Global sea level NOAA Global Sea Level different measurements Global sea level https://tidesandcurrents.noaa.gov/sltrends/faq.htm Global sea level trends and relative sea level trends NOAA NOAA says : What is sea level? http://tidesandcurrents.noaa.gov/sltrends/faq.htm https://tidesandcurrents.noaa.gov/sltrends/faq.htm#q2 tidesandcurrents.noaa.gov...