Finds a MASLT is about 1 mm / yr in global sea level reconstructions that is more than half of the total observed sea level trend during the XXth century (climatesignals.org)
In examining the record of sea level rise for the past two millennia — this was the first continuous sea level reconstruction of the time period, it should be noted — the scientists found that sea level was relatively stable from 200 BCE to 1000 CE. (treehugger.com)
That is why, as stated in the paper, the sea level reconstruction appears to suggest that temperatures during AD 500-1000 were not as warm as indicated in the M08 reconstruction (about 0.2 C or so cooler on average). (realclimate.org)