Overview
I’m a Physicist (Theoretical Physics, Lancaster degree: First including History minor, PhD 1994 and CPhys) and science communicator.
I am interested in data analytics and how we can better identify and explain physical phenomena (chaotic and regular) in the climate system, especially its impact to the biosphere. I'm also a professional member of the UK and Irelands Institute of Physics (IOP), currently as member of Environmental Physics and Nonlinear and Complexity Phyics Groups and have previosly been Chair for the Physics Communicators Group and co-opted to the Women in Physics Group.
I updated our understanding of the ENSO in 2017 & 2018 by identifying the Heartbeat of the Southern Osillation phenomena. This is a ocean-land-atmosphere coupled system. The phenomona explains the presence of low frequency modulation (multidecadal) across the Pacific basin and introduced a new method of spectral analysis to climatic science called dominant frequency state analysis (DFSA).
The spatial wave dispersion characteristics of the Earth system are being investigated with a spatial extension to DFSA (sDFSA) developed through the Models 2 Decisions programme. This is being applied within the Isca simulation environment to help us ascertain how wave modes may alter in the context of tipping point transitions and the teleconnection characteristics that influence precipitation in Sub-Saharan Africa (Sahel) and Asia. Current work also includes extending the general extreme value process approach that I helped develop for the Northern European coastal flooding infrastructure to include climatic teleconnection.
Overall these methods enable the identification of dynamic structure (both climatic modes and teleconnection) and extremes in a physically consistent way across observational, simulated models and paleo reconstruction records.
Current research and science communication work themes:
A) ENSO teleconnection impact to food security risks in Sahel with Geography.
B) ENSO teleconnection and wave dispersion relationships in the Earth system as part of the Climate Science for Service Partnership
China (CSSP).
C) How paleo time scale records help inform contemporary understanding of the Earth system.
D) Non-linear dynamic structure of Earth system modes, hysteresis and extreme value processes.
E) Biological response characteristics in the context of physical forcing (vegetation and planktonic).
F) The transfer of Theoretical Physics knowledge and associated methods into climatic science.
G) Establishing creative and diverse ways to communicate the physics of the Earth system at both an advanced level and at an informed
public and policy level.
Please get in touch if you would like develop a collaboration/ PhD or Internship on any of these topics or to know more about DFSA and extreme process methods and their use.
Publications
Copyright Notice: Any articles made available for download are for personal use only. Any other use requires prior permission of the author and the copyright holder.
| 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2010 | 2002 | 1999 | 1994 |
2024
- Wunderling N, von der Heydt AS, Aksenov Y, Barker S, Bastiaansen R, Brovkin V, Brunetti M, Couplet V, Kleinen T, Lear CH. (2024) Climate tipping point interactions and cascades: a review, Earth System Dynamics, volume 15, no. 1, pages 41-74, DOI:10.5194/esd-15-41-2024.
2023
- Spaiser V, Juhola S, Constantino SM, Guo W, Watson T, Sillmann J, Craparo A, Basel A, Bruun JT, Krishnamurthy K. (2023) Negative Social Tipping Dynamics Resulting from and Reinforcing Earth System Destabilisation, DOI:10.5194/egusphere-2023-1475. [PDF]
- Wunderling N, von der Heydt A, Aksenov Y, Barker S, Bastiaansen R, Brovkin V, Brunetti M, Couplet V, Kleinen T, Lear CH. (2023) Climate tipping point interactions and cascades: A review, volume 2023, pages 1-45, DOI:10.5194/egusphere-2023-1576.
- Bruun J. (2023) Climatic warming changes to Northern European extreme temperature processes over the past 500 years, DOI:10.5194/egusphere-egu23-15117. [PDF]
- Bruun J. (2023) A narrative of climate states as represented through cultural use and re-use of stone in local societies, DOI:10.5194/egusphere-egu23-15987. [PDF]
2022
- Bruun J, Young P, Allen PG, Collins M. (2022) A discussion of Earth's climate sensitivity and its long term dynamics, DOI:10.5194/egusphere-egu22-6540. [PDF]
- Bruun J. (2022) Talking together about climate risks and dynamics so it enables resilience and trust, DOI:10.5194/egusphere-egu22-6631. [PDF]
- Sudakov I, Vakulenko SA, Bruun JT. (2022) Stochastic physics of species extinctions in a large population, Physica A: Statistical Mechanics and its Applications, volume 585, pages 126422-126422, article no. 126422, DOI:10.1016/j.physa.2021.126422. [PDF]
2021
- Shi F, Duan A, Yin Q, Bruun JT, Xiao C, Guo Z. (2021) Modulation of the relationship between summer temperatures in the Qinghai-Tibetan Plateau and Arctic over the past millennium by external forcings, Quaternary Research (United States), volume 103, pages 130-138, DOI:10.1017/qua.2021.3.
- Young PC, Geoffrey Allen P, Bruun JT. (2021) A re-evaluation of the Earth’s surface temperature response to radiative forcing, Environmental Research Letters, volume 16, no. 5, pages 054068-054068, DOI:10.1088/1748-9326/abfa50. [PDF]
- Bruun J. (2021) The story of a tree and what its tells us about our life, DOI:10.5194/egusphere-egu21-6417. [PDF]
- Bruun JT, Sheen K, Collins M. (2021) Mechanisms and effects of dry and wet Sahel epochs, DOI:10.5194/egusphere-egu21-3465. [PDF]
- Cornwell L. (2021) The effects of climate change on population dynamics of the marine copepod Oithona similis.
