Tytti Erästö

Jun 27, 2024 | sipri.org | Tytti Erästö |Fei Su |Wilfred Wan

Dr Tytti Erästö, Fei Su and Dr Wilfred Wan Publisher: SIPRI This paper examines the drivers and implications of naval build-ups in the Indo-Pacific, considering key actors’ security objectives and threat perceptions, as well as the interplay of regional dynamics and strategic relations between nuclear-armed states.

Jun 4, 2024 | sipri.org | Tytti Erästö

This paper examines the role of nuclear weapons in military alliances, focusing on the perspectives of the so-called umbrella states—that is, allied states that do not have their own nuclear weapons but are part of the ‘extended nuclear deterrence arrangements’ of a nuclear-armed patron. After analysing allied security thinking and highlighting the underlying assumptions about nuclear deterrence, the paper subjects some of those assumptions to critical scrutiny.

Sep 11, 2023 | sipri.org | Tytti Erästö

On 29–30 August, SIPRI hosted a two-day workshop focusing on the significance of nuclear weapons in the North Atlantic Treaty Organization’s (NATO) deterrence strategy. This event brought together experts and scholars to delve into nuclear policy and security dynamics in Northern Europe. The workshop was led by Dr Tytti Erästö, SIPRI Senior Researcher, and hosted participants from Denmark, Finland, Iceland, Norway and Sweden.

Jun 7, 2023 | sipri.org | Tytti Erästö

This paper focuses on countries under extended nuclear deterrence arrangements, or ‘umbrella’ states. The paper explores the ways in which umbrella states both in the Asia-Pacific region and in Europe have supported prevailing nuclear deterrence practices or distanced themselves from such practices.