"S Prasanna Kumar, Chief Scientist at CSIR-NIO has taken charge as Acting Director of CSIR-NIO, with effect from September 1, 2016 on superannuation of S W A Naqvi," NIO said in a statement.
Kumar, a physical oceanographer, is a chief scientist and head of physical oceanography division at the NIO.
"He has more than 30 years of experience in carrying out multi-disciplinary, multi-institutional studies of national and international importance," the statement said.
He was selected as an Outstanding Scientist in 2010, and took over as the Director of the Institute in 2012.