scholarly journals Space–Time Structure of Diabatic Heating in Monsoon Intraseasonal Oscillation

2015 ◽  
Vol 28 (6) ◽  
pp. 2234-2255 ◽  
Author(s):  
Abheera Hazra ◽  
V. Krishnamurthy
Keyword(s):  
Phase Difference ◽  
Vertical Structure ◽  
Diabatic Heating ◽  
Three Dimensional ◽  
Intraseasonal Oscillation ◽  
Space Time ◽  
Time Structure ◽  
Monsoon Region ◽  
Horizontal Structure ◽  
Space Time Structure

Abstract The space–time structure of the leading monsoon intraseasonal oscillation (MISO) in three-dimensional diabatic heating is studied. Using the ERA-Interim data of the European Centre for Medium-Range Weather Forecasts, the diabatic heating data were constructed by the residual method of the thermodynamic equation. The MISO was extracted by applying multichannel singular spectrum analysis on the daily anomalies of three-dimensional diabatic heating over the South Asian monsoon region for the period 1979–2011.The diabatic heating MISO has a period of 45 days, and exhibits eastward propagation in the equatorial Indian and Pacific Oceans and northward propagation over the entire monsoon region. The horizontal structure shows a long tilted band of heating anomalies propagating northeastward. The period, horizontal pattern, and propagation properties of the diabatic heating MISO are similar to those found in precipitation, outgoing longwave radiation, and circulation in earlier studies. The vertical structure of the diabatic heating MISO indicates deep columns, with maximum values at about 450 hPa, propagating northeastward. The vertical structure of the heating anomalies has good correspondence with that of the moisture anomalies but with a phase difference. The moisture anomalies lead the heating anomalies and may provide a preconditioning process for the propagation mechanism. The temperature anomalies also show oscillatory behavior corresponding to the diabatic heating MISO but the phase difference between the two varies from region to region.

scholarly journals Four-dimensional energy spectrum for space–time structure of plasma turbulence

2014 ◽  
Vol 21 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Y. Narita
Keyword(s):  
Energy Spectrum ◽  
Wave Vector ◽  
Magnetic Energy ◽  
Three Dimensional ◽  
Plasma Turbulence ◽  
Space Time ◽  
Time Structure ◽  
Spectral Parameters ◽  
Space Time Structure ◽  
Dimensional Wave

Abstract. A parametric model of the inertial-range energy spectrum is constructed for plasma turbulence in the four-dimensional wave vector and frequency domain. The model is based on that of the Eulerian wavenumber-frequency spectrum developed for describing fluid turbulence, and includes wave vector anisotropies in the three-dimensional wave vector domain by approximating the spectrum to a set of ellipses. The shape of the four-dimensional spectrum is determined by the Doppler shift, the Doppler broadening, and anisotropy coefficients. The model is applied to the magnetic energy spectrum in the near-Earth solar wind measured by four Cluster spacecraft, and the set of the spectral parameters are determined observationally. In this way, space–time structure of plasma turbulence can be condensed into a small number of parameters, which is suitable for evaluating the energy spectra in observational and numerical studies on the quantitative basis.

Space-time structure of auroral radio absorption events observed with the imaging riometer at south pole

Radio Science ◽  
1991 ◽  
Vol 26 (4) ◽  
pp. 925-930 ◽  
Author(s):  
J. K. Hargreaves ◽  
D. L. Detrick ◽  
T. J. Rosenberg
Keyword(s):  
Space Time ◽  
Time Structure ◽  
South Pole ◽  
Space Time Structure

scholarly journals SPACE–TIME STRUCTURE AND SPINOR GEOMETRY

2008 ◽  
Vol 50 (2) ◽  
pp. 143-176 ◽  
Author(s):  
GEORGE SZEKERES ◽  
LINDSAY PETERS
Keyword(s):  
Cosmological Solution ◽  
Space Time ◽  
Time Structure ◽  
Variation Principle ◽  
Field Equations ◽  
Covering Group ◽  
Space Time Structure ◽  
Spinor Geometry ◽  
Complete Set ◽  
Particle Solution

AbstractThe structure of space–time is examined by extending the standard Lorentz connection group to its complex covering group, operating on a 16-dimensional “spinor” frame. A Hamiltonian variation principle is used to derive the field equations for the spinor connection. The result is a complete set of field equations which allow the sources of the gravitational and electromagnetic fields, and the intrinsic spin of a particle, to appear as a manifestation of the space–time structure. A cosmological solution and a simple particle solution are examined. Further extensions to the connection group are proposed.

Space‐time structure as a property derived from the operation of consciousness at the quantum-classical boundary

2021 ◽  
Vol 34 (1) ◽  
pp. 6-11
Author(s):  
Liang Shan
Keyword(s):  
Measurement Problem ◽  
Special Kind ◽  
Physical World ◽  
Space Time ◽  
Space Structure ◽  
Time Structure ◽  
Space Time Structure ◽  
Classical Boundary ◽  
Microscopic World ◽  
Near Death Experiences

The space‐time is empirically perceived as a pre-existing property of the universe. However, a special kind of perception that takes place in near-death-experiences (NDEs) is challenging this idea. Here, I will illustrate how understanding of this particular state of consciousness (named the bodiless consciousness) helps us re-think the space‐time structure of the physical world. I first speculate that the bodiless consciousness perceives the physical world as nonlocal 4D. I then propose that the space‐time is a “derived” feature subsequent to the emergence of perception of the bodiless consciousness, rather than a pre-existing and unchangeable property. Next, I explain that the space structure only takes place in the classical (or macroscopic) world rather than in the quantum (or microscopic) world, due to its intrinsic imperceptibility to the bodiless consciousness. Without a presupposed structure of the space, the strangeness of the quantum world is expected. Then, I bring up the old measurement problem. I will argue that it is the bodiless consciousness that may entangle with the superposed state of an observed system and trigger the collapse. Finally, I will briefly discuss the potential relationship between electromagnetic wave and consciousness.

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