The Role of Site Geometry in Metric Wave Radiation Testing

1986 ◽  
Author(s):  
Tomas J. Dvorak
Keyword(s):  
Wave Radiation ◽  
Radiation Testing

Quantifying the Role of Ultrasonic Wave Radiation on Kinetics of Asphaltene Aggregation in a Toluene–Pentane Mixture

2011 ◽  
Vol 29 (9) ◽  
pp. 966-974 ◽  
Author(s):  
I. Najafi ◽  
S. M.R. Mousavi ◽  
M. H. Ghazanfari ◽  
C. Ghotbi ◽  
A. Ramazani ◽  
...  
Keyword(s):  
Ultrasonic Wave ◽  
Wave Radiation ◽  
Kinetics Of

scholarly journals Influence of the atmospheric heat and moisture transport on summer warming in the Аrctic

2017 ◽  
pp. 67-77
Author(s):  
G. V. Alekseev ◽  
S. I. Kuzmina ◽  
L. P. Bobilev ◽  
A. V. Urazgildeeva ◽  
N. V. Gnatuk
Keyword(s):  
Moisture Transport ◽  
Atmospheric Transport ◽  
The Arctic ◽  
Wave Radiation ◽  
Annual Data ◽  
Summer Warming ◽  
Heat And Moisture Transport ◽  
Atmospheric Heat ◽  
Heat And Moisture

There are different points of view on the role of the atmospheric heat and moisture transport in increasing summer warming in the Arctic, which are often based on the analysis of average annual data. In this paper, the analysis of summer atmospheric transport, their influence on air temperature and water vapor content in the atmosphere, trends in multi-year transport changes are fulfilled. It is noted the important role of moisture inflows from the Arctic Ocean in the summer season and their influence on the growth of long-wave radiation and amplification of sea ice shrinking.

scholarly journals Simulating the connections of ENSO and the rainfall regime of East Africa and the upper Blue Nile region using a climate model of the Tropics

2014 ◽  
Vol 18 (11) ◽  
pp. 4311-4323 ◽  
Author(s):  
M. A. H. Zaroug ◽  
F. Giorgi ◽  
E. Coppola ◽  
G. M. Abdo ◽  
E. A. B. Eltahir
Keyword(s):  
Climate Model ◽  
Regional Climate ◽  
Summer Rainfall ◽  
Wave Radiation ◽  
Rainfall Regime ◽  
Outgoing Long Wave Radiation ◽  
Blue Nile ◽  
Rainfall Anomalies ◽  
The Tropics

Abstract. We simulate the observed statistical relationship between ENSO and the rainfall regime of the upper Blue Nile using the tropical-band version of the regional climate model RegCM4 (or Reg-TB). An ensemble of nine simulations for the 28-year period 1982–2009 is completed to investigate the role of ENSO in modulating rainfall over the upper Blue Nile catchment. Reg-TB shows a good skill in simulating the climatology of temperature, outgoing long-wave radiation patterns as well as related atmospheric circulation features during the summer season (i.e. the rainy season over the Blue Nile catchment). The model also succeeds in reproducing the observed negative correlation between Pacific SST and rainfall anomalies over the Blue Nile catchment, and in particular the association of droughts over the Blue Nile with El Niño events that start in April–June. We thus propose that observations and model forecasts of Pacific SST during this season could be used in seasonal forecasting of summer rainfall over the upper Blue Nile region.

scholarly journals Long-wave radiation balances of grassy surface and bare soil in Wrocław

2019 ◽  
Vol 116 ◽  
pp. 00012 ◽  
Author(s):  
Krystyna Bryś ◽  
Tadeusz Bryś ◽  
Hanna Ojrzyńska
Keyword(s):  
Bare Soil ◽  
Wave Radiation ◽  
Final Conclusion ◽  
Long Wave ◽  
Big City ◽  
Empirical Argument ◽  
Sw Poland ◽  
Main Components ◽  
Long Wave Radiation

The paper goal is to show diurnal, seasonal and year to year variability of long-wave radiation balances of two contrasting types of active surfaces – grassy and bare soil in the context of bioclimatic and ecological role of plant areas in a big city. The analyses was conducted on example of Wrocław (SW Poland) and the experimental results were obtained from about twelve-year period of measurements. The average annual values of fluxes of the main components of these long-wave balances reached: 368.6 W/m2 for the long-wave radiation of bare soil, 363.6 W/m2 for the long-wave radiation of grassy surface and 322.9 W/m2 for the downward atmospheric radiation. These differences between values of bare soil and grassy surfaces varied during the year from negative values in winter to positive values in spring and the summer. The final conclusion of the study is an important empirical argument for urban planning to extend share of plant areas in cities and urban agglomerations.

