Common Era

Common Era (CE) is the secular time scale used in sea-level reconstructions to label calendar years since year 1, with Before Common Era (BCE) for earlier years, numerically equivalent to AD and BC. Paleo sea-level studies state proxy ages and reconstruction windows in CE, for example the Common Era sea-level synthesis spanning roughly 0 to 2000 CE that places twentieth-century rise as the fastest in at least 3,000 years. CE is preferred over BP (before present, fixed at 1950) when results align with the instrumental tide-gauge era, because it joins the proxy record continuously to dated historical and modern observations.