The Shirshov Institute of Oceanology (P.P. Shirshov Institute of Oceanology (IO) RAS, Russian: Институт океанологии им. П. П. Ширшова РАН) is the premier research institution for ocean, climate, and earth science in Russia. It was established in 1946 and is part of the Russian Academy of Sciences. It is headquartered in Moscow.
The institute is named after Pyotr Shirshov, who founded it in 1946. Amongst others, Andrei Monin served as director.
Mathematicians Grigory Barenblatt and Andrei Monin, physical oceanographers Vladimir Shtokman and Leonid Brekhovskikh and biologist Igor Akimushkin have been or are researchers at IORAS.
Explorer and pilot of the MIR submersible to the seabed under the North Pole (a.k.a. the Arktika 2007 project) Anatoly Sagalevich and renowned Russian poet and geologist Alexander Gorodnitsky are also current researchers.
Coordinates: 55°40′37″N 37°34′08″E / 55.67694°N 37.56889°E