scholarly journals Stepping into the Equatorward Boundary of the Auroral Oval: preliminary results of multi scale statistical analysis

2019 ◽  
Vol 61 (Vol 61 (2018)) ◽  
Author(s):  
Massimo Materassi ◽  
Mirko Piersanti ◽  
Giuseppe Consolini ◽  
Piero Diego ◽  
Giulia D'Angelo ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Auroral Oval ◽  
Preliminary Results ◽  
Multi Scale ◽  
Equatorward Boundary

Parallel computing of multi-scale continental deformation in the Western United States: Preliminary results

2007 ◽  
Vol 163 (1-4) ◽  
pp. 35-51 ◽  
Author(s):  
Mian Liu ◽  
Youqing Yang ◽  
Qingsong Li ◽  
Huai Zhang
Keyword(s):  
United States ◽  
Parallel Computing ◽  
Western United States ◽  
Preliminary Results ◽  
Multi Scale ◽  
Continental Deformation

scholarly journals Correspondence between the ULF wave power spatial distribution and auroral oval boundaries

2016 ◽  
Vol 2 (2) ◽  
pp. 46-65 ◽  
Author(s):  
Ольга Козырева ◽  
Olga Kozyreva ◽  
Вячеслав Пилипенко ◽  
Vyacheslav Pilipenko ◽  
Марк Энгебретсон ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Spectral Power ◽  
Recovery Phase ◽  
Temporal Variations ◽  
Auroral Oval ◽  
Wave Power ◽  
Observational Result ◽  
Equatorward Boundary ◽  
Image Satellite ◽  
Magnetospheric Field

The world-wide spatial distribution of the wave power in the Pc5 band during magnetic storms has been compared with auroral oval boundaries. The poleward and equatorward auroral oval boundaries are estimated using either the British Antarctic Survey database containing IMAGE satellite UV observations of the aurora or the OVATION model based on the DMSP particle data. The “epicenter” of the spectral power of broadband Pc5 fluctuations during the storm growth phase is mapped inside the auroral oval. During the storm recovery phase, the spectral power of narrowband Pc5 waves, both in the dawn and dusk sectors, is mapped inside the auroral oval or around its equatorward boundary. This observational result confirms previously reported effects: the spatial/temporal variations of the Pc5 wave power in the morning/pre-noon sector are closely related to the dynamics of the auroral electrojet and magnetospheric field-aligned currents. At the same time, narrowband Pc5 waves demonstrate typical resonant features in the amplitude-phase latitudinal structure. Thus, the location of the auroral oval or its equatorward boundary is the preferred latitude for magnetospheric field-line Alfven resonator excitation. This effect is not taken into account by modern theories of ULF Pc5 waves, but it could be significant for the development of more adequate models.

Quantifying uncertainties in multi-scale studies of fractured reservoir analogues: Implemented statistical analysis of scan line data from carbonate rocks

2010 ◽  
Vol 32 (9) ◽  
pp. 1271-1278 ◽  
Author(s):  
Vincenzo Guerriero ◽  
Alessandro Iannace ◽  
Stefano Mazzoli ◽  
Mariano Parente ◽  
Stefano Vitale ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Carbonate Rocks ◽  
Fractured Reservoir ◽  
Multi Scale ◽  
Scan Line

scholarly journals Dayside cosmic noise absorption at the equatorward boundary of auroral oval as observed from Maitri, Antarctica ( L  = 5; CGM 62.45°S, 55.45°E)

2016 ◽  
Vol 121 (4) ◽  
pp. 3198-3211 ◽  
Author(s):  
Jayanta K. Behera ◽  
Ashwini K. Sinha ◽  
Geeta Vichare ◽  
Olga Kozyreva ◽  
Rahul Rawat ◽  
...  
Keyword(s):  
Auroral Oval ◽  
Noise Absorption ◽  
Equatorward Boundary ◽  
Cosmic Noise

scholarly journals AN ANALYSIS OF CROSS-SHORE PROFILE EVOLUTION OF A SAND AND A COMPOSITE SAND-GRAVEL BEACHES

2012 ◽  
Vol 1 (33) ◽  
pp. 18
Author(s):  
Harshinie Karunarathna ◽  
Jose Horrillo-Caraballo ◽  
Roshanka Ranasinghe ◽  
Andrew Short ◽  
Dominic Reeve
Keyword(s):  
Statistical Analysis ◽  
Beach Erosion ◽  
Eof Analysis ◽  
Equilibrium Concept ◽  
Event Scale ◽  
Multi Scale ◽  
Differential Behavior ◽  
Equilibrium Profile ◽  
Annual Scale ◽  
Morphodynamic Evolution

In this paper, cross-shore morphodynamic evolution of a sand and sand-gravel composite beach, are compared and contrasted used historic surveys of beach profiles. The differential behavior of cross-shore morphodynamics at a range of time scales covering event-scale dynamics up to intra-annual scale variability are investigated and discussed. The application of equilibrium concept to both beach types is explored through Dean’s equilibrium profile and Vellinga’s beach erosion profile. Variability of cross-shore profile dynamics are quantified and discussed through bulk statistical analysis. Multi-scale morphodynamic trends are determined using Empirical Orthogonal Eigenfunction (EOF) analysis. The above analysis enables to recognise failure mechanism of each beach type during a storm.

scholarly journals A Tropical Cyclone Initialization in Multi-Scale Localization with Hybrid Four Dimensional Ensemble-Variational System: Preliminary Results

SOLA ◽  
2020 ◽  
Vol 16 (0) ◽  
pp. 145-150
Author(s):  
Sujeong Lim ◽  
Hyo-Jong Song ◽  
In-Hyuk Kwon
Keyword(s):  
Tropical Cyclone ◽  
Variational System ◽  
Preliminary Results ◽  
Multi Scale ◽  
Tropical Cyclone Initialization

MULTI-SCALE STATISTICAL ANALYSIS OF BEACH PROFILES ON THE SUFFOLK COAST, UK

2015 ◽  
Author(s):  
JOSE M. HORRILLO-CARABALLO ◽  
DOMINIC E. REEVE ◽  
HARSHINIE KARUNARATHNA ◽  
SHUNQI PAN ◽  
HELENE BURNINGHAM
Keyword(s):  
Statistical Analysis ◽  
Multi Scale

scholarly journals Deconvolving the Nucleus of Centaurus A Using Chandra PSF Library

2001 ◽  
Vol 205 ◽  
pp. 66-69
Author(s):  
Margarita Karovska ◽  
T. Aldcroft ◽  
M.S. Elvis ◽  
I.N. Evans ◽  
G. Fabbiano ◽  
...  
Keyword(s):  
Black Hole ◽  
Angular Resolution ◽  
High Angular Resolution ◽  
Central Source ◽  
X Ray ◽  
Preliminary Results ◽  
Multi Scale ◽  
Supermassive Black Hole ◽  
Scale Structures ◽  
Centaurus A

We describe preliminary results from our study of multi-scale structures in Centaurus A (NGC 5128) obtained using the Chandra X-ray Observatory HRC-I observations. The high-angular resolution Chandra images reveal X-ray multi-scale structures in this object with unprecedented detail and clarity. The region surrounding the Cen A nucleus, believed to be associated with a supermassive black hole, shows structures on arcsecond scales clearly resolved from the central source.

The Dynamics of the Equatorward Boundary of the Auroral Oval

1986 ◽  
pp. 633-641 ◽  
Author(s):  
H. Nakai ◽  
Y. Kamide ◽  
D. A. Hardy ◽  
M. S. Gussenhoven
Keyword(s):  
Auroral Oval ◽  
Equatorward Boundary
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