Photo Gallery: Rising Seas or Sinking Islands?
06/15/2012
Valérie Ballu, 44, is a geodesist on the team. Geodesy is the science of...
Gerald Traufetter/ DER SPIEGEL

ValÚrie Ballu, 44, is a geodesist on the team. Geodesy is the science of measuring the Earth. She uses GPS equipment to precisely measure changes in the island's elevation over time.