Real Atmosphere Research Articles

Interface-engineered metallic 1T-MoS2 nanosheet array induced via palladium doping enabling catalysis enhancement for lithium–oxygen battery

Lacking strategy to enhance the intrinsic catalytic activity and site density of hexagonal molybdenum disulfide (2H-MoS2) is restricting their further development as viable electrocatalysts for lithium–oxygen (Li–O2) battery. Here, palladium (Pd) induced metallic (1T) MoS2 nanosheet array supported on carbon textiles (Pd-TMS/CT) was deliberately fabricated as a high-efficient freestanding cathode of Li–O2 battery. Transforming semiconducting 2H phase to the stabilized metallic 1T phase of MoS2 was induced by doping Pd using a spontaneous interfacial redox strategy. This novel class of 1T-MoS2 nanosheet array with unique electronic structures enables the electrode with fast reaction kinetics, high electrical transport rate, and proliferated catalytic active sites, which lead to a striking improvement of their intrinsic catalytic behavior in Li–O2 battery. In addition, the synergistic effect with well-designed surface chemistry of MoS2 is favorable for the reversible formation and decomposition of products and the inhibition of side reactions on Pd-TMS/CT cathode. As a result, the battery with Pd-TMS/CT exhibits outstanding electrochemical behavior in terms of high discharge capacity of 7441 mA h g−1, low overpotential, and especially the excellent electrochemical stability for over 2488 h (622 cycles). Moreover, due to its flexibility superiority, the assembled pouch-type battery based on Pd-TMS/CT cathode can stably operate in real air atmosphere under different bending and twisting conditions, which opens up a variety of potential applications of flexible devices with high energy density.

X-ray spectral analysis of the neutron star in SNR 1E 0102.2−7219

ABSTRACT We re-analysed numerous archival Chandra X-ray observations of the bright supernova remnant (SNR) 1E 0102.2−7219 in the Small Magellanic Cloud, to validate the detection of a neutron star (NS) in the SNR by Vogt et al. Careful attention to the background is necessary in this spectral analysis. We find that a blackbody + power-law model is a decent fit, suggestive of a relatively strong B field and synchrotron radiation, as in a normal young pulsar, though the thermal luminosity would be unusually high for young pulsars. Among realistic NS atmosphere models, a carbon atmosphere with B = 1012 G best fits the observed X-ray spectra. Comparing its unusually high thermal luminosity ($L_{\mathrm{ bol}} = 1.1_{-0.5}^{+1.6}\times 10^{34}$ erg s−1) to other NSs, we find that its luminosity can be explained by decay of an initially strong magnetic field (as in magnetars or high B-field pulsars) or by slower cooling after the supernova explosion. The nature of the NS in this SNR (and of others in the Magellanic Clouds) could be nicely confirmed by an X-ray telescope with angular resolution like Chandra, but superior spectral resolution and effective area, such as the Lynx concept.

“Liquidity & Profitability Analysis of the Selected Infrastructure Companies in India”

The business corporation’s are usually established with a read of earning profit kind the business operations. However beneath totally different state of affairs the article of the business corporations is also modified to survival, growth stability etc. it's tough for a business to breathe well while not profit. it should be thought to be a mirror of the operative performance of the business activities. But in the real business atmosphere of nowadays, profit it so, not the sole objective however one of the foremost necessary objectives, which commonly guide and direct business operations. Profit is Associate in tending absolute connotation, whereas gain may be a relative construct, despite being closely associated with a reciprocally interdependent, as they're, profit and gain are two different ideas. In alternative words, in spite of their generic nature, every one of them incorporates a distinct role in business issues. Gain is that the main indicator of the potency and effectiveness of a commerce in achieving its goal of earning profit. Analysis of the gain reveals on however the position of profits stands as a results of total transactions made throughout the year.

Engineering equations for the filamentation collapse distance in lossy, turbulent, nonlinear media.

