wind influence
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2021 ◽  
Author(s):  
Nick Whitcomb ◽  
Abdulla Seliem ◽  
Rachel Marzen ◽  
Bernardo Jose Franco ◽  
Maria Agustina Celentano ◽  
...  

Abstract The study area covers 1,300 km2 in southeastern Abu Dhabi and focuses on the Aptian (Apt.) 5 Upper Shuaiba progradational clinoform system. The Shuaiba Formation has been well-studied at the regional level, but with comparatively less focus on the Apt. 5 system. Studying depositional trends and shoal facies distributions within the Apt. 5 is critical for predicting reservoir presence and quality. Given the complexity of the Apt. 5 system, understanding the key controls over depositional environments, such as paleowind direction, is an important first step. This study combined regional context and geological understanding with previous studies to confirm existing clinoform interpretation, while also delineating four additional clinoform sequences using a reprocessed depth migrated 3-D seismic volume. Isochron maps were also used to group clinoforms into three packages distinguished by common morphologies possibly linked to their respective dominant reservoir facies. Preliminary observations suggest early clinoforms had more rudist build-ups, whereas the later clinoforms were dominated by narrow-shoal beaches. Coalescing clinoform shoal patterns, observed in the spectral decomposition and amplitude extraction maps, likely result from a combination of Bab Basin morphology, longshore current, and dominant paleowind direction during the Early to Middle Cretaceous. Existing interpretations of dominant paleowind direction vary significantly, ranging between E-W and S-N. Interpretations from this study are most consistent with prevailing paleowind out of the east-southeast. The Arabian plate was likely near the equator around 10°S latitude during the Aptian, which supports the southeast wind hypothesis when considering modern Coriolis patterns. Consistent wind influence on shallow water shoal environments would have winnowed mud and increased the proportion of grain-dominated sediment preserved relative to lower energy areas. The grain-dominated facies appear to be reflected in amplitude responses around the coalescing clinoforms, and in the amplitude variations along strike coincident with clinoform edges. Reservoir presence and quality uncertainty can be reduced if these observations can be confirmed. An improved understanding of the Apt. 5 clinoform system in southeast Abu Dhabi, and possible influences on reservoir distribution and quality, will help develop a better understanding of risk for prospect maturation.


2021 ◽  
Author(s):  
Bartosz Zawilski

Abstract. The importance of the soil evaporation concerns our main life supports source for agriculture or for climate changes predictions science. A simple to operate instrument, based on non-steady state (NSS) technique, made for soil evaporation measurement appears then suitable. However, because the NSS chamber technique is highly invasive, special care should be provided to correct the wind influence on the evaporation process. As the wind influence on the evaporation is depending on numerous and not real-time monitorable variables, in order to make the measurements easily corrigible on a bare soil with a unique variable – wind speed (Ws), whatever is the soil nature, soil texture, and others soil or air meteorological variables – a self-calibrating chamber with corresponding protocol called Auto-calibrated Soil Evapo-Respiration Chamber (ASERC) was developed. A simple protocol followed by this chamber allows to determine the soil evaporation wind susceptibility (Z) and to correct the measurements achieving 0.95 accuracy confidence. Some interesting finding on sandy and clayey soils evaporation measured during a laboratory calibration will also be reported.


2021 ◽  
Vol 22 ◽  
pp. 56-65
Author(s):  
V Zdanevych ◽  
◽  
T Kundrat ◽  
S Litnitskyi ◽  
E Pugachev ◽  
...  

Author(s):  
Cynara De Lourdes da Nóbrega Cunha ◽  
Ada Cristina Scudelari ◽  
Danilo De Oliveira Sant'Ana ◽  
Teresa Elane Bezerra Luz ◽  
Mariana Kummer da Rocha Pinheiro

The Mundaú-Manguaba Estuary Lagoon Complex is located on the coast of Alagoas state in Northeastern Brazil, and consists of two shallow lagoons, Mundaú and Manguaba, that form a system of choked lagoons which are connected to the Atlantic Ocean by a series of narrow channels with a single outlet which dynamically alters its position. This study uses the Hydrodynamic Environmental System, SisBaHiA® to investigate how variations in river discharge and wind influence hydrodynamic circulation, water renewal, salinity and temperature in the lagoons. The free surface positions, obtained by model, were compared with the free surface positions measured at two points of the complex, showing good agreement. The analyses were carried out for dry and wet seasons and extreme events with very high freshwater discharge. The channel system of the lagoons is an efficient filter in reducing tidal variability inside the lagoons. The tidal ranges in the Manguaba and Mundaú Lagoons are 90% and 80% lower, respectively, as compared with the values in the open boundary. The residence time calculated varied between 11 and 365 days and between 2 and 180 days for the Manguaba and Mundaú Lagoons, respectively, making it possible to identify possible stagnation areas. The results from the salt and heat transport model show a prolonged period with low salt concentrations and slow salinity recovery after the rainy season; the water temperature in the lagoons shows little spatial and temporal variation.


2021 ◽  
Vol 147 (2) ◽  
pp. AB84
Author(s):  
German Ramon ◽  
Laura Barrionuevo ◽  
Graciela Benedetti ◽  
Valeria Duval

Author(s):  
Marko Novaselic ◽  
Robert Mohovic ◽  
Mate Baric ◽  
Luka Grbic
Keyword(s):  

2020 ◽  
Vol 1 (1) ◽  
pp. 107-115
Author(s):  
А Borysova ◽  
V Nignyk ◽  
D Sereda

The article presents the results of an experimental study to determine the dependence of the critical surface density of heat flux from wind influence.  The convergence of the obtained experimental data in each of the individual experiments was investigated.  The dependence of the critical surface heat flux density on wind influence is established and the regression is defined, which describes such dependence with the corresponding coefficients.


2020 ◽  
Vol 68 ◽  
pp. 104278
Author(s):  
Paloma L. Barros ◽  
Aurélio M. Luiz ◽  
Claudemi A. Nascimento ◽  
Antônio T.P. Neto ◽  
José J.N. Alves

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