Estimation of Atmospheric Boundary Layer Parameters for Diffusion Applications

Ulden, A. P. van; Holtslag, A.A.M.

doi:10.1175/1520-0450(1985)024<1196:eoablp>2.0.co;2

Cited by 335 publications

(199 citation statements)

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“…Using proposed methods by Van Ulden and Hostlag [3], a study of superficial fluids has been developed in the boundary atmospheric surface. It is considered that when an air mass circulates over a surface and goes to another one with different characteristics, its physical properties change [15] [16].…”

Section: Methodsmentioning

confidence: 99%

“…The main objective of this research was to study the atmospheric micro dynamic in the Ecuadorian plateau, for establishing the characteristics according to the produced effects because of the height and geographical position in the zone, by the utilization of proposed methods by Van Ulden and Hostlag in 1985 [3], which are adjusted to air physic properties in the zone, Haro A. et al (2014), using meteorological data measured at Universidad Nacional de Chimborazo station, located in Riobamba with a geographic position 1˚38' and 1˚4' south latitude, 78˚39' y 78˚40' west longitude, highland at 2754 m a.s.l located in the Ecuadorian plateau.…”

Section: Introductionmentioning

confidence: 99%

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Characterisation of Micrometeorological Parameters in Ecuadorian Highland

Perugachi¹,

Limaico²,

Cocha³

et al. 2017

ACS

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The interaction among air and soil affects the dynamic in the atmospheric boundary layer, this research seeks to describe this variation in small scale, in the Ecuadorian Highlands Regions and the variations produced due to its elevation and geographical position, using as base the Van Ulden and Hostlang (1985) models. From this research, there was a conclusion that the zone has strong fluids of sensitive heat and superficial heat with small variations in the latent fluid heat. Besides, there were significant variations of the Obukov length between 17:00 and 19:00, when the sunset occurs, producing a thermal inversion that modifies the atmospheric dynamic state, these results average vary during the day hours and are regulars in the daily and monthly average, in the research year, given the zone geographical position. The meteorological data utilized were taken from the meteorological station from Universidad Nacional de Chimborazo located in the Ecuadorian Highlands.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterisation of Micrometeorological Parameters in Ecuadorian Highland

Perugachi¹,

Limaico²,

Cocha³

et al. 2017

ACS

View full text Add to dashboard Cite

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“…For neutral to stable conditions, a number of expressions based on similarity theory exist for estimating the top of the ABL. Van Ulden and Holtslag (1985) review several of these methods.…”

Section: Methods Based On Surface Fluxesmentioning

confidence: 99%

Methods for determining the height of the atmospheric boundary layer

Sugiyama

Nasstrom

1999

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“…As T 0 is difficult to observe over a large spatial region, T 0 here is estimated by T 0 following previous studies [10,15,16]. Because the air temperature and surface temperature during the day (night) are quite different, kd is used to correct the diurnal surface temperature.…”

Section: Narp Schemementioning

confidence: 99%

Modeling the radiation balance of different urban underlying surfaces

Cui

Liu

et al. 2012

Chin. Sci. Bull.

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An urban net all-wave radiation parameterization scheme is evaluated using annual datasets for 2010 recorded at a Beijing urban observation site. The statistical relationship between observed data and simulation data of net radiation has a correlation coefficient of 0.98 and model efficiency of 0.93. Therefore, it can be used to simulate the radiation balance of Beijing. This study analyzes the variation in the radiation balance for different underlying surfaces. To simulate radiation balance differences, we set four pure land-cover types (forest, grass, roads, and buildings). Keeping all other conditions inputted unchanged, we model the radiation balance by changing the land-cover type. The results show that the effects of different underlying surfaces on radiation differ, and that there is much upward long-wave radiation, accounting for 84.3% of the total radiation energy falling incident on the land surface. The annual averages of net radiation for the four land-cover types are in the range of 38.2-53.4 W/m 2 . The net radiation of the grass surface is minimal while that of the roads surface is maximal. Additionally, with urbanization the net radiation values of common types of land-cover change, such as conversion from forest to roads, grass to roads, and grass to buildings, all have increasing trends, indicating that net radiation usually increases with urban sprawl. Land surfaces interact with the atmosphere through the exchange of water, energy and momentum. Any changes in energy flux between the land and atmosphere will affect the atmospheric thermal conditions and atmospheric circulation. The underlying surfaces (land use/land cover classes) greatly affect the climate according to their physical properties, such as the surface albedo, roughness, and emissivity [1]. The components of the radiation balance, the net radiation in particular, are main components of the land surface energy budget and are important physical and ecological parameters in the land-atmosphere energy exchange and redistribution [2]. The relationship between the type of urban underlying surface and the radiation energy budget is a core issue of urban climate. The effect of the urban land surface energy flux on local climate has been verified in many studies [3]. Therefore, systematic analysis of the urban radiation balance of various underlying surfaces is a basis and prerequisite for urban energy balance studies, and it is also important in understanding change processes of urban energy for different underlying surfaces and local climate caused by urban sprawl [4].The basic characteristic of urban landscape is the spatial heterogeneity of its land surfaces, and differences in landscape composition lead to the nonuniformity of energy transmission and distribution. Urban land surface is a complex physical interface. As surface characteristics change, the thermodynamic and kinetic properties of underlying surfaces can substantially change. All these disturbance factors will result in city-specific climatic characteristics. Most previo...

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Estimation of Atmospheric Boundary Layer Parameters for Diffusion Applications

Cited by 335 publications

References 0 publications

Characterisation of Micrometeorological Parameters in Ecuadorian Highland

Characterisation of Micrometeorological Parameters in Ecuadorian Highland

Methods for determining the height of the atmospheric boundary layer

Modeling the radiation balance of different urban underlying surfaces

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