2020
- Sudakov I, Vakulenko SA, Bruun JT. (2020) Stochastic physics of species extinctions in a large population, DOI:10.48550/arxiv.2007.12784.
- Bruun J, Alejandro A. (2020) Talking about the physics of climate change, what we know and what extra could we do?, DOI:10.5194/egusphere-egu2020-11815. [PDF]
- Bruun J, Evangelou S, Sheen K, Collins M. (2020) Abrupt transitions, wave interactions and precipitation extremes in climate, DOI:10.5194/egusphere-egu2020-11690. [PDF]
- Cornwell LE, Fileman ES, Bruun JT, Hirst AG, Tarran GA, Findlay HS, Lewis C, Smyth TJ, McEvoy AJ, Atkinson A. (2020) Resilience of the Copepod Oithona similis to Climatic Variability: Egg Production, Mortality, and Vertical Habitat Partitioning, Frontiers in Marine Science, volume 7, DOI:10.3389/fmars.2020.00029. [PDF]
2019
- Bruun JT, Evangelou SN. (2019) Anderson localization and extreme values in chaotic climate dynamics. [PDF]
2018
- Skákala J, Bruun JT. (2018) A Mechanism for Pacific Interdecadal Resonances, Journal of Geophysical Research: Oceans, volume 123, no. 9, pages 6549-6561, DOI:10.1029/2018JC013752.
- Cornwell LE, Findlay HS, Fileman ES, Smyth TJ, Hirst AG, Bruun JT, McEvoy AJ, Widdicombe CE, Castellani C, Lewis C. (2018) Seasonality of Oithona similis and Calanus helgolandicus reproduction and abundance: Contrasting responses to environmental variation at a shelf site, Journal of Plankton Research, volume 40, no. 3, pages 295-310, DOI:10.1093/plankt/fby007.
2017
- Bruun JT, Allen JI, Smyth TJ. (2017) Heartbeat of the
S outhernO scillation explainsENSO climatic resonances, Journal of Geophysical Research: Oceans, volume 122, no. 8, pages 6746-6772, DOI:10.1002/2017jc012892. [PDF]
2016
- Queirós AM, Strong JA, Mazik K, Carstensen J, Bruun J, Somerfield PJ, Bruhn A, Ciavatta S, Flo E, Bizsel N. (2016) An Objective Framework to Test the Quality of Candidate Indicators of Good Environmental Status, Frontiers in Marine Science, volume 3, DOI:10.3389/fmars.2016.00073. [PDF]
2015
- Barnes MK, Tilstone GH, Suggett DJ, Widdicombe CE, Bruun J, Martinez-Vicente V, Smyth TJ. (2015) Temporal variability in total, micro- and nano-phytoplankton primary production at a coastal site in the Western English Channel, Progress in Oceanography, volume 137, pages 470-483, DOI:10.1016/j.pocean.2015.04.017. [PDF]
- Tarran GA, Bruun JT. (2015) Nanoplankton and picoplankton in the Western English Channel: abundance and seasonality from 2007–2013, Progress in Oceanography, volume 137, pages 446-455, DOI:10.1016/j.pocean.2015.04.024. [PDF]
2014
- Bruun JT, Allen I, Vichi M, Somerfield P, Samuelsen A, Racault M-F, Waldron H, Monterio P, McKiver W, Bellerby R. (2014) Oceanic biogeochemical characteristic maps identified with holistic use of satellite, model and data, European Geophysical Union, Vienna, 27th Apr - 2nd May 2014, Geophysical Research Abstracts EGU2014-15766, volume 16, no. 2014.
- Smyth TJ, Allen I, Atkinson A, Bruun JT, Harmer RA, Pingree RD, Widdicombe CE, Somerfield PJ. (2014) Ocean Net Heat Flux Influences Seasonal to Interannual Patterns of Plankton Abundance, PLoS ONE, volume 9, no. 6, pages e98709-e98709, DOI:10.1371/journal.pone.0098709. [PDF]
2010
- Young PC, McKenna P, Bruun J. (2010) Identification of non-linear stochastic systems by state dependent parameter estimation, International Journal of Control, volume 74, no. 18, pages 1837-1857, DOI:10.1080/00207170110089824. [PDF]
2002
- Bruun JT, Tawn JA. (2002) Comparison of Approaches for Estimating the Probability of Coastal Flooding, Journal of the Royal Statistical Society Series C: Applied Statistics, volume 47, no. 3, pages 405-423, DOI:10.1111/1467-9876.00118. [PDF]
1999
- Bruun JT, Evangelou SN, Lambert CJ. (1999) Universal level statistics in the presence of Andreev scattering, Journal of Physics: Condensed Matter, volume 7, no. 21, pages 4033-4050, DOI:10.1088/0953-8984/7/21/004. [PDF]
1994
- BRUUN JT, HUI VC, LAMBERT CJ. (1994) CONDUCTANCE FLUCTUATIONS IN MESOSCOPIC SUPERCONDUCTORS, PHYSICA B, volume 194, pages 1623-1624, DOI:10.1016/0921-4526(94)91311-0. [PDF]
- Bruun J, Hui VC, Lambert CJ. (1994) Coherence-length dependence of fluctuations in the conductance of normal-superconducting interfaces, Physical Review B, volume 49, no. 6, pages 4010-4014, DOI:10.1103/physrevb.49.4010. [PDF]