Results 11 to 20 of about 2,055,953 (299)

Microbial Ecology of the Planetary Boundary Layer [PDF]

Atmosphere, 2020
Aerobiology is a growing research area that covers the study of aerosols with a biological origin from the air that surrounds us to space through the different atmospheric layers.
Romie Tignat-Perrier, Aurélien Dommergue, Timothy M. Vogel, Catherine Larose   +3 more
doaj   +4 more sources

The Nature, Theory, and Modeling of Atmospheric Planetary Boundary Layers

Bulletin of the American Meteorological Society, 2011
Planetary boundary layers (PBLs) represent sensitive and changeable coupling agents that regulate the fluxes of energy, momentum, and matter between the atmosphere and land or sea over a range of scales, from local to global. Numerical weather prediction (NWP), climate, air pollution, and coupled atmosphere–hydrosphere–biosphere models all include PBL ...
Peter Taylor, Larry Mahrt, Branko Grisogono   +2 more
exaly   +4 more sources

Universal dependences between turbulent and mean flow parameters instably and neutrally stratified Planetary Boundary Layers [PDF]

Nonlinear Processes in Geophysics, 2006
We consider the resistance law for the planetary boundary layer (PBL) from the point of view of the similarity theory. In other words, we select the set of the PBL governing parameters and search for an optimal way to express through these parameters the
I. N. Esau, I. N. Esau, S. S. Zilitinkevich, S. S. Zilitinkevich, S. S. Zilitinkevich   +4 more
doaj   +2 more sources

Kelvin–Helmholtz Instability at Mars: In Situ Observations and Kinetic Simulations

The Astrophysical Journal, 2023
Kelvin–Helmholtz (K-H) instability is a fundamental boundary instability between two fluids with different speeds, exchanging the mass, momentum, and energy across the boundary.
Lei Wang, Can Huang, Aimin Du, Yasong Ge, Guo Chen, Zhongwei Yang, Songyan Li, Kuixiang Zhang   +7 more
doaj   +1 more source

Evaluating convective planetary boundary layer height estimations resolved by both active and passive remote sensing instruments during the CHEESEHEAD19 field campaign [PDF]

Atmospheric Measurement Techniques, 2022
During the Chequamegon Heterogeneous Ecosystem Energy-balance Study Enabled by a High-density Extensive Array of Detectors 2019 (CHEESEHEAD19) field campaign, held in the summer of 2019 in northern Wisconsin, USA, active and passive ground-based remote ...
J. B. Duncan Jr., J. B. Duncan Jr., J. B. Duncan Jr., L. Bianco, L. Bianco, B. Adler, B. Adler, T. Bell, T. Bell, I. V. Djalalova, I. V. Djalalova, L. Riihimaki, L. Riihimaki, J. Sedlar, J. Sedlar, E. N. Smith, D. D. Turner, T. J. Wagner, J. M. Wilczak   +18 more
doaj   +1 more source

On the computation of planetary boundary-layer height using the bulk Richardson number method [PDF]

Geoscientific Model Development, 2014
Experimental data from four field campaigns are used to explore the variability of the bulk Richardson number of the entire planetary boundary layer (PBL), Ribc, which is a key parameter for calculating the PBL height (PBLH) in numerical weather and ...
Y. Zhang, Z. Gao, D. Li, Y. Li, N. Zhang, X. Zhao, J. Chen   +6 more
doaj   +1 more source

Numerical Solution of Fractional Models of Dispersion Contaminants in the Planetary Boundary Layer

Mathematics, 2023
In this study, a numerical solution for degenerate space–time fractional advection–dispersion equations is proposed to simulate atmospheric dispersion in vertically inhomogeneous planetary boundary layers.
Miglena N. Koleva, Lubin G. Vulkov
doaj   +1 more source

Evolution law of atmospheric boundary layer in Gurbantünggüt Desert based on reanalysis dataset and in situ observation data

Heliyon, 2023
As a special geographical unit on the earth, deserts have certain differences in planetary boundary layer (PBL) characteristics from other surface types.
Yu Wang, Jiacheng Gao, Ali Mamtimin, Hajigul Sayit, Chenglong Zhou, Rui Li, Mayir Dawut, Fan Yang, Wen Huo, Cong Wen, Meiqi Song, Ailiyaer Aihaiti   +11 more
doaj   +1 more source

Turbulent dispersion in cloud-topped boundary layers [PDF]

, 2009
Compared to dry boundary layers, dispersion in cloud-topped boundary layers has received less attention. In this LES based numerical study we investigate the dispersion of a passive tracer in the form of Lagrangian particles for four kinds of atmospheric
Vilà-Guerau de Arellano, J. (author), Heus, T., H. J. J. Jonker, J. Vilà-Guerau de Arellano, Heus, T. (author), Verzijlbergh, R.A. (author), Jonker, H.J.J., R. A. Verzijlbergh, Verzijlbergh, R.A., Jonker, H.J.J. (author), T. Heus, Vilà-Guerau de Arellano, J.   +11 more
core   +3 more sources

A comparison of vertical velocity variance measurements from wind profiling radars and sonic anemometers [PDF]

Atmospheric Measurement Techniques, 2017
Observations of turbulence in the planetary boundary layer are critical for developing and evaluating boundary layer parameterizations in mesoscale numerical weather prediction models.
K. McCaffrey, L. Bianco, P. Johnston, J. M. Wilczak   +3 more
doaj   +1 more source