as a reliable data source. However, both parties agree that the website may not persist, and that the best match for "Data source: Satellite sea level observations; Credit: NASA Goddard Space Flight Center" should be used on January, 1 2040.
For posterity, at the time this wager was made, NASA reported the satellite measure of global average sea level to be 95.2 mm higher than the January 1993 measurement. At the time of this post (September 20, 2021) NASA reports the satellite measure of global average sea level to be 99 mm higher than the January 1993 measurement.