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Dr Tytti Erästö
Senior Researcher
Dr Tytti Erästö
Dr Tytti Erästö is a Senior Researcher in the SIPRI Weapons of Mass Destruction Programme.
Her research focuses on nuclear disarmament and nonproliferation issues, including multilateral frameworks such as the Nuclear Non-Proliferation Treaty and the Treaty on the Prohibition of Nuclear Weapons and themes such as the role of nuclear weapons in military alliances, regional arms control and disarmament (Middle East and the Korean peninsula), strategic stability dynamics among nuclear-armed states, and other issues related to nuclear arms control.
Previously she has worked at the Ploughshares Fund in Washington D.C., Harvard Kennedy School’s Belfer Center for Science and International Affairs, the Vienna Center for Disarmament and Non-Proliferation, and the Tampere Peace Research Institute in Finland.
Subject expertise
Bilateral arms control and deterrence, regional risk reduction, multilateral nuclear arms control treaties, Iran nuclear issue, WMD free zone efforts in the Middle East
Regional expertise
Europe, Korean peninsula, Middle East
CONTACT Dr Tytti Erästö
Languages
Finnish, English, Spanish, German, Swedish (elementary Russian and Farsi)
Education
PhD in International Relations, the University of Tampere, Finland
SIPRI COMMENTARY
- Risk reduction is urgently needed amid rising tensions in Northern Europe (Essay, )
- Europe should help repair the damage to non-proliferation and international law from the attacks on Iran (Essay, )
- More investment in nuclear deterrence will not make Europe safer (Essay, )
- Looking beyond the NPT: Next steps in arms control and disarmament (Essay, )
- The logic of avoiding nuclear war (Essay, )
- Time to factor missile defence into nuclear arms control talks (Topical backgrounder, )
- Will Europe’s latest move lead to the demise of the Iran nuclear deal? (Blog, )
- Fifty years of the NPT—cause for celebration or commemoration? (Blog, )
- The NPT and the TPNW: Compatible or conflicting nuclear weapons treaties? (Blog, )
- Dissecting international concerns about Iran’s missiles (Topical backgrounder, )
SIPRI AND PARTNER PUBLICATIONS
- Clearing the Path for Nuclear Disarmament: Confidence-building in the Korean Peninsula (SIPRI, Stockholm: April 2025)
- Reducing the Role of Nuclear Weapons in Military Alliances (SIPRI, Stockholm : June 2024)
- Navigating Security Dilemmas in Indo-Pacific Waters: Undersea Capabilities and Armament Dynamics (SIPRI, Stockholm: June 2024)
- The Role of Umbrella States in the Global Nuclear Order (SIPRI, Stockholm: June 2023)
- The Role of Space Systems in Nuclear Deterrence (SIPRI, Stockholm: September 2023)
- Revisiting ‘Minimal Nuclear Deterrence’: Laying the Ground for Multilateral Nuclear Disarmament (SIPRI, Stockholm: June 2022)
- New Technologies and Nuclear Disarmament: Outlining a Way Forward (SIPRI, Stockholm: May 2021)
- The Arms Control–Regional Security Nexus in the Middle East (SIPRI, Stockholm: April 2020)
- European Non-proliferation Diplomacy in the Shadow of Secondary Sanctions (SIPRI, Stockholm: August 2020)
- Towards Greater Nuclear Restraint: Raising the Threshold for Nuclear Weapon Use (SIPRI, Stockholm: May 2020)
- Addressing Missile Threats in the Middle East and North Africa (SIPRI, Stockholm: November 2020)
- Operationalizing Nuclear Disarmament Verification (SIPRI, Stockholm: April 2019)
- The Lack of Disarmament in the Middle East: A Thorn in the Side of the NPT (SIPRI, Stockholm: January 2019)
- Setting the Stage for Progress towards Nuclear Disarmament (SIPRI, Stockholm: April 2018)
- Opposing Trends: The Renewed Salience of Nuclear Weapons and Nuclear Abolitionism (SIPRI, Stockholm: September 2018)
External publications
- Erästö, T., Arms control in Iran: Preventing a full-blown nuclear crisis, The Clingendael Spectator (April 2020)
- Erästö, T. and Azodi, S., Instead Of Adding Onto Iran Sanctions, Europe Should Prevent Disaster, LobeLog (16 May 2018)
- Erästö, T. and Azodi, S., Don't Let Misplaced Concerns Over Missiles Jeopardize Iran Deal, LobeLog (10 Nov 2017)
- Erästö, T., Saetren, W. and Wilson, G., Breaking Down the North Korea Crisis, War is boring (Aug 2017)
- Erästö, T., Time to Change U.S. Approach on the Nuclear Weapons Ban, The Hill (23 July 2017)
- Erästö, T., Europe’s Overlooked Missile Defence Dilemma, European Leadership Network (20 July 2017)
- Erästö, T., Between the Shield and the Sword: NATO’s Overlooked Missile Defense Dilemma, Ploughshares Fund report (June 2017)
- Erästö, T., Leave Nuclear Tomahawks Where They Belong—in the ‘80s, The Hill (18 May 2017)
- Erästö, T., Why Coercion Is a Recipe for Failure with Iran, LobeLog (17 Jan 2017)
- Erästö, T., Trump Needs Iran Deal to Engage Russia and North Korea, The National Interest (7 Dec 2016)
- Erästö, T. and Cirincione, J., Trump Should Halt US Missile-Defense Plans in Europe, Defense One (28 Nov 2016)
- Erästö, T., Press Pause on Missile Defense in Europe.10 Big Nuclear Ideas for the Next President, Ploughshares Fund report (Nov 2016)
- Erästö, T., Taking Stock of Ten Years of the GICNT, Nuclear Security Matters, Belfer Center for Science and International Affairs, Harvard University (14 June 2016)