How is mean sea level irrelevant? Global warming directly affects the mean sea level. You don't need to go around measuring surface area/volume of ocean,ice and

How is mean sea level irrelevant? Global warming directly affects the mean sea level. You don't need to go around measuring surface area/volume of ocean,ice and land and what not! All you need is to calculate the mean sea level and compare it with historical data. And your theory on tidal effects of the moon falls flat because mean sea level takes all those factors into consideration! How? The name itself suggests that it's a "mean" over all variations in the sea levels due to tidal or inundation effects. Unless the gravitational pull of the moon dramatically increased or the moon got closer to the Earth your theory makes some sense. But the effects are pretty uniform. So mean sea level is the only meaningful statistic here. It's real and measurable. Everything else is bogus claims by climate change deniers!