Papers

Martin Rypdal

Professor/Department Head

Department of Mathematics and Statistics

UiT The Arctic University of Norway

- Rypdal, V., E. D. Arnstad, K. Aalto, L. Berntson, M. Ekelund, A. Fasth, M. Glerup, T. Herlin, S. Nielsen, S. Peltoniemi, M. Zak, M. Rygg, M. Rypdal, E. Nordal, Predicting unfavorable long-term outcome in Juvenile Idiopathic Arthritis: Results from the Nordic cohort study, accepted in Arthritis Research & Therapy.

- Rypdal, M., H.-B. Fredriksen, K. Rypdal and R. Steene, Emergent constraint on equilibrium climate sensitivity is an artefact of historical forcing (preprint)

- Kawasaki paper (preprint)

- Dengue paper (preprint)

- Fredriksen, H-.B. and M. Rypdal, Long-range persistence in global surface temperatures explained by linear multi-box energy balance models, Journal of Climate, in press.

- Theodorsen A., O. E. Garcia and M. Rypdal, Statistical properties of a filtered Poisson process with additive random noise: distributions, correlations and moment estimation, Physica Scripta, 2017, 92(5), 054002.

- Rypdal, M. and K. Rypdal, Late Quaternary temperature variability described as abrupt transitions on a 1/f noise background. Earth System Dynamics, 2016. 7: p. 281-293.

- Rypdal, M., Early-Warning Signals for the onsets of Greenland Interstadials and the Younger Dryas-Preboreal transition. Journal of Climate, 2016. 29(11): p. 4047-4056.

- Løvsletten, O. and M. Rypdal, Statistics of Regional Surface Temperatures after 1900: Long-Range versus Short-Range Dependence and Significance of Warming Trends, Journal of Climate, 2016. 29(11): p. 4057-4068.

- Rypdal, K. and M. Rypdal, Comment on "Scaling regimes and linear/nonlinear responses of last millennium climate to volcanic and solar forcing" by S. Lovejoy and C. Varotsos. Earth System Dynamics Discussions, 2016.

- Rypdal, K., M. Rypdal, and S. Holm, Detection and attribution: how is the solar signal identified and distinguished from the response to other forcings?, in Earth's climate response to a changing Sun. 2015, EDP Sciences. p. 345.

- Rypdal, K., M. Rypdal, and H.-B. Fredriksen, Spatiotemporal long-range persistence in earth's temperature field: Analysis of stochastic-diffusive energy balance models. Journal of Climate, 2015. 28(21): p. 8379-8395.

- Rypdal, K. and M. Rypdal, Modeled impact of total solar irradiance (TSI) forcing, in Earth's climate response to a changing Sun. 2015, EDP Sciences. p. 345.

- Østvand, L., K. Rypdal, and M. Rypdal, Statistical significance of rising and oscillatory trends in global ocean and land temperature in the past 160 years. Earth System Dynamics Discussions, 2014. 5: p. 327-362.

- Østvand, L., T. Nilsen, K. Rypdal, D. Divine, V., and M. Rypdal, Long-range memory in internal and forced dynamics of millennium-long climate model simulations. Earth System Dynamics, 2014. 5(2): p. 295-308.

- Rypdal, M. and K. Rypdal, Long-memory effects in linear response models of Earth's temperature and implications for future global warming. Journal of Climate, 2014. 27(14): p. 5240-5258.

- Rypdal, M., E. Sirnes, O. Løvsletten, and K. Rypdal, Assessing market uncertainty by means of a time-varying intermittency parameter for asset price fluctuations. Physica A: Statistical Mechanics and its Applications, 2013: p. 8.

- Rypdal, M. and O. Løvsletten, Modeling electricity spot prices using mean-reverting multifractal processes. Physica A: Statistical Mechanics and its Applications, 2013. 392(1): p. 194-207.

- Rypdal, K., L. Østvand, and M. Rypdal, Long-range memory in Earth's surface temperature on time scales from months to centuries. Journal of Geophysical Research - Atmospheres, 2013. 118(13): p. 7046-7062.

- Rypdal, M. and K. Rypdal, Is there long-range memory in solar activity on timescales shorter than the sunspot period? Journal of Geophysical Research - Space Physics, 2012. 117: p. 11.

- Rypdal, K. and M. Rypdal, Stochastic properties of solar activity proxies. Astrophysics and Space Science Proceedings, 2012. 33: p. 227-232.

- Løvsletten, O. and M. Rypdal, Approximated maximum likelihood estimation in multifractal random walks. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, 2012. 85(4): p. 8.

- Rypdal, M. and K. Rypdal, Discerning a linkage between solar wind turbulence and ionospheric dissipation by a method of confined multifractal motions. Journal of Geophysical Research - Space Physics, 2011. 226: p. A02202.

- Rypdal, K., B. Klumov, B. Kozelov, R. Kube, and M. Rypdal, Exploring the Analogy Between Freezing of a 2D Yukawa Liquid and 2D Decaying Turbulence in Fluids. AIP Conference Proceedings, 2011. 1397(1): p. 72-77.

- Hall, C., K. Rypdal, and M. Rypdal, The E region at 69 degrees N, 19 degrees E: Trends, significances, and detectability. Journal of Geophysical Research - Space Physics, 2011. 116: p. A05309.

- Rypdal, M. and K. Rypdal, Testing Hypotheses about Sun-Climate Complexity Linking. Physical Review Letters, 2010. 104(12): p. 4.

- Rypdal, M. and K. Rypdal, Stochastic modeling of the AE index and its relation to fluctuations in B-z of the IMF on time scales shorter than substorm duration. Journal of Geophysical Research - Space Physics, 2010. 115: p. 15.

- Rypdal, M. and K. Rypdal, Rypdal and Rypdal reply. A Reply to the Comment by Nicola Scafetta and Bruce J. West. Physical Review Letters, 2010. 105(21): p. 219802.

- Rypdal, M. and K. Rypdal, A stochastic theory for temporal fluctuations in self-organized critical systems. New Journal of Physics, 2008. 10: p. 123010/1-11.

- Rypdal, K., B.V. Kozelov, S. Ratynskaia, B. Klumov, C. Knapek, and M. Rypdal, Scale-free vortex cascade emerging from random forcing in a strongly coupled system. New Journal of Physics, 2008. 10: p. 093018.

- Rypdal, K., M. Rypdal, T. Zivkovic, and B.V. Kozelov, Complexity in astro and geospace systems: the turbulence versus SOC controversy. AIP Conference Proceedings, 2007. 932: p. 203-208.

- Kruglikov, B.S. and M. Rypdal, Entropy via multiplicity. Discrete and Continuous Dynamical Systems, 2006. 16: p. 395-410.

- Kruglikov, B.S. and M. Rypdal, Dynamics and entropy in the Zhang model of self-organized criticality. Journal of statistical physics, 2006. 122.

- Kruglikov, B.S. and M. Rypdal, A piece-wise affine contracting map with positive entropy. Discrete and Continuous Dynamical Systems, 2006. 16: p. 393-394.

- Rypdal, M. and K. Rypdal, Modelling temporal fluctuations in avalanching systems. Physical Review E, 2008. 78, 051127.

Presentations and outreach

Rypdal, K., M. Rypdal, and H.-B. Fredriksen, Spatiotemporal correlations in Earth’s temperature field from fractional stochastic-diffusive energy balance models, in EGU General Assembly 2015. 2015: Wien.

Nilsen, T., K. Rypdal, H.-B. Fredriksen, M. Rypdal, and O. Løvsletten, Is there a break in scaling on centennial time scale in Holocene temperature records, in EGU General Assembly. 2015: Wien.

Løvsletten, O., M. Rypdal, K. Rypdal, and H.-B. Fredriksen, Statistics of regional surface temperatures post year 1900. Long-range versus short-range dependence, and significance of warming trends, in European Geosciences Union General Assembly 2015. 2015.

Fredriksen, H.-B., K. Rypdal, and M. Rypdal, Spatiotemporal correlation structure of the Earth's surface temperature, in EGU General Assembly 2015. 2015.

Fredriksen, H.-B., O. Løvsletten, M. Rypdal, and K. Rypdal, The statistical differences between the gridded temperature datasets, and their implications for stochastic modelling, in Resclim All Staff Meeting 2015. 2015.

Rypdal, K., L. Østvand, and M. Rypdal, Statistical significance of surface temperature trends in the past 160 years, in ResClim All Staff Meeting 2014. 2014: Oscarsborg.

Rypdal, K., M. Rypdal, T. Nilsen, and H.-B. Fredriksen, The Nature of the Macroweather-Climate Scaling Break in the Holocene, in AGU Fall meeting 2014. 2014: San Francisco, USA.

Rypdal, K. and M. Rypdal, A Delayed Response, in International Innovation. 2014, ResearchMedia ltd. p. 122-124.

Løvsletten, O., M. Rypdal, K. Rypdal, and H.-B. Fredriksen, Significance-testing of trends: Long-range dependence and model selection, in Physical origins of correlated extreme events. 2014.

Løvsletten, O. and M. Rypdal, From Bachelier’s Brownian motion to Mandelbrot’s multifractal model of asset returns and beyond, in Physical Origins of Correlated Extreme Events. 2014.

Fredriksen, H.-B., K. Rypdal, and M. Rypdal, Why does global surface temperature exhibit more persistent temporal scaling than local temperatures?, in European geosciences union general assembly 2014. 2014: Wien.

Fredriksen, H.-B., O. Løvsletten, M. Rypdal, and K. Rypdal, The statistical differences between the gridded temperature datasets, and their implications for stochastic modelling, in American geophysical union fall meeting 2014. 2014: San Francisco.

Østvand, L., K. Rypdal, and M. Rypdal, The performance of wavelet-variance analysis as a method for estimating long-range memory in climatic temperature record, in European Geosciences Union General Assembly. 2013.

Østvand, L., T. Nilsen, K. Rypdal, and M. Rypdal, Long range memory and trends in model data, in AGU Fall Meeting. 2013: San Francisco.

Rypdal, M. and K. Rypdal, Is equilibrium climate sensitivity the best predictor for future global warming?, in AGU Fall meeting 2013. 2013: San Francisco.

Rypdal, K. and M. Rypdal, “Predicting” northern hemisphere temperature for the previous millennium based on a parametric stochastic-dynamic model trained on the instrumental global temperature and forcing records, in AGU Fall meeting 2013. 2013: San Francisco.

Rypdal, K. and M. Rypdal, Estimation of specific climate responses from reconstructions of climate forcing and global temperature, in EGU General Assembly 2013. 2013: Wien.

Fredriksen, H.-B., K. Rypdal, M. Rypdal, and O. Løvsletten, Spatial scale dependence of long-range memory properties of Earth surface temperature, in American Geophysical Union Fall Meeting 2013. 2013: San Francisco.

Fredriksen, H.-B., K. Rypdal, and M. Rypdal, Long-range memory in Earth surface temperature: spatial scale dependence and land-sea differences, in European Geosciences Union General assembly 2013. 2013: Wien.

Østvand, L., O. Løvsletten, M. Rypdal, and K. Rypdal, Maximum Likelihood Estimates of trend- and memory-coefficients in climatic time series, in NordForsk/TOSCA Workshop on Complexity and Climates. 2012.

Østvand, L., O. Løvsletten, M. Rypdal, and K. Rypdal, Maximum Likelihood Estimates of trend- and memory-coefficients in climatic time series, in European Geosciences Union General Assembly 2012. 2012: Wien.

Rypdal, M., K. Rypdal, M.w. Rypdal, K. Rypdal, L. Østvand, and O. Løvsletten, Long-range persistence in the global mean surface temperature and the global warming "time bomb", in EGU General Assembly 2012 (Geophysical Research

Rypdal, K. and M. Rypdal, A strategy for estimation of specific climate sensitivities from SSI reconstructions and paleoclimatic records, in European Space Weather Week. 2012: Brussel.

Løvsletten, O. and M. Rypdal, Multifractal inference, in Aggregation, Inference and Rare Events in the Natural and Socio-economic Sciences. 2012.

Østvand, L., K. Rypdal, and M. Rypdal, Universal Hurst exponent of local and global Earth temperature records?, in European Geosciences Union General Assembly 2011. 2011: Wien.

Rypdal, K. and M. Rypdal, Stochastic properties of solar activity proxies on time scales shorter than the sunspot period, in International astrphysics forum 2011. 2011: Alpbach.

Rypdal, K. and M. Rypdal, Memory in stochastic component and multi-decadal trends of solar activity, in European Geoscience Union General Assembly. 2011: Wien.

Rypdal, K. and M. Rypdal, Detection of climatic regime shifts from time-series data, in Arctic Frontiers. 2011: University of Tromsø.

Løvsletten, O. and M. Rypdal, Multifractal modelling in finance, in The 16th Norwegian Statistical Meeting. 2011.

Rypdal, M. and K. Rypdal, Discerning the structure of small-scale intermittency in plasma turbulence by a method of conﬁned multifractal motions, in Joint EU-UA TTF Workshop. 2010.

Rypdal, K. and M. Rypdal, Trends from Levy-walk statistics in solar activity – a link to multidecadal and secular trends in Earth climate?, in AGU Fall Meeting 2010. 2010: San Francisco.

Rypdal, K. and M. Rypdal, Er det en kompleksitetskobling mellom solaktiviteteten og jordens klima?, in Birkeland-seminaret. 2010: Institutt for fysikk og teknologi, Universitetet i Tromsø.

Løvsletten, O. and M. Rypdal, Multifractal modelling of short-term interest rates, in The Birkeland Seminar. 2010.

Rypdal, K., M.w. Rypdal, K. Rypdal, M. Rypdal, and T. Zivkovic, Multifractal analysis of experimental time series - does it disclose or obscure the physics?

Stochastic modeling of fluctuations in the solar wind - magnetospheric interaction, in Workshop on "Nonlinear dynamics and structure formation in complex systems: challenges and open problems for modern physics". 2009: ENEA-Frascati, Rome, Italy

Chania, Crete.

Rypdal, K. and M. Rypdal, Complex system approaches to space and laboratory plasmas, in Interrelationship between plasma experiments in laboratory and space (IPELS-2009). 2009: Stockholm.

Rypdal, K., M. Rypdal, and B.V. Kozelov, Bursty transport - can we distinguish turbulence from SOC-avalanching?, in 13'th EU-US Transport Task Force Workshop. 2008: København.

Rypdal, K. and M. Rypdal, Rasende Dynamikk. 2008.

Rypdal, K. and M. Rypdal, En Felles Arena. 2008.

Rypdal, K., B.V. Kozelov, M. Rypdal, and T. Zivkovic, Stochastic modeling of fluctuations in large-scale properties of the solar wind or the magnetosphere-ionosphere system, in American Geophysical Union Fall Meeting. 2008: San Francisco.

Rypdal, M. and K. Rypdal, A stochastic theory for temporal fluctuations in self-organized critical systems, in American Geophysical Union Fall meeting 2007. 2007: San francisco, California, USA.

Rypdal, M., A stochastic theory for temporal toppling fluctuations in self-organized critical systems, in Det Norske Fysikermøtet 2007. 2007: Tromsø.

Rypdal, M., A primer on sandpiles, in Complexity in plasma and geospace systems. 2007: Geilo.

Rypdal, K., T. Zivkovic, B.V. Kozelov, and M. Rypdal, Astro and geospace complexity: the SOC versus turbulence controversy, in 6th IGPP Annual International Astrophysics Conference. 2007: Honolulu.

Rypdal, K. and M. Rypdal, A stochastic theory for temporal toppling fluctuations in self-organized critical systems, in Natural Complexity: data and theory in dialogue. 2007: Cambridge UK.

Rypdal, K., B.V. Kozelov, and M. Rypdal, Do sandpile models explain complex dynamics in solar flares and polar aurora?, in American Geophysical Union Fall meeting 2007. 2007: San Francisco, California, USA.

Rypdal, K. and M. Rypdal, Hva bestemmer nivået?, in Friidrett. 2006, Sportsmedia AS. p. 4.