All aircrafts in the U.S. and Canada flying 18,000 feet above the mean sea level are required to have the same altimeter settings of 29.92 inHg.

Overall, global sea levels have risen by four inches since 1993, according to the 2024 study. Global mean sea level (in blue) since 1993. The solid red line indicates the trajectory of this increase.

Sea Level Rise All across the world, sea levels are expected to rise in response to climate change. However, for the state of Delaware, sea level rise is especially concerning due to the state’s flat ...

This threshold could mean “ice-less” summers in the Arctic Ocean and a sea-level rise along coastal communities, possibly impacting six million people, according to the United Nations.