Browsing Mathematics by Title
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Was the Little Ice Age more or less El Niñolike than the Medieval Climate Anomaly? Evidence from hydrological and temperature proxy data
(European Geosciences Union (EGU) / Copernicus Publications, 20170329)The El Niño–Southern Oscillation (ENSO) is the most important source of global climate variability on interannual timescales and has substantial environmental and socioeconomic consequences. However, it is unclear how it ... 
Wave dispersion properties of compound finite elements
(Elsevier for Academic Press, 20170228)Mixed finite elements use different approximation spaces for different dependent variables. Certain classes of mixed finite elements, called compatible finite elements, have been shown to exhibit a number of desirable ... 
Wavelet transformbased denoising for twophoton imaging of synaptic Ca2+ transients.
(Biophysical Society, 20130305)Postsynaptic Ca(2+) transients triggered by neurotransmission at excitatory synapses are a key signaling step for the induction of synaptic plasticity and are typically recorded in tissue slices using twophoton fluorescence ... 
Weak chimeras in minimal networks of coupled phase oscillators
(American Institute of Physics (AIP), 2015)We suggest a definition for a type of chimera state that appears in networks of indistinguishable phase oscillators. Defining a "weak chimera" as a type of invariant set showing partial frequency synchronization, we show ... 
Weak convergence to extremal processes and record events for nonuniformly hyperbolic dynamical systems
(Cambridge University Press (CUP), 20170907)For a measurepreserving dynamical system (X , f, µ), we consider the time series of maxima Mn = max{X1, . . . , Xn} associated to the process Xn = φ( f n−1 (x)) generated by the dynamical system for some observable φ ... 
Weakened tropical circulation and reduced precipitation in response to geoengineering
(Institute of Physics, 2014)Geoengineering by injection of reflective aerosols into the stratosphere has been proposed as a way to counteract the warming effect of greenhouse gases by reducing the intensity of solar radiation reaching the surface. ... 
A weibull approach for improving climate model projections of tropical cyclone windspeed distributions
(American Meteorological Society, 20140101)Reliable estimates of future changes in extreme weather phenomena, such as tropical cyclone maximum wind speeds, are critical for climate change impact assessments and the development of appropriate adaptation strategies. ... 
What is the spatial distribution of magnetic helicity injected in a solar active region?
(EDP Sciences, 2006)Context. Magnetic helicity is suspected to play a key role in solar phenomena such as flares and coronal mass ejections. Several investigations have recently computed the photospheric flux of magnetic helicity in active ... 
White paper: Uncertainty and variability in computational and mathematical models of cardiac physiology.
(Wiley, 20160315)The Cardiac Physiome effort is one of the most mature and successful applications of mathematical and computational models for describing and advancing the understanding of physiology. After five decades of development, ... 
Why RLC realizations of certain impedances need many more energy storage elements than expected
(Institute of Electrical and Electronics Engineers (IEEE), 20170209)It is a significant and longstanding puzzle that the resistor, inductor, capacitor (RLC) networks obtained by the established RLC realization procedures appear highly nonminimal from the perspective of linear systems ... 
Windinduced odd gravitational harmonics of Jupiter
(Oxford University Press for Royal Astronomical Society, 2015)While the rotational distortion of Jupiter makes a major contribution to its lowermost order even zonal gravitational coefficients Jn with n ≥ 2, the component of the zonal winds with equatorial antisymmetry, if sufficiently ... 
WithinBurst Synchrony Changes for Coupled Elliptic Bursters
(Society for Industrial and Applied Mathematics, 2010)We study a novel phenomenon for coupled identical bursters: synchronized bursts where there are changes of spike synchrony within each burst. The examples we study are for normal form elliptic bursters where there is a ... 
Writhe in the StretchTwistFold Dynamo
(Taylor & Francis, 2009)This article looks at the influence of writhe in the stretchtwistfold dynamo. We consider a thin flux tube distorted by simple stretch, twist, and fold motions and calculate the helicity and energy spectra. The writhe ... 
The writhe of helical structures in the solar corona
(EDP Sciences, 2010)Context. Helicity is a fundamental property of magnetic fields, conserved in ideal MHD. In flux rope geometry, it consists of twist and writhe helicity. Despite the common occurrence of helical structures in the solar ... 
Xray quasiperiodic pulsations in solar flares as magnetohydrodynamic oscillations
(EDP Sciences, 2005)We report the first observation at high spatial resolution of longperiod quasiperiodic pulsations (QPP) of Xray radiation during solar flares, made possible with the Reuven Ramaty High Energy Solar Spectroscopic Imager ... 
The XWS open access catalogue of extreme European windstorms from 1979 to 2012
(European Geosciences Union (EGU), 20140922)The XWS (eXtreme WindStorms) catalogue consists of storm tracks and modelgenerated maximum 3 s windgust footprints for 50 of the most extreme winter windstorms to hit Europe in the period 19792012. The catalogue is ...