Dr Tillys Petit
Biography
- Variability and connectivity of the Atlantic Meridional Overturning Circulation (AMOC)
- Relationships between atmosphere, sea ice and ocean dynamics
- Impact of surface forced water mass transformation on ocean dynamics
- Role of topography in modulating the ocean circulation
Full publications list / Links
- RREX2017 – hydrographic cruise along and across the Reykjanes Ridge – R/V Atalante
- RAPID cruises 2024 and 2026 – Mooring recovery and deployment along the eastern and western boundaries at 26degN – RRS Discovery
- Evan Hambly (current): The role of ocean mixing in driving deep convection in the North Atlantic subpolar gyre
- Manuel Torres Godoy (current): Ocean circulation and microstructure over the Reykjanes Ridge
- Genia V Fernanda (MSc – 2024): Does The Time Series of the Atlantic Meridional Overturning Circulation (AMOC) at 26°N Enable Improved Sub-Annual Predictions of Atlantic Sea-Surface Temperatures?
- Nathan Ng (Undergraduate – 2023): Investigating future changes in North Atlantic sea surface temperature
- Shelby Mantle (Undergraduate – 2022): Role of abrupt changes in temperature over the North Atlantic ocean on future changes to West Africa precipitation
Award
Engagement highlights
- Channel 4: Collapse of this Atlantic current could change Europe's climate forever
- BBC south today : Observing the Atlantic Meridional Overturning Circulation (AMOC)
- Le Point (French Media): The Day the Heart of the Ocean Stops Beating
- Into The Blue podcast: Why Ocean Models Are Key In Unlocking The AMOC's Future
Projects
SNAP-DRAGON – Subpolar North Atlantic Processes - Dynamics and pRedictability of vAriability in Gyre and OverturNing
Publications
Harmon, Nicholas 
ORCID: https://orcid.org/0000-0002-0731-768X; Rychert, Catherine A. ORCID: https://orcid.org/0000-0001-5071-793X; Moat, Ben ORCID: https://orcid.org/0000-0001-8676-7779; Smeed, David ORCID: https://orcid.org/0000-0003-1740-1778; Frajka‐Williams, Eleanor ORCID: https://orcid.org/0000-0001-8773-7838; Petit, Tillys ORCID: https://orcid.org/0000-0002-7922-9363; Walker, Martin; Provost, Paul; Thomas, Tina.
2026
Implications for oceanographic and seafloor geodetic applications due to settling of self‐calibrating bottom pressure recorders.
Geophysical Research Letters, 53 (1).
10.1029/2025GL117927
2026
Article
Li, Feili ORCID: https://orcid.org/0000-0002-3073-9813; Fu, Yao ORCID: https://orcid.org/0000-0003-2227-3694; Petit, Tillys; Zou, Sijia ORCID: https://orcid.org/0000-0003-2998-2469.
2026
Strengthening of Labrador Sea overturning linked to subsurface freshening over recent decades.
Geophysical Research Letters, 53 (1).
10.1029/2025GL118605
2026
Article
Smeed, D. A. ORCID: https://orcid.org/0000-0003-1740-1778; Johns, W. E.; Smith, R. H. ORCID: https://orcid.org/0000-0001-9824-6989; Petit, T. ORCID: https://orcid.org/0000-0002-7922-9363; McDonagh, E. L.; Rayner, D. ORCID: https://orcid.org/0000-0002-2283-4140; Volkov, D. L. ORCID: https://orcid.org/0000-0002-9290-0502; Elipot, S.; Kajtar, J. B. ORCID: https://orcid.org/0000-0003-0114-6610; King, B. A. ORCID: https://orcid.org/0000-0003-1338-3234; Firing, Y. L. ORCID: https://orcid.org/0000-0002-3640-3974; Moat, B. I. ORCID: https://orcid.org/0000-0001-8676-7779.
2026
Overturning Circulation of the North Atlantic Subtropical Gyre Computed in Density Coordinates at 26°N.
Geophysical Research Letters, 53 (5).
10.1029/2025GL118277
2026
Article
Petit, T. ORCID: https://orcid.org/0000-0002-7922-9363; Smeed, D. ORCID: https://orcid.org/0000-0003-1740-1778; Blaker, A. ORCID: https://orcid.org/0000-0001-5454-0131; Elipot, S.; Johns, W.; Kajtar, J. B. ORCID: https://orcid.org/0000-0003-0114-6610; Rayner, D. ORCID: https://orcid.org/0000-0002-2283-4140; Sinha, B. ORCID: https://orcid.org/0000-0002-7303-3175; Smith, R. H. ORCID: https://orcid.org/0000-0001-9824-6989; Volkov, D. L. ORCID: https://orcid.org/0000-0002-9290-0502; Moat, B. ORCID: https://orcid.org/0000-0001-8676-7779.
2025
Evaluation of a reduced RAPID array for measuring the AMOC.
Journal of Geophysical Research: Oceans, 130 (11).
10.1029/2025JC023093
2025
Article
McCarthy, G. D.; Graham, J. A.; Hermanson, L.; Hodge, K. R.; Moat, B. I. ORCID: https://orcid.org/0000-0001-8676-7779; Moffa-Sanchez, P.; Petit, T.; Robson, J..
2025
Climate change impacts on ocean
circulation relevant to the UK and Ireland.
MCCIP Ocean Circulation Review.
35, pp.
10.14465/2025.reu05.cir
2025
Article
Petit, T. ORCID: https://orcid.org/0000-0002-7922-9363; Robson, J. ORCID: https://orcid.org/0000-0002-3467-018X; Ferreira, D. ORCID: https://orcid.org/0000-0003-3243-9774; Yeager, S. ORCID: https://orcid.org/0000-0003-0268-9895; Evans, D. G. ORCID: https://orcid.org/0000-0002-6328-4093.
2025
Coherence of the AMOC over the subpolar North Atlantic on interannual to multiannual time scales.
Geophysical Research Letters, 52 (9).
10.1029/2025GL115171
2025
Article
Moat, B.I. ORCID: https://orcid.org/0000-0001-8676-7779; Petit, Tillys; Firing, Yvonne ORCID: https://orcid.org/0000-0002-3640-3974.
2025
RAPID 26N Report for RRS Discovery
research Expedition DY186, 10th Dec 2024 to 19th Dec 2024.
Southampton, National Oceanography Centre.
(National Oceanography Centre Research Expedition Report, 85)
2025
Monograph
Fu, Yao ORCID: https://orcid.org/0000-0003-2227-3694; Lozier, M. Susan; Majumder, Sudip ORCID: https://orcid.org/0000-0002-0431-2189; Petit, Tillys.
2024
Water mass transformation and its relationship with the overturning circulation in the eastern subpolar North Atlantic.
Journal of Geophysical Research: Oceans, 129 (12).
10.1029/2024JC021222
2024
Article