The propagation of high peak-power laser beams in real atmospheres has been an active research area for a couple of decades. Atmospheric turbulence and loss will induce decreases in the filamentation self-focusing collapse distance as the refractive index structure parameter and volume extinction coefficient, respectively, increase. This paper provides a validated analytical method for predicting the filamentation onset distance in lossy, turbulent, nonlinear media. It is based on a modification of Petrishchev's and Marburger theories. It postulates that the ratio of the peak power to critical power at range in turbulence is modified by a multiplicative, rather than additive, gain factor. Specifically, this new approach modifies the Petrishchev's turbulence equation to create the required multiplicative factor. This is necessary to create the shortened filamentation onset distance that occurs when a laser beam propagates through the cited nonlinear medium. This equation then is used with the Marburger distance and the Karr et al loss equations to yield the filamentation onset distance estimate in lossy, turbulent, nonlinear environment. Theory validation is done against two independent sets of computer simulation results. One comes from the NRL's HELCAP software and the other from MZA's Wave Train modeling software package. This paper also shows that once the zero-turbulence onset distance is set based on link loss, the addition of turbulence creates essentially the same PDFs at similar median distances for each loss case. This result had not been previously reported. This is the first quantitative comparison between closed form equations and computer simulation results characterizing filament generation in a lossy, turbulent, nonlinear medium.

Three-dimensional computational fluid dynamics modelling of sodium oxide aerosol atmospheric dispersion from indoor sodium fire

In order to estimate the atmospheric impact of the release of sodium oxide aerosols from an indoor sodium fire, two chemical models describing the evolution of sodium oxide aerosols have been implemented in the atmospheric version of the computational fluid dynamic model Code_Saturne. The first chemical model is a shrinking core model. It describes the hydration and transformation of sodium oxide particles to carbonate by assuming that particles are made of layers of different compositions (sodium oxide, sodium hydroxide and carbonate). In the second model, a reactive absorption model describes more accurately the carbonate formation from sodium hydroxide. Both model implementations favorably compare to the published results produced by the model authors, as well as to experimental data resulting from experiments in laboratory. They differ in the speed of carbonate formation, and notably in the atmospheric humidity dependence of this formation. The second model may be more adapted to relative humidity larger than 50% where the core of particles is liquid. The atmospheric dispersion of sodium aerosols is modelled with Code_Saturne by assuming a release particle size distribution and by taking into account the sedimentation and deposition processes. The differences between the shrinking core model and the reactive absorption model largely influence the composition of sodium particles during their dispersion in the atmosphere. Further comparisons to experimental measurements of sodium oxide in the real atmosphere are required to evaluate the accuracy of these models at determining atmospheric sodium carbonate concentrations occurring from the transformation of sodium oxides.

Highly sensitive room temperature hydrogen sensor based on undoped SnO2 thin films

The physicochemical property of semiconductors play a vital role in enhancing the gas sensing performance of the metal oxides that can operate in real time atmosphere. Here in, hydrogen (H2) sensing behaviour of SnO2 thin films prepared using DC reactive magnetron sputtering technique by varying the cathode power are reported. From X-ray diffraction (XRD) analysis, polycrystalline nature of SnO2 thin films were observed and it exhibited rutile tetragonal structure and the crystallite size was found to be increased from 17.6 to 38.8 nm. From the morphological study taken from field emission-scanning electron microscopy (FE-SEM), the nano granular like morphology was observed. As a result of increase in cathode power, the optical bandgap reduced from 3.5 to 3.3 eV. The influence of cathode power on the sensitivity, response and recovery time have been studied. This report elucidates the H2 sensing response towards undoped SnO2 thin films of about 4.7 at room temperature towards 100 ppm concentration.

Numerical study of performance of two lightning prediction methods based on: Lightning Potential Index (LPI) and electric POTential difference (POT) over Tehran area

The electric POTential difference (POT) and the Lightning Potential Index (LPI) performance in predicting the lightning activity is investigated and the probable relationship between them is examined. These two indices have a similar dependency on microphysical variables such as ice, graupel mixing ratios, and also updraft characteristics within the cloud. Regardless of this similarity, the LPI directly calculated from WRF model is a more favorable parameter for predicting the lightning events in comparison with the POT, which requires an extra package (ELEC) model. Ten years' available data over the Tehran area were reviewed and four thundercloud cases with distinct characteristics (CAPE, time-frequency, intensity) were selected. In order to acquire the associated physical properties, four simulations have been done using the WRF-ELEC model, which is initialized with ERA-Interim data.The assessment conducted within both quantitative and qualitative themes to verify the potential probability of predicting lightning events. In qualitative evaluation framework, the horizontal distribution of LPI and POT were compared to the locations of lightning occurrence detected by WWLLN (The World Wide Lightning Location Network) data as well as the total lightning data obtained from LIS (Lightning Imaging Sensor) in the innermost simulation domain. This evaluation shows that the horizontal patterns of LPI and POT are well consistent with the locations of lightning occurrence. Moreover, in accordance with acquired values of correlation coefficients, it could be inferred that LPI has a better performance in the Number Of Lightning flashes (NOL) prediction than POT. Statistical review of our simulated data (LPI and POT) is performed to study the variation of LPI and POT which resulted in a good correlation between them and therefore, any information about lightning event using LPI values with less computational cost is preferable in the considered domain. Another comparison was carried out based on the calculated correlation coefficient between the simulated NOL and the NOL recorded by WWLLN that does not show any significant correlation between them for none of the cases. Since WWLLN has no observatory in the studied area, inconsistency of the simulated NOL with real atmosphere is justifiable.

