Replies

Perhaps. As great as. Could see, would see, might be, may be ...

The actual measured global average sea level rise remains constant at 2.3 to 2.4 mm per year.
1 inch per decade.
10 inches per hundred years.
1 meter (40 inches) in 400 years.
And those projections ONLY IF the current temperature continues to rise for the next 400 years.

Historically, we are naturally beginning just the latest in many “maximum points” of the earth’s 900-1000 year long-term temperature cycle: These maximums occurred before during the Egyptian Optimum (3000 BC),
Stonehenge Period (2000 BC),
the Minoan Warming Period (1000 BC),
the Roman Warming Period (100 BC-00 AD),
the Medieval Warming Period (1100-1200 AD),
and now today’s Modern Warming Period (2000-2100 AD.)

January’s actual measured global average temperature measurements by satellite (to measure above ALL of the earth at the same time in each orbit) including arctic, antarctic, oceans, tropical jungles, ice fields, tundra, plains, steppes, farm land and cities and forests was 0.03 higher than the year 2000 baseline. 1/3 of one degree higher than the same measurement in 1979. Now 43 years of “catastrophic global warming” and we are only 1/3 of one degree higher than when accurate measurement began.

Just remember: “10 inches in 100 years.”
1/3 of one degree in 43 years. “Less than 1 degree per 100 years.”

Agreed. I'll worry about the rising sea levels when Pisa, Italy is a seaport again like it was during the Medieval Warm Period, or Ephesus is a seaport again like it was during the Roman Warm Period and the Minoan Warm Period.

Not only is the Modern Warm Period evidently not as warm as the Medieval Warm Period and Roman Warm Period (based on historical sea levels), at least not yet. But it's possible that we're in a downward trend where each of the recent warm periods didn't get as warm as the prior ones. For example, because Pisa, Italy and Pevensey Castle in the UK had coastlines during the Medieval Warm Period but don't now, that suggests the Modern Warm Period hasn't gotten as warm as the warmest points of the Medieval Warm Period. And because Ephesus ceased to have a coastline during the Dark Age and didn't have it restored during the Medieval Warm Period, that suggests the Medieval Warm Period didn't get as warm as the Roman Warm Period and Minoan Warm Period before it (when Ephesus was a seaport city).

Summarized: yes we're in the Modern Warm Period and yes sea levels are rising a teensy weensy bit and yes it might last a couple of more centuries (assuming the Modern Warm Period lasts 400 to 600 years like the prior warm periods did). But it won't rise enough to be a big deal, just like the prior warm periods didn't. If we lived long enough to see the Modern Warm Period's maximum, I'd be surprised if that was as high as the prior warm periods.