scholarly journals A preliminary study about gravitational wave radiation and cosmic heat death

2021 ◽  
Vol 502 (2) ◽  
pp. 2787-2792
Author(s):  
Jianming Zhang ◽  
Qiyue Qian ◽  
Yiqing Guo ◽  
Xin Wang ◽  
Xiao-Dong Li
Keyword(s):  
Dark Matter ◽  
Time Scale ◽  
Mechanical Energy ◽  
Wave Radiation ◽  
Future Evolution ◽  
Black Hole Accretion ◽  
Mechanical Energy Dissipation ◽  
Heat Death ◽  
The Universe

ABSTRACT We study the role of gravitational waves (GW) in the heat death of the Universe. Due to the GW emission, in a very long period, dynamical systems in the universe suffer from persistent mechanical energy dissipation, evolving to a state of universal rest and death. With N-body simulations, we adopt a simple yet representative scheme to calculate the energy loss due to the GW emission. For current dark matter systems with mass ∼1012−1015 M⊙, we estimate their GW emission time-scale as ∼1019−1025 yr. This time-scale is significantly larger than any baryon processes in the Universe, but still ∼1080 times shorter than that of the Hawking radiation. We stress that our analysis could be invalid due to many unknowns such as the dynamical chaos, the quadrupole momentum of haloes, the angular momentum loss, the dynamic friction, the central black hole accretion, the dark matter decays or annihilations, the property of dark energy, and the future evolution of the Universe.

scholarly journals Simulating the connections of ENSO and the hydrology of the Blue Nile using a climate model of the tropics

2014 ◽  
Vol 11 (2) ◽  
pp. 2233-2262 ◽  
Author(s):  
M. A. H. Zaroug ◽  
F. Giorgi ◽  
E. Coppale ◽  
E. A. B. Eltahir
Keyword(s):  
Climate Model ◽  
Regional Climate ◽  
Summer Season ◽  
Wave Radiation ◽  
Outgoing Long Wave Radiation ◽  
Blue Nile ◽  
Long Wave ◽  
Rainfall Anomalies ◽  
The Tropics

Abstract. We simulate the observed statistical relationship between ENSO and the hydrology of the Blue Nile using the tropical-band version of the regional climate model RegCM4 (or Reg-TB) for the 28 yr period 1982–2009. An ensemble of 9 simulations is completed to investigate the role of ENSO in the hydrology of the Blue Nile catchment. Re-TB shows a good skill in simulating the climatology of temperature, outgoing long-wave radiation patterns as well as related atmospheric circulation features during the summer season (i.e. the rainy season over the Blue Nile catchment). The model also succeeds in reproducing the observed negative correlation between Pacific SST and rainfall anomalies over the Blue Nile catchment, and in particular the association of droughts over the Blue Nile with El Niño events that start during the April–June period. We thus propose that observations as well as model forecasts of Pacific SST during this season should be used in seasonal forecasting of the Blue Nile flow.

scholarly journals Millisecond Polarized Pulses in Decametre-Wave Radiation from Jupiter and Sun

1974 ◽  
Vol 65 ◽  
pp. 407-413
Author(s):  
C. H. Barrow
Keyword(s):  
Propositional Calculus ◽  
Wave Radiation ◽  
Common Mechanism ◽  
The Sun ◽  
University Of Florida ◽  
Physical Conditions ◽  
Actual Mechanism ◽  
Pulse Characteristics ◽  
The University

A new approach is suggested to the problem of the theory of Jovian decametric radiation and physical conditions at the point of origin. This depends upon a comparison of the characteristics of fast pulse decametre-wave radio emission from both Jupiter and the Sun and invokes the deductive procedure which Sagan (1971) has called ‘Propositional Calculus’.Fast polarized pulses in radiation from Jupiter and the Sun have been studied at fixed frequencies in the range 18 to 26 MHz with time resolutions from one to five msec; a number of similarities between the pulses from both sources have been noted. A comparison of some of the pulse characteristics is being made in order to decide whether or not they are sufficiently alike to be regarded as having a common mechanism of origin at both Jupiter and the Sun. From this ‘decision’ it is proposed to establish boundary conditions for theoretical study. Fast pulses in the Jupiter radiation are generally supposed to be a source phenomenon although their actual mechanism is not understood. The reasons for this are to some extent inferred rather than proven and so, to check the possible (if unlikely) role of the interplanetary medium, observations are also being made using the large 26 MHz array at the University of Florida to search for possible fast pulses in the radiation from the more distant source Taurus A.

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