Infrared Radiation in the Energetics of the Atmosphere

A review of the processes in the Earth’s atmosphere that affect its energetics is presented. The energetics balance of the Earth and its atmosphere as a whole is considered, and the results of NASA programs for the monitoring of the global temperature and concentration of carbon dioxide and water in the atmosphere are presented. The spectra of the optically active components of the atmosphere in the infrared region are analyzed on the basis of classical methods of molecular spectroscopy. Spectroscopic data from the HITRAN databank facilitate the analysis and lead to a simple scheme whereby the three main greenhouse components—carbon dioxide, water vapor in the form of free water molecules, and a water droplet—create an infrared radiation flux directed toward the Earth’s surface. This radiation is created by water molecules in the range of 0–580 cm–1, the atmospheric radiation in the range of 580–780 cm–1 is determined by the molecules of water and carbon dioxide. At frequencies above 780 cm–1, the contribution to atmospheric radiation due to water molecules is approximately 5%, and the other is determined by the emission of water microdroplets, which partially form clouds. According to this model, at the present atmospheric composition, 52% of the radiation flux to the Earth’s surface is created by atmospheric water vapor, and 32% is due to microdroplets of water in the atmosphere, which include about 0.4% of atmospheric water and 14% of the radiation flux is determined by carbon dioxide molecules. Doubling the mass of atmospheric carbon dioxide, which will occur in about 120 years at the current rate of growth of atmospheric carbon dioxide, will lead to an increase in the atmospheric radiation flux towards the Earth by 0.7 W/m2, and a 10% increase in the atmospheric concentration of water molecules increases this radiation flux by 0.3 W/m2. Doubling of the mass of atmospheric carbon dioxide in a real atmosphere leads to an increase in the global temperature of 2.0 ± 0.3 K in a real atmosphere, according to NASA data analysis. If the concentration of other components does not change, then the change in global temperature will be 0.4 ± 0.2 K, and the contribution to this change due to industrial emissions of carbon dioxide into the atmosphere is 0.02 K.

Das kyōgen-Stück Rōmusha (Die alten Krieger)

Abstract This paper presents a translation of the kyōgen play Rōmusha based on the text from the Toraakibon of the Ōkura (mid seventeenth century) school. It features the role of a boy acolyte within the homoerotic tradition of Buddhist temples in premodern Japan. Those boys were usually termed chigo. While there is already a considerable amount of research done on the historic circumstances and literary conventions in other genres, their appearance in kyōgen theater may add fruitful insights and also shed some light on their function in the comical arts. In the recent years Rōmusha has been performed again several times and it offers a vivid, realistic and erotic atmosphere which is rare to be seen in classical kyōgen. The paper aims to illustrate the structure of the play. While the focus is on the role of the chigo, comical aspects of the drama, references to nō theatre and different interpretations and performance practices will also be mentioned.

Open and Closed Magnetic Configurations of Twisted Flux Tubes

We construct two classes of magnetohydrostatic (MHS) equilibria for an axisymmetric vertical flux tube spanning from the photosphere to the lower part of the transition region within a realistic stratified solar atmosphere subject to solar gravity. We assume a general quadratic expression of the magnetic flux function for the gas pressure and poloidal current and solve the Grad-Shafranov equation analytically. The solution is a combination of a homogeneous and a particular part where the former is separable by a Coulomb function in $r$ and exponential in $z$, while the particular part is an open configuration that has no $z$ dependence. We also present another open field solution by using a self-similar formulation with two different profile functions and incorporating stratified solar gravity to maintain the magnetohydrostatic equilibria, which is a modification of earlier self-similar models with a twist. We study the admitted parameter space that is consistent with the conditions in the solar atmosphere and derive magnetic and the thermodynamic structures inside the flux tube that are reasonably consistent with the photospheric magnetic bright points (MBPs) for both open and closed field Coulomb function and self-similar models as estimated from observations and simulations. The obtained open and closed field flux tube solutions can be used as the background conditions for the numerical simulations for the study of the wave propagation through the flux tubes. The solutions can also be used to construct realistic magnetic canopies.

Appropriate boundary conditions for computational wind engineering: Still an issue after 25 years

The problems associated with creating a Horizontally Homogeneous Atmospheric Boundary Layer (HHABL) model in Computational Wind Engineering (CWE) are discussed. In order to achieve this it is important that ALL the conservation equations are in equilibrium. Previous papers have often focussed more on the turbulence property conservation equations, whereas the most common mistake is in not balancing the streamwise momentum equation. This paper primarily focuses on the required balance between the shear stress and the pressure gradient in a HHABL and the consequential impact on the turbulence profiles. The complex nature of the balance of forces and accelerations in the real atmosphere is discussed and it is shown that the surface layer can be modelled as a planar flow, partially driven by the pressure gradient and partially by the shear stress. It is also noted that in the surface layer, where diffusion of Turbulence Kinetic Energy (TKE) is relatively weak, the TKE profile is strongly related to the shear stress profile. The errors associated with basing inlet conditions on a subset of the conservation equations is investigated by analysing one set of profiles which are derived from the TKE conservation equation in isolation. The use of experimental data as inlet conditions is discussed, particularly in relation to the higher levels of TKE in the atmosphere compared to that suggested by the standard turbulence model constants.

Influence of gaseous pollutants and their synergistic effects on the aging of reflector materials for concentrating solar thermal technologies

Concentrating solar thermal technologies have experienced an important boost in the last few years. Besides the production of electricity, they are particularly useful for the supply of industrial process heat. The industrial atmospheres affecting these solar plants typically contain gaseous pollutants that are likely to promote corrosion on the components of the solar facility, specifically solar reflectors, thereby compromising their optimal performance and the overall system efficiency. Seven accelerated aging tests were designed to study the effects of three air pollutants (H2S, SO2 and NO2) on the durability of two commercially available reflector types (silvered-glass and aluminum), both in single-gas tests and in multicomponent gas mixtures. Additionally, the same material types were exposed outdoors at five representative polluted sites, including industrial, urban and coastal environments. Reflectance and optical microscope monitoring corroborated which degree of corrosion was developed on a specific type of reflector in the different tests with gaseous pollutants, as well as the synergistic effects of gas combinations. For example, tests with sulfur were harmful for silvered-glass reflectors (up to a total of 16 corrosion spots), whereas aluminum was particularly affected by tests with NO2 (numerous micro spots of around 50 μm size). Moreover, comparisons of the corrosion patterns found in accelerated-aging and outdoor exposures revealed which laboratory test reproduced the different real polluted atmospheres in the most realistic way, which is the main goal of this work. For instance, the degradation found at Site 2 was reproduced by Test NO2+SO2, with an acceleration factor of 27.

Precise size distribution measurement of aerosol particles and fog droplets in the open atmosphere.

A precise measurement for the aerosol particle size distribution and fog droplet size distribution simultaneously in the open atmosphere is proposed. The extinction coefficient and small-angle forward scattering measurement are integrated into the detection for particle size distribution in the open atmosphere, and can achieve the fine detection of the particles in the atmosphere with radius between 0.1 to 30 μm. The key technology including optimal scattering angle in small-angle forward scattering measurement and optimal wavelengths selection are discussed and solved in detail. The fourteen different particle size distributions including aerosol size distributions and fog droplet size distributions are used for the determination of optimal forward scattering angle and wavelengths. The optimal forward scattering angle is calculated to be 1.1°. Seven wavelengths for extinction coefficients and five wavelengths for forward scattering coefficients are chosen for the retrieval of particle size distribution in the measurement. The regularization inversion of optical parameters for the retrieval of particle size distribution is described. The aerosol particle size distributions measured by particle spectrometer and actual fog particle size distributions are used for the method test and the reconstructions of particle size distributions. The inversion results show that the method can achieve the precise measurements of aerosol particle size distribution and fog droplet size distribution. The error influence on the inversion results of distributions is discussed. Based on the sensitivity analysis of inversion results, the feasibility of measurement in the real atmosphere is analyzed and discussed, and the scheme of detection system is provided.

Harmony Vertical Axis Wind Turbine

In this paper we present our innovative wind turbine structure for enhancing efficiency for various applications. The smart wind turbine consists of curvy savonius blades which are connected to the shaft. The blades are designed in a such a way that, if wind strikes on any one part of blade (i.e. left side or right side of the shaft ) the wind turbine rotate effectively on its own axis and in only one direction i.e. clockwise direction. The AC generator is connected to the lower part of the wind turbine which converts mechanical energy to electrical energy. The generated electrical energy is stored in battery by converting AC voltage into DC voltage with the help of Rectifier & gets stabilized by regulated Module. This stored energy which can be further used for home lighting, street lighting, toll gates etc. Hence our prototype module has been developed and analyzed in real atmosphere. This project idea does not required heavy towers, Protects against the breakage of blades, works effectively even if wind changes in directions.

Engineering equation for filamentation self-focusing collapse distance in atmospheric turbulence.

The propagation of high peak-power laser beams in real atmospheres will be affected by both linear and nonlinear effects contained therein. Atmospheric turbulence usually will induce decreases in the filamentation self-focusing collapse distance for refractive index structure parameter increases. This paper provided the first validated analytical equation for predicting the nonlinear self-focusing collapse distance based on a modification of Petrishchev's and Marburger's theories. It shows that the estimate of the peak power to critical power at range in turbulence is modified to be the product of the transmitted peak power to critical power ratio times a multiplicative factor derived from Petrishchev's turbulence equations. This estimate is used in the Marburger distance equation to yield a predicted self-focusing collapse distance. This approach was compared to previous NRL's HELCAP computer simulation results and showed good agreement. The HELCAP simulations capability has shown good agreement between its results and a previously published laboratory-scale experiment. The analytical approach in this paper may provide a guide for further numerical simulations, more formal theoretical developments and field experiments.

Microstructure Evolution of a Co/MnO Catalyst for Fischer‐Tropsch Synthesis Revealed by In Situ XAFS Studies

AbstractCo−Mn catalysts have long been considered as a promising catalyst for Fischer‐Tropsch synthesis (FTS). However, the promotional role of Mn and its interaction with Co remain unclear and controversial. In situ characterization of the structural change of FTS catalysts is a powerful way to reveal the reaction mechanisms. Nevertheless, there are significant difficulties because of the harsh reaction conditions. Here, the microstructure evolution of Co/MnO catalysts during FTS is monitored by in situ X‐ray absorption fine structure (XAFS) spectroscopy under real FTS atmosphere up to 6 bar for the first time. Combined with in situ X‐ray diffraction (XRD), ex situ high‐angle annular dark‐field scanning transmission electron microscopy (HAADF‐STEM) and H2 chemisorption characterizations, we reveal that the metallic Co liberated from Mn1−xCoxO during FTS leads to activity enhancement. The presence of Mn improves the Co dispersion. However, an initial association of Mn with the Co phase hampers the cobalt reducibility. We also find that increasing the reaction pressure enhances the oxygen dissociation on the Mn surface, which leads to an increased number of exposed Co sites and consequent FTS activity improvement.

Representation of Vertical Atmospheric Structures by Radio Occultation Observations in the Upper Troposphere and Lower Stratosphere: Comparison to High-Resolution Radiosonde Profiles

AbstractGlobal positioning system (GPS) radio occultation (RO) is capable of retrieving vertical profiles of atmospheric parameters with high resolution (<100 m), which can be achieved in spherically symmetric atmosphere. Horizontal inhomogeneity of real atmosphere results in representativeness errors of retrieved profiles. In most cases these errors increase with a decrease of vertical scales of atmospheric structures and may not allow one to fully utilize the physical resolution of RO. Also, GPS RO–retrieved profiles are affected by observational noise of different types, which, in turn, affect the representation of small-scale atmospheric structures. This study investigates the effective resolution and optimal smoothing of GPS RO–retrieved temperature profiles using high-pass filtering and cross correlation with collocated high-resolution radiosondes. The effective resolution is a trade-off between representation of real atmospheric structures and suppression of observational noise, which varies for different latitudes (15°S–75°N) and altitudes (10–27 km). Our results indicate that at low latitudes the effective vertical resolution is about 0.2 km near the tropical tropopause layer and about 0.5 km in the lower stratosphere. The best resolution of 0.1 km is at the cold-point tropical tropopause. The effective resolutions at the midlatitudes are slightly worse than at low latitudes, varying from ~0.2 to 0.6 km. At high latitudes, the effective resolutions change notably with altitude from ~0.2 km at 10–15 km to ~1.4 km at 22–27 km. Our results suggest that the atmospheric inhomogeneity plays an important role in the representation of the vertical atmospheric structures by RO measurements.

Creation of Sexually Transmitted Diseases Education Program for Young Adults in Rural Cambodia.

Introduction: Globally, adolescents and young adults aged from 15 to 24 years accounted for 25% of the sexually active population. They also took up almost 50% of all newly acquired sexually transmitted diseases (STDs) worldwide. In developing countries/ regions, there have been more unreported cases due to the limited resources and availability of data. This project aimed to enhance sexual health knowledge and encourage behavioral change in sexual practice in rural Cambodia by educational interventions.Methods: A multi-prong project used the Theory of Planned Behavior (TPB) as framework to guide the implementation, which involved carrying out educational talks, group discussion sessions. The educational health talks described the signs and symptoms of STDs and preventive measures including the Abstinence-Be faithful- Condom (ABC) strategy. Pre- and post-intervention assessments were conducted on 111 villagers aged between 18 and 30 years who lived in Peaksneng Thyme Village, Cambodia. Special materials were prepared that highlighted such information were also given to all participants. This was followed by discussion sessions that aimed to strengthen an appropriate attitude toward STDs. A pilot trial was done to prepare and build a constructive, realistic atmosphere and facilitated in-depth spread of main messages. A 20-item assessment of STD knowledge was used as pre- and post-intervention evaluation tool. Individual participant scores were compared to determine the effectiveness of interventions.Conclusion: This comprehensive program was effective in enhancing sexual knowledge in high-risk groups of both sexes as well as general public in rural Cambodia. With experiences gained, this could be replicated in nearby communities, possibly motivating community behavioral change in future. Alternatively, this approach could be further developed, or using other behavioral theories, and applied to other health issues in this country.

Previsão do campo de vento empregando o modelo WRF para a análise do potencial eólico

O WRF (Weather Research and Forecast) é um software de modelagem numérica aplicado à atmosfera. Este modelo foi desenvolvido para a previsão do tempo e investigação de fenômenos atmosféricos de mesoescala. O WRF é de domínio público e de distribuição gratuita, possuindo diferentes aplicações que vão do campo da meteorologia até a engenharia, podendo ser aplicado tanto em situações de atmosfera idealizada quanto de atmosfera real. Atualmente, o campo de vento simulado por este software vem sendo utilizado como dado real. Assim, o modelo WRF passou a ser empregado em análises de vento para geração de energia eólica. Este trabalho, tem como objetivo simular o campo de vento empregando o modelo WRF para a cidade de Cachoeira do Sul, Rio grande do Sul, Brasil.

Modelling ocean ambient noise with finite ocean depth and comparisons with observations

The global International Monitoring System (IMS) network continuously detects coherent ambient infrasound noise between 0.1 and 0.5 Hz. This noise, referred to as microbaroms, is generated by the second order non-linear interaction of ocean waves, mostly during severe storms. A global and multi-year analyze of microbaroms highlights the strong influence of middle atmospheric conditions on the propagation. Various source models have been developed. Brekhovskikh et al. (1973) and Ardhuin and Herbers (2013) considered a source directivity effect in infinite depth ocean with radiative pressure depending on the wave elevation angle. Waxler and Gilbert (2006) and Waxler (2007) investigated the radiation of infrasound by ocean waves in finite depth ocean by monopolar sources. In this study, the combined effects of non-monopolar source and bathymetry on the radiation are addressed. Beyond theoretical issues, source modelisation and propagation through a realistic atmosphere are carried out. Comparing the predicted signals with the observed ones at all IMS stations shows good agreements for both directional and amplitude information. Building a global reference database of oceanic noise sources opens new perspectives for providing additional integrated constraints on middle atmosphere dynamics and disturbances.The global International Monitoring System (IMS) network continuously detects coherent ambient infrasound noise between 0.1 and 0.5 Hz. This noise, referred to as microbaroms, is generated by the second order non-linear interaction of ocean waves, mostly during severe storms. A global and multi-year analyze of microbaroms highlights the strong influence of middle atmospheric conditions on the propagation. Various source models have been developed. Brekhovskikh et al. (1973) and Ardhuin and Herbers (2013) considered a source directivity effect in infinite depth ocean with radiative pressure depending on the wave elevation angle. Waxler and Gilbert (2006) and Waxler (2007) investigated the radiation of infrasound by ocean waves in finite depth ocean by monopolar sources. In this study, the combined effects of non-monopolar source and bathymetry on the radiation are addressed. Beyond theoretical issues, source modelisation and propagation through a realistic atmosphere are carried out. Comparing the predicte...