The Marine Information System

The IAEA's Marine Information System (MARiS) allows the search and recovery of more than 173,000 measurements of radioactivity and stable isotope data in the marine environment found in seawater, biota, sediment and suspended matter. The MARiS database and web site are maintained and developed by the Radiometrics Laboratory at the IAEA Environment Laboratories (IAEA-EL) in Monaco.

Database Updates

May 2016: HELCOM data updated with the HELCOM 2015 dataset. 12209 new measurements now available through MARiS.
Seawater: 2010 new measurements
Biota: 2999 new measurements
Sediment: 7200 new measurements

July 2015: 27065 new seawater measurements in the North Pacific from the public datasets released by MEXT, NRA and TEPCO.

MEXT (Ministry of Education, Culture, Sports, Science and Technology): 3275 measurements between March 2011 – January 2013.
NRA (Nuclear Regulation Authority): 2437 measurements between May 2013 – February 2015.
TEPCO (Tokyo Electric Power Company): 21353 measurements between March 2011 – January 2014.

May 2015: 2755 new seawater measurements released predominantly in the North Pacific covering the period 2008-2012.

MARiS Development

MARiS User Survey. The MARiS database and website are entering a period of development and upgrade to allow the database to better serve its users. As a user of MARiS your input and comments are essential to help guide and shape this development process. Please consider taking the MARiS User Survey, which will take between 5-15 minutes depending on how much you have used the MARiS website. Your input will help greatly with this development process.

MARiS News

May 2015: Take the MARiS User Survey.

March 2015: MARiS poster presentation at the 23rd Session of the IOC Committee on International Oceanographic Data and Information Exchange (IODE-XXIII), Bruges, Belgium.

November 2014: MARiS poster presentation at the 2nd International Ocean Research Conference, Barcelona, Spain.

October 2014: The MARiS database becomes a member of the RiO5 (Radioactivity in the Ocean, 5 decades later) Working Group