From 2004 to 2007 she was a lead author of the Intergovernmental Panel on Climate Change (IPCC) Working Group and a lead author of the Fourth Assessment Report Working Group I chapter of the group's final report titled: "Observations: Oceanic Climate Change and Sea Level", which was released in February 2007. The report earned contributing scientists a share of the Nobel Peace Prize later that year. She was also a lead author on the same topic for the Fifth Assessment